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1Magnetic-dielectric synergy and interfacial engineering to design yolk-shell structured CoNi@void@C and CoNi@void@C@MoS_(2) nanocomposites with tunable and strong wideband microwave absorption显示文摘In order to effectively utilize the magnetic-dielectric synergy and interfacial engineering,in this paper,yolk–shell structured magnetic multicomponent nanocomposites(MCNCs)including CoNi@void@C and CoNi@void@C@MoS_(2) were produced in large scale by in-situ pyrolysis of cubic CoNi Prussian blue analogs(PBAs)followed by the hydrothermal process,respectively.Because of their unique structures,excellent synergistic effect between dielectric and magnetic loss,the as-prepared CoNi@void@C and CoNi@void@C@MoS_(2) MCNCs displayed very outstanding electromagnetic wave absorption performances(EMWAPs)including strong absorption capabilities,broad absorption bandwidth and thin matching thicknesses.Furthermore,the as-prepared CoNi@void@C and CoNi@void@C@MoS_(2) MCNCs well maintained the cubic configuration of CoNi PBAs even after the thermal treatment and hydrothermal processes.The unique structure and formed carbon layers effectively prevented the corrosion of internal CoNi alloy during the formation of MoS_(2),and CoNi@void@C@MoS_(2) MCNCs with different MoS_(2) contents could be synthesized by controlling the hydrothermal temperature.The obtained results revealed that the EM parameters,dielectric and magnetic loss capabilities of CoNi@void@C@MoS_(2) MCNCs could be tuned by controlling hydrothermal temperature and filler loading,which made their outstanding EMWAPs could be achieved in different frequency regions.Taking account of simple process,low density and high chemical stability,our findings provided a new and effective pathway to develop the strong wideband microwave absorbers.Chen Li Xiaosi Qi Xiu Gong Qiong Peng Yanli Chen Ren Xie Wei Zhong 2022Nano Research2022,15,7:11
2AI for 5G: research directions and paradigms显示文摘Wireless communication technologies such as fifth generation mobile networks(5 G) will not only provide an increase of 1000 times in Internet traffic in the next decade but will also offer the underlying technologies to entire industries to support Internet of things(IOT) technologies. Compared to existing mobile communication techniques, 5 G has more varied applications and its corresponding system design is more complicated. The resurgence of artificial intelligence(AI) techniques offers an alternative option that is possibly superior to traditional ideas and performance. Typical and potential research directions related to the promising contributions that can be achieved through AI must be identified, evaluated, and investigated.To this end, this study provides an overview that first combs through several promising research directions in AI for 5 G technologies based on an understanding of the key technologies in 5 G. In addition, the study focuses on providing design paradigms including 5 G network optimization, optimal resource allocation, 5 G physical layer unified acceleration, end-to-end physical layer joint optimization, and so on.Xiaohu YOU Chuan ZHANG Xiaosi TAN Shi JIN Hequan WU 2019Science China(Information Sciences)2019,62,2:10
3Hierarchical engineering of CoNi@Air@C/SiO_(2)@Polypyrrole multicomponent nanocubes to improve the dielectric loss capability and magnetic-dielectric synergy显示文摘Impedance matching characteristics and loss capabilities including magnetic loss,polarization loss and conduction loss are critical factors to improve microwave absorption performances(MAPs).To elevate these aspects,herein,yolk-shell structured CoNi@Air@C/SiO_(2)@Polypyrrole(PPy)magnetic multicomponent nanocubes(MCNCs)were designed and successfully fabricated in high efficiency through a continuous co-precipitation route,classical Stöber method,thermal treatment and polymerization reaction.The obtained results indicated that the formation of SiO_(2) effectively stabilized the cubic geometrical morphology and yolk-shell structure during the high-temperature pyrolysis process.The introduction of PPy greatly boosted their polarization loss and conductive loss capabilities.Therefore,the as-prepared yolkshell structured CoNi@Air@C/SiO_(2)@PPy MCNCs presented superior MAPs compared to CoNi@Air@C/SiO_(2) MCNCs.Furthermore,by regulating the content of PPy,the obtained CoNi@Air@C/SiO_(2)@PPy MCNCs displayed tunable and excellent comprehensive MAPs in terms of strong absorption capabilities,broad frequency bandwidths and thin matching thicknesses,which could be ascribed to the unique structure and excellent magnetic-dielectric synergistic effect.Therefore,our findings provided an alternative pathway to effectively utilize the magnetic-dielectric synergy and loss capabilities for the developing yolk-shell structured magnetic MCNCs as the strong wideband microwave absorbers.Qiqin Liang Lei Wang Xiaosi Qi Qiong Peng Xiu Gong Yanli Chen Ren Xie Wei Zhong 2023Journal of Materials Science & Technology2023,,16:7
4Surrogate production of genome-edited sperm from a different subfamily by spermatogonial stem cell transplantation显示文摘The surrogate reproduction technique,such as inter-specific spermatogonial stem cells(SSCs)transplantation(SSCT),provides a powerful tool for production of gametes derived from endangered species or those with desirable traits.However,generation of genome-edited gametes from a different species or production of gametes from a phylogenetically distant species such as from a different subfamily,by SSCT,has not succeeded.Here,using two small cyprinid fishes from different subfamilies,Chinese rare minnow(gobiocypris rarus,for brief:Gr)and zebrafish(danio rerio),we successfully obtained Gr-derived genome-edited sperm in zebrafish by an optimized SSCT procedure.The transplanted Gr SSCs supported the host gonadal development and underwent normal spermatogenesis,resulting in a reconstructed fertile testis containing Gr spermatids and zebrafish testicular somatic cells.Interestingly,the surrogate spermatozoa resembled those of host zebrafish but not donor Gr in morphology and swimming behavior.When pou5f3 and chd knockout Gr SSCs were transplanted,Gr-derived genome-edited sperm was successfully produced in zebrafish.This is the first report demonstrating surrogate production of gametes from a different subfamily by SSCT,and surrogate production of genome-edited gametes from another species as well.This method is feasible to be applied to future breeding of commercial fish and livestock.Fenghua Zhang Yongkang Hao Xianmei Li Yi Li Ding Ye Ru Zhang Xiaosi Wang Mudan He Houpeng Wang Zuoyan Zhu Yonghua Sun 2022Science China(Life Sciences)2022,65,5:7
5Defect and interface engineering in core@shell structure hollow carbon@MoS_(2)nanocomposites for boosted microwave absorption performance显示文摘Defect and interface engineering are efficient approaches to adjust the physical and chemical properties of nanomaterials.In order to effectively utilize these strategies for the improvement of microwave absorption properties(MAPs),in this study,we reported the synthesis of hollow carbon shells and hollow carbon@MoS_(2)nanocomposites by the template-etching and templateetching-hydrothermal methods,respectively.The obtained results indicated that the degree of defect for hollow carbon shells and hollow carbon@MoS_(2)could be modulated by the thickness of hollow carbon shell,which effectively fulfilled the optimization of electromagnetic parameters and improvement of MAPs.Furthermore,the microstructure investigations revealed that the precursor of hollow carbon shells was encapsulated by the sheet-like MoS_(2)in high efficiency.And the introduction of MoS_(2)nanosheets acting as the shell effectively improved the interfacial effects and boosted the polarization loss capabilities,which resulted in the improvement of comprehensive MAPs.The elaborately designed hollow carbon@MoS_(2)samples displayed very outstanding MAPs including strong absorption capabilities,broad absorption bandwidth,and thin matching thicknesses.Therefore,this work provided a viable strategy to improve the MAPs of microwave absorbers by taking full advantage of their defect and interface engineering.Junxiong Xiao Xiaosi Qi Xiu Gong Qiong Peng Yanli Chen Ren Xie Wei Zhong 2022Nano Research2022,15,9:6
6Microstructure optimization of core@shell structured MSe_(2)/FeSe_(2)@MoSe_(2)(M=Co,Ni)flower-like multicomponent nanocomposites towards high-efficiency microwave absorption显示文摘In this work,we put forward a scheme to exquisitely design and selectively synthesize the core@shell structured MSe_(2)/FeSe_(2)@MoSe_(2)(M=Co,Ni)flower-like multicomponent nanocomposites(MCNCs)through a simple two-step hydrothermal reaction on the surfaces of MFe_(2)O_4 nanospheres with the certain amounts of Mo and Se sources.With increasing the amounts of Mo and Se sources,the obtained core@shell structured MSe_(2)/FeSe_(2)@MoSe_(2)(M=Co,Ni)MCNCs with the enhanced content of MoSe_(2)and improved flower-like geometry morphology could be produced on a large scale.The obtained results revealed that the as-prepared samples displayed improved comprehensive microwave absorption properties(CMAPs)with the increased amounts of Mo and Se sources.The as-prepared CoSe_(2)/FeSe_(2)@MoSe_(2)and NiSe_(2)/FeSe_(2)@MoSe_(2)MCNCs with the well-defined flower-like morphology could simultaneously present the outstanding CMAPs in terms of strong absorption capability,wide absorption bandwidth,and thin matching thicknesses,which mainly originated from the conduction loss and flower-like geometry morphology.Therefore,the findings not only develop the very desirable candidates for high-performance microwave absorption materials but also pave a new way for optimizing the CMAPs through tailoring morphology engineering.Jingjing Zhang Xiaosi Qi Xiu Gong Qiong Peng Yanli Chen Ren Xie Wei Zhong 2022Journal of Materials Science & Technology2022,,33:5
7Groundwater Systems and Resources in the Ordos Basin,China显示文摘Ordos 盆是在西北的中国的大规模沉积的盆。到顶的从底部的 hydrostratigraphic 单位是 pre 寒武纪的变形岩石,更低的古生代的碳酸盐岩石,上面对中生代碎屑状的岩石和新生代存款古生代。全部的厚度直到 6000 m。三个地下水系统在 Ordos 盆是在场的,基于地质的设置,即石灰岩地区常见的地形地下水系统,白垩纪碎屑状的地下水系统和第四级的地下水系统。这份报纸系统地描述每个系统的地下水流动模式和对地下水资源的全面评价。HOU Guangcai LIANG Yongping SU Xiaosi ZHAO Zhenghong TAO Zhengping YIN Lihe YANG Yuncheng WANG Xiaoyong 2008Acta Geologica Sinica(English Edition)2008,82,5:5
8Shenzhousia qilianshanensis gen. et sp. nov. (Protodonata, Meganeuridae), a giant dragonfly from the Upper Carboniferous of China显示文摘家庭 Meganeuridae Shenzhousia qilianshanensisge 的一只新蜻蜓。et sp。nov,在诺思中国从 Ningxia Hui 自治区域发现了,在现在的纸被描述。它有大约 450-500 公里的估计的翼展并且可以是在迄今为止发现的晚含碳的 Namurian 舞台的最大的石块昆虫。新种类是因为在半径(RA ) 的前面的分支和半径(RP ) 的以后的分支之间的典型倾斜的静脉的存在,在 RP 2 的底附近指了 Meganeuridae。它在下列特征在家庭以内不同于另外的类:对中间的翅膀短、不扩大的 Precostal 区域;以后的分支突然代替肋骨的静脉,在红外 2 的发源的点的水平附近合并进肋骨的静脉;基础地比媒介的前面的分支早分叉的 RP;RP 1+2 和 RP 3+4 平行和为长距离的结束到对方,然后逐渐地分叉超过中间的翅膀。ZHANG Zhijun HONG Youchong LU Liwu FANG Xiaosi JIN Yuegao 2006Progress in Natural Science:Materials International2006,16,3:5
9Challenges and perspectives of covalent organic frameworks for advanced alkali-metal ion batteries显示文摘Covalent organic frameworks(COFs)are a class of porous crystalline polymers that have been widely investigated in various fields,including energy storage,photo/electrocatalysis,drug delivery.The covalent-bond interconnection allows COFs extraordinary chemical and thermal stability,and the porous structure ensures a high ion-diffusion coefficient.These merits compensate for the drawbacks of organic electrodes that are easy to dissolve and have low charge conductivity,and promote the development of novel electrode materials with excellent performance,environmental friendliness,and low price.However,the application of COFs also encountered many problems,such as poor electronic conductivity due to the large band gap.Moreover,in some three-dimensional(3D)COFs and stacked two-dimensional(2D)COFs,the huge crystal structure,aligned ultralong channels,and numerous crystal defects usually impede ion transport,and the large molecular weights of COFs generally decrease the specific capacities.These issues are urgently needed to be solved.Here in this review,we summarize the latest progress,core challenges and coping strategies concerning with the use of COFs in alkali-metal ion batteries,discuss the impact of material structure on energy storage,and propose strategies for the construction of high-performance COF-based electrodes.Jingyi Xu Yifan Xu Chenling Lai Tingting Xia Beining Zhang Xiaosi Zhou 2021Science China Chemistry2021,64,8:5
10Tunable and improved microwave absorption of flower-like core@shell MFe_(2)O_(4)@MoS_(2)(M=Mn,Ni and Zn)nanocomposites by defect and interface engineering显示文摘Previous results revealed that the defect and/or interface had a great impact on the electromagnetic pa-rameters of materials.In order to understand the main physical mechanisms and effectively utilize these strategies,in this study,M Fe_(2)O_(4)and flower-like core@shell M Fe_(2)O_(4)@MoS_(2)(M=Mn,Ni,and Zn)sam-ples with different categories were elaborately designed and selectively produced in large scale through a simple two-step hydrothermal reaction.We conducted the systematical investigation on their microstruc-tures,electromagnetic parameters and microwave absorption performances(MAPs).The obtained results revealed that the large radius of M^(2+)cation could effectively boost the concentration of oxygen vacancy in the M Fe_(2)O_(4)and M Fe_(2)O_(4)@MoS_(2)samples,which resulted in the improvement of dielectric loss capabil-ities and MAPs.Furthermore,the introduction of MoS_(2)nanosheets greatly improved the interfacial effect and enhanced the polarization loss capabilities,which also boosted the MAPs.By taking full advantage of the defect and interface,the designed M Fe_(2)O_(4)@MoS_(2)samples displayed tunable and excellent com-prehensive MAPs including strong absorption capability,wide absorption bandwidth and thin matching thicknesses.Therefore,the clear understanding of defect and interface engineering made these strategies well elaborately designed and applicable to improving MAPs.Junxiong Xiao Xiaosi Qi Xiu Gong Qiong Peng Yanli Chen Ren Xie Wei Zhong 2023Journal of Materials Science & Technology2023,,8:5
11Reconstructing past subsistence patterns on Zhongba Site using stable carbon and oxygen isotopes of fossil tooth enamel显示文摘The oxygen and carbon isotopic ratios in human and animal tooth enamel were measured to reconstruct the subsistence patterns on Zhongba Site between 2400 and 4200 aBP.The results indicate that human consumed chiefly C4 resources,such as millet,and the C3 plants,such as rice and wheat,constituted only a small fraction of the human diets,normally no more than 15%.There are significant differences in food sources between human and pig,and the percentages of C3 plants in pig diets were higher than those in human diets.But theδ13C values of pig partially overlap those of human,demonstrating some similarities in their food sources.The differences in water sources between human and pig are significant.There are significant differences in food and water sources between cattle and deer. This indicates that the two kinds of mammals subsisted in different niches.But theirδ13C values also partially overlap each other,suggesting some similarities in their food sources.There are both signifi- cant differences in meanδ13C andδ18O values between the omnivores,human and pig and the herbi- vores,cattle and deer,implying significant differences in food and water sources between the two categories.During the period the dietary habits of human had not changed,but the pig breeding strategies had changed,from breeding in house to breeding in confinement,and the proportion of C3 plants in pig food increased with time.The scope of human migration had been considerably large by the Warring States because of the development of productive forces.XiaoSi Tian Cheng Zhu XinWang Xu ChunMei Ma ZhiBin Sun Qian Yin Qing Zhu Wei Shi 2008Chinese Science Bulletin2008,53,S1:4
12Ultrafine SnSSe/multilayer graphene nanosheet nanocomposite as a high-performance anode material for potassium-ion half/full batteries显示文摘Layer-structured Shsse attracts much attention as an anode material for potassium storage due to its la rge theoretical capacity.Unfortunately,their practical application is severely restrained by the dramatic volumetric variation of SnSSe.Herein,we synthesize ultrafine SnSSe/multilayer graphene nanosheet(SnSSe/MGS) by a vacuum solid-phase reaction and subsequent ball milling.Owing to the strong synergistic effect between the two components,the obtained SnSSe/MGS nanocomposite exhibits a high reversible capacity(423 mAh g^(-1) at 100 mA g^(-1)),excellent rate property(218 mAh g^(-1) at 5 A g^(-1)),and stable cycling performance(271 mAh g^(-1) after 500 cycles at 100 mA g^(-1)) in potassium-ion half batteries.Moreover,the full cell assembled by the SnSSe/MGS anode and the potassiated 3,4,9,10-perylene-tetracar boxylic aciddianhydride cathode shows excellent electrochemical performance between 0.2 and 3.3 V(209 mAh g^(-1) at 50 mA g^(-1) after 100 cycles).The presented two-step synthesis strategy of SnSSe/MGS may also provide ideas to craft other alloy-type anode materials.Zuyue Yi Jingyi Xu Zhenhua Xu Min Zhang Yanan He Jianchun Bao Xiaosi Zhou 2021Journal of Energy Chemistry2021,30,9:3
13Comprehensive Analysis and Artificial Intelligent Simulation of Land Subsidence of Beijing, China显示文摘Mechanism and modeling of the land subsidence are complex because of the complicate geological background in Beijing, China. This paper analyzed the spatial relationship between land subsidence and three factors, including the change of groundwater level, the thickness of compressible sediments and the building area by using remote sensing and GIS tools in the upper-middle part of alluvial-proluvial plain fan of the Chaobai River in Beijing. Based on the spatial analysis of the land subsidence and three factors, there exist significant non-linear relationship between the vertical displacement and three factors. The Back Propagation Neural Network (BPN) model combined with Genetic Algorithm (GA) was used to simulate regional distribution of the land subsidence. Results showed that at field scale, the groundwater level and land subsidence showed a significant linear relationship. However, at regional scale, the spatial distribution of groundwater depletion funnel did not overlap with the land subsidence funnel. As to the factor of compressible strata, the places with the biggest compressible strata thickness did not have the largest vertical displacement. The distributions of building area and land subsidence have no obvious spatial relationships. The BPN-GA model simulation results illustrated that the accuracy of the trained model during fifty years is acceptable with an error of 51% of verification data less than 20 mm and the average of the absolute error about 32 mm. The BPN model could be utilized to simulate the general distribution of land subsidence in the study area. Overall, this work contributes to better understand the complex relationship between the land subsidence and three influencing factors. And the distribution of the land subsidence can be simulated by the trained BPN-GA model with the limited available dada and acceptable accuracy.ZHU Lin GONG Huili LI Xiaojuan LI Yongyong SU Xiaosi GUO Gaoxuan 2013Chinese Geographical Science2013,23,2:3
14Octavinyl polyhedral oligomeric silsesquioxane on tailoring the DC electrical characteristics of polypropylene显示文摘This work reports the effect of octavinyl polyhedral oligomeric silsesquioxane(OvPOSS)on tuning the electrical performance of polypropylene(PP).OvPOSS with different content are introduced into PP using the solution method.The microstructural morphology,crystallinity behaviour,breakdown strength,DC conductivity,space charge formation,and trapping level distribution are measured.The results indicate that the OvPOSS nanofiller can be dispersed uniformly with a doping content of 2.0 phr or less.The DC conductivity is decreased,and the breakdown strength of OvPOSS/PP nano-composites is significantly increased.The space charge accumulation of the OvPOSS/PP nanocomposites is significantly suppressed due to the introduction of deeper traps by the OvPOSS nanofiller.Finally,the experimental results demonstrate that the OvPOSS nanofiller can greatly increase the electrical performance of the base PP and the OvPOSS/PP nanocomposites have much potential for HVDC applications.They further demonstrate that the PP is environmental‐friendly due to its thermo‐plastic property,which can be recycled after the manufacture.Xiaosi Lin Wah Hoon Siew John Liggat Martin Given Jinliang He 2022High Voltage2022,7,1:2
15Room temperature ferromagnetism of Ni, (Ni, Li), (Ni, N)-doped ZnO thin films显示文摘Ni-doped ZnO thin films (Ni concentration up to 10 mol%) were generated on Si (100) substrates by a sol-gel technique. The films showed wurtzite structure and no other phase was found. The chemical state of Ni was found to be bivalent by X-ray photoelectron spectroscopy. The results of magnetic measurements at room temperature indicated that the films were ferromagnetic, and magnetic moment decreased with rise of Ni concentration. The magnetization of Ni (10 mol%)-doped ZnO film annealed in nitrogen was lower than that annealed in argon, suggesting that the density of defects had an effect on ferromagnetism.YE XiaoJuan SONG HaiAn ZHONG Wei QI XiaoSi XU MeiHua JIN ChangQing YANG ZaiXin AU ChakTong DU YouWei 2010中国科学:技术科学2010,40,2:2
16Carbon and nitrogen stable isotope analyses of mammal bone fossils from the Zhongba site in the Three Gorges Reservoir region of the Yangtze River,China显示文摘Based on AMS 14 C dating data,carbon and nitrogen isotope analyses were conducted on mammal bone collagen of deer,cattle and pigs from the Zhongba site in the Three Gorges Reservoir region of the Yangtze River.These analyses were conducted to reconstruct palaeodiets of mammals,palaeoecology,palaeoenviroment and previous human activities in the study area.Results show that the collagen loss of bone did not change the in vivo isotopic composition of carbon and nitrogen stable isotopes,and most of the bone fossils were well preserved.The bone collagen of samples from deer had a mean δ 13 C of-23.1‰ and a mean δ 15 N of 4.7‰,suggesting that deer subsisted in a closed habitat and fed on branches and leaves.The bone collagen of cattle had a mean δ 13 C of-19.6‰ and a mean δ 15 N of 5.2‰,which indicates that cattle subsisted in an open habitat and fed on grasses and stems.The δ 13 C values show that both deer and cattle fed on C 3 plants and lived in the same ecosystem,but the t-test results show that deer δ 13 C and δ 15 N values were both more negative than those of cattle,indicating that they inhabited different niches.The δ 13 C and δ 15 N values of cattle partially overlapped those of deer,suggesting some competition in diets between them.The t-tests show that the δ 13 C and δ 15 N values of pigs were more positive than those of cattle and deer,which signifies that pigs occupied a higher trophic level compared to cattle and deer.The wide range of pig δ 13 C values demonstrates that pig trading had been taking place from early Neolithic Age to late Bronze Age.There were no significant differences in deer δ 13 C and δ 15 N values among different archaeological periods,making it clear that climatic,ecological and environmental conditions were kept relatively stable from 2200 to 4200 a BP.This stability may have been responsible for the extensive and complete cultural layers at the Zhongba site.The minimum number of samples required to estimate the mean δ 13 C values of deer,pigs and cattle are 8,73 and 16,respectively,and for mean δ 15 N values of deer,pigs and cattle,the minimum numbers are 4,5 and 6,respectively.TIAN XiaoSi ZHU Cheng SUN ZhiBin SHUI Tao HUANG YunPing FLAD Rowan Kimon LI YuMei 2011Chinese Science Bulletin2011,56,2:2
17The Main Characteristics and Disposal of Municipal Garbage in Changchun City of China显示文摘Based on current situations of Chinese garbage management and disposal, this paper is centered on introduction of some research results of household garbage in Changchun, capital city of Jilin Province, northeast China. From the viewpoint of man the earth system, garbage is characterized by sociality, temporal and spatial differentiation and limitation and other features, which imply that the garbage research being involved with natural science and social science should not only focus on the natural features but also on the social features. Compared to some developed cities, the material composition of garbage in Changchun is typically characterized by high moisture content, low combustion value and minor recyclable materials. Concentration, cycle shaping and self similarity characterize the garbage distribution. The tracing investigation on 683 households ten times shows that three fourths of the total garbage yield in Changchun is derived from non domestic units and that the attention of garbage management, especially source reduction, should be focused on the non domestic units. The GM(1,1) prediction model has been set up and the prediction result shows that the amount of garbage yield of Changchun in 2004 will be up to 1,500,000 tons. Investigation of environmental consciousness to garbage problems have been carried out. Based on the above characteristics of garbage, the disposal countermeasures of Changchun garbage have been suggested.Su Xiaosi, Zhang Yixia, Yan Jingqi, Jin Wei and Sun Jiapeng (Changchun University of Science and Technology, Changchun,China, 130026) 1999Global Geology1999,4,1:2
18Sn_(4)P_(3)nanoparticles confined in multilayer graphene sheets as a high-performance anode material for potassium-ion batteries显示文摘Phosphorus-based anodes are highly promising for potassium-ion batteries(PIBs)because of their large theoretical capacities.Nevertheless,the inferior potassium storage properties caused by the poor electronic conductivity,easy self-aggregation,and huge volumetric changes upon cycling process restrain their practical applications.Now we impregnate Sn_(4)P_(3)nanoparticles within multilayer graphene sheets(Sn_(4)P_(3)/MGS)as the anode material for PIBs,greatly improving its potassium storage performance.Specifically,the graphene sheets can efficiently suppress the aggregation of Sn_(4)P_(3)nanoparticles,enhance the electronic conductivity,and sustain the structural integrity.In addition,plenty of Sn_(4)P_(3)nanoparticles impregnated in MGS offer a large accessible area for the electrolyte,which decreases the diffusion distance for K^(+)and electrons upon K^(+)insertion/extraction,resulting in an improved rate capability.Consequently,the optimized Sn_(4)P_(3)/MGS containing 80 wt%Sn_(4)P_(3)(Sn_(4)P_(3)/MGS-80)exhibits a high reversible capacity of 378.2 and 260.2 m Ah g;at 0.1 and 1 A g^(-1),respectively,and still delivers a large capacity retention of 76.6%after the 1000th cycle at 0.5 A g^(-1).Yichen Du Zuyue Yi Bingbing Chen Jingyi Xu Zhuangzhuang Zhang Jianchun Bao Xiaosi Zhou 2022Journal of Energy Chemistry2022,31,3:2
19Preparation, electromag- netic and enhanced microwave absorption properties of Fe nanoparticles encapsulated in carbon nanotubes显示文摘Xiaosi Qi Jianle Xu Q Hu 2015Materi- als Science and Engineering B2015,198,:1
20The Evaporation Effect on the Isotopes in the Yellow River Water显示文摘Based on the isotope analysis result of water samples in the 18 sections of the Yellow River, the variation of δ 18 O and δD have been analyzed. From near the source to the entrance to the sea, the Yellow River has a general trend that the ratios of the stable isotope increase progressively; The main factors affecting the isotopes in the river water are mixing of external water bodies,evaporation and others; In the river segment between Lanzhou and Baotou and in lower reaches, the extent of the evaporation effect on the isotope fractionation from the river water surface is limited but the evaporation from the irrigated river water and the return flow is one of the main factors affecting the isotopes in river water.SU Xiaosi, LIN Xueyu and LIAO Zisheng (College of Environment and Resources, Jilin University, Changchun 130026, P.R.China) WANG Jinsheng (Beijing Normal University, Beijing, 100873, P. R. China) 2001Global Geology2001,6,2:1
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