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1Nitrogen doped porous carbon as excellent dual anodes for Li-and Na-ion batteries显示文摘Biomass-derived carbon materials have obtained great attention due to their sustainability,easy availability,low cost and environmentally benign.In this work,bamboo leaves derived nitrogen doped hierarchically porous carbon have been efficiently synthesized via an annealing approach,followed by an etching process in HF solution.Electrochemical measurements demonstrate that the unique porous structure,together with the inherent high nitrogen content,endow the as-derived carbon with excellent lithium/sodium storage performance.The porous carbon annealed at 700℃presents outstanding rate capability and remarkable long-term stability as anodes for both lithium-ion batteries and sodium-ion batteries.The optimized carbon delivers a high discharge capacity of 450 mAh/g after 500 cycles at the current density of 0.2 A/g for LIBs,and a discharge capacity of 180 mAh/g after 300 cycles at the current density of 0.1 A/g for SIBs.Zhanheng Yan Qin-Wen Yang Qinghong Wang Jianmin Ma 2020Chinese Chemical Letters2020,31,2:20
2Facile fabrication of MoP nanodots embedded in porous carbon as excellent anode material for potassium-ion batteries显示文摘Molybdenum phosphide(MoP),owing to its abundant reserve and high theoretical capacity,is regarded as a promising anode material for potassium-ion batteries.However,it still suffers from the problems of acute volume expansion and weak diffusion kinetics.This study reports a simple method to synthesize a composite of molybdenum phosphide and porous carbon(MoP@PC)through simple mixing and annealing treatment.In the MoP@PC,lots of MoP nanodots with an average diameter of about 4 nm uniformly embedded in the petal-like porous carbon.The MoP@PC shows reversible capacities of 330 mAh g^(-1) at100 mA g^(-1) after 100 cycles,and ultra-long cycling stability with a capacity of 240 mAh g^(-1) after 1000 cycles at 1 A g^(-1) and 161 mAh g^(-1) after 1000 cycles at 5 A g^(-1).The structure of MoP@PC after charging-discharging cycles is also investigated by high resolution transmission electron microscope(HRTEM)and the result shows that MoP can still maintain the nanodot morphology without any agglomeration after 1000 cycles at 5 A g^(-1).The storage mechanism of potassium ions was studied as well,which reveals that MoP and potassium ion have a conversion reaction.Zhanheng Yan Zhongyuan Huang Haihui Zhou Xinxin Yang Songlin Li Wenlong Zhang Fei Wang Yafei Kuang 2021Journal of Energy Chemistry2021,30,3:5
33D hierarchical microspheres constructed by ultrathin MoS2-C nanosheets as high-performance anode material for sodium-ion batteries显示文摘MoS2/C composites are considered to have great application potential in sodium-ion batteries(SIBs).It is a challenging and meaningful subject that developing high-performance anode materials via combining MoS2 and carbon effectively to give free rein to their advantages in sodium ion storage.In this work,a novel MoS2-C material was designed by using cellulose nanocrystals(CNCs)as low-cost and green carbon source.3 D hierarchical microspheres(200-250 nm)constructed by ultrathin MoS2-C nanosheets were synthesized by synchronizing the pre-carbonization of CNCs with the formation of MoS2 in hydrothermal reaction and subsequent pyrolysis process.It is found that the ultrathin MoS2-C nanosheets were composed of CNCs-derived short-range ordered carbon and few-layered MoS2.Benefiting from the unique structure and robust combination of MoS2 and CNCs-derived carbon,the ultrathin MoS2-C nanosheets composite was proved to have excellent cycling stability and superior rate performance in sodium-ion half-cell test and have high first reversible specific capacity of 397.9 m Ah/g in full-cell test.This work provides a significant and effective pathway to prepare MoS2-C materials with excellent electrochemical performance for the application in large-scale energy storage systems.Wenlong Zhang Haihui Zhou Zhongyuan Huang Songlin Li Chuqing Wang Huanxin Li Zhanheng Yan Teng Hou Yafei Kuang 2020Journal of Energy Chemistry2020,29,10:3
4Development of rare earth resources outside China and rare earth supply & demand relationships显示文摘1. The development of rare earth resources outside China With the promotion of domestic rectification on rare earth industry and cracking down on illegal rare earth production, illegal rare earth mining has been restrained to some extent. The current rare earth industry policies, especially the total volume control policy and the management on rare earth exploration and mining rights, stimulate the development of rare earth projects outside China.CHEN Zhanheng 2018China Rare Earth Information2018,24,10:3
5China’s ion-adsorption rare earth resources, mining consequences and preservation显示文摘X. Jin Yang Aijun Lin Xiao-Liang Li Yiding Wu Wenbin Zhou Zhanheng Chen 2013Environmental Development2013,,:2
6Response improvement for In2O3-TiO2 thick film gas sensors 显示文摘Zhang Maolin Song Jianping Yuan Zhanheng 2012Curr Appl Phys2012,12,3:1
7Feature-based solid model reconstruction 显示文摘Wang Jun Gu Dongxiao Gao Zhanheng 2013Computing and Information Science in Engineering2013,13,1:1
8Controlling the morphology, size and phase of Nb_2O_5 crystals for high electrochemical performance显示文摘The morphology, size and phase of the material play a crucial role in its electrochemical performance.Herein, the nano-sized niobium pentoxide(Nb_2O_5) with different morphologies and phase structures are synthesized through a very simple thermal treatment method, including the pseudo hexagonal Nb_2O_5 nanosheets and pseudo hexagonal Nb_2O_5 nanoparticles, orthorhombic Nb_2O_5 nanoparticles. The synthesized pseudohexagonal Nb2O5 nanosheets and orthorhombic Nb_2O_5 nanoparticles exhibit better cycling and rate performance than the pseudohexagonal Nb2 O5 nanoparticles due to the different morphologies and phase structures. The T-Nb_2O_5-700 nanoparticles show the higher capacity(175 mAh/g) than that of TT-Nb_2O_5-500 nanosheets(127 mAh/g) and TT-Nb_2O_5-600 nanoparticles(39 mAh/g) at a current density of 50 mA/g and good rate performance with a capacity of 140 mAh/g at 1.0 A/g. The excellent rate capability and cycling stability of orthorhombic T-Nb_2O_5 may be ascribed to the dominant contribution of pseudocapacitive effect. This material has the great potential as a practical high-rate anode material for lithium-ion batteries.Jiaqin Liao Rou Tan Zhixiang Kuang Chunyu Cui Zengxi Wei Xiaolan Deng Zhanheng Yan Yuezhan Feng Fang Li Caiyun Wang Jianmin Ma 2018Chinese Chemical Letters2018,29,12:1
9Rare earth supply and demand in the post-WTO era显示文摘What is the post-WTO era?China became one member of WTO on 10 November 2001,followed by five years'transitional period.Post-WTO era should start from 2007 after the transition period.China began to issue mandatory production quotas on RE mineral products since 2006 and on RE smelting products since 2007,which was right in the era of the post-WTO.RE demand and supply situation in the post-WTO era is analyzed in this paper,based on current status quo of China's RE industry andChen Zhanheng 2013China Rare Earth Information2013,19,11:1
102013 NdFeB export analysis显示文摘China totally exported nearly 24,000 tonsof NdFeB products during 201 3,including 18,825 tons of permanent magnet,valued USD 1.34 billion at an average price of 71.4 USD/kg;3,277 tons of NdFeB magnetic powder,valued USD 1 01 million at an average price of 30.9 USD/kg;1,334 tons of strip casting ribbon,with total export value of USD 74million at an average price of 55.3 USD/kg;andChen Zhanheng 2014China Rare Earth Information2014,20,5:0
112013 rare earth price indeX and market trend显示文摘1.Rare earth price index changes The Association of China Rare Earth Industry has introduced Rare Earth Price Index(REPI)system to assess rare earth market.The system adopts sales volume and dealing price of 18kinds of rare earth oxides.The year 2010 is regarded as the base period and the base price index of rare earth is 100.Chart 1 showsChen Zhanheng 2014China Rare Earth Information2014,20,5:0
12China Import and Export of NdFeB products in 2019显示文摘Export Neodymium-iron-boron products include rare earth permanent magnets,neodymiumiron-boron(NdFeB)magnetic powder,other NdFeB alloys and rapid-solidified permanent magnets.China shipped 40700 tons or US$1.78 billion worth of NdFeB products in 2019,reflecting a 3.71% increase in volume but a 4.79% decreased year-on-year.The average price was US$43.69 per kilogram,an 8.20% decrease from 2018.Chen Zhanheng 2020China Rare Earth Information2020,26,3:0
13Report on Chinese rare earth import and export in 2019显示文摘1 Rare earth export In 2019,China totally exported 46,300 tons of rare earth in amount down 12.64%,and US$440 million in value,down 14.44%year-onyear(YoY).The average price of exported rare earth was US$9.5 per kilogram,fell by 2.06%Yo Y.In the total export,rare earth compounds takes the majority proportion with 39,500 tons,down 13.51%from the previous year,accounting for 85.31%,but its export value was US$440 million in value,down only 10.76%,that is to say,the average price increased by 3.17%YoY.Chen Zhanheng 2020China Rare Earth Information2020,26,2:0
14Analysis of 2015 Chinese rare earth export market显示文摘China's rare earth export policy changed greatly in 2015.Rare earth export quotas were cancelled in early January and export tariffs were put an end in early may.The cancellation of both export policies greatly stimulated rare earth export markets during 2015.China totally exported about 34,800 tons of rare earth products during 2015,up 25.62%year-on-year;export value reached about$373 million,up 0.24%year-on-year;average export price was$10.71 per kg,down 20.20%year-on-year.Chen Zhanheng Xu Peng 2016China Rare Earth Information2016,22,6:0
15Chinese import and export of rare earth products in China in 2020显示文摘1.Rare earth export China exported 35,400 tons rare earth products by weight in 2020,with a decrease of 23.49%,and amounted to US$344 million in value,a yearon-year decrease of 21.88%,and the average price of export products was US$9.70 per kg,fell by2.13%over the previous year.In the total export products,rare earth compounds were exported about 29,300 tons in volume,a year-on-year decrease of 25.90%;the export value was about US$263 million,down 18.84% at an average price of US$8.99 per kilogram,rising 9.55% compare to that of last year.Chen Zhanheng 2021China Rare Earth Information2021,27,1:0
16China import and export of NdFeB products in 2020显示文摘1.Export 1.1 Export quantity In 2020,China exported totally 40,800 tons of NdFeB products including rare earth permanent magnets,NdFeB magnetic powder,other NdFeB alloys and permanent magnetic cast strip,with a year-on-year increase of 0.24 percent.The export value was 1.782 billion US dollars,a year-on-year increase of 0.14 percent.The average price was 43.65 US dollars per kilogram,with a year-on-year decrease of 0.10 percent.Chen Zhanheng 2021China Rare Earth Information2021,27,2:0
17Thermodynamic properties of LaCrO_3显示文摘The nano powders of LaCrO3 were prepared by a sol-gel route. The heat capacity of LaCrO3 nano powders from 350 to 550 K was measured by DSC method and expressed as: Cp (LaCrO3) (±0.112) = 166.844 – 8.500 × 103T – 1.022 × 106T 2 (J/(mol?K)) (350-550 K). An EMF measurement assembly was developed with CaF2 as an electrolyte for the gal- vanic cell. From measured EMF data of the reversible cell, () Pt, La2O3, LaF3, O2 (1 atm)|CaF2|O2(1 atm), LaF3, LaCrO3, Cr2O3, Pt(+), and the relevant value of Gibbs free energy, the Gibbs free energy of formation of LaCrO3 was calculated from 700 to 885 K: G fΟ,L aCrO3= 1555.364 + 0.354T (kJ/mol) (700-885 K). And the Gibbs free energy change of reaction from simple oxides La2O3 and Cr2O3 was calculated to be: G fΟ,o x(LaCrO3)= ?94.758 + 8.530 × 102T (kJ/mol) (700-885 K).CHEN Zhanheng XING Xianran YUAN Wenxia HUANG Xiaowei LI Hongwei 2006Rare Metals2006,25,5:0
18In silico prediction methods of self-interacting proteins:an empirical and academic survey显示文摘In silico prediction of self-interacting proteins(SIPs)has become an important part of proteomics.There is an urgent need to develop effective and reliable prediction methods to overcome the disadvantage of high cost and labor intensive in traditional biological wet-lab experiments.The goal of our survey is to sum up a comprehensive overview of the recent literature with the computational SIPs prediction,to provide important references for actual work in the future.In this review,we first describe the data required for the task of DTIs prediction.Then,some interesting feature extraction methods and computational models are presented on this topic in a timely manner.Afterwards,an empirical comparison is performed to demonstrate the prediction performance of some classifiers under different feature extraction and encoding schemes.Overall,we conclude and highlight potential methods for further enhancement of SIPs prediction performance as well as related research directions.Zhanheng CHEN Zhuhong YOU Qinhu ZHANG Zhenhao GUO Siguo WANG Yanbin WANG 2023Frontiers of Computer Science2023,17,3:0
19Some thoughts on development of China rare earth industry and scientific technology显示文摘Ⅰ.Media background'Rare earth'has become a hot topic globally since 2009.The Times of UK published an article entitled 'China takes charge of keys to technologies' future 'on 9th March 2009,in which China was considered to have become the largest monopoly country on rare earth metals' supply and the leading position would make China control the future of consumer electronic products and green technology.Triggered by the article,more and more attentions were paid to'China rare earth'by media inside and outside China.Chen Zhanheng 2011China Rare Earth Information2011,17,3:0
20A survey of current trends in computational predictions of protein-protein interactions显示文摘Proteomics become an important research area of interests in life science after the completion of the human genome project.This scientific is to study the characteristics of proteins at the large-scale data level,and then gain a holistic and comprehensive understanding of the process of disease occurrence and cell metabolism at the protein level.A key issue in proteomics is how to efficiently analyze the massive amounts of protein data produced by high-throughput technologies.Computational technologies with low-cost and short-cycle are becoming the preferred methods for solving some important problems in post-genome era,such as protein-protein interactions(PPIs).In this review,we focus on computational methods for PPIs detection and show recent advancements in this critical area from multiple aspects.First,we analyze in detail the several challenges for computational methods for predicting PPIs and summarize the available PPIs data sources.Second,we describe the state-of-the-art computational methods recently proposed on this topic.Finally,we discuss some important technologies that can promote the prediction of PPI and the development of computational proteomics.Yanbin WANG Zhuhong YOU Liping LI Zhanheng CHEN 2020Frontiers of Computer Science2020,14,4:0
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