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| 1 | High-performance LiNi_(0.8)Mn_(0.1)Co_(0.1)O_(2) cathode by nanoscale lithium sulfide coating via atomic layer deposition显示文摘The commercialization of nickel-rich LiNi_(0.8)Mn_(0.1)Co_(0.1)O_(2)(NMC811) has been hindered by its continuous loss of practical capacity and reduction in average working voltage.To address these issues,surface modification has been well-recognized as an effective strategy.Different from the coatings reported in literature to date,in this work,we for the first time report a sulfide coating,amorphous Li_(2)S via atomic layer deposition (ALD).Our study revealed that the conformal nano-Li_(2)S coating shows exceptional protection over the NMC811 cathodes,accounting for the dramatically boosted capacity retention from~11.6%to~71%and the evidently mitigated voltage reduction from 0.39 to 0.18 V after 500 charge–discharge cycles.In addition,the Li_(2)S coating remarkably improved the rate capability of the NMC811 cathode.Our investigation further revealed that all these beneficial effects of the ALD-deposited nano-Li_(2)S coating lie in the following aspects:(i) maintain the mechanical integrity of the NMC811 electrode:(ii) stabilize the NMC electrode/electrolyte interface:and (iii) suppress the irreversible phase transition of NMC structure.Particularly,this study also has revealed that the nano-Li_(2)S coating has played some unique role not associated with traditional non-sulfide coatings such as oxides.In this regard,we disclosed that the Li_(2)S layer has reacted with the released O_(2) from the NMC lattices,and thereby has dramatically mitigated electrolyte oxidation and electrode corrosion.Thus,this study is significant and has demonstrated that sulfides may be an important class of coating materials to tackle the issues of NMCs and other layered cathodes in lithium batteries. | Xin Wang Jiyu Cai Yang Ren Mourad Benamara Xinwei Zhou Yan Li Zonghai Chen Hua Zhou Xianghui Xiao Yuzi Liu Xiangbo Meng | 2022 | Journal of Energy Chemistry2022，31，6： | 1 |
| 2 | Atomic-scale tuned interface of nickel-rich cathode for enhanced electrochemical performance in lithium-ion batteries显示文摘The Ni-rich layered LiNi_(0.6)Mn_(0.2)Co_(0.2)O_(2)(NMC622)is one promising cathode for lithium-ion batteries(LIBs),but suffers from poor cycling stability under high cutoff potentials.The performance degradation was reflected as capacity fading and voltage drop,having their roots in instable interface of NMC622.Aimed at improving interfacial stability,in this study,we deposited nanoscale ZrO_(2) coatings conformally over NMC622 cathodes using atomic layer deposition(ALD).We found that,under a high cutoff voltage(4.5 V),the ALD ZrO_(2) coatings evidently improved the performance of NMC622 cathode,showing better cyclability and higher sustainable capacity.In addition,the ALD coatings dramatically boosted the rate capability of NMC622.All these compelling performance results are ascribed to the atomic-scale tunable ZrO_(2) coatings via ALD,which create stable interface and thereby inhibit unfavorable evolutions.In the study,we utilize a suite of characterization tools and various analyses to clarify the effects of ALD ZrO_(2) coatings.This study will be helpful for improving the performance of nickel-rich cathodes via interfacial engineering using ALD. | Yongqiang Liu Xin Wang Jiyu Cai Xiaoxiao Han Dongsheng Geng Jianlin Li Xiangbo Meng | 2020 | Journal of Materials Science & Technology2020，54，19： | 1 |
| 3 | Do methylenetetrahydrofolate dehydrogenase, cyclohydrolase, and formyltetrahydrofolate synthetase 1 polymorphisms modify changes in intelligence of school-age children in areas of endemic fluorosis?显示文摘Background: Excessive exposure to fluoride can reduce intelligence. Methylenetetrahydrofolate dehydrogenase, cyclohydrolase, and formyltetrahydrofolate synthetase 1 (MTHFD1) polymorphisms have important roles in neurodevelopment. However, the association ofMTHFD1 polymorphisms with children’s intelligence changes in endemic fluorosis areas has been rarely explored.Methods: A cross-sectional study was conducted in four randomly selected primary schools in Tongxu County, Henan Province, from April to May in 2017. A total of 694 children aged 8 to 12 years were included in the study with the recruitment by the cluster sampling method. Urinary fluoride (UF) and urinary creatinine were separately determined using the fluoride ion-selective electrode and creatinine assay kit. Children were classified as the high fluoride group and control group according to the median of urinary creatinine-adjusted urinary fluoride (UFCr) level. Four loci ofMTHFD1 were genotyped, and the Combined Raven’s Test was used to evaluate children’s intelligence quotient (IQ). Generalized linear model and multinomial logistic regression model were performed to analyze the associations between children’s UFCr level,MTHFD1 polymorphisms, and intelligence. The general linear model was used to explore the effects of gene-environment and gene-gene interaction on intelligence.Results: In the high fluoride group, children’s IQ scores decreased by 2.502 when the UFCr level increased by 1.0 mg/L (β= –2.502, 95% confidence interval [CI]: –4.411, –0.593), and the possibility for having 'excellent' intelligence decreased by 46.3% (odds ratio = 0.537, 95% CI: 0.290, 0.994). Children with the GG genotype showed increased IQ scores than those with the AA genotype of rs11627387 locus in the high fluoride group (P < 0.05). Interactions between fluoride exposure andMTHFD1 polymorphisms on intelligence were observed (Pinteraction < 0.05).Conclusion: Our findings suggest that excessive fluoride exposure may have adverse effects on children’s intelligence, and changes in children’s intelligence may be associated with the interaction between fluoride andMTHFD1 polymorphisms. | Zichen Feng Ning An Fangfang Yu Jun Ma Na Li Yuhui Du Meng Guo Kaihong Xu Xiangbo Hou Zhiyuan Li Guoyu Zhou Yue Ba | 2022 | Chinese Medical Journal2022，，15： | 0 |
| 4 | Promoting osteointegration effect of Cu-alloyed titanium in ovariectomized rats显示文摘Osteoporosis is a common skeletal disease making patients be prone to the osteoporotic fracture.However,the clinical implants made of titanium and its alloys with a poor osseointegration need a long time for healing and easily to loosening.Thus,a new class of Cu-alloyed titanium(TiCu)alloys with excellent mechanical properties and bio-functionalization has been developed.In this study,the osteoporosis modeled rats were used to study the osteointegration effect and underlying mechanism of TiCu.The results showed that after implantation for 4 weeks,TiCu alloy could promote the reconstruction of vascular network around the implant by up-regulating vascular endothelial growth factor expression.After 8weeks,it could further promote the proliferation and differentiation of osteoblasts,mineralization and deposition of collagens,and then significantly increasing bone mineral density around the implant.In conclusion,TiCu alloy would enhance the fixation stability,accelerate the osteointegration,and thus reduce the risk of aseptic loosening during the long-term implantation in the osteoporosis environment.This study was the first to report the role and mechanism of a Cu-alloyed metal in promoting osteointegration in osteoporosis environment,which provides a new attractive support for the improvement of future clinical applications of Cu-alloyed antibacterial titanium alloys. | Xiyue Zhang Hui Liu Ling Li Cuishan Huang Xiangbo Meng Junzuo Liu Xueling Bai Ling Ren Xinluan Wang Ke Yang Ling Qin | 2022 | Regenerative Biomaterials2022，9，1： | 0 |
| 5 | Molecular Layer Deposition of Crosslinked Polymeric Lithicone for Superior Lithium Metal Anodes显示文摘In this work,we for the first time developed a novel lithium-containing crosslinked polymeric material,a lithicone that enables excellent protection effects over lithium(Li)metal anodes.This new lithicone was synthesized via an accurately controllable molecular layer deposition(MLD)process,in which lithium tert-butoxide(LTB)and glycerol(GL)were used as precursors.The resultant LiGL lithicone was analyzed using a suite of characterizations.Furthermore,we found that the LiGL thichicone could serve as an exceptional polymeric protection film over Li metal anodes.Our experimental data revealed that the Li electrodes coated by this LiGL lithicone can achieve a superior cycling stability,accounting for an extremely long cyclability of>13,600 Listripping/plating cycles and having no failures so far in Li/Li symmetric cells at a current density of 5 mA/cm^(2)and an areal capacity of 1 mAh/cm^(2).We found that,with a sufficient protection by this LiGL coating,Li electrodes could realize long-term stable cyclability with little formation of Li dendrites and solid electrolyte interphase.This novel LiGL represents a facile and effective solution to the existing issues of Li anodes and potentially paves a technically feasible route for lithium metal batteries. | Xiangbo Meng Kah Chun Lau Hua Zhou Sujan Kumar Ghosh Mourad Benamara Min Zou | 2021 | Energy Material Advances2021，，1： | 0 |
| 6 | Unveiling the parasitic-reaction-driven surface reconstruction in Ni-rich cathode and the electrochemical role of Li_(2)CO_(3)显示文摘Nickel-rich transition-metal oxides are widely regarded as promising cathode materials for high-energydensity lithium-ion batteries for emerging electric vehicles. However, achieving high energy density in Ni-rich cathodes is accompanied by substantial safety and cycle-life obstacles. The major issues of Ni-rich cathodes at high working potentials are originated from the unstable cathode-electrolyte interface, while the underlying mechanism of parasitic reactions towards surface reconstructions of cathode materials is not well understood. In this work, we controlled the Li_(2)CO_(3) impurity content on LiNi_(0.83)Mn_(0.1)Co_(0.07)O_(2) cathodes using air, tank-air, and O_(2) synthesis environments. Home-built high-precision leakage current and on-line electrochemical mass spectroscopy experiments verify that Li_(2)CO_(3) impurity is a significant promoter of parasitic reactions on Ni-rich cathodes. The rate of parasitic reactions is strongly correlated to Li_(2)CO_(3) content and severe performance deterioration of Ni83 cathodes.The post-mortem characterizations via high-resolution transition electron microscope and X-ray photoelectron spectroscopy depth profiles reveal that parasitic reactions promote more Ni reduction and O deficiency and even rock-salt phase transformation at the surface of cathode materials. Our observation suggests that surface reconstructions have a strong affiliation to parasitic reactions that create chemically acidic environment to etch away the lattice oxygen and offer the electrical charge to reduce the valence state of transition metal. Thus, this study advances our understanding on surface reconstructions of Nirich cathodes and prepares us for searching for rational strategies. | Jiyu Cai Zhenzhen Yang Xinwei Zhou Bingning Wang Ana Suzana Jianming Bai Chen Liao Yuzi Liu Yanbin Chen Shunlin Song Xuequan Zhang Li Wang Xiangming He Xiangbo Meng Niloofar Karami Baasit Ali Shaik Sulaiman Natasha A.Chernova Shailesh Upreti Brad Prevel Feng Wang Zonghai Chen | 2023 | Journal of Energy Chemistry2023，，10： | 0 |
| 7 | Room-temperature epitaxial growth of V_2O_3 films显示文摘Herein we report the room-temperature epitaxial growth of V2O3 films by laser molecule beam epitaxy. X-ray diffraction profiles show the room-temperature epitaxial V2O3 films orient in the [110] direction on α-Al2O3(0001) substrates. Atomic force microscopy measurements reveal that the ultra-smooth surfaces with root-mean-square surface roughness of 0.11 nm and 0.28 nm for 10-nm-thick and 35-nm-thick V+2O3 film, respectively. X-ray photoelectron spectroscopy results indicate the V3 oxidation state in the films. Typical metal-insulator transition is observed in films at about 135 K. The resistivities at 300 K are approximately 0.8 mΩ cm and 0.5 mΩ cm for 10-nm-thick and 35-nm-thick V2O3 film, respectively. | LIU XiangBo LU HuiBin HE Meng JIN KuiJuan YANG GuoZhen | 2014 | Science China(Physics,Mechanics & Astronomy)2014，57，10： | 0 |
| 8 | Article Preclinical evaluation of acute systemic toxicity of magnesium incorporated poly(lactic-co-glycolic acid)porous scaffolds by three-dimensional printing Jing显示文摘Biodegradable polymer scaffolds combined with bioactive components which accelerate osteogenesis and angiogenesis have promise for use in clinical bone defect repair.The preclinical acute toxicity evaluation is an essential assay of implantable biomaterials to assess the biosafety for accelerating clinical translation.We have successfully developed magnesium(Mg)particles and beta-tricalcium phosphate(β-TCP)for incorporation into poly(lactic-co-glycolic acid)(PLGA)porous composite scaffolds(PTM)using low-temperature rapid prototyping three-dimensional-printing technology.The PTM scaffolds have been fully evaluated and found to exhibit excellent osteogenic capacity for bone defect repair.The preclinical evaluation of acute systemic toxicities is essential and important for development of porous scaffolds to facilitate their clinical translation.In this study,acute systemic toxicity of the PTM scaffolds was evaluated in mice by intraperitoneal injection of the extract solutions of the scaffolds.PTM composite scaffolds with different Mg andβ-TCP content(denoted as PT5M,PT10M,and PT15M)were extracted with different tissue culture media,including normal saline,phosphate-buffered saline,and serum-free minimum essential medium,to create the extract solutions.The evaluation was carried out following the National Standard.The acute toxicity was fully evaluated through the collection of extensive data,including serum/organs ion concentration,fluorescence staining,and in vivo median lethal dose measurement.Mg in major organs(heart,liver,and lung),and Mg ion concentrations in serum of mice,after intraperitoneal injection of the extract solutions,were measured and showed that the extract solutions of PT15M caused significant elevation of serum Mg ion concentrations,which exceeded the safety threshold and led to the death of the mice.In contrast,the extract solutions of PT5M and PT10M scaffolds did not cause the death of the injected mice.The median lethal dose of Mg ions in vivo for mice was determined for the first time in this study to be 110.66 mg/kg,and the safety level of serum magnesium toxicity in mice is 5.4 mM,while the calcium serum safety level is determined as 3.4 mM.The study was approved by the Animal Care and Use Committee of Shenzhen Institute of Advanced Technology,Chinese Academy of Sciences(approval No.SIAT-IRB-170401-YGS-LYX-A0346)on April 5,2017.All these results showed that the Mg ion concentration of intraperitoneally-injected extract solutions was a determinant of mouse survival,and a high Mg ion concentration(more than 240 mM)was the pivotal factor contributing to the death of the mice,while changes in pH value showed a negligible effect.The comprehensive acute systemic toxicity evaluation for PTM porous composite scaffolds in this study provided a reference to guide the design and optimization of this composite scaffold and the results demonstrated the preclinical safety of the as-fabricated PTM scaffold with appropriate Mg content,strongly supporting the official registration process of the PTM scaffold as a medical device for clinical translation. | Jing Long Bin Teng Wei Zhang Long Li Ming Zhang Yingqi Chen Zhenyu Yao Xiangbo Meng Xinluan Wang Ling Qin Yuxiao Lai | 2021 | Biomaterials Translational2021，2，3： | 0 |
| 9 | Anti-inflammatory and anabolic biphasic scaffold facilitates osteochondral tissue regeneration in osteoarthritic joints显示文摘Osteochondral defects (OCD) are common but difficult to heal due to the low intrinsic repair capacity of cartilage and its complex hierarchical structure. In osteoarthritis (OA), OCD become more challenging to repair as both cartilage and subchondral bone regeneration are further impaired due to the arthritic environment. Numerous biomaterials have been developed and tested in osteochondral defects while ignoring the inflammatory environment. To target this challenging underlying pathophysiology, we designed and fabricated a biphasic porous and degradable scaffold incorporating anti-inflammatory and anabolic molecules by low-temperature rapid prototyping technology, and its effects on promoting osteochondral regeneration were evaluated using our well-established OA-OCD rabbit model. The biphasic porous scaffolds consisted of poly lactic-co-glycolic acid (PLGA) with kartogenin (KGN) for cartilage repair and PLGA and β-calcium phosphate (PLGA/β-TCP) with cinnamaldehyde (CIN) for subchondral bone repair. KGN is a molecule for promoting chondrogenesis and CIN is a phytomolecule for enhancing osteogenesis and alleviating inflammation. The biphasic scaffolds PLGA/KGN-PLGA/β-TCP/CIN (PK/PTC) with bio-mimic structure provided stable mechanical properties and exhibited excellent biocompatibility to support cell adhesion, proliferation, migration, and distribution. Furthermore, KGN and CIN within biphasic scaffolds could be released in a controlled and sustained mode, and the biphasic scaffold degraded slowly in vitro . Evaluating the repair of 16-weeks post-implantation into critically sized OA-OCD rabbit models revealed that the biphasic scaffold could promote subchondral bone and cartilage regeneration, as well as reverse subchondral osteosclerosis caused by inflammation in vivo . These findings support the utilization of the PK/PTC scaffold for osteochondral regeneration and provide a promising potential strategy for clinical application for the treatment of patients with OA-OCD. | Xiangbo Meng Ling Li Cuishan Huang Keda Shi Qingqiang Zeng Chunyi Wen Sibylle Grad Mauro Alini Ling Qin Xinluan Wang | 2023 | Journal of Materials Science & Technology2023，，25： | 0 |
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