检索结果-南通市图书馆

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

原位透射解析增强界面实现“厚密”硅负极

Science Bulletin 2020年第18期65卷 1563-1569,M0004页

作者：韩俊伟汤代明孔德斌陈凡奇肖菁赵子云潘思远吴士超杨全红 Nanoyang Group State Key Laboratory of Chemical EngineeringSchool of Chemical Engineering and TechnologyCollaborative Innovation Center of Chemical Science and Engineering(Tianjin)Tianjin UniversityTianjin 300350China International Center for Materials Nanoarchitectonics(WPI-MANA) National Institute for Materials Science(NIMS)Namiki 1-1Tsukubalbaraki 305-0044Japan CAS Key Laboratory of Nanosystem and Hierarchical Fabrication CAS Center for Excellence in NanoscienceNational Center for Nanoscience and TechnologyBeijing 100190China Joint School of National University of Singapore and Tianjin University International Campus of Tianjin UniversityBinhai New CityFuzhou 350207China

为提高锂离子电池的体积能量密度,电极的密度和厚度需要尽可能提高,以降低非活性组分在整个电池中的体积占比.但是,电极密度与厚度的增加,对电极,特别是对高容量硅负极循环过程中的力学稳定性提出了巨大的挑战.本工作针对硅碳复合电极材... 详细信息

为提高锂离子电池的体积能量密度,电极的密度和厚度需要尽可能提高,以降低非活性组分在整个电池中的体积占比.但是,电极密度与厚度的增加,对电极,特别是对高容量硅负极循环过程中的力学稳定性提出了巨大的挑战.本工作针对硅碳复合电极材料,通过碳/硅界面的强化设计,实现"厚密"硅负极构建.利用可流动的硫模板法实现碳网络可控收缩,为硅纳米颗粒的定制限域碳笼,并辅以聚多巴胺界面修饰,以提高硅碳界面结合作用,最终获得增强界面的碳笼缓冲结构.进一步地,基于原位透射电子显微镜技术的平面压缩、垂直剪切等力学测试,以及力学-电化学耦合表征等解析硅碳增强界面对嵌锂膨胀硅纳米颗粒所发挥的力学缓冲作用.最终,基于此硅碳复合材料,获得具有高体积比容量和高面容量、稳定循环的"厚密"硅负极.

关键词： Lithium-ion battery silicon anode Interface stability In situ TEM Dense and thick electrodes

A hydrophilic poly(methyl vinyl ether-alt-maleic acid) polymer as a green, universal, and dual-functional binder for high-performance silicon anode and sulfur cathode

在线全文

学校读者我要写书评

暂无评论

Journal of Energy Chemistry 2021年第11期30卷 127-135,I0003页

作者： Hao Chen Zhenzhen Wu Zhong Su Luke Hencz Su Chen Cheng Yan Shanqing Zhang Centre for Clean Environment and Energy School of Environment and ScienceGold Coast CampusGriffith UniversityGold CoastQueensland 4222Australia School of Mechanical Medical&Process EngineeringQueensland University of Technology(QUT)BrisbaneQueensland 4000Australia

Binders could play crucial or even decisive roles in the fabrication of low-cost, stable and high-capacity electrodes. This is especially the case for the silicon (Si) anodes and sulfur (S) cathodes that undergo large volume change and active material loss in lithium-ion batteries during prolonged cycles. Herein, a hydrophilic polymer poly(methyl vinyl ether-alt-maleic acid) (PMVEMA) was explored as a dual-functional aqueous binder for the preparation of high-performance silicon anode and sulfur cathode. Benefiting from the dual functions of PMVEMA, i.e., the excellent dispersion ability and strong binding forces, the as-prepared electrodes exhibit improved capacity, rate capability and long-term cycling performance. In particular, the as-prepared Si electrode delivers a high initial discharge capacity of 1346.5 mAh g^(−1) at a high rate of 8.4 A/g and maintains 834.5 mAh g^(−1) after 300 cycles at 4.2 A/g, while the as-prepared S cathode exhibits enhanced cycling performance with high remaining discharge capacities of 663.4 mAh g^(−1) after 100 cycles at 0.2 C and 487.07 mAh g^(−1) after 300 cycles at 1 C, respectively. These encouraging results suggest that PMVEMA could be a universal binder to facilitate the green manufacture of both anode and cathode for high-capacity energy storage systems.

关键词： Dual-functional Aqueous binder silicon anode Sulfur cathode Lithium-ion batteries Lithium-sulfur batteries

Stress-dissipated conductive polymer binders for high-stability silicon anode in lithium-ion batteries

在线全文

学校读者我要写书评

暂无评论

Journal of Materiomics 2023年第2期9卷 378-386页

作者： Zhong Xu Xiang Chu Keli Wang Haitao Zhang Zhongqian He Yanting Xie Weiqing Yang Key Laboratory of Advanced Technologies of Materials(Ministry of Education) School of Material Science and EngineeringSouthwest Jiaotong UniversityChengdu610031China College of Physics Sichuan UniversityChengdu641500China State Key Laboratory of Traction Power Southwest Jiaotong UniversityChengdu610031China

silicon-based anodes with high theoretical capacity have intriguing potential applications for high energy density lithium-ion batteries(LIBs),while suffer from immense volumetric change and brittle solidstate electrolyte interface that causes collapse of electrodes.Here,a stress-dissipated conductive polymer binder(polyaniline with citric acid,PC)is developed to enhance the mechanical electrochemical performance between Si nanoparticles(SiNPs)and binders.Benefiting from the stable triangle network node of citric acid and a considerable distributed of hydroxyl groups,the PC binder can effectively dissipate the stress from SiNPs,thus providing an excellent cyclic stability of Si anodes.Both experimental results and theoretical calculation demonstrate the enhanced adhesion between binders and SiNPs could bond the particles tightly to form a robust electrode.The as-fabricated Si anode exhibits outstanding structural stability upon long-term cycles that exhibit a highly reversible capability of 1021 mA·h·g^(-1)over 500 cycles at a current density of 0.5 C(1 C¼4200mA·g^(-1)).Evidently,this stressdissipated binder design will provide a promising route to achieve long-life Si-based LIBs.

关键词： Conductive polymer silicon anode Binder Mechanical electrochemistry Lithium-ion batteries

Correlation between the physical parameters and the electrochemical performance of a silicon anode in lithium-ion batteries

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Materiomics 2019年第2期5卷 164-175页

作者： Guobin Zhu Yan Wang Siming Yang Qunting Qu Honghe Zheng College of Energy&Collaborative Innovation Center of Suzhou Nano Science and Technology Soochow UniversitySuzhouJiangsu215006PR China

Lithium-ion battery anode used as silicon particles were obtained from different major suppliers,and they were characterized by different spectroscopic techniques and evaluated by electrochemical experiments.Correlations between the key physical parameters and electrochemical properties of the silicon particles were investigated.silicon particle size,surface oxygen content,-OH content and physical appearance are found to strongly influence the electrochemical properties of the Si anode.The particle size of 100 nm has great promise for the practical application of Si nanoparticles in the lithium-ion battery industry.An inverse correlation between the oxygen content and the reversible capacity or first coulombic efficiency was obtained.The-OH content by surface treatment contributes to enhanced cycling stability by the improved affinity between the Si particle and the water-soluble binder.Spherical Si particles perform better compared to irregular particles,and agglomeration dramatically decreases the cycling stability of the Si anode.Among the investigated Si particles,the sample that exhibited a reversible capacity of more than 2500 mAh g^(-1),a first coulombic efficiency of 89.26%and an excellent cycling stability,has great potential for use in the battery industry.

关键词： Lithium ionbatteries silicon anode Physical parameters Particle size Surface condition

Monothetic and conductive network and mechanical stress releasing layer on micron-silicon anode enabling high-energy solid-state battery

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Rare Metals 2024年第3期43卷 1017-1029页

作者： Xiang Han Min Xu Lan-Hui Gu Chao-Fei Lan Min-Feng Chen Jun-Jie Lu Bi-Fu Sheng Peng Wang Song-Yan Chen Ji-Zhang Chen College of Materials Science and Engineering Co-Innovation Center of Efficient Processing and Utilization of Forestry ResourcesNanjing Forestry University Department of Physics Xiamen University Western Digital Corporation

silicon has ultrahigh capacity,dendrite-free alloy lithiation mechanism and low cost and has been regarded as a promising anode candidate for solid-state battery.Owing to the low infiltration of solid-state electrolyte(SSE),not the unstable solid-electrolyte interphase(SEI),but the huge stress during lithiation-and delithiation-induced particle fracture and conductivity lost tend to be the main issues.In this study,starting with micron-Si,a novel monothetic carbon conductive framework and a MgO coating layer are designed,which serve as electron pathway across the whole electrode and stress releasing layer,respectively.In addition,the in situ reaction between Si and SSE helps to form a LiF-rich and mechanically stable SEI layer.As a result,the mechanical stability and charge transfer kinetics of the uniquely designed Si anode are significantly improved.Consequently,high initial Coulombic efficiency,high capacity and durable cycling stability can be achieved by applying the Si@MgO@C anode in SSB.For example,high specific capacity of 3224.6 mAh·g-1and long cycling durability of 200 cycles are achieved.This work provides a new concept for designing alloy-type anode that combines surface coating on particle and electrode structure design.

关键词： Lithium-ion battery (LIB) Solid-state electrolyte (SSE) silicon anode Stress relief Coating

Low‐temperature synthesis of graphitic carbon‐coated silicon anode materials

在线全文

学校读者我要写书评

暂无评论

Carbon Energy 2019年第2期1卷 246-252页

作者： Zheng Yan Huile Jin Juchen Guo Department of Chemical and Environmental Engineering University of California‐RiversideRiversideCalifornia College of Chemistry and Materials Engineering Wenzhou UniversityWenzhouChina

We report the synthesis of a high‐performance graphitic carbon‐coated silicon(Si@GC)composite material for lithium‐ion batteries via a scalable production route.Porous Si is produced from the magnesiothermic reduction of commercial silica(SiO2)precursor followed by low‐temperature graphitic carbon coating using glucose as the precursor.The obtained Si@GC composite achieves an excellent reversible specific capacity of 1195 mAh g−1 and outstanding cycle stability.The thick Si@GC anode(3.4 mg cm^−2)in full cells with commercial lithium iron phosphate cathode delivers a remarkable performance of 800 mAh g^−1 specific capacity and 2.7 mAh cm^−2 areal capacity as well as 93.6%capacity retention after 200 cycles.

关键词： glucose graphitic carbon Li‐ion batteries silicon anode

A review of existing and emerging binders for silicon anodic Li-ion batteries

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Nano Research 2023年第5期16卷 6736-6752页

作者： Yanxiu Liu Rong Shao Ruiyu Jiang Xinyu Song Zhong Jin Lin Sun Key Laboratory for Advanced Technology in Environmental Protection of Jiangsu Province School of Chemistry and Chemical EngineeringYancheng Institute of TechnologyYancheng 224051China State Key Laboratory of Coordination Chemistry MOE Key Laboratory of Mesoscopic ChmistryMOE Key laboratory of High Performance Polymer Materials and TechnologyJiangsu Key laboratory of Advanced Organic MaterialsSchool of Chemistry and Chemical EngineeringNanjing UniversityNanjing 210023China

silicon anodes have been extensively studied as a potential alternative to graphite ones for Li-ion batteries.However,their commercial application is limited by the issues of the poor structural and interfacial stability.In this regard,one of the key strategies for fully exploiting the capacity potential of Si-based anodes is to design robust conductive binder networks.Although the amount of binder in the electrode is small,it is,however,considered as a critical component of Si-based anodes for Li-ion batteries.In this review,a brief summary is given from the structural and functional aspects of the existing binders for Si anodes.In particular,three-dimensional and multifunctional polymeric binders with excellent electrical conductivity,flexibility,adhesion prepared by chemical bonding,electrostatic and coordination interactions have become the focus of research,are expected to accelerate the practical application of silicon anodes.Lastly,some suggestions for the future development of Si anodic binders are put forward.

关键词： lithium ion battery silicon anode binder design interface cycle stability

Boron heteroatom-doped silicon-carbon peanut-like composites enables long life lithium-ion batteries

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Rare Metals 2022年第4期41卷 1276-1283页

作者： Fang-Zhou Zhang Yuan-Yuan Ma Miao-Miao Jiang Wei Luo Jian-Ping Yang State Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of Materials Science and EngineeringDonghua UniversityShanghai 201620China

Carbon coated Si core–shell structures have been proposed to solve the adverse effects of Si-based anode.However,designing ideal core–shell architecture with excellent surface and interface properties is still a significant challenge.Herein,a novel peanut-like structure of B-doped silicon/carbon nanoparticle(Si@B-C)synthe-sized by sol–gel process and subsequent thermal reduction is reported.The peanut-like Si@B-C electrode demon-strates a superior cyclability of 534 mAh·g^(-1)after 1000 cycles at high current density of 1000 mA·g^(-1).The exceptional electrochemical performance is attributed to the boric acid-induced highly interconnected peanut-like structure and boron heteroatom framework could provide a continuous electron pathway to reduce the irreversible lithium ion loss during rapid cycling.This work provides insight into the development of the heteroatom-doped Si-based anodes with stable cycling performance for LIBs.

关键词： Lithium-ion battery silicon anode Peanutlike structure Boron doping Long cycle life

Ni-P-SBR composite-electroless-plating enables Si anode with high conductivity and elasticity for high performance Li-ion batteries application

在线全文

学校读者我要写书评

暂无评论

Journal of Energy Chemistry 2023年第1期76卷 59-66,I0003页

作者： Yuxiao Wang Jian Gou Hongzhang Zhang Xiaofei Yang Huamin Zhang Xianfeng Li Dalian Institute of Chemical Physics Chinese Academy of SciencesDalian 116023LiaoningChina University of Chinese Academy of Sciences Beijing 100039China

Silica-based anode is widely employed for high energy density Li-ion batteries owing to their high theoretical specific capacity(4200 m A h g-1).However,it is always accompanied by a huge volume expansion(300%)and shrinks during the lithiation/delithiation process,further leading to low cycle stability.Efforts to mitigate the adverse effects caused by volume expansion such as robust binder matrix,Coreshell structure,etc.,inevitably affect the electronic conductivity within the electrode.Herein,a high conductivity and elasticity Si anode(Ni-P-SBR(styrene-butadiene rubber)@Si)was designed and fabricated via the Ni-P-SBR composite-electroless-plating process.In this design,the Si particles are surrounded by SBR polymer and Ni particles,where the SBR can adapt to the volume change and Ni particles can provide the electrode with high electronic conductivity.Therefore,the Ni-P-SBR@Si delivers a high initial capacity of 3470 m A h g-1and presents capacity retention of 49.4%within 200 cycles at 600 m A g-1.Additionally,a high capacity of 1153 m A h g-1can be achieved at 2000 m A g-1and can be cycled stably under bending conditions.This strategy provides feasible ideas to solve the key issues that limit the practical application of Si anodes.

关键词： silicon anode Volume expansion Composite-electroless-plating High elasticity High electronic conductivity