摘要
通过阴离子置换反应制备出具有核壳结构的米粒状FeS_(2)/C纳米材料。所制备材料具有较高的离子和电子电导,优异的电解液浸润特性,以及缓冲材料体积变化的能力。在作为锂离子电池负极材料时,FeS_(2)/C电极具有较高的可逆比容量以及优秀的倍率性能,100 mA·g^(−1)电流密度下可逆比容量高达1100 mA·h·g^(−1),在2 A·g^(−1)的大电流密度下,依然有866 mA·h·g^(−1)可逆比容量。研究结果为其他核壳材料的制备提供了新的思路和方法。
The rice grain-like FeS2/C nanomaterial with core-shell structure was prepared by anion displacement reaction.The prepared composite shows enhanced inoic and electronic conductivity,excellent electrolyte infiltration characteristics,and capability of buffering the volume change.When evaluated as anode of lithium ion batteries,the FeS2/C electrodes exhibit high reversible capacity of 1100 mA·h·g^(−1) at 100 mA·g^(−1) and outstanding rate capability.Even at high current density of 2 A·g^(−1),a reversible capacity of 866 mA·h·g−1 can be achieved.The results in this paper provide new ideas and methods for the preparation of other core-shell materials.
作者
夏青
徐宇兴
周运成
纪雪倩
冯海兰
王鹏飞
谭强强
XIA Qing;XU Yuxing;ZHOU Yuncheng;JI Xueqian;FENG Hailan;WANG Pengfei;TAN Qiangqiang(State Key Laboratory of Multiphase Complex Systems,Institute of Process Engineering,Chinese Academy of Sciences,Beijing 100190,China;Zhongke Langfang Institute of Process Engineering,Langfang Economic&Technical Development Zone,Langfang 065001,Hebei,China;Innovation Academy for Green Manufacture,Chinese Academy of Sciences,Beijing 100190,China;Hebei Technology Innovation Center of Advanced Energy Materials,Langfang 065001,Hebei,China)
出处
《化工学报》
EI
CAS
CSCD
北大核心
2021年第5期2849-2856,共8页
CIESC Journal
基金
河北省自然科学基金项目(E2019103017,E2019103018)
国家自然科学基金项目(51902310)
河北省重点研发计划项目(19214407D)。
关键词
锂离子电池
二硫化铁
核壳结构
纳米材料
复合材料
电化学
lithium ion batteries
iron disulfide
core-shell structure
nanomaterials
composites
electrochemistry
