摘要
通过前驱体MIL-88热解制备出具有碳壳包覆的纺锤状Fe_(2)O_(3)纳米粒子(Fe_(2)O_(3)@C)。当用来作为锂离子电池的负极材料时,这种具有碳包覆的Fe_(2)O_(3)纳米粒子不仅可以促进电极与电解液的接触、调节循环测试所引起的体积变化,而且可以提高电极的导电性。得益于这种独特的碳包覆的框架结构,该复合材料展示出1350 mAh/g的高首次放电比容量,以及优异的循环性能(循环100圈后得到800 mAh/g的可逆比容量)和倍率性能。
Carbon-coated Fe_(2)O_(3)(Fe_(2)O_(3)@C)nanospindles are synthesized by the pyrolysis of MIL-88 precursor.When used as the anode for lithium-ion batteries,this kind of Fe_(2)O_(3)@C nanospindles materials can not only promote the contact between the anode and electrolyte,and accommodate the volume change during the cycling,but also improve the conductivity of the based materials.Benefiting from the unique carbon-coated framework structure,the Fe_(2)O_(3)@C nanospindles materials present a high initial discharge specific capacity of 1350 mAh/g,and exhibit an excellent cycling performance(the reversible specific capacity of 800 mAh/g after 100 cycles)and an outstanding rate stability.
作者
胡宪伟
田义凡
文佳
HU Xianwei;TIAN Yifan;WEN Jia(School of Metallurgy, Northeastern University, Shenyang 410083, China;Key Laboratory for Ecological Metallurgy of Multimetallic Mineral (Ministry of Education),Northeastern University, Shenyang 410083, China)
出处
《功能材料》
CAS
CSCD
北大核心
2021年第7期7137-7142,共6页
Journal of Functional Materials
基金
国家自然科学基金面上资助项目(51974081)
辽宁省自然科学基金面上资助项目(2019-MS-129)。
