摘要
采用简单的溶剂热法合成了纯相锰酸锌(ZnMn_2O_4),通过原位生长和共生长两种方式将ZnMn_2O_4负载在多面体Fe2O3上,形成ZnMn_2O_4/Fe2O3复合负极材料。Fe2O3相当于一个机械性能良好的载体,可以缓冲ZnMn_2O_4充放电时较大的体积变化,抑制ZnMn_2O_4的团聚,缩短了锂离子扩散距离,从而获得了稳定、高性能的锂离子电池负极材料。首次放电比容量高达1852mAh/g,经过50次循环后仍保持1197mAh/g的高水平,远高于纯ZnMn_2O_4以及商用碳负极。
Zinc manganate(ZnMn2O4)was synthesized by simple solvothermal method,ZnMn2O4/Fe2O3 composite cathode material was formed on the ferric oxide(Fe2O3)by growth in situ and co-growth.Fe2 O3 was equivalent to a strong mechanical carrier,which can buffer the large volume change of ZnMn2O4 during charge and discharge processes,inhibited the agglomeration of ZnMn2O4,shorten the diffusion distance of lithium ion,and obtained a stable and high performance of cathode material for lithium ion batteries.The first discharge capacity was as high as1852 mAh/g and remained at a high level of 1197 mAh/g after 50 cycles,much higher than that of pure ZnMn2O4 and commercial carbon cathode materials.
作者
于洪珺
储海蓉
张玉环
卑凤利
潘峰
Yu Hongjun;Chu Hairong;Zhang Yuhuan;Bei Fengli;Pan Feng(College of Chemical Engineering,Nanjing University of Science and Technology,Nanjing 210094)
出处
《化工新型材料》
CAS
CSCD
北大核心
2019年第3期99-103,共5页
New Chemical Materials
基金
国家自然科学基金(51472119)
江苏高校优势学科建设工程资助项目(21474053)
关键词
溶剂热法
锰酸锌
FE2O3
电化学
solvothermal method
zinc manganate
ferric oxide
electrochemistry
