高容量锂离子电池负极材料ZnMn_2O_4/Fe_2O_3的制备  

Synthesis of ZnMn_2O_4/Fe_2O_3 high-capacity cathode of lithium-ion battery

作　　者：于洪珺 储海蓉 张玉环 卑凤利[1] 潘峰[1] Yu Hongjun;Chu Hairong;Zhang Yuhuan;Bei Fengli;Pan Feng(College of Chemical Engineering,Nanjing University of Science and Technology,Nanjing 210094)

机构地区：[1]南京理工大学化工学院,南京210094

出　　处：《化工新型材料》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)

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.

关 键 词：溶剂热法 锰酸锌 FE2O3 电化学 

分 类 号：TM912[电气工程—电力电子与电力传动]