化工新型材料

化工新型材料 ›› 2019, Vol. 47 ›› Issue (3) : 99-103.

新材料与新技术

高容量锂离子电池负极材料ZnMn₂O₄/Fe₂O₃的制备

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Synthesis of ZnMn₂O₄/Fe₂O₃ high-capacity cathode of lithium-ion battery

Yu Hongjun, Chu Hairong, Zhang Yuhuan ,Bei Fengli ,Pan Feng

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摘要

采用简单的溶剂热法合成了纯相锰酸锌(ZnMn₂O₄),通过原位生长和共生长两种方式将ZnMn₂O₄负载在多面体Fe₂O₃上,形成ZnMn₂O₄/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ZnMn₂O₄充放电时较大的体积变化,抑制ZnMn₂O₄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ZnMn₂O₄以及商用碳负极。

Abstract

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.Fe₂O₃ 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 as 1852mAh/g and remained at a high level of 1197mAh/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

Key words

solvothermal method / zinc manganate / ferric oxide / electrochemistry

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高容量锂离子电池负极材料ZnMn₂O₄/Fe₂O₃的制备[J]. 化工新型材料, 2019, 47(3): 99-103 DOI:

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