钼掺杂提升无钴高镍LiNi0.9Mn0.1O2正极材料倍率性能和循环稳定性研究

马静涛, 李聪, 李阿飞, 胡成志, 陈章贤*

化工新型材料 ›› 2023, Vol. 51 ›› Issue (7) : 121 -126.

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化工新型材料 ›› 2023, Vol. 51 ›› Issue (7) : 121-126. DOI: 10.19817/j.cnki.issn1006-3536.2023.07.022
新材料与新技术

钼掺杂提升无钴高镍LiNi0.9Mn0.1O2正极材料倍率性能和循环稳定性研究

    马静涛, 李聪, 李阿飞, 胡成志, 陈章贤*
作者信息 +

The improvement of rate performance and cycle stability of cobalt-free Ni-rich LiNi0.9Mn0.1O2 cathode material by molybdenum doping

  • Ma Jingtao, Li Cong, Li Afei, Hu Chengzhi, Chen Zhangxian
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文章历史 +
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摘要

由于钴价格的不稳定,无钴高镍LiNi0.9Mn0.1O2被认为是未来有潜力的正极材料,但是倍率性能弱和循环寿命短的问题阻碍了其商业化。通过Mo元素对无钴高镍LiNi0.9Mn0.1O2正极材料进行掺杂改性,延缓材料在充电阶段的有害相变,进而提升材料的倍率性能和循环稳定性。在1C倍率下,循环500圈后有着73.3%的容量保持率;即使在10C的高倍率下,依然有着152.05mAh/g的高放电容量。本研究为用于电动汽车的锂离子正极材料提供了新的选择。

Abstract

Due to the instability of cobalt price,cobalt-free Ni-rich LiNi0.9Mn0.1O2 is considered as a potential cathode material in the future,but the problems of weak rate capability and short cycle life hinder its commercialization.In this study,the cobalt-free nickel-rich LiNi0.9Mn0.1O2 cathode material was modified by doping with Mo element,which could delay the harmful phase transition of the material during the charging stage,thereby improving the rate performance and cycle stability of the material.At a rate of 1C,it had a capacity retention rate of 73.3% after 500 cycles,and even at a high rate of 10C,it still had a high discharge capacity of 152.05mAh·g-1.This study provided new options for lithium-ion cathode materials for electric vehicles.

关键词

无钴 / 钼掺杂 / 锂离子电池 / 高镍 / 正极材料

Key words

cobalt-free / molybdenum doping / lithium-ion battery / Ni-rich / cathode material

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钼掺杂提升无钴高镍LiNi0.9Mn0.1O2正极材料倍率性能和循环稳定性研究[J]. 化工新型材料, 2023, 51(7): 121-126 DOI:10.19817/j.cnki.issn1006-3536.2023.07.022

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