Cation-doped LiNi0.8Co0.1Mn0.1O2 cathode with high rate performance

Long Zhang; Dongsheng Yang; Lilei Miao; Chunmeng Zhang; Jiexiang Li; Jiawei Wen; Chunxia Wang; Tiantian Cao; Guoyong Huang; Shengming Xu

doi:10.1016/j.cjche.2024.02.009

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Cation-doped LiNi_0.8Co_0.1Mn_0.1O₂ cathode with high rate performance

Updated：2026-01-06

- Cation-doped LiNi_0.8Co_0.1Mn_0.1O₂ cathode with high rate performance
- Chinese Journal of Chemical Engineering Vol. 70, Issue 6, Pages: 139-148(2024)
- Affiliations：
  
  1. College of New Energy and Materials, China University of Petroleum,Beijing,China,102249
  2. State Key Laboratory of Heavy Oil Processing, College of Chemical Engineering, China University of Petroleum,Beijing,China,102249
  3. Beijing Spacecrafts,Beijing,China,100094
  4. SINOPEC Sales Co., Ltd.,Beijing,China,100728
  5. SINOPEC Research Institute of Petroleum Processing Co., Ltd,Beijing,China,100083
  6. Institute of Nuclear and New Energy Technology, Tsinghua University,Beijing,China,100084
  7. Beijing Key Laboratary of Fine Ceramics, Tsinghua University,Beijing,China,100084
- Author bio：
- Funds：
- DOI：10.1016/j.cjche.2024.02.009
  CLC：
- Published：2024
- Accepted：
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DOI：

Co DOI： 10.1016/j.cjche.2024.02.009.

摘要

Abstract

The nickel-rich layered cathode material LiNi

0.8

0.1

(NCM811) has high energy density

lower cost and is a promising cathode material currently under development. However

its electrochemical and structural stability is poor during cycling. Among the many modification methods

cation doping has been consistently proven to be an effective strategy for enhancing electrochemical performance. Herein

the NCM811 cathode material was modified by solid-phase reactions with Mg and Al doped. In addition

the corresponding mechanism of NCM811 cathode material-doped modification is explored by density functional theory (DFT) calculations

and we have extended this approach to other ternary cathode materials with different ratios and obtained universal laws. Combined with DFT calculations

the results show that Mg

occupies the Li

site and reduces the degree of Li

/Ni

mixture; Al

acts as a structural support during charging and discharging to prevent structural collapse. The electrochemical properties were tested by an electrochemical workstation and the LAND system

and the results showed that the capacity retention rate increased to varying degrees from 63.66% to 69.87% and 89.05% for NCM811-Mg and NCM811-Al at room temperature after 300 cycles

respectively. This study provides a theoretical basis and design strategy for commercializing cationic-doped modification of ni

ckel-rich cathode materials.

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