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作者:

Mu, Xulin (Mu, Xulin.) | Huang, Kai (Huang, Kai.) | Zhu, Genxiang (Zhu, Genxiang.) | Li, Yan (Li, Yan.) | Liu, Conghui (Liu, Conghui.) | Hui, Xiaojuan (Hui, Xiaojuan.) | Sui, Manling (Sui, Manling.) | Yan, Pengfei (Yan, Pengfei.) (学者:闫鹏飞)

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EI Scopus SCIE

摘要:

Exploring the structure transformation mechanism of the spent cathodes during their regeneration process is the key to optimizing the processing protocol. The spent cathode materials are in different state of health (SOH) due to their different operation history, which leads to the challenge of restoring them in one-pot. Herein, to address the effect of SOH on the direct regeneration protocol, we systematically investigated the spent LiCoO2 (LCO) cathode with low and high SOH. We find that lithium-deficiency and Al impurity are the two important factors in affecting the regeneration quality of the spent LCO. Lithium-deficiency can cause void defects and disordered lattice structure. Al impurity is brought to the LCO surface during lithium replenishment process, which further diffuses into the LCO subsurface layer during the following high temperature sintering. Based on our understanding of the regeneration process, the regeneration protocol is optimized accordingly, which can successfully restore the spent LCO with different SOH.

关键词:

State of health Direct regeneration TEM LiCoO2 Lithium ion battery

作者机构:

  • [ 1 ] [Mu, Xulin]Beijing Univ Technol, Fac Mat & Mfg, Beijing Key Lab Microstruct & Properties Solid, Beijing 100124, Peoples R China
  • [ 2 ] [Huang, Kai]Beijing Univ Technol, Fac Mat & Mfg, Beijing Key Lab Microstruct & Properties Solid, Beijing 100124, Peoples R China
  • [ 3 ] [Li, Yan]Beijing Univ Technol, Fac Mat & Mfg, Beijing Key Lab Microstruct & Properties Solid, Beijing 100124, Peoples R China
  • [ 4 ] [Hui, Xiaojuan]Beijing Univ Technol, Fac Mat & Mfg, Beijing Key Lab Microstruct & Properties Solid, Beijing 100124, Peoples R China
  • [ 5 ] [Sui, Manling]Beijing Univ Technol, Fac Mat & Mfg, Beijing Key Lab Microstruct & Properties Solid, Beijing 100124, Peoples R China
  • [ 6 ] [Yan, Pengfei]Beijing Univ Technol, Fac Mat & Mfg, Beijing Key Lab Microstruct & Properties Solid, Beijing 100124, Peoples R China
  • [ 7 ] [Zhu, Genxiang]Hefei Kejing Mat Technol Co Ltd, Hefei 230000, Anhui, Peoples R China
  • [ 8 ] [Liu, Conghui]Hefei Kejing Mat Technol Co Ltd, Hefei 230000, Anhui, Peoples R China

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来源 :

NANO ENERGY

ISSN: 2211-2855

年份: 2023

卷: 112

1 7 . 6 0 0

JCR@2022

ESI学科: MATERIALS SCIENCE;

ESI高被引阀值:26

被引次数:

WoS核心集被引频次:

SCOPUS被引频次: 19

ESI高被引论文在榜: 0 展开所有

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