• 综合
  • 标题
  • 关键词
  • 摘要
  • 学者
  • 期刊-刊名
  • 期刊-ISSN
  • 会议名称
搜索

作者:

Zhang, Zhengfeng (Zhang, Zhengfeng.) | Qin, Changdong (Qin, Changdong.) | Wang, Kuan (Wang, Kuan.) | Han, Xiao (Han, Xiao.) | Li, Jinhui (Li, Jinhui.) | Sui, Manling (Sui, Manling.) | Yan, Pengfei (Yan, Pengfei.) (学者:闫鹏飞)

收录:

EI Scopus SCIE

摘要:

Cathode electrolyte interphase (CEI) layer plays a crucial role in determining the electrochemical perfor-mance of lithium-ion batteries. Limited by the sensitive nature of CEI and the lack of characterization techniques, its dynamic evolution during cycling, its formation mechanism, and its specific impact on battery performance are not yet fully understood. Herein, we systematically investigate the dynamic evo-lution of CEI layer and its critical effect on the cycling performance of LiCoO2 cathode by diverse charac-terization techniques. We find that cycling voltage plays a key role in affecting CEI formation and evolution, and a critical potential (4.05 V vs. Li) is identified, which acts as the switching potential between CEI deposition and decomposition. We show that CEI starts deposition in the discharge process when the potential is below 4.05 V, and CEI decomposition occurs when the potential is higher than 4.05 V. When the battery is cycled below such a critical potential, a stable CEI layer is developed, which leads to superior cycling stability. When the battery is cycled above such a critical potential, a CEI-free cathode interface is observed, which also demonstrates good cycle stability. However, when the critical potential falls in the cycling voltage range, CEI deposition and decomposition are repeatedly switched on during cycling, leading to the dynamically unstable CEI layer. The unstable CEI layer causes continuous interfacial reaction and degradation, resulting in battery performance decay. Our work deepens the understanding of the CEI formation and evolution mechanisms, and clarifies the critical effect of CEI layer on cycling performance, which provides new insights into stabilizing the electrode-electrolyte interface for high-performance rechargeable batteries.(c) 2023 Science Press and Dalian Institute of Chemical Physics, Chinese Academy of Sciences. Published by ELSEVIER B.V. and Science Press. All rights reserved.

关键词:

LiCoO2 Electron microscopy XPS Lithium-ion battery CEI

作者机构:

  • [ 1 ] [Zhang, Zhengfeng]Beijing Univ Technol, Fac Mat & Mfg, Beijing Key Lab Microstruct & Property Solids, Beijing 100124, Peoples R China
  • [ 2 ] [Qin, Changdong]Beijing Univ Technol, Fac Mat & Mfg, Beijing Key Lab Microstruct & Property Solids, Beijing 100124, Peoples R China
  • [ 3 ] [Wang, Kuan]Beijing Univ Technol, Fac Mat & Mfg, Beijing Key Lab Microstruct & Property Solids, Beijing 100124, Peoples R China
  • [ 4 ] [Han, Xiao]Beijing Univ Technol, Fac Mat & Mfg, Beijing Key Lab Microstruct & Property Solids, Beijing 100124, Peoples R China
  • [ 5 ] [Li, Jinhui]Beijing Univ Technol, Fac Mat & Mfg, Beijing Key Lab Microstruct & Property Solids, Beijing 100124, Peoples R China
  • [ 6 ] [Sui, Manling]Beijing Univ Technol, Fac Mat & Mfg, Beijing Key Lab Microstruct & Property Solids, Beijing 100124, Peoples R China
  • [ 7 ] [Yan, Pengfei]Beijing Univ Technol, Fac Mat & Mfg, Beijing Key Lab Microstruct & Property Solids, Beijing 100124, Peoples R China

通讯作者信息:

  • [Sui, Manling]Beijing Univ Technol, Fac Mat & Mfg, Beijing Key Lab Microstruct & Property Solids, Beijing 100124, Peoples R China;;[Yan, Pengfei]Beijing Univ Technol, Fac Mat & Mfg, Beijing Key Lab Microstruct & Property Solids, Beijing 100124, Peoples R China;;

查看成果更多字段

相关关键词:

来源 :

JOURNAL OF ENERGY CHEMISTRY

ISSN: 2095-4956

年份: 2023

卷: 81

页码: 192-199

1 3 . 1 0 0

JCR@2022

ESI学科: CHEMISTRY;

ESI高被引阀值:20

被引次数:

WoS核心集被引频次:

SCOPUS被引频次:

ESI高被引论文在榜: 0 展开所有

万方被引频次:

中文被引频次:

近30日浏览量: 0

归属院系:

在线人数/总访问数:395/4968343
地址:北京工业大学图书馆(北京市朝阳区平乐园100号 邮编:100124) 联系我们:010-67392185
版权所有:北京工业大学图书馆 站点建设与维护:北京爱琴海乐之技术有限公司