中国物理B ›› 2020, Vol. 29 ›› Issue (2): 26201-026201.doi: 10.1088/1674-1056/ab6841

所属专题: TOPICAL REVIEW — Advanced calculation & characterization of energy storage materials & devices at multiple scale

• SPECIAL TOPIC—Recent advances in thermoelectric materials and devices • 上一篇    下一篇

Review on electrode-level fracture in lithium-ion batteries

Bo Lu(吕浡), Chengqiang Ning(宁成强), Dingxin Shi(史定鑫), Yanfei Zhao(赵炎翡), Junqian Zhang(张俊乾)   

  1. 1 Shanghai Institute of Applied Mathematics and Mechanics, School of Mechanics and Engineering Science, Shanghai University, Shanghai 200444, China;
    2 Shanghai Key Laboratory of Mechanics in Energy Engineering, Shanghai University, Shanghai 200444, China;
    3 Department of Civil Engineering, Shanghai University, Shanghai 200444, China
  • 收稿日期:2019-10-30 修回日期:2019-12-30 出版日期:2020-02-05 发布日期:2020-02-05
  • 通讯作者: Yanfei Zhao E-mail:yfzhao@shu.edu.cn
  • 基金资助:
    Project supported by the National Key Research and Development Program of China (Grant No. 2017YFB0701604), the National Natural Science Foundation of China (Grant Nos. 11702166, 11702164, 11872236, and 11332005), and the Shanghai Sailing Program, China (Grant No. 17YF1606000).

Review on electrode-level fracture in lithium-ion batteries

Bo Lu(吕浡)1,2, Chengqiang Ning(宁成强)1,2, Dingxin Shi(史定鑫)3, Yanfei Zhao(赵炎翡)3, Junqian Zhang(张俊乾)1,2   

  1. 1 Shanghai Institute of Applied Mathematics and Mechanics, School of Mechanics and Engineering Science, Shanghai University, Shanghai 200444, China;
    2 Shanghai Key Laboratory of Mechanics in Energy Engineering, Shanghai University, Shanghai 200444, China;
    3 Department of Civil Engineering, Shanghai University, Shanghai 200444, China
  • Received:2019-10-30 Revised:2019-12-30 Online:2020-02-05 Published:2020-02-05
  • Contact: Yanfei Zhao E-mail:yfzhao@shu.edu.cn
  • Supported by:
    Project supported by the National Key Research and Development Program of China (Grant No. 2017YFB0701604), the National Natural Science Foundation of China (Grant Nos. 11702166, 11702164, 11872236, and 11332005), and the Shanghai Sailing Program, China (Grant No. 17YF1606000).

摘要: Fracture occurred in electrodes of the lithium-ion battery compromises the integrity of the electrode structure and would exert bad influence on the cell performance and cell safety. Mechanisms of the electrode-level fracture and how this fracture would affect the electrochemical performance of the battery are of great importance for comprehending and preventing its occurrence. Fracture occurring at the electrode level is complex, since it may involve fractures in or between different components of the electrode. In this review, three typical types of electrode-level fractures are discussed: the fracture of the active layer, the interfacial delamination, and the fracture of metallic foils (including the current collector and the lithium metal electrode). The crack in the active layer can serve as an effective indicator of degradation of the electrochemical performance. Interfacial delamination usually follows the fracture of the active layer and is detrimental to the cell capacity. Fracture of the current collector impacts cell safety directly. Experimental methods and modeling results of these three types of fractures are concluded. Reasonable explanations on how these electrode-level fractures affect the electrochemical performance are sorted out. Challenges and unsettled issues of investigating these fracture problems are brought up. It is noted that the state-of-the-art studies included in this review mainly focus on experimental observations and theoretical modeling of the typical mechanical damages. However, quantitative investigations on the relationship between the electrochemical performance and the electrode-level fracture are insufficient. To further understand fractures in a multi-scale and multi-physical way, advancing development of the cross discipline between mechanics and electrochemistry is badly needed.

关键词: fracture, electrode, lithium-ion battery

Abstract: Fracture occurred in electrodes of the lithium-ion battery compromises the integrity of the electrode structure and would exert bad influence on the cell performance and cell safety. Mechanisms of the electrode-level fracture and how this fracture would affect the electrochemical performance of the battery are of great importance for comprehending and preventing its occurrence. Fracture occurring at the electrode level is complex, since it may involve fractures in or between different components of the electrode. In this review, three typical types of electrode-level fractures are discussed: the fracture of the active layer, the interfacial delamination, and the fracture of metallic foils (including the current collector and the lithium metal electrode). The crack in the active layer can serve as an effective indicator of degradation of the electrochemical performance. Interfacial delamination usually follows the fracture of the active layer and is detrimental to the cell capacity. Fracture of the current collector impacts cell safety directly. Experimental methods and modeling results of these three types of fractures are concluded. Reasonable explanations on how these electrode-level fractures affect the electrochemical performance are sorted out. Challenges and unsettled issues of investigating these fracture problems are brought up. It is noted that the state-of-the-art studies included in this review mainly focus on experimental observations and theoretical modeling of the typical mechanical damages. However, quantitative investigations on the relationship between the electrochemical performance and the electrode-level fracture are insufficient. To further understand fractures in a multi-scale and multi-physical way, advancing development of the cross discipline between mechanics and electrochemistry is badly needed.

Key words: fracture, electrode, lithium-ion battery

中图分类号:  (Fracture)

  • 62.20.mm
82.45.Fk (Electrodes) 82.47.Aa (Lithium-ion batteries)