阴极
材料科学
降级(电信)
开裂
电池(电)
电极
粒子(生态学)
联轴节(管道)
电化学
电子
离子
热传导
化学物理
纳米技术
复合材料
化学
电子工程
电气工程
物理化学
热力学
物理
工程类
地质学
功率(物理)
有机化学
海洋学
量子力学
作者
Minghao Zhang,Mehdi Chouchane,S. Ali Shojaee,B. Winiarski,Zhao Liu,Letian Li,Rengarajan Pelapur,Abbos Shodiev,Weiliang Yao,Jean-Marie Doux,Shen Wang,Yixuan Li,Chaoyue Liu,Herman Lemmens,Alejandro A. Franco,Ying Shirley Meng
出处
期刊:Joule
[Elsevier]
日期:2023-01-01
卷期号:7 (1): 201-220
被引量:14
标识
DOI:10.1016/j.joule.2022.12.001
摘要
Using a thick NMC811 (LiNi0.8Mn0.1Co0.1O2) electrode as an example, we present a macro- to nanoscale 2D and 3D imaging analysis approach coupled with 4D (space + time) computational modeling to probe its degradation mechanism in a lithium-ion battery cell. Particle cracking increases and contact loss between particles and carbon-binder domain are observed to correlate with the cell degradation. This study unravels that the reaction heterogeneity within the thick cathode caused by the unbalanced electron conduction is the main cause of the battery degradation over cycling. The increased heterogeneity in the system will entail more cathode regions where the degree of active material utilization is uneven, leading to higher probabilities of particle cracking. These findings shed light on the crucial role of the electronic and ionic transportation networks in the performance deterioration of the thick cathode. They also provide guidance for cathode architecture optimization and performance improvement.
科研通智能强力驱动
Strongly Powered by AbleSci AI