文献类型：期刊文献

英文题名：Experimental study on the degradation characteristics and mechanism of lithium-ion batteries under mild mechanical deformation

作者：Shi, Tianlu An, Zhoujian Du, Xiaoze Ding, Yong Jia, Ruixin Li, Wenda Zhang, Dong

第一作者：Shi, Tianlu

通信作者：An, ZJ[1];Du, XZ[1]

机构：[1]Lanzhou Univ Technol, Coll Energy & Power Engn, Lanzhou 730050, Peoples R China;[2]Guizhou Inst Technol, Sch Aerosp Engn, Guiyang 550003, Peoples R China;[3]Lanzhou Univ Technol, Key Lab Adv Pumps Valves & Fluid Control Syst, Minist Educ, Lanzhou 730050, Peoples R China

第一机构：Lanzhou Univ Technol, Coll Energy & Power Engn, Lanzhou 730050, Peoples R China

通信机构：corresponding author), Lanzhou Univ Technol, Coll Energy & Power Engn, Lanzhou 730050, Peoples R China.

年份：2025

卷号：108

外文期刊名：JOURNAL OF ENERGY STORAGE

收录：;EI(收录号：20245317607331);Scopus(收录号：2-s2.0-85213205964);WOS:【SCI-EXPANDED(收录号:WOS:001400351900001)】；

基金：This work was financially supported by the National Natural Science Foundation of China (52206087; 52130607) , the Key R & D Program of Gansu Province (23YFGA0066; 23YFGA0035) , the Guizhou Provincial Science and Technology Projects (ZK [2021] -281) , the Industrial Support Plan Project of Gansu Provincial Education Department (2022CYZC-21; 2021CYZC27) , the Doctoral Research Funds of Lanzhou University of Technology (061907) and the Red Willow Excellent Youth Project of Lanzhou University of Technology.

语种：英文

外文关键词：Lithium-ion battery; Mild mechanical deformation; Internal resistance characteristics; Capacity degradation

摘要：The mild mechanical deformation of lithium-ion battery resulted from slight mechanical abuse condition have an obvious effect influence on its performance. This study investigated the effects of mild mechanical compression on the performance of commercial pouch-type LiFePO4 batteries at different initial states of charge (SOC). The results showed that mild mechanical deformation notably affected the internal resistance and capacity of lithiumion batteries, closely related to the initial SOC. As the initial SOC decreased, both internal resistance and capacity degradation intensified. At 30 % SOC, the batteries exhibited the highest internal resistance and most severe capacity degradation, while at 80 % and 100 % SOC, the rates of internal resistance increase and capacity degradation were relatively low. Compared to batteries at 100 % SOC, those at 30 % SOC showed capacity degradation rates increasing from 1.33 % to 3.19 %. The primary cause of capacity degradation was the loss of active material (LAM). Scanning electron microscope images revealed that mild mechanical compression induced structural and morphological changes in the electrodes, such as graphite particle breakage, reduced and stretched separator pore size and decreased porosity. These changes resulted in the loss of active material, increased internal resistance and capacity degradation. The findings provided theoretical insights into performance degradation of lithium-ion batteries under mild mechanical deformation.