材料科学
电池(电)
消隐
变形(气象学)
压力(语言学)
锂离子电池
弯曲
电极
数码产品
有限元法
储能
纳米技术
复合材料
机械工程
结构工程
电气工程
工程类
功率(物理)
语言学
物理
哲学
化学
物理化学
量子力学
作者
Qi Meng,Jiaming Zhu,Cong Kang,Xiangjun Xiao,Yulin Ma,Hua Huo,Pengjian Zuo,Chunyu Du,Shuaifeng Lou,Geping Yin
出处
期刊:Small
[Wiley]
日期:2022-09-23
卷期号:18 (45): 2204745-2204745
标识
DOI:10.1002/smll.202204745
摘要
Emerging directions in the growing wearable electronics market have spurred the development of flexible energy storage systems that require deformability while maintaining electrochemical performance. However, the traditional fabrication approaches of lithium-ion batteries (LIBs) are challenging to withstand long-cycle bending alternating loads due to the stress concentration caused by the nonuniformity of the actual deformation. Herein, inspired by kirigami, a segmented deformation design of full-cell scale thin-type flexible lithium-ion batteries (FLIBs) with large-scale manufacturing characteristics via the current collector's mechanical blanking process is reported. This strategy allows the battery's elliptical deformation of the actual state to be transformed into the circular strain of the ideal configuration, thereby dispersing the stress concentration on the top of the battery. According to the results, the designed battery maintains >95% capacity after >20 000 harsh in situ dynamic tests. In addition, finite element analysis further reveals the mechanism that the segmented deformation strategy bears the mechanical stress. This work can enlighten the rational design and customization of electrode patterns for high compatibility with various devices, thereby providing potential opportunities for the application of FLIBs.
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