材料科学
金属锂
电极
解耦(概率)
使用寿命
纳米技术
再分配(选举)
复合材料
计算机科学
控制工程
阳极
化学
物理化学
工程类
政治
政治学
法学
作者
Ye Xiao,Lei Xu,Chen‐Xi Bi,Shuo Zhang,Jun‐Fan Ding,Chong Yan,Jia‐Qi Huang
标识
DOI:10.1002/aenm.202304502
摘要
Abstract As an effective decoupling and quantification tool, reference electrodes (REs) are increasingly utilized in the development of high‐performance and high‐safety lithium (Li) batteries. However, it is still challenging to construct durable REs in practical battery systems given the sophistication of multi‐field interactions. In this contribution, the two‐stage failure mechanism of Li metal REs set inside working batteries is determined, including the active material loss period due to spatial redistribution behavior and then accelerated failure period based on mixed potential theory, which greatly threatens the dynamic service lifespan of REs. Furthermore, the targeted encapsulation strategy is proposed to control the structural vulnerability issue of Li metal REs. Compared to the unmodified RE, the encapsulated RE is validated feasible to kinetically mitigate the redistribution current through it via designed model experiments. Benefited from the improved structural stability, the encapsulated RE achieved twofold lifetime prolongation in 1 Ah pouch full cells during cycling. This work reveals the neglected structural failure mechanism of Li metal REs in operation and provides fresh design implications toward more durable REs in working batteries, with which deeper insights into battery landscape will be acquired.
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