Decoupling Ion-Electron Transport in Thick Solid-State Battery Electrodes

Amin Song, Wujiu Zhang, Li Ma, Yicheng Lai, Yaohua Zhao, Jifu Zhu, Mengjie Huang, Lei Wang, Lei Dong, Nan Li, Chao Shen, Keyu Xie

科研成果: 期刊稿件文章同行评审

4 引用 (Scopus)

摘要

Thick electrode architecture, promising better energy storage performance in solid-state batteries (SSBs), requires an optimized ion permeation network design. Unfortunately, ignoring the complex ion-electron coupling, the single ion diffusion optimized array electrodes have an unbalanced energy/power density issue. Hence, a vascularized electrode with a homogeneous electronic/ionic transport network is proposed. By decoupling the ion-electron transport process, a multifactor correlated thick electrode design criterion is established. The competitive effects of space and mass of the active/inactive components are considered for architecture optimization and performance improvement. The optimized LiFeO4 (LFP) electrode ensures high-rate operation at ultrahigh areal capacity, achieving power densities exceeding 1600 W kg-1. The solid-state pouch cells exhibit long-term cyclability, providing high energy/power density (approximately 200 Wh kg-1, 687 W kg-1) and thermal/mechanical tolerance. Furthermore, bipolar stacking enables pouch cells to have a high voltage and volumetric energy density. This work lays a solid foundation for the commercial application of thick electrodes, illuminating the future of industrial solid-state batteries.

源语言英语
页(从-至)5027-5036
页数10
期刊ACS Energy Letters
9
10
DOI
出版状态已出版 - 11 10月 2024

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