Stabilizing Solid Electrolyte-Anode Interface in Li-Metal Batteries by Boron Nitride-Based Nanocomposite Coating

Qian Cheng, Aijun Li, Na Li, Shuang Li, Amirali Zangiabadi, Tai De Li, Wenlong Huang, Alex Ceng Li, Tianwei Jin, Qingquan Song, Weiheng Xu, Nan Ni, Haowei Zhai, Martin Dontigny, Karim Zaghib, Xiuyun Chuan, Dong Su, Kai Yan*, Yuan Yang

*此作品的通讯作者

科研成果: 期刊稿件文章同行评审

260 引用 (Scopus)

摘要

Solid-state Li-metal batteries are promising to improve both safety and energy density compared to conventional Li-ion batteries. However, various high-performance and low-cost solid electrolytes are incompatible with Li, which is indispensable for enhancing energy density. Here, we utilize a chemically inert and mechanically robust boron nitride (BN) film as the interfacial protection to preclude the reduction of Li1.3Al0.3Ti1.7(PO4)3 (LATP) solid electrolyte by Li, which is validated by in situ transmission electron microscopy. When combined with ∼1–2 μm PEO polymer electrolyte at the Li/BN interface, Li/Li symmetric cells show a cycle life of over 500 h at 0.3 mA·cm−2. In contrast, the same configuration with bare LATP dies after 81 h. The LiFePO4/LATP/BN/PEO/Li solid-state batteries show high capacity retention of 96.6% after 500 cycles. This study offers a general strategy to protect solid electrolytes that are unstable against Li and opens possibilities for adopting them in solid-state Li-metal batteries.

源语言英语
页(从-至)1510-1522
页数13
期刊Joule
3
6
DOI
出版状态已出版 - 19 6月 2019
已对外发布

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