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Research Article | Open Access

LATP-coated LiNi0.8Co0.1Mn0.1O2 cathode with compatible interface with ultrathin PVDF-reinforced PEO-LLZTO electrolyte for stable solid-state lithium batteries

Xiao Chena, Yinda Lib, Yunhao Lub, Jian Xiea( ), Cheng Huangc, Xiongwen Xuc, Jian Tuc, Xinbing Zhaoa, Tiejun Zhua( )
State Key Laboratory of Silicon and Advanced Semiconductor Materials, School of Materials Science and Engineering, Zhejiang University, Hangzhou, 310058, China
Department of Physics, Zhejiang University, Hangzhou, 310058, China
LI-FUN Technology Corporation Limited, Zhuzhou, 412000, China

Peer review under responsibility of The Chinese Ceramic Society.

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Graphical Abstract

Abstract

LiNi0.8Co0.1Mn0.1O2 (NCM811) is considered as a promising cathode for high-energy-density solid-sate Li metal battery for its high theoretical capacity. However, the high oxidizability and structural instability during charge limit its practical applications. In this work, 1% (in mass) of nanosized Li1.3Al0.3Ti1.7(PO4)3 (LATP) was coated on NCM811 to enhance its electrochemical stability with a ceramic/polymer composite electrolyte. A robust, ultrathin (11 μm) composite electrolyte film was prepared by combining poly(vinylidene fluoride) (PVDF) with polyethylene oxide (PEO)-Li6.5La3Zr1.5Ta0.5O12 (LLZTO). An in-situ polymerization process was used to enhance the interface between the PVDF/PEO-LLZTO (PPL) composite electrolyte and the LATP-coated NCM811 (LATP-NCM811). Coin-type Li|LATP-NCM811 cell with the PPL electrolyte exhibits stable cycling with an 81% capacity retention after 100 cycles at 0.5 C. Pouch-type cell was also fabricated, which can be stably cycled for 70 cycles at 0.5 C/1.0 C (80% retention), and withstand abuse tests of bending, cutting and nail penetration. This work provides an applicable method to fabricate solid-state Li metal batteries with high performance.

Keywords

Ultrathin electrolyte filmLiNi0.8Co0.1Mn0.1O2Li1.3Al0.3Ti1.7(PO4)3 coatingIn-situ polymerizationLi metal battery

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Journal of Materiomics
Volume 10 Issue 3,
May 2024
Pages 682-693
DOI: 10.1016/j.jmat.2023.08.015
Cite this article:
Chen X, Li Y, Lu Y, et al. LATP-coated LiNi0.8Co0.1Mn0.1O2 cathode with compatible interface with ultrathin PVDF-reinforced PEO-LLZTO electrolyte for stable solid-state lithium batteries. Journal of Materiomics, 2024, 10(3): 682-693. https://doi.org/10.1016/j.jmat.2023.08.015

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Received: 06 July 2023
Revised: 26 August 2023
Accepted: 30 August 2023
Published: 01 October 2023
© 2023 The Authors.

This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).
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