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A promising composite room temperature solid electrolyte via incorporating LLZTO into cross-linked ETPTA/PEO/SN matrix for all solid state lithium batteries

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Abstract

Composite solid electrolyte (CSE), especially the composite room temperature solid electrolyte (CRTSE), is emerging as the promising electrolyte for all-solid-state lithium batteries (ASSLB) due to their ability to combine the desirable properties of ceramic and polymer-based electrolytes and the room temperature operation condition. In this paper, the CRTSE with polyethylene oxide (PEO), bis(fluorosulfonyl)imide (LiTFSI), succinonitrile (SN), LLZTO inorganic fillers, and cross-linked ethoxylated trimethylolpropane triacrylate (ETPTA) was proposed. With the help of lithium dendrite suppression via cross-linked microscopic pore structure, enhancement of the ionic conductivity via LLZTO fillers, and wide electrochemical window via SN, the obtained LCSE showed high ionic conductivity (2.12 × 10−4 S cm−1), high Li+ transfer number (tLi+ = 0.55), and stable electrochemical window (5.0 V vs Li/Li+) at room temperature. The Li symmetrical cell with LCSE can cycle over 500 h stably with current density of 0.1 mA cm−2 and 0.5 mA cm−2 at room temperature. The full solid-state LiFePO4 cell can successfully work over 200 cycles with capacity retention ratio of about 70% at room temperature.

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Data availability

The data that support the findings of this study are available from the corresponding author upon reasonable request.

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Funding

This work was supported by Chongqing Science and Technology Bureau (cstc2021jcyj-msxmX0923), the Organization Department of Chongqing Municipal Committee (Chongqing Talent Innovation and Entrepreneurship Demonstration Team, CQYC20220309959), and Chongqing Education Commission of China (No. KJQN202304407).

Chongqing Municipal Science and Technology Bureau,cstc2021jcyj-msxmX0923,Chongqing Education Commission of China,KJQN202304407,KJQN202304407,Chongqing Talent innovation and entrepreneurship demonstration team,CQYC20220309959

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Authors and Affiliations

  1. College of Science, Chongqing University of Technology, Chongqing, 400054, China

    Bangxing Li, Xianlin Yi, Fei Wu, Xing Kang & Xiaolin Hu

  2. Department of Applied Physics, Chongqing Key Laboratory of Soft Condensed Matter Physics and Smart Materials, State Key Laboratory of Power Transmission Equipment & System Security and New Technology, Chongqing University, Chongqing, 400044, China

    Bangxing Li

  3. Chongqing Key Laboratory of New Energy Storage Materials and Devices, Chongqing, 400054, China

    Bangxing Li

  4. School of Electronic Commerce, Chongqing Business Vocational College, Chongqing, 401331, China

    Zhenjun Xie

  5. Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing, 400714, China

    Shuai Kang

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  1. Bangxing Li
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Contributions

All authors contributed to the study conception and design. Material preparation, data collection, and analysis were performed by Bangxing Li, Xianlin Yi, Zhenjun Xie, Fei Wu, Xing Kang, Shuai Kang, and Xiaolin Hu. The first draft of the manuscript was written by Bangxing Li, and all authors commented on previous versions of the manuscript. All authors read and approved the final manuscript.

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Correspondence to Bangxing Li, Xianlin Yi or Xiaolin Hu.

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Li, B., Yi, X., Xie, Z. et al. A promising composite room temperature solid electrolyte via incorporating LLZTO into cross-linked ETPTA/PEO/SN matrix for all solid state lithium batteries. Ionics 30, 2007–2017 (2024). https://doi.org/10.1007/s11581-024-05451-2

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