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Fabrication of porous LLZO solid electrolyte based on modified kapok fiber

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Abstract

As one of the most promising solid electrolytes, Li7La3Zr2O12(LLZO) has received great attention in the field of all solid-state lithium-ion batteries. However, LLZO, as a solid material, has far less contact with the electrode than original liquid electrolyte with wettable properties in practical applications. In this study, porous LLZO solid electrolytes were fabricated by both mechanical and dispersive mixing methods with modified kapok fibers as pore-forming agents. The results show that the pores of LLZO prepared by dispersive mixing are more homogeneous than that prepared by mechanical mixing, and the ionic conductivity of LLZO fabricated by dispersive mixing remains in the same order of magnitude as the ionic conductivity of the original LLZO solid electrolyte. At the same time, the formation of ordered pore channels for porous LLZO is conducive to increasing the contact area between the solid electrolyte and the electrode material, which lays a foundation for reducing the impedance of solid electrolyte.

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Funding

This work was supported by the Natural Science Foundation of Shanxi Province China (Grant No. 201901D111138) and Shanxi Scholarship Council of China (HGKY2019069).

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Authors and Affiliations

  1. School of Chemistry and Chemical Engineering, North University of China, Taiyuan, 030051, China

    Linting Han, ** Chen & Hongxia **g

  2. Shanxi Key Laboratory of High Performance Battery Materials and Devices, North University of China, Taiyuan, 030051, China

    ** Chen & Lixin Zhang

Authors
  1. Linting Han
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  2. **aofeng Yang
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  3. Hui Wang
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  4. Zhi** Chen
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  5. Hongxia **g
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Contributions

All the authors contributed to the completion of this paper. The details are as follows: (1) LH main contributions included research designer, experiment implementation, data processing and analysis, and paper writing. (2) XY contributions included research idea and designer, paper revision, and providing funding and platforms for research. (3) HW and ZC contributions were to revise the article. (4) HJ and LZ contributions were to assist the first author in the testing of the electrochemical impedance.

Corresponding author

Correspondence to **aofeng Yang.

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Han, L., Yang, X., Wang, H. et al. Fabrication of porous LLZO solid electrolyte based on modified kapok fiber. J Mater Sci: Mater Electron 34, 956 (2023). https://doi.org/10.1007/s10854-023-10404-y

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