Fast Lithium Ion Transport Pathways Constructed by Two-Dimensional Boron 
Nitride Nanoflakes in Quasi-Solid-State Polymer Electrolyte

Zuo, J.; Dang, Y.; Zhai, P.; Li, B.; Wang, L.; Wang, M.; Yang, Z.; Chen, Q.; Gu, X.; Li, Z.; Tang, P.; Gong, Y.

doi:10.1021/acs.nanolett.3c02169

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Fast Lithium Ion Transport Pathways Constructed by Two-Dimensional Boron Nitride Nanoflakes in Quasi-Solid-State Polymer Electrolyte

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Tang, P.
School of Materials Science and Engineering, Beihang University;
Theory Group, Theory Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society;
Center for Free-Electron Laser Science;

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https://doi.org/10.1021/acs.nanolett.3c02169
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引用

Zuo, J., Dang, Y., Zhai, P., Li, B., Wang, L., Wang, M., Yang, Z., Chen, Q., Gu, X., Li, Z., Tang, P., & Gong, Y. (2023). Fast Lithium Ion Transport Pathways Constructed by Two-Dimensional Boron Nitride Nanoflakes in Quasi-Solid-State Polymer Electrolyte. Nano Letters, 23(17), 8106-8114. doi:10.1021/acs.nanolett.3c02169.

引用: https://hdl.handle.net/21.11116/0000-000D-A0CA-A

要旨

Quasi-solid-state electrolytes (QSSEs) are gaining huge popularity because of their significantly improved safety performance over nonaqueous liquid electrolytes and superior process adaptability over all-solid-state electrolytes. However, because of the existence of liquid molecules, QSSEs typically have low lithium ion transference numbers and compromised thermal stability. In this work, we present the fabrication of a well-rounded QSSE by introducing hexagonal boron nitride nanoflakes (BNNFs) as an inorganic filler in a poly(vinylene carbonate) matrix. BNNFs, in contrast to most inorganic fillers used as anion trappers, are used to build fast lithium ion transport pathways directly on their two-dimensional surfaces. We confirm the attractive coupling between lithium ions and BNNFs, and we confirm that with the help of BNNFs, lithium ions can migrate with less damping and a lower transport energy barrier. As a result, the designed electrolyte exhibits good ion transportability, promoted fire retardancy, and good compatibility with lithium metal anodes and commercial cathodes.