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2D MXene-containing polymer electrolytes for all-solid-state lithium metal batteries

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Abstract

Nanocomposite polymer electrolytes (CPEs) are promising materials for all-solid-state lithium metal batteries (LMBs) due to their enhanced ionic conductivities and stability to the lithium anode. MXenes are a new two-dimensional, 2D, family of early transition metal carbides and nitrides, which have a high aspect ratio and a hydrophilic surface. Herein, using a green, facile aqueous solution blending method, we uniformly dispersed small amounts of Ti3C2Tx into a poly(ethylene oxide)/LiTFSI complex (PEO20-LiTFSI) to fabricate MXene-based CPEs (MCPEs). The addition of the 2D flakes to PEO simultaneously retards PEO crystallization and enhances its segmental motion. Compared to the 0D and 1D nanofillers, MXenes show higher efficiency in ionic conductivity enhancement and improvement in the performance of LMBs. The CPE with 3.6 wt% MXene shows the highest ionic conductivity at room temperature (2.2 × 10−5 S m−1 at 28 °C). An LMB using MCPE with only 1.5 wt% MXene shows rate capability and stability comparable with that of the state-of-the-art CPELMBs. We attribute the excellent performance to the 2D geometry of the filler, the good dispersion of the flakes in the polymer matrix, and the functional group-rich surface.

Graphical abstract: 2D MXene-containing polymer electrolytes for all-solid-state lithium metal batteries

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Publication details

The article was received on 11 Sep 2018, accepted on 13 Sep 2018 and first published on 14 Sep 2018


Article type: Paper
DOI: 10.1039/C8NA00206A
Citation: Nanoscale Adv., 2019, Advance Article
  • Open access: Creative Commons BY-NC license
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    2D MXene-containing polymer electrolytes for all-solid-state lithium metal batteries

    Q. Pan, Y. Zheng, S. Kota, W. Huang, S. Wang, H. Qi, S. Kim, Y. Tu, M. W. Barsoum and C. Y. Li, Nanoscale Adv., 2019, Advance Article , DOI: 10.1039/C8NA00206A

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