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2D MXene-Containing Polymer Electrolytes for All-Solid-State Lithium Metal Batteries

Abstract

Nanocomposite polymer electrolytes (CPEs) are promising materials for all-solid-state lithium metal batteries (LMBs) due to their enhanced ionic conductivities and stabilitity to lithium anode. Mxene is a new two-dimensional, 2D, family of early transition metal carbides and nitrides, that has high aspect ratio and hydrophylic surface. Herein, using a green, facile aqueous solution blending method, we uniformly dispersed small amounts of Ti3C2Tx into 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, enhances its segmental motion. Compared to the 0D and 1D nanofillers, MXene shows higher efficiency in ionic conductivity enhancement and LMBs perfomance improvement. The CPE with 3.6 wt.% MXene shows the highest ionic conductivity at room temperature (2.2×10-5 S cm-1 at 28 °C). LMB using MCPE with only 1.5 wt.% MXene shows rate capability and stability comparable with the state-of-the-art CPE LMBs. 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.

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Publication details

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


Article type: Paper
DOI: 10.1039/C8NA00206A
Citation: Nanoscale Adv., 2019, Accepted Manuscript
  • 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. li, Nanoscale Adv., 2019, Accepted Manuscript , DOI: 10.1039/C8NA00206A

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