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Integrative Preparation of Mesoporous Epoxy Resin-Ceramic Composite Electrolytes with Multilayer Structure for Dendrite-Free Lithium Metal Batteries

Abstract

Polymer/ceramic layered composite electrolytes have become the promising electrolytes for Li metal batteries (LMBs) due to their high ionic conductivity, good mechanical properties, favorable wettability and excellent chemical stability with Li metal. However, the complexity of the preparation process and the increased interface impedance have hindered their extensive application in LMBs. To address these problems, we prepared a mesoporous epoxy resin matrix multilayer electrolyte composited with lithium lanthanum titanate (LLTO) nanoparticles (c-EME) using traditional direct casting method. The c-EME possesses a high ionic conductivity of 2.02 × 10−3 S cm−1, a large Li-ion transference number of 0.82, a wide electrochemical stability window up to 5.5 V at room temperature and a smaller interface impedance compared with pure epoxy resin matrix electrolyte (EME). In addition, the c-EME with multilayer structure could infiltrate the electrodes surface sufficiently and maintain uniform Li deposition even at high current density up to 4 mA cm-2 with areal capacity of 12 mA h cm-2. Furthermore, the assembled LiFePO4/Li full battery with c-EME exhibits high cycling stability and superior rate performance. Our results provide a new avenue for developing low cost, simple fabricating process, high safety and high stability LMBs based on porous epoxy resin-matrix electrolytes.

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Publication details

The article was received on 03 Jul 2018, accepted on 06 Sep 2018 and first published on 07 Sep 2018


Article type: Paper
DOI: 10.1039/C8TA06341A
Citation: J. Mater. Chem. A, 2018, Accepted Manuscript
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    Integrative Preparation of Mesoporous Epoxy Resin-Ceramic Composite Electrolytes with Multilayer Structure for Dendrite-Free Lithium Metal Batteries

    M. Li, H. Li, J. Lan, Y. Yu, Z. Du and X. Yang, J. Mater. Chem. A, 2018, Accepted Manuscript , DOI: 10.1039/C8TA06341A

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