A functional-gradient-structured ultrahigh modulus solid polymer electrolyte for all-solid-state lithium metal batteries


Journal Article

This journal is © The Royal Society of Chemistry. There is a contradiction between achieving a high modulus solid polymer electrolyte (SPE) and good interface contact in all-solid-state lithium metal batteries to prohibit the dendrite growth and increase the cell cyclability, respectively. Herein, we report a new functional-gradient-structured ultrahigh modulus SPE (FG-SPE) by integrating a ceramic-rich phase and polymer-rich phase. The ceramic-rich phase physically prohibits the dendrite growth, while the polymer-rich phase improves the interface compatibility between the cathode and electrolyte. As a result, this ultrahigh modulus solid polymer electrolyte renders a low charging voltage polarization of 0.5 mA h cm-2 for FG-SPE-based symmetrical batteries. All-solid-state Li/LiFePO4 batteries based on this material show a high specific capacity of 163.2 mA h g-1 at 0.1C, and a high reversible capacity could still be obtained even at a rate of 2C. Importantly, the active material could achieve a high mass loading of 15.6 mg cm-2, which is significant for practical applications.

Full Text

Duke Authors

Cited Authors

  • Liu, J; Zhou, J; Wang, M; Niu, C; Qian, T; Yan, C

Published Date

  • January 1, 2019

Published In

Volume / Issue

  • 7 / 42

Start / End Page

  • 24477 - 24485

Electronic International Standard Serial Number (EISSN)

  • 2050-7496

International Standard Serial Number (ISSN)

  • 2050-7488

Digital Object Identifier (DOI)

  • 10.1039/c9ta07876b

Citation Source

  • Scopus