Single-Ion Conducting Polymeric Protective Interlayer for Stable Solid Lithium-Metal Batteries

Xinyuan Shan, Sheng Zhao, Mengxiang Ma, Yiyang Pan, Zhenxue Xiao, Bingrui Li, Alexei P. Sokolov, Ming Tian, Huabin Yang, Peng Fei Cao

Research output: Contribution to journalArticlepeer-review

15 Scopus citations

Abstract

With many reported attempts on fabricating single-ion conducting polymer electrolytes, they still suffer from low ionic conductivity, narrow voltage window, and high cost. Herein, we report an unprecedented approach on improving the cationic transport number (tLi+) of the polymer electrolyte, i.e., single-ion conducting polymeric protective interlayer (SIPPI), which is designed between the conventional polymer electrolyte (PVEC) and Li-metal electrode. Satisfied ionic conductivity (1 mS cm-1, 30 °C), high tLi+ (0.79), and wide-area voltage stability are realized by coupling the SIPPI with the PVEC electrolyte. Benefiting from this unique design, the Li symmetrical cell with the SIPPI shows stable cycling over 6000 h at 3 mA cm-2, and the full cell with the SIPPI exhibits stable cycling performance with a capacity retention of 86% over 1000 cycles at 1 C and 25 °C. This incorporated SIPPI on the Li anode presents an alternative strategy for enabling high-energy density, long cycling lifetime, and safe and cost-effective solid-state batteries.

Original languageEnglish
Pages (from-to)56110-56119
Number of pages10
JournalACS Applied Materials and Interfaces
Volume14
Issue number50
DOIs
StatePublished - Dec 21 2022

Funding

This work was financially supported by the Natural Science Foundation of China (21421001), the Natural Science Foundation of Tianjin, China (18JCZDJC31400), and the MOE Innovation Team (IRT13022). P.-F.C. acknowledges the partial financial support by the Fundamental Research Funds for the Central Universities (buctrc202222). A.P.S. acknowledges partial financial support on idea conception and manuscript revision by the U.S. Department of Energy, Office of Science, Basic Energy Science, Material Science, and Engineering Division.

Keywords

  • Li-metal batteries
  • polymer electrolyte
  • polymeric protective interlayer
  • single-ion conducting
  • solid-state battery

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