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PEO-Based Solid-State Polymer Electrolytes for Wide-Temperature Solid-State Lithium Metal Batteries.

Yunxuan Song1, Meng Su1, Hengying Xiang1

  • 1State Key Laboratory of Separation Membranes and Membrane Processes/National Center for International Joint Research on Separation Membranes, School of Textile Science and Engineering, Tiangong University, Tianjin, 300387, P. R. China.

Small (Weinheim an Der Bergstrasse, Germany)
|November 27, 2024
PubMed
Summary
This summary is machine-generated.

Polyethylene oxide (PEO) solid electrolytes struggle with temperature variations, limiting their use in solid-state lithium metal batteries. This review explores PEO modification strategies to achieve wider operating temperature ranges for improved battery performance.

Keywords:
High‐performance solid‐state lithium metal batteriesLow temperature and high temperaturesModification methodsPEO‐based solid‐state polymer electrolytesWide temperature ranges

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Polymer Science

Background:

  • Solid-state lithium metal batteries require electrolytes with a wide operating temperature range.
  • Polyethylene oxide (PEO)-based solid-state electrolytes offer flexibility but perform poorly outside 60-65°C.
  • Temperature fluctuations (≤25°C and ≥80°C) degrade PEO electrolyte performance.

Purpose of the Study:

  • To review modification strategies for PEO electrolytes to enable low, high, and wide-temperature applications.
  • To analyze the mechanisms behind PEO electrolyte modification at different temperatures.
  • To provide guidance for developing PEO solid batteries with enhanced temperature resilience.

Main Methods:

  • Analysis of PEO electrolyte shortcomings under temperature influence.
  • Summarization of modification strategies including PEO derivatives, fillers, lithium salt regulation, functional layers, and MOFs/COFs.
  • Review of mechanisms involved in PEO modification for diverse temperature conditions.

Main Results:

  • Identified temperature-dependent limitations of conventional PEO solid electrolytes.
  • Categorized and detailed various modification approaches for PEO electrolytes.
  • Highlighted the role of PEO derivatives, fillers, and advanced materials like MOFs/COFs.

Conclusions:

  • Effective modification of PEO electrolytes is crucial for achieving wide-temperature solid-state batteries.
  • Multiple strategies exist to enhance PEO performance across various temperatures.
  • Further research into PEO modification trends will drive the development of robust solid-state batteries.