High Safety and Long-Life Lithium Batteries with Low Leakage and High Wettability Ceramic-Polymer Electrolyte

Alternative Title

PVDF/PEO-based ceramic-polymer electrolytes for safe and long-life lithium batteries

Abstract

The development of ceramic-polymer electrolyte with high mechanical and electrochemical properties is the key to address the safety issue of high-performance lithium batteries due to the use of flammable organic liquid electrolytes. In this work, we designed and synthesized a flexible low liquid leakage and high wettability ceramic-polymer electrolyte (CPE) based on poly(vinylidene fluoride) (PVDF)-poly(ethylene oxide) (PEO)-γ-Al2O3 membrane with excellent mechanical and thermal stability. After being wetted by a very small amount of LiPF -based liquid electrolyte, symmetrical Li, Li/LiFePO4 (LFP), and LFP/Li4Ti5O12 (LTO) cells with this PVDF/PEO-γ-Al2O3 -LiPF6 CPE displayed much better cycling stabilities than that of commercial Celgard 2320 separator with a sufficient amount of liquid electrolyte. The CPE requires only a small amount of liquid electrolyte to achieve the desired electrochemical performance of lithium batteries. Its low liquid leakage characteristic also enhances the safety of lithium batteries, with the potential to replace the commercial separators.

Department(s)

Chemical and Biochemical Engineering

Research Center/Lab(s)

Intelligent Systems Center

Comments

National Science Foundation, Grant NSF DMR 1464111

Keywords and Phrases

Ceramic-polymer electrolyte; Flexible membrane; Ionic conductivity; Lithium batteries; Low liquid leakage

International Standard Serial Number (ISSN)

0947-7047; 1862-0760

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2021 Springer, All rights reserved.

Publication Date

01 Mar 2021

Link to Full Text

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