Constructing high performance dry-processing oxide composite electrolyte via interfacial interactions for durable solid-state lithium batteries

doi:10.1016/j.jpowsour.2024.235631

2025-01-01

PRE

张红强 (Hongqiang Zhang)

DOI：10.1016/j.jpowsour.2024.235631

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摘要

En 中文

Composite solid electrolytes (CSEs) have considerable combination properties, which have been considered as the most promising choice for realizing advanced solid-state lithium batteries. Yet the ionic conductivity of CSEs fails to meet the practical requirements. Herein, we develop a dry-processing CSEs based on Li1.5Al0.5Ge1.5(PO4)(3) (LAGP) and succinonitrile (SN) through polytetrafluoroethylene fibrillation. On the one hand, SN can enable fast ion transport in ceramic network and serve as high-speed conducive path. On the other hand, the strong affinities of LAGP towards SN and anions can significantly improve the conductive behavior and restrict side reactions at electrolyte/Li interface. Under such regulations, the composite electrolyte exhibits high ionic conductivity (0.64 mS cm(-1) at 30 degrees C), high transference number (0.50), and high oxidation potential (>5.0V vs. Li+/Li). The assembled lithium metal batteries demonstrate excellent stability over 300 cycles at 1.0C. This work demonstrates the ion migration mechanism and the interactions at the heterogeneous interface for SN enhanced CSEs, contributing to the development of durable solid lithium metal batteries with extended lifespan.

Keyword:

Lithium battery

Composite solid electrolyte

Succinonitrile

Interface interaction

Li1.5 Al0.5Ge1.5 (PO4)( 3)

期刊

Journal of Power Sources

IF:

7.9

论文数:

3.7W

被引数:

15.0W

机构

harbin institute of technology

学者数:

8.0W

论文数: 6.6W

被引数: 66

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