Work

Preparation of Gel Electrolyte for Lithium Metal Solid-State Batteries and Its Failure Behavior at Different Temperatures

Year: 2026

Type: article

Abstract: The stability of the electrolyte is very important for the development of high-performance all-solid-state lithium batteries. To improve the stability of electrolyte performance, it is essential to first understand the causes of its deterioration. Physically speaking, the degradation of electrolyte performance is mainly due to interface degradation. PAN-PVDF-HFP-LiClO4-Li6.4La3Zr1.4Ta0.6O12 (LLZTO) gel polymer electrolyte was prepared by the UV curing method and assembled into a solid-state battery. The electrochemical properties of solid-state batteries were tested at −20 °C, 30 °C, and 60 °C. The test results show that the gel polymer electrolyte exhibits good electrochemical performance in this temperature range. (The ionic conductivities of the gel polymer electrolyte at −20 °C and 60 °C were 3.95 × 10−4 S·cm−1 and 5.04 × 10−4 S·cm−1, respectively.) At a current density of 0.2 C, the battery exhibited high initial specific discharge capacities of 122 mAh g−1 and 151.6 mAh g−1 at −20 °C and 60 °C. The gel polymer electrolyte before and after working at different temperatures was characterized, and the ion transport was analyzed to explore the physical reasons for the degradation of the gel polymer electrolyte membrane interface. Therefore, this work provides a certain theoretical basis for improving the stability of solid-state lithium-ion batteries.

Source: Gels

DOI: 10.3390/gels12020121

Authors: Renji Tan, Xinghua Liang, Qiankun Hun, Chunbo Lan, Lingxiao Lan, Yifeng Guo

Institutions: Guangxi University of Science and Technology, Chengdu University

Language: English

Topic: Advanced Battery Materials and Technologies

Subfield: Electrical and Electronic Engineering

Field: Engineering

Domain: Physical Sciences

SDG: Affordable and clean energy

Open Access status: gold

Estimated APC paid: $2,534