Working Mechanisms for Enhanced Interface Stability and Electrochemical Properties in Dual‐Salt Polymer Electrolyte with In‐Situ Electrolyte‐Cathode Integration
Year: 2025
Type: article
Abstract: Solid polymer electrolytes (SPEs) have attracted much attention due to their excellent flexibility, strong interfacial adhesion and good processibility. However, the incompatibility at the electrode/electrolyte interface often results in increased impedance and rapid capacity attenuation. In this work, dual‐salt composite solid electrolytes (CSEs) with an integrated electrolyte/cathode structure are prepared by in‐situ ultraviolet (UV) photopolymerization. With the addition of the lithium difluoro(oxalato)borate (LiDFOB), a robust, stable and low‐resistance solid‐electrolyte interface (SEI) layer is established during electrochemical reduction, eventually improving the overall performance of all solid‐state lithium batteries (ASSLBs). The Li||Li symmetric cells with RTS‐TH‐2 % LiDFOB ASSLB exhibit stable cycling for over 2000 h at at 0.1 mA cm−[email protected] mAh cm−2. LiFePO4||Li cells deliver a high discharge capacity (155 mAh g−1 at 0.5 C) and cycling stability (with the retention rate of more than 90 % at 0.5 C after 100 cycles) at 60 °C. This work provides a facile strategy to enhance electrodes compatibility with poly (ethylene glycol) acrylates (PEGAs)‐based electrolytes.
Source: Chemistry - A European Journal
Authors: Zehua Chen, Shengguang Qi, Wenwu Zou, Li Du
Language: English
Subfield: Electrical and Electronic Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: bronze
OpenAlex ID: W4408243759