In Situ Cross‐Linking and Interfacial Engineering via Multifunctional Diamine Additive for High‐Temperature Magnesium Metal Batteries
Abstract
AbstractThe electrolyte and its interfacial chemistry are crucial for the development of high‐temperature magnesium metal batteries. Here, a robust in situ cross‐linked gel polymer electrolyte (MgB@CGPE) and its derived Mg3N2‐rich (Mg3N2 and related Mg─N─H complexes) interphase are obtained by a multifunctional diamine additive. The Mg3N2‐rich interphase exhibits low magnesium ion migration activation energy and can effectively inhibit the continuous decomposition of electrolyte at the interface under elevated temperatures. Moreover, the MgB@CGPE can enable reversible magnesium deposition and dissolution over a wide temperature range of 30–180 °C. The assembled Mo6S8//MgB@CGPE//Mg cells demonstrate stable cycling over 200 cycles at 150 °C with 80% capacity retention. Additionally, these cells also address crucial mechanical and thermal safety concerns, indicating their potential for use under extreme conditions. This work presents a universal and practical strategy for designing polymer electrolytes that operate at elevated temperatures.
Article Details
Authors (11)
Mingao Chen
Qingdao Industrial Energy Storage Research Institute Qingdao Institute of Bioenergy and Bioprocess Technology Chinese Academy of Science Qingdao 266101 P.R. China
Shu Zhang
Xuesong Ge
Qingdao Industrial Energy Storage Research Institute Qingdao Institute of Bioenergy and Bioprocess Technology Chinese Academy of Science Qingdao 266101 P.R. China
Zhilin Yang
Gaohao Sun
Qingdao Industrial Energy Storage Research Institute Qingdao Institute of Bioenergy and Bioprocess Technology Chinese Academy of Science Qingdao 266101 China
Aobing Du
State Key Laboratory of Photoelectric Conversion and Utilization of Solar Energy, Qingdao New Energy Shandong Laboratory, Qingdao Institute of Bioenergy and Bioprocess Technology Chinese Academy of Sciences Qingdao China
Jingwen Zhao
Qingdao Industrial Energy Storage Research Institute, Qingdao Institute of Bioenergy and Bioprocess Technology
Shengting Li
QingHai Salt Lake Industry Co., Ltd. Golmud 816000 China
Ju Xiao
Qinghai Salt Lake Industry Co., Ltd Geermu China
Hongliang Li
Hefei National Research Center for Physical Sciences at the Microscale
Guanglei Cui
Qingdao Industrial Energy Storage Research Institute, Qingdao Institute of Bioenergy and Bioprocess Technology