title: Cross-linked Composite Gel Polymer Electrolyte using Mesoporous Methacrylate-Functionalized SiO2 Nanoparticles for Lithium-Ion Polymer Batteries.
abstract: Liquid electrolytes composed of lithium salt in a mixture of organic solvents have been widely used for lithium-ion batteries. However, the high flammability of the organic solvents can lead to thermal runaway and explosions if the system is accidentally subjected to a short circuit or experiences local overheating. In this work, a cross-linked composite gel polymer electrolyte was prepared and applied to lithium-ion polymer cells as a safer and more reliable electrolyte. Mesoporous SiO2 nanoparticles containing reactive methacrylate groups as cross-linking sites were synthesized and dispersed into the fibrous polyacrylonitrile membrane. They directly reacted with gel electrolyte precursors containing tri(ethylene glycol) diacrylate, resulting in the formation of a cross-linked composite gel polymer electrolyte with high ionic conductivity and favorable interfacial characteristics. The mesoporous SiO2 particles also served as HF scavengers to reduce the HF content in the electrolyte at high temperature. As a result, the cycling performance of the lithium-ion polymer cells with cross-linked composite gel polymer electrolytes employing methacrylate-functionalized mesoporous SiO2 nanoparticles was remarkably improved at elevated temperatures.
authors.affiliation: Department of Chemical Engineering, Hanyang University, Seoul 04763, South Korea.
authors.forename: Won-Kyung
authors.initials: WK
authors.lastname: Shin
authors.affiliation: Department of Chemical Engineering, Hanyang University, Seoul 04763, South Korea.
authors.forename: Jinhyun
authors.initials: J
authors.lastname: Cho
authors.affiliation: Department of Chemical Engineering, Hanyang University, Seoul 04763, South Korea.
authors.forename: Aravindaraj G
authors.initials: AG
authors.lastname: Kannan
authors.affiliation: Center for Energy Convergence, Korea Institute of Science and Technology, Seoul 02792, South Korea.
authors.forename: Yoon-Sung
authors.initials: YS
authors.lastname: Lee
authors.affiliation: Department of Chemical Engineering, Hanyang University, Seoul 04763, South Korea.
authors.forename: Dong-Won
authors.initials: DW
authors.lastname: Kim