文献类型：期刊文献

英文题名：High-Safety and Long-Life Silicon-Based Lithium-Ion Batteries via a Multifunctional Binder

作者：Liu, Hua[1];Chen, Tongqing[1];Xu, Zhixin[2];Liu, Zuozhen[1,3];Yang, Jun[2];Chen, Jianding[1]

机构：[1]East China Univ Sci & Technol, Sch Mat Sci & Engn, Shanghai 200237, Peoples R China;[2]Shanghai Jiao Tong Univ, Shanghai Electrochem Energy Devices Res Ctr, Sch Chem & Chem Engn, Shanghai 200240, Peoples R China;[3]Sino Polymer Co Ltd, Shanghai 200237, Peoples R China

年份：2020

卷号：12

期号：49

起止页码：54842

外文期刊名：ACS APPLIED MATERIALS & INTERFACES

收录：;EI(收录号：20205109663588);WOS:【SCI-EXPANDED(收录号:WOS:000599505200057)】；

基金：This work was supported by the National Natural Science Foundation of China (grant number 21773154) and the National Key Basic Research Program of China (grant number 2014CB932303).

语种：英文

外文关键词：Li-ion battery; silicon anode; binder; flame retardant; safety

摘要：Lithium-ion batteries with high energy density and good safety are in urgent demand nowadays. Silicon has the advantages of high theoretical capacity, low cost, and vast reserves. It is regarded as an ideal anode material for high-energy lithium-ion batteries. Unfortunately, its huge volume change during cycling results in unstable cycle behavior and limits its application. To develop a robust electrode by employing effective binders is still a big challenge. Furthermore, both conventional binders and organic liquid electrolytes bring serious safety risks due to their flammability. Herein, a flame-retardant binder is designed and prepared by crosslinking polyacrylic acid (PAA) with a flame-retardant epoxy resin (FREP) containing phosphorus and nitrogen elements. Compared with PAA, it has better wettability to liquid electrolytes. Moreover, the three-dimensional PAA-FREP polymer binder not only provides sufficient mechanical strength to buffer the volume change of Si powders but also enhances the interfacial adhesion between the active film and Cu current collector via epoxy groups. Most importantly, the FREP component in the binder leads to admirable flame retardance. In these ways, the multifunctional binder exhibits excellent mechanical, electrochemical, and safety performances.