Exploiting methylated amino resin as a multifunctional binder for high-performance lithium-sulfur batteries  

作　　者：Xing-Xing Gu Zhen-Guo Yang Shuang Qiao Cheng-Bin Shao Xiao-Lei Ren Jing-Jing Yang 

机构地区：[1]Chongqing Key Laboratory of Catalysis and New Environmental Materials,College of Environment and Resources,Chongqing Technology and Business University,Chongqing 400067,China [2]Chongqing Jianfeng Industrial Group Co.,Ltd.,Chongqing 408601,China [3]GRINM Group Co.,Ltd.,Beijing 100088,China [4]Faculty of Civil Aviation and Aeronautics,Kunming University of Science and Technology,Kunming 650000,China

出　　处：《Rare Metals》2021年第3期529-536,共8页稀有金属（英文版）

基　　金：financially supported by the National Natural Science Foundation of China(Nos.51902036 and51865021);the Natural Science Foundation of Chongqing Science&Technology Commission(No.cstc2019jcyj-msxm1407);the Natural Science Foundation of Chongqing Technology and Business University(No.1952009);the Venture&Innovation SupportProgram for Chongqing Overseas Returnees(No.CX2018129);the Science and Technology Research Program of Chongqing Municipal Education Commission(Nos.KJQN201900826 and KJQN201800808);the Innovation Group of New Technologies for Industrial Pollution Control of Chongqing Education Commission(No.CXQT19023);the Open Research Fund of Chongqing Key Laboratory of Catalysis and New Environmental Materials(No.KFJJ2018082)。

摘　　要：The practical application of Li-S batteries is severely restricted by limited cycle life and low sulfur loading.Here,a common industrial paint,methylated amino resin(MAR),was employed as a novel multifunctional binder to address these issues.The S cathodes by using MAR binder(S@MAR) demonstrate an excellent reversible capacity of 480.9 mA·h·g^(-1) after 400 cycles at a rate of 0.5 C,and the sulfur loading in the electrode could achieve as high as 3.0 mg·cm^(-2).These achievements are ascribed to the superior mechanical property for volume expansion,better adsorption ability toward poly sulfides,and more favorable Li+transportation of MAR,compared to the conventional binders of polyvinylidene difluoride and carboxymethylcellulose.This study paves a new way for obtaining high-energy-density Li-S batteries by the simple application of multifunctional binder that are inherently cost-effective.

关 键 词：Methylated amino resin N-rich functional group Li-S batteries Superior mechanical property Polysulfides adsorption 

分 类 号：TM912[电气工程—电力电子与电力传动] TQ437.6[化学工程]