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
• 来源期刊: 稀有金属（英文版）
• 年，卷（期）: 2021,（3）
• 所属期刊栏目: ORIGINAL ARTICLES
• 页码范围: 529-536
• 页数: 8页
• 语种: 英文

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 polysulfides,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.