文章基本信息

标题：Electrochemical behaviors of graphene decorated sulfurized polyurethane foam-based ultra-microporous carbon
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作者：Xianxian Zhou ; Min Li ; Chao Ge 等
期刊名称：E3S Web of Conferences
印刷版ISSN：2267-1242
电子版ISSN：2267-1242
出版年度：2020
卷号：213
页码：1-7
DOI：10.1051/e3sconf/202021302008
出版社：EDP Sciences
摘要：Polyurethane foam is a typical commercial polymer with a large production quantity and its waste needs to be recycled. This work reports a facile method to prepare ultra-microporous carbon from the polyurethane foam (PUF) waste and use it as a reservoir to impregnate sulfur for Li-S batteries. The raw PUF was carbonized and then activated with KOH. By controlling the activation temperatures, four carbon materials (PUFC-T) with different textures and N-doping levels were obtained. PUFC-800 shows the highest BET surface area, microporous volume, and quaternary N and pyridine N-oxide species. The electrochemical test results showed that higher microporous volume is beneficial to increase the uniform distribution of sulfur, as a result, the cycle stability and rate capacity is improved significantly. A large reversible capacity of 542 mAh g -1 can be retained at a large current of 0.5 C after 200 cycles with high sulfur loading of 70%.