天津工业大学学报2023，Vol.42Issue(6)：67-73,7.DOI:10.3969/j.issn.1671-024x.2023.06.010
硫化聚丙烯腈凝胶的制备及其锂硫电池性能
Preparation and lithium sulfur battery performance of sulfurized polyacrylonitrile gel
摘要
Abstract
In order to improve the electrochemical performances of sulfurized polyacrylonitrile(SPAN)cathode material,polyacrylonitrile gel(dennoted as PANg)was prepared via thermally induced phase separation method using dimethyl sulfoxide as the solvent and deionized water as non-solvent.The introduction of hydrazine hydrate caused N-N crosslinking between the molecular chains of PANg to produce a chemically crosslinked polyacry-lonitrile gel(dennoted as PANg+N).The vulcanized polyacrylonitrile gel(dennoted as SPANg+N)was obtained by high-temperature sulfurization method.The structure and phase characteristics of materials were studied by SEM,TEM,FTIR,XRD and other methods.The results show that SPANg+N with crosslinked structure has a highly interconnected three-dimensional network structure with significantly improved structural stability and electrochemical properties.At a current density of 0.5 C,the discharge specific capacity of the material is 1 219.8 mA·h/g at the first turn,and it can still maintain 1 000.6 mA·h/g after 100 cycles,with a capacity re-tention rate of 82.03％and an average attenuation of 0.18％per cycle.关键词
锂硫电池/硫化聚丙烯腈/凝胶/热致相分离法Key words
lithium-sulfur battery/vulcanized polyacrylonitrile/gel/thermally induced phase separation分类
化学化工引用本文复制引用
赵永男,李杨,高海燕..硫化聚丙烯腈凝胶的制备及其锂硫电池性能[J].天津工业大学学报,2023,42(6):67-73,7.基金项目
国家自然科学基金资助项目(21703152) （21703152）
天津市青年科学基金资助项目(17JCQNJC06100) （17JCQNJC06100）
南开大学先进能源材料化学教育部重点实验室开放基金项目 （）
