物理化学学报2025，Vol.41Issue(7)：114-124,11.DOI:10.1016/j.actphy.2025.100082
PEG-VN改性PP隔膜用于高稳定性高效率锂硫电池
PEG-VN modified PP separator for high-stability and high-efficiency lithium-sulfur batteries
摘要
Abstract
Lithium-sulfur(Li-S)batteries are regarded as one of the most promising candidates for next generation energy storage systems due to their high theoretical energy density.However,the practical application of Li-S batteries is limited by the low lithium ion(Li+)transport efficiency and the rapid capacity decay caused by the shuttle effect.Herein,we report a composite comprising Polyethylene glycol(PEG)and vanadium nitride(VN)nanosheets coated onto a commercial polypropylene(PP)separator,called PEG-VN@PP separator.The supercatalytic effect and adsorption properties exhibited by the VN nanosheets significantly enhance the conversion of polysulfides,thereby improving both the capacity and stability of Li-S batteries.Due to the coating of PEG,lithium ions are attracted to the polar functional groups,enabling selective transport,which improves the transport efficiency of Li+and the rate capability of Li-S batteries.The Li-S battery assembled with PEG-VN@PP exhibits a high specific capacity of 782.0 mAh·g-1 and an average capacity decay of 0.048%per cycle at 1C(1675 mA·g-1)for 700 cycles,using the carbon nanotubes/sulfur cathode with a sulfur mass loading of 1.2 mg·cm-2.关键词
氮化钒/聚乙二醇/隔膜修饰/穿梭效应/锂硫电池Key words
Vanadium nitride/Polyethylene glycol/Separator modification/Shuttle effect/Lithium-sulfur batteries分类
化学化工引用本文复制引用
石英彤,徐国桐,梁贵增,兰笛,张思远,王彦儒,李道浩,吴广磊..PEG-VN改性PP隔膜用于高稳定性高效率锂硫电池[J].物理化学学报,2025,41(7):114-124,11.基金项目
The project was supported by the National Natural Science Foundation of China(52302272,52377026),Taishan Scholars and Young Experts Program of Shandong Province(tsqn202211124,tsqn202103057),the Natural Science Foundation of Shandong Province(ZR2022QB023,ZR2024ME046),the Qingchuang Talents Induction Program of Shandong Higher Education Institution(Research and Innovation Team of Marine Polysaccharides Fibers-based Energy Materials),the State Key Laboratory of Bio-Fibers and Eco-Textiles,Qingdao University(ZKT10,GZRC202006).国家自然科学基金(52302272,52377026),山东省泰山学者青年专家计划(tsqn202211124,tsqn202103057),山东省自然科学基金(ZR2022QB023,ZR2024ME046),山东省高等学校青创人才引育计划"海洋多糖纤维基能源材料研究创新团队"及青岛大学生物纤维与生态纺织品国家重点实验室(ZKT10,GZRC202006)资助项目 （52302272,52377026）
