基于PEO调控多硫化物的高比能锂硫电池设计  

Design of High Specific Energy Lithium-Sulfur Batteries Based on Polysulfides Regulation by PEO

作　　者：王鹏飞 梁运超 伊廷锋 WANG Pengfei;LIANG Yunchao;YI Tingfeng(School of Resources and Materials,Northeastern University at Qinhuangdao,Qinhuangdao 066004,China;School of Materials Science and Engineering,Northeastern University,Shenyang 110819,China)

机构地区：[1]东北大学秦皇岛分校资源与材料学院,河北秦皇岛066004 [2]东北大学材料科学与工程学院,沈阳110819

出　　处：《有色金属(中英文)》2025年第3期341-347,共7页Nonferrous Metals

基　　金：国家自然科学基金资助项目(22309027);中央高校基本业务费重大成果培育项目(N2423054)。

摘　　要：采用机械研磨法成功制备了S@KB/PEO正极材料,并研究了其电化学性能。XRD分析揭示了S@KB中硫的结晶性有所减弱,而SEM观察则确认了复合材料中硫的均匀分散。经过循环伏安测试,该材料展现出了良好的可逆性。在0.5 C倍率的充放电测试中,S@KB和S@KB/PEO的放电比容量分别为853.1和921.9 mAh/g,表明PEO的添加提高了电池的可逆比容量。此外,电化学阻抗谱测试也证明了PEO的加入有效降低了电荷转移电阻。The S@KB/PEO cathode material was successfully prepared by mechanical grinding method and its electrochemical performance was studied.XRD analysis reveals a decrease in the crystallinity of sulfur in S@KB,while SEM observation confirms the uniform dispersion of sulfur in the composite material.After cyclic voltammetry testing,the material exhibits good reversibility.In the 0.5 C rate charge-discharge test,the discharge specific capacities of S@KB and S@KB/PEO are 853.1 and 921.9 mAh/g,respectively,indicating that the addition of PEO improves the reversible specific capacity of the battery.In addition,electrochemical impedance spectroscopy testing confirms that the addition of PEO effectively reduces the charge transfer resistance.

关 键 词：锂硫电池 PEO 吸附 催化 

分 类 号：TB34[一般工业技术—材料科学与工程] TM912[电气工程—电力电子与电力传动]