闪锌矿结构的硫化锌修饰隔膜在锂硫电池中的应用  

Application of sphalerite structured zinc sulfide-modified separators in lithium-sulfur batteries

作　　者：杨道通 吴桐[1] 贾铭勋 秦小茜 刘景海[1] Yang Daotong;Wu Tong;Jia Mingxun;Qin Xiaoxi;Lui Jinghai(Nano Innovation Institute(NII),Inner Mongolia Key Laboratory of Carbon Nanomaterials,Inner Mongolia Engineering Research Center of Lithium-Sulfur Battery Energy Storage,College of Chemistry and Materials Science,Inner Mongolia Minzu University,Tongliao 028000)

机构地区：[1]内蒙古民族大学化学与材料学院纳米创新研究院内蒙古自治区纳米碳材料重点实验室,锂硫电池储能内蒙古自治区工程研究中心,通辽028000

出　　处：《化工新型材料》2022年第12期104-108,116,共6页New Chemical Materials

基　　金：内蒙古民族大学博士科研基金项目(BS614);国家自然科学基金(21961024);内蒙古自然科学基金项目(2018JQ05和2019BS02007);内蒙古自治区科技成果转化资助项目(CGZH2018156和2019GG261);IMUN研究生科研项目(S20191195Z);IMUN研究生科研项目(NMDSS2133);2020年度自治区本级事业单位引进优秀人才科研启动绩效项目(RCQD20002)。

摘　　要：锂硫电池作为新一代锂二次电池拥有更为广阔的发展前景,但其本身也存在一定缺陷。例如,发生在锂硫电池内部的穿梭效应,严重影响了电池的电化学性能。采取适用于工业化生产的简单方法,一步固相法合成硫化锌(ZnS),将其用于隔膜的表面修饰。结果表明,合成的ZnS是闪锌矿结构,具有不规则的块体形貌,将其涂布在隔膜正极侧表面能够有效抑制锂硫电池的穿梭效应,改善电化学循环寿命,0.1C下首次放电比容量为1090mAh/g, 1C倍率下为600mAh/g,在0.5C下,可以稳定循环1000圈,平均每圈衰减率仅为0.057%。Lithium-sulfur batteries, as novel lithium secondary batteries, have enormous potential for future energy storages.However, there are still many defects needed to be solved before their large-scale applications.For example, the shuttle effect that occurs inside lithium-sulfur batteries seriously affects the electrochemical performance of the batteries.Taking a simple method suitable for industrial production, one-step solid-phase method was used to synthesize zinc sulfide(ZnS),which was further applied for the surface modification of separators.The research results showed that the synthesized ZnS had a sphalerite structure with an irregular bulk morphology.Coating it on the positive side surface of the separator enabled effectively to inhibit the shuttle effect of lithium-sulfur batteries and improve the electrochemical cycle life.The first discharge specific capacities were 1100 mAh/g at 0.1 C and 600 mAh/g at 1 C.In addition, the lithium-sulfur batteries could be recycled 1000 times at 0.5 C with only 0.057% deceasing for each cycle.

关 键 词：锂硫电池 穿梭效应 隔膜修饰 硫化锌 

分 类 号：TQ152[化学工程—电化学工业] TM912[电气工程—电力电子与电力传动] O646[理学—物理化学]