抑制锌枝晶的新型负极材料ZnSO_(4)·3Zn(OH)_(2)·H_(2)O@石墨烯的制备  

Preparation of new anode material ZnSO_(4)·3Zn(OH)_(2)·H_(2)O@graphene to suppress zinc dendrites

作　　者：张蕾 陈嘉武 侯之国 张雪倩 ZHANG Lei;CHEN Jiawu;HOU Zhiguo;ZHANG Xueqian(School of Chemical and Environmental Engineering,Jiangsu University of Technology,Changzhou 213001.China)

机构地区：[1]江苏理工学院化学与环境工程学院,江苏常州213001

出　　处：《精细石油化工进展》2021年第6期54-58,共5页Advances in Fine Petrochemicals

基　　金：江苏省高等学校自然科学研究面上项目“水系钠离子电池电解液改性及界面作用机制的研究”(90100022018);江苏理工学院研究生实践创新计划项目“层状过渡金属硫化物纳米材料的制备及其电化学性能的研究”(XSJCX20-13)。

摘　　要：锌的可充电电池有良好的电化学性能,但锌枝晶的问题会导致其库伦效率降低,发生短路,甚至形成"死锌"。利用沉淀法制备新型复合材料ZnSO_(4)·3Zn(OH)_(2)·H_(2)O@石墨烯作为电池的负极,使用2 mol/L K_(2)SO_(4)作为电解液,利用沉淀-溶解机制以达到实现抑制锌枝晶的目的。采用X线衍射仪(XRD)对循环前后的负极材料进行表征,用电子扫描显微镜(SEM)观察其形貌,结果表明,制备的新型负极材料在2 mol/L K_(2)SO_(4)电解液中能够完成1000次全放电/充电循环,库伦效率接近100%,容量保持80%,可以有效抑制锌枝晶,以实现电池的长循环稳定性。Zinc rechargeable battery has good electrochemical performance,but the problem of zinc dendrite will reduce coulomb efficiency,short circuit and even form"dead zinc".In this paper,a new composite ZnSO_(4)·3Zn(OH)_(2)·H_(2)O@graphene was prepared by precipitation method as the negative electrode of the battery,2 mol/L K_(2)SO_(4) as the electrolyte,and the precipitation dissolution mechanism was used to inhibit the zinc dendrite.The negative electrode materials before and after cycling were characterized by X-ray diffraction(XRD),and their morphology was observed by electron scanning microscope(SEM).Results show that the new cathode material could complete 1000 full discharge/charge cycles in 2 mol/L K_(2)SO_(4)electrolyte,the coulomb efficiency was close to 100%,the capacity was maintained at 80%,and the zinc dendrite could be effectively inhibited to realize the long cycle stability of the battery.

关 键 词：羟基硫酸锌 石墨烯 抑制锌枝晶 负极材料 新型铅电池 

分 类 号：TB332[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]