直接回收锰酸锂制备超级电容器MnS材料的研究  

A Study of Direct Recovery of Li Mn2O4 and Its Use as the Mn S Material for Manufacturing Supercapacitors

作　　者：缪建麟 常毅 蔡俊超 朱显峰[1] 赵瑞瑞[1] MIAO Jianlin;CHANG Yi;CAI Junchao;ZHU Xianfeng;ZHAO Ruirui(School of Chemistry and Environment,South China Normal University,Guangzhou 510006,China;Guangzhou Energy Testing Institute,Guangzhou 511400,China)

机构地区：[1]华南师范大学化学与环境学院,广州510006 [2]广州市能源检测研究院,广州511400

出　　处：《华南师范大学学报（自然科学版）》2019年第2期45-49,共5页Journal of South China Normal University(Natural Science Edition)

基　　金：国家质检总局科技计划项目(2017QK146);广东省博士启动基金项目(2017A030310307)

摘　　要：通过将锂离子电池正极锰酸锂废料直接回收制备超级电容器MnS材料的方法,研究锰酸锂废料的再生利用.将正极废料溶解浸出后,调整废料浓度并加入硫源,经水热反应得到MnS材料.采用X射线衍射分析(XRD)、扫描电子显微镜(SEM)观察、透射电子显微镜(TEM)观察、比表面积分析(BET)等表征手段和电化学性能测试对MnS材料进行了研究.结果显示:水热法制备的MnS具有良好的晶体结构和较好的电容器特性;浸出液中Mn^2+浓度对最终产物的形貌、比表面积均有影响,其中当Mn^2+浓度为0.5mol/L时,可以得到三维花状辐射结构,该辐射结构有利于提升电解液与材料之间的表面接触性能,从而促进材料的电容性能.该研究为锂离子电池正极材料的回收提供了新的思路.The LiMn2O4 scraps recovered from spent Lithium ion batteries is converted into MnS,which can be used as an active material for manufacturing supercapacitors. The cathode scrap is dissolved and leached firstly,then the concentration of the leaching solution is adjusted with S-sources,and finally the MnS material is obtained by heating the leaching solution. The XRD,SEM,TEM and BET results show that the MnS can exhibit excellent crystal structure and good capacitor property. Some interesting results are obtained by investigating the impacts of Mn ^2+ concentration on the performance of the final products. The Mn^ 2+ concentration has vital impact on the morphology and specific surface area of the MnS product. When the Mn ^2+ concentration equals to 0.5 mol/L,MnS with 3D flower-like radiating structure can be obtained. This structure can enhance the contact between the material and the electrolyte,resulting in better electrochemical performance. This study can provide a new way for recycling of cathode scraps,which is worth further investigation.

关 键 词：锂离子电池 回收 锰酸锂 MNS 超级电容器 

分 类 号：O646[理学—物理化学]