以废旧锌锰干电池制备LiNi_(1/3)Co_(1/3)Mn_(1/3)O_2及改性研究  

Study on preparation and modification of LiNi_(1/3)Co_(1/3)Mn_(1/3)O_2 with spent Zn-Mn batteries

作　　者：郭光辉[1] 卢康 肖峰 邱江华[1] Guo Guanghui;Lu Kang;Xiao Feng;Qiu Jianghua(Key Laboratory of Hubei Province for Coal Conversion and New Carbon Materials,Wuhan University of Science and Technology,Wuhan 430081,China)

机构地区：[1]武汉科技大学煤转化与新型炭材料湖北省重点实验室,湖北武汉430081

出　　处：《无机盐工业》2018年第10期70-73,共4页Inorganic Chemicals Industry

摘　　要：采用干湿结合回收技术回收了废旧锌锰干电池中的锰,讨论了硝酸浓度对碳酸锰回收率的影响。将得到的碳酸锰作为锰源,采用溶胶凝胶法制备了三元正极材料LiNi_(1/3)Co_(1/3)Mn_(1/3)O_2。通过沉积法使氢氧化铝胶体沉积在材料表面对三元正极材料进行表面包覆改性。而且对所得产品进行了XRD、TEM表征和电化学性能检测。结果表明,少量包覆不会改变材料的层状结构,材料首次放电比容量达到152 m A·h/g,且提高了循环性能,循环充放电100次后,放电比容量为117.3 m A·h/g。The manganese was recovered by hydrometallurgy recycling technology from spent Zn-Mn batteries,which was used as the manganese sources to synthesize ternary cathode materials(NCM)through sol-gel method.Moreover,the effect of nitric acid concentration upon the recovery rate of MnCO3 was discussed.Furthermore,surface modification was carried out with Al(OH)3 depositing on the surface.The structure and morphology of the coated cathode materials were characterized by X-ray diffraction(XRD),transmission electron microscopy(TEM)and charge-discharge test.Results showed that small quan-antities of Al(OH)3-coating had not affected the layer structure,and improved the cycling performance.The initial discharge specific capacity was 152 mA·h/g,even after 100 cycles,the LiNi1/3Co1/3Mn1/3O2 electrode still remained 117.3 mA·h/g.

关 键 词：废旧锌锰电池 锂离子电池 三元正极材料 包覆改性 

分 类 号：TQ131.11[化学工程—无机化工]