废旧镍氢电池在柠檬酸中的溶解条件及Ni_(0.5)Co_(0.5)Fe_2O_4的制备研究  

Dissolution conditions with spent Ni-MH batteries in the citric acid and preparation of Ni_(0.5)Co_(0.5)Fe_2O_4 nanocrystals

作　　者：席国喜[1] 张文[1] 席跃宾 许会道[1] 姚路[1] 

机构地区：[1]河南师范大学化学化工学院河南省环境污染控制重点实验室,河南新乡453007

出　　处：《电子元件与材料》2015年第8期56-60,共5页Electronic Components And Materials

基　　金：国家自然科学基金重点项目资助(No.51174083);教育部博导基金项目资助(No.20114104110004)

摘　　要：研究了废旧镍氢电池正极材料在柠檬酸中的溶解条件。采用单因素和正交试验相结合的方法分析柠檬酸初始浓度、液固比、溶解温度、溶解时间等对钴、镍的溶解率的影响。实验结果表明:当柠檬酸浓度为2 mol/L,液固比(质量比)8:1,溶解温度90℃,溶解时间50 min,镍钴的溶解率最高。在最佳溶解条件下,采用微波水热法制备出性能较好的球形纳米级Ni0.5Co0.5Fe2O4,其磁性参数为:饱和磁化强度为50.312 A·m2/kg,剩余磁化强度15.306 A·m2/kg,矫顽力为0.052 726 T。The dissolution conditions of spent Ni-MH batteries anode material with citric acid were studied. The concentration of citric acid, liquid-solid mass ratio, reaction time and reaction temperature were optimized with orthogonal and single factor experiments. The results show that the optimized dissolution conditions are as follows： concentration of citric acid of 2 mol/L, liquid-solid mass ratio of 8：1, reaction time of 50 min and reaction temperature of 90℃. Nanocrystal Ni-Co ferrites were synthesized by microwave-hydrothermal method. The remnant magnetization （Mr）, coercivity （Hc） and saturation magnetization （Ms） of the product prepared under these conditions are 15.306 A·m^2/kg, 0.052 726 T and 50.312 A·m^2/kg, respectively.

关 键 词：废旧镍氢电池 柠檬酸 正交试验 微波水热法 磁性材料 镍钴铁氧体 

分 类 号：TQ174.75[化学工程—陶瓷工业]