二步法回收废旧MH/Ni电池正极材料

Recycling of positive electrode material of MH/Ni by two-step method

采用超声波振荡、稀硫酸浸出二步法分离并回收废旧MH/Ni电池的正极材料和泡沫镍基片等。氨配位沉淀法重制Ni(OH)2,与超声波振落材料混合为正极再生原料,装配成模拟MH/Ni电池,测定其不同倍率恒电流充放电性能。结果表明,超声波振荡可回收约70%正极材料,配以稀硫酸浸取,正极材料总回收率94%。0.2C～5.0C充放电的放电比容量证实回收再生的正极材料能基本满足MH/Ni电池的性能要求。

The cathode materials and foam nickel substrate were separated and recycled by two-step method of super-sonic oscillation and dilute sulphudc acid acidolysis. Ni （OH）2 was prepared by ammonia coordinate precipitation method, which was mixed with the metal hydride as the recycled cathode material to assemble the stimulant MH/Ni battery. The charge and discharge performance of the stimulant MH/Ni battery was tested under different constant currents. The results show that 70% of cathode material can be recycled by super-sonic oscillation, and after dilute sulphuric acid acidolysis, total recovery rate of cathode material can reach 94%. The discharge specific capacity of the stimulant batteries between 0.2 C-5.0 C prove that the recycled cathode material can meet the performance requirements of MH/Ni battery.