【作者】 王英； 肖方明； 唐仁衡； 卢其云； 彭能；

【Author】 Wang Ying Xiao Fang-ming Tang Ren-heng Lu Qi-yun Peng Neng (Research Institute of Rare Metal,Guangzhou Research Institute of Non-Ferrous Metals,Guangzhou 510651,China)

【机构】 广州有色金属研究院稀有金属研究所；

【摘要】 本文对镍氢动力电池用 AB₅型纳米晶贮氢合金热处理工艺进行了研究。分别采用 X 射线衍射、金相、PCI 测试手段分析热处理后贮氢合金的微观结构与吸放氢动力学性能。贮氢合金的电性能测试结果表明,经过950 ℃×6h 热处理的贮氢合金,10C 放电比容量可以达到241mAh/g,循环寿命大于500次,分别以7C,10C 放电, 高倍率放电率（HRD）为92．5%,85．2%。将贮氢合金粉组装成电池进行测试,2min 后,放电平台电压为1．143V, 以10C 放电,300次循环后,电池容量衰减率较小。更多还原

【Abstract】 The annealing process of hydrogen storage alloy is studied.X-ray diffraction,metallurgical microscope and PCI (Pressure-Composition-Isotherms)measure are used to analyze the microstructure and absorption/desorpfion hydrogen kinetics properties of alloy.The electrochemical experimental results show that the discharge capacity of the alloy,after heat-treated at 950℃ for 6h,can reach 241mAh/g,the life of more than 500 cycles at 10C.Its high-rate discharge ability(HRD)is 92.5%,85.2% at 7C,10C,respectively.As the power battery is set up with the alloy,after 2min at 10C,the discharge voltage plateau is 1.143V,and the capacity loss rate of battery is less after 300 cycles.更多还原