摘要
介绍了表征MH-Ni电池用β-Ni(OH)2的X射线衍射(XRD)方法。利用这些方法测试和分析不同来源的β-Ni(OH)2样品。结果表明:不同制备方法和不同工艺所得β-Ni(OH)2的晶粒形状、大小和层错几率明显不同;初始β-Ni(OH)2的微结构参数与充放电性能有一定的对应关系;初始β-Ni(OH)2的微结构参数在充放电过程以及循环过程都发生变化,这种变化的进程还受充放电条件和循环条件的影响。阐明了综合评价β-Ni(OH)2的必要性和重要性,最后提出综合评价β-Ni(OH)2的宏观参数和微观参数。
X-ray diffraction method of characterizing raw β -Ni（OH）2 for Ni-MH battery were described. The samples from different sources were examined and analyzed by this method. Research results show that： （1） The shape and size of crystallite as well as stacking fault probability in raw β-Ni（OH）2 are dependent on their preparation technique;（2）The microstructure parameters of β-Ni （OH）2 and electrochemical specific capacity have corresponding relationship; （3）After charge-discharge and cycle-lifetime testing, shape and size as well as fault probability of the crystallites in β-Ni（OH）2 are changed. The extent of these effects are dependent on circulate conditions. The necessary and importance of comprehensive evaluating β-Ni（OH）2 were illuminated. Finally macroand micro-parameters of evaluating β-Ni（OH）2 were proposed.
出处
《电源技术》
CAS
CSCD
北大核心
2008年第6期392-397,共6页
Chinese Journal of Power Sources
基金
上海市科委科研计划项目基金资助(0552nm0.25)
