摘要
用X射线衍射等方法分析了MH/Ni电池电极过程中电极活性材料β-Ni(OH)2和AB5合金的精细结构和微结构的变化,并把其与电池性能联系起来,从而揭示了充放电过程的物理现象和物理机制.分析发现:MH/Ni电池的物理导电机制是氢离子在正负极间的定向迁移和运动,氢离子是由氢原子离开和β-Ni(OH)2来提供,而不是由β-Ni(OH)2→β-NiOOH的相变来提供.
The fine structure and microstructure changes of electrode active materials β-Ni（OH）2 and AB5 alloy during charge-discharge processes are studied in detail by X-ray diffraction （XRD）. Chemical physical of electrode active materials and physical conductive mechanism are elucidated. To be brief, the physical conductive mechanism of MH/Ni battery is the directional migrating and moving of hydrogen ions between the positive and negative electrodes because hydrogen atoms are deviating from the β-Ni（OH）2 lattice and inserting into AB5.
出处
《吉首大学学报（自然科学版）》
CAS
2009年第6期54-58,共5页
Journal of Jishou University(Natural Sciences Edition)
基金
上海科学技术专项基金资助项目(09QT1402100)
上海博士后科研基金资助项目(09R21420400)
关键词
化学物理
MH/NI电池
相结构和微结构
X射线衍射
chemical physics
MH/Ni battery
phase structure and microstructure
X-ray diffraction （XRD）
