Comparative study on microstructure of β-Ni(OH)_(2) as cathode material for Ni-MH battery

作     者：LOU Yuwan YANG Chuanzheng ZHANG Xigui MA Liping XIA Baojia 

作者机构：The Research Center of Semiconductor Functional Film Engineering TechnologyNano Technology LaboratoryShanghai Institute of Micro-system and Information TechnologyChinese Academy of SciencesShanghai 200050China 

出 版 物：《Science China(Technological Sciences)》 (中国科学(技术科学英文版))

年 卷 期：2006年第49卷第3期

页      面：297-312页

核心收录：

学科分类：0810[工学-信息与通信工程] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0802[工学-机械工程] 0702[理学-物理学] 0812[工学-计算机科学与技术（可授工学、理学学位）] 

基　　金：supported by the Shanghai Nanometer Science Foundation of China(Grant No.0552nm025) 

主　　题：microstructure β-Ni(OH)_(2) Ni-MH battery XRD 

摘      要：Microstructures such as micro-strain,crystallite as well as stacking faults can result in broadening of X-ray diffraction *** on least square principle,new com-putation method and programs,which can separate the two-fold broadening effect caused by crystallite/stacking faults and which can separate the three-fold broadening effect caused by crystallite/residual stress/stacking faults,have been *** a result,mi-cro-strain and crystallite sizes as well as stacking fault probability can be calculated re-spectively and investigated in *** the microstructures ofβ-Ni(OH)_(2)are investi-gated by means of these *** main results are as follows:1)The shape and size of crystallite as well as stacking fault probability of rawβ-Ni(OH)_(2)are dependent on its preparation technique.2)Activation changes the microstructure ofβ-Ni(OH)_(2).It transforms the crystallite shape from short-fat cylinder into polyhedrons or nearly equiaxial *** also alters the residual strain states and stacking fault probability.3)After charge-discharge and cycle-lifetime testing,the crystallites ofβ-Ni(OH)_(2)are fined further and its residual strain and fault probability were *** extent of these effects are dependent on circulating conditions.4)Calcium additive inβ-Ni(OH)_(2)restrains grain fining process and turns twin fault into deformation fault.5)Comprehensive analysis reveals that micro structural parameters ofβ-Ni(OH)_(2)are correlated with some performance of Ni-MH battery.