n_(Al)∶n_(Ni)值对掺Al α-Ni(OH)_2结构及性能的影响  

Effects of n_(Al)∶n_(Ni) molar ratio of Al-substituted α-Ni(OH)_2 on structure and performance

作　　者：周勤俭[1] 覃事彪[1] 袁庆文[1] 王利君[1] 殷春梅[1] 

机构地区：[1]长沙矿冶研究院湘潭电源材料分部,湖南长沙410012

出　　处：《电源技术》2005年第4期208-210,249,共4页Chinese Journal of Power Sources

基　　金：湖南省自然科学基金资助项目(02 JJY 2016)

摘　　要：在不同nAl∶nNi(摩尔比)条件下,采用化学共沉淀法合成制备了掺Al琢-Ni(OH)2,对其进行了X射线衍射表征和扫描电镜、比表面积及电性能等分析测试。结果表明,掺Al琢-Ni(OH)2的晶格参数(d003)、比表面积、粒径均随着nAl∶nNi的增加而减小;nAl∶nNi增至20%时,制品呈现出单一的琢-Ni(OH)2结构;晶格参数(d003)小、结晶规整有序的琢-Ni(OH)2具有很高的放电容量(0.2C放电容量为350mAh·g-1)及稳定的电化学循环性能。α-Ni(OH)2 with different nAl∶nNi molar ratio were prepared by chemical co-deposition method and characterized by XRD and SEM, specific surface area,charge-discharge cyclic measurements. The results show that structure parameter, speci-fic surface area, particle size of α-Ni(OH)2 decreased with the increasing of the nAl∶nNi molar ratio .When nAl∶nNi molar ratio increased to 20%, only α phase presented in the sample. α-Ni(OH)2 with smaller cell parameter , complete and order crystal structure have high specific capacity(350 mAh·g-1,0.2 C) and very good charge-discharge cyclic stability.

关 键 词：掺Alα-Ni(OH)2 nAl=nNi(摩尔比) 电化学性能 

分 类 号：TM912.2[电气工程—电力电子与电力传动]