锌镍电池负极放电产物X射线衍射研究  

Studies by XRD on discharge products of negative electrode in Zn-Ni battery

作　　者：唐有根[1] 唐赞谦[1] 桑商斌[1] 

机构地区：[1]中南大学化学化工学院化学电源与材料研究所,湖南长沙410083

出　　处：《电池工业》2005年第1期7-10,共4页Chinese Battery Industry

摘　　要：用化学方法合成了化学组成为Ca(OH)2·2Zn(OH)2·2H2O的锌酸钙,并用X射线衍射进行了证实。用机械的方法制备了氧化锌和氢氧化钡的混合物,并将锌酸钙和锌钡混合物作为锌负极活性物质,组装成模拟锌镍电池,采用X射线衍射研究了负极活性物质放电产物的物质形态变化和放电产物中各物相量的变化趋势。实验结果表明:锌负极活性物质为锌酸钙时,锌负极放电产物氧化锌部分地与氢氧化钙复合成锌酸钙。锌负极活性物质为氧化锌和氢氧化钡混合物时,氢氧化钡与溶于电解液中的二氧化碳复合成碳酸钡,氧化锌不能与氢氧化钡复合,很快溶于碱性电解液中。The compound of calcium zincate,of which the composition was Ca(OH)_2·2Zn(OH)_2·2H_2O,was prepared by a chemical method.The crystal structure was verified by XRD.The mixture of zinc oxide and barium hydroxide was prepared by a mechanical method.The calcium zincate and the mixture of zinc oxide and barium hydroxide were used for active materials in negative electrode of Zn-Ni battery.The mock up Zn-Ni battery was assembled.The morphology changes of discharge productions of active materials in cathode and the changing trend of quantity of components were studied by XRD.The results of XRD showed that,in negative electrode whose active materials was prepared by the calcium zincate,when battery was discharged,the discharge products — zinc oxide partly changed into calcium zincate by combining with calcium hydroxide;in cathode whose active materials was prepared by the mixture of zinc oxide and barium hydroxide,barium hydroxide changed into barium carbonate by combining with carbon dioxide which was dissolved in electrolyte and zinc oxide can not combine with barium hydroxide and it was dissolved in electrolyte quickly.

关 键 词：锌镍电池 锌酸钙 锌钡混合物 X射线衍射 

分 类 号：TM912.9[电气工程—电力电子与电力传动]