泡沫铅对VRLA电池负极活性物质结构及性能影响  

Effects of Lead Foam on Structure and Characteristic of Negative Active Materials in VRLA Batteries

作　　者：戴长松[1] 王殿龙[1] 伊廷锋[1] 胡信国[1] 姜兆华[1] 

机构地区：[1]哈尔滨工业大学应用化学系,哈尔滨150001

出　　处：《无机化学学报》2005年第12期1875-1879,共5页Chinese Journal of Inorganic Chemistry

基　　金：哈尔滨市科技攻关项目(No.2003AA5CG043)。

摘　　要：The surface morphology and composition of negative active material (NAM) both on the cast grid and on lead foam grid at the state of charge and discharge, in valve-regulated lead acid (VRLA) battery, were characterized by SEM and XRD, respectively. Moreover, the specific surface area and electrochemical impedance of the negative active material for both negative electrode grids were studied by chronoamperometry and EIS.The result indicates that after lots of cycles, compared with the cast grid, the sponge lead of the lead foam negative plate is smaller; the specific surface area increases by about 16%; the residual PbSO4 on the surface of the electrode is less at the state of charge. At the state of discharge, PbSO4 crystals on the surface of the negative plate of lead foam are smaller, and the specific surface area increases to 209%. EIS analysis shows that compared with the negative plate of cast grid, no matter what state the negative plate of lead foam is at, the electrochemical impedance of the material is lower.The surface morphology and composition of negative active material （NAM） both on the cast gnu and on lead foam grid at the state of charge and discharge, in valve-regulated lead acid （VRLA） battery, were charac- terized by SEM and XRD, respectively. Moreover, the specific surface area and electrochemical impedance of the negative active material for both negative electrode grids were studied by chronoamperometry and EIS. The result indicates that after lots of cycles, compared with the cast grid, the sponge lead of the lead foam negative plate is smaller; the specific surface area increases by about 16%; the residual PbSO4 on the surface of the electrode is less at the state of charge. At the state of discharge, PbSO4 crystals on the surface of the negative plate of lead foam are smaller, and the specific surface area increases to 209%. EIS analysis shows that compared with the negative plate of cast grid, no matter what state the negative plate of lead foam is at, the electrochemical impedance of the material is lower.

关 键 词：铅酸电池 负极活性物质 板栅材料 泡沫铅 

分 类 号：O614.433[理学—无机化学] TM912.1[理学—化学]