稀土对光伏系统用VRLA电池Pb-Sb板栅合金电化学性能的影响  

Effect of rare earth on electrochemical performance of Pb-Sb alloy for VRLA batteries used in solar energy photovoltaic power system

作　　者：黄琼[1] 苏勇[2] 阮伟 周玉婷[2] 洪应[1] 谢军[1] 

机构地区：[1]安徽职业技术学院电气工程系,安徽合肥230011 [2]合肥工业大学材料科学与工程学院,安徽合肥230009 [3]安徽海容电源动力有限公司,安徽合肥238014

出　　处：《合肥工业大学学报（自然科学版）》2012年第11期1546-1549,共4页Journal of Hefei University of Technology：Natural Science

基　　金：安徽省高等学校省级自然科学研究资助项目(kj2012B080)

摘　　要：文章采用循环伏安法、交流阻抗法分别对添加不同稀土质量分数的光伏系统用VRLA蓄电池Pb-Sb板栅合金进行电化学性能测试。结果表明:随着合金中稀土质量分数的增加,在氧化过程中临界钝化电流先增大后减小,氧化反应由易到难;随着PbSO4/Pb峰的峰电位向正向移动,电流减小,从而有利于深放电循环,克服早期容量衰减现象;添加稀土元素后,改变了腐蚀膜的厚度及电导,致使膜的孔隙率发生改变,合金表面的极化电阻及腐蚀膜阻抗增大,阻碍合金的进一步腐蚀,提高了合金的耐腐蚀性。Electrochemical performance of Pb-Sb alloy for VRLA batteries used in solar energy photo- voltaic power system with different contents of rare earth was investigated by means of cyclic voltam- metry and alternating current voltammetry. It is found that critical passivation current first increases then decreases and the oxidation reaction is more and more difficult along with the increasing content of rare earth elements. The peak potential of PbSO4/Pb is moved toward positive and the current de- creases which is favorable to further discharge circulation to overcome the primary capacitance attenu- ation. The thickness and electric conductivity of corrosion layer are changed along with the increasing content of rare earth elements which converts the porosity and increases the polarization resistance and impedance on the surface. The transformation can increase the corrosion resistance of low antimony alloy by hindering its further corrosion.

关 键 词：稀土 光伏发电 铅锑合金 电化学性能 

分 类 号：TM912.9[电气工程—电力电子与电力传动]