纳米氧化锌对镍氢电池电化学性能的影响  

Influence of Nanometric Zinc Oxide on the Electrochemical Performance of Nickel Metal Hydride Batteries

作　　者：陈其猛[1] 易双萍[1] 赵渺[1] 

机构地区：[1]广东工业大学,广东广州510006

出　　处：《稀有金属材料与工程》2010年第A01期39-42,共4页Rare Metal Materials and Engineering

基　　金：广东省自然科学基金(9151009001000052);广东省科技计划项目(2008B010600010;2006B14701009)

摘　　要：采用均匀沉淀法制备纳米氧化锌,将其作为添加剂掺杂制备MH/Ni电池正极,研究正极中添加不同质量分数的纳米ZnO对电极电化学性能的影响,初步探讨纳米氧化锌在电极内部的反应机制。结果表明,掺杂后氢氧化镍电极的导电性提高,电化学活性增强,有效地提高了活性物质的利用率,改善了电极反应的传质和传荷条件,使电极中电活性粒子具有合理的分布,因而显示出良好的电化学性能。经过比较,添加质量分数为4%的纳米ZnO电化学性能最佳,在60周和80周时放电容量仍有282和272mAh·g-1,而且放电平台较高。Nanometric zinc oxide was prepared by the method of homogeneous precipitation, and used as additive to prepare the positive electrode of MH/Ni battery. The influence of electrochemistry performance was investigated in positive electrode with different mass fraction of nanometric ZnO. Nanometric ZnO in the mechanism of electrode internal response was discussed. The results indicate that doped nickel hydroxide electrode increased its conductivity and electrochemical activity, also improved the utilization of active material effectively, and the conditions of electrode reaction to transfer mass and load, which made the particles of electrical activity reasonably distribute in the electrode, so it shows a good electrochemical performance. After comparison, nanometric ZnO of 4% addition leads to better electrochemistry performance. Discharge capacity in the 60 and 80 cycles still has 282 and 272 mAh·g^-1 respectively, also with higher discharge platform.

关 键 词：纳米氧化锌 MH/NI电池 氢氧化镍电极 电化学性能 

分 类 号：TM912.2[电气工程—电力电子与电力传动]