摘要
纳米氢氧化镍材料是一种高效的镍电极材料 ,纳米级镍电极的制备方法对镍电极电化学性能的影响很大。研究结果表明 :分散处理的纳米氢氧化镍颗粒制备的镍电极在容量与放电平台方面高于未处理的电极 ;纳米复合镍电极的电化学性能优于纳米镍电极。分散处理的纳米氢氧化镍颗粒组装而成的纳米复合镍电极电化学性能超过了常规球镍电极。纳米颗粒团聚的减轻与纳米颗粒的流动性 ,使纳米复合电极的导电性能与质子传导性能明显改善是分散处理纳米复合镍电极具有优良电化学性能的原因。
Nanometer Ni(OH) 2 was a promising active material for nickel electrode. However, their electrochemical performances were affected greatly by the fabrication methods of nanoscale nickel electrode. The results show that nickel electrode with dispersed nanometer nickel hydroxide has higher capacity and plateau than that with non-dispersed one; nanocomposite nickel electrode has higher capacity and plateau than pure nanometer nickel electrode. Nanocomposite nickel electrode with dispersed nanometer nickel hydroxide has excellent comprehensive electrochemical performance than conventional spherical nickel electrode. The reason that dispersed nanocomposite electrode has excellent electrochemical performance is that lower aggregations and more fluidity of nanometer nickel hydroxide improve the electric contact and proton diffusion path, decrease the reaction resistance and increase the use efficiency of active materials.
出处
《电源技术》
CAS
CSCD
北大核心
2001年第B05期146-147,共2页
Chinese Journal of Power Sources
