摘要
以NaOH电解液代替KOH能够明显改善MH/N i电池的自放电性能和高温(60℃)充电效率.电化学阻抗和循环伏安测试表明,NaOH电解液的作用可能是改变了H原子于负极表面的吸(脱)附行为,并在一定程度上抑制了负极的析氢过程,从而改善了电池的自放电性能.
The self-discharge performance and charge efficiency at 60 ℃ for Ni-MH battery can be markedly enhanced by using NaOH electrolyte instead of KOH electrolyte. Both the results of electrochemical impedance spectroscopy and cyclic voltammetry tests indicate that the separation of H2 from the negative electrode may be partly blocked in the former because of the change of the adsorption/desorption behavior of H on the surface of the negative electrode, thus results in an improvement of self-discharge performance of the battery.
出处
《电化学》
CAS
CSCD
北大核心
2006年第1期85-88,共4页
Journal of Electrochemistry
基金
河南省教育厅基金项目(200510462012)资助
关键词
金属氧化物-镍电池
自放电
NaOH电解液
电化学阻抗谱
循环伏安
Nickel-metal-hydride battery, Self-discharge, NaOH electrolyte, Electrochemical impedance spectroscopy, Cyclic vohammetry
