NaOH电解液改善MH/Ni电池自放电性能的机理研究

李晓峰

doi:10.61558/2993-074X.1704

电化学 >

2006 , Vol. 12 >Issue 1: 85 - 88

DOI: https://doi.org/10.61558/2993-074X.1704

研究论文

NaOH电解液改善MH/Ni电池自放电性能的机理研究

李晓峰

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郑州轻工业学院材料与化工学院,郑州轻工业学院材料与化工学院,郑州轻工业学院材料与化工学院,郑州轻工业学院材料与化工学院河南郑州450002,河南郑州450002,河南郑州450002,河南郑州450002

收稿日期: 2006-02-28

修回日期: 2006-02-28

网络出版日期: 2006-02-28

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Mechanism of Self Discharge Performance Improvement in the Ni-MH Batteries with NaOH Electrolyte

LI Xiao-feng~

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(*),XIA Tong-chi,DONG Hui-chao,WEI Yan-wei(Department of Material and Chemical Engineering,Zhengzhou University of Light Industry,Zhengzhou 450002,Henan,China

Received date: 2006-02-28

Revised date: 2006-02-28

Online published: 2006-02-28

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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.

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

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李晓峰 . NaOH电解液改善MH/Ni电池自放电性能的机理研究[J]. 电化学, 2006 , 12(1) : 85 -88 . DOI: 10.61558/2993-074X.1704

Abstract

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 H_2 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.

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