首页> 外文会议>8th Asian Conference on Solid State Ionics: Trends in the New Millennium; Dec 15-19, 2002; Langkawi, Malaysia >STUDY OF THE CHARGE TRANSFER PROCESS OF LaNi_5 TYPE ELECTRODES IN Ni-MH BATTERIES
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STUDY OF THE CHARGE TRANSFER PROCESS OF LaNi_5 TYPE ELECTRODES IN Ni-MH BATTERIES

机译:Ni-MH电池中LaNi_5型电极电荷转移过程的研究

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摘要

As a result of the charge process of LaNi_5 type electrode, hydrogen is reversibly absorbed on the electrode surface. The process consists two principal steps. During the both processes, the first reaction step occurs in the interface solid/liquid, negatively charged, with high static electric field, where the double layer structure became more compact. The transfer of charge under high electric field depends on many factors, principally on compositions of the electrode materials. Effects on that of Co, Fe, Mn substitutes, with different concentrations, have been comparatively studied using electrochemical technique. The analyse of interface C - V study results has been realised, respecting Mott-Schottky relation. Optimal contents of some additives have been discussed. Some advantages of the applied electrochemical methods have been confirmed. The mechanism of the charges transfer and of the hydrogen reversible storage in the crystal structure in the batteries has been discussed. With the proposed mechanism, one can more explicitly understand the difference of the magnetic effect of the electrode materials before and after charge-discharge process can be explained.
机译:通过LaNi_5型电极的充电过程,氢可逆地吸附在电极表面。该过程包括两个主要步骤。在这两个过程中,第一步反应发生在带高静电场的带负电的固体/液体界面中,双层结构变得更加紧凑。高电场下的电荷转移取决于许多因素,主要取决于电极材料的组成。使用电化学技术已比较研究了不同浓度的Co,Fe,Mn替代品的影响。考虑到Mott-Schottky关系,已经实现了界面C-V研究结果的分析。已经讨论了一些添加剂的最佳含量。已经证实了所应用的电化学方法的一些优点。讨论了电池中晶体结构中电荷转移和氢可逆存储的机理。利用所提出的机制,可以更清楚地理解可以解释在充放电过程之前和之后电极材料的磁效应的差异。

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