Possibilities for battery application of CoxByHz colloid particles

被引：20

作者：

Mitov, M ^{[1
]}

Popov, A

Dragieva, I

机构：

[1] South West Univ, Dept Chem, Blagoevgrad, Bulgaria

[2] Bulgarian Acad Sci, Cent Lab Electrochem Power Sources, Sofia, Bulgaria

来源：

COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS | 1999年 / 149卷 / 1-3期

关键词：

borohydride reduction; CoxByHz; colloid particles; electrode structure; hydrogen storage; metal hydride electrodes;

D O I：

10.1016/S0927-7757(98)00398-7

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Amorphous CoxByHz colloid particles, produced by borohydride reduction process for aqueous CoSO4 solution, were studied for their possible application to metal hydride rechargeable batteries. Electrodes, prepared from powders by pressing and sintering, were tested in 20% KOH solution by means of cyclic voltammetry and chronopotentiometry. The influence of pressure and sintering temperature applied on the electrode performance was elucidated. Electrodes, prepared under low pressure (20-30 MPa) and sintering temperature (200-300 degrees C) show the best characteristics in respect of the hydrogen electrochemical absorption-desorption. Crystallization of powders, occurring at higher temperatures, causes a considerable decrease in amount of sites available for hydrogen storage. A discharge capacity of 250 mA h g(-1) was attained with electrodes possessing amorphous structure. (C) 1999 Elsevier Science B.V. All rights reserved.

引用

页码：413 / 419

页数：7

共 12 条

[1]

ANANI A, 1993, 183 M EL SOC EL SOC, P82

[2]

ANANI A, 1992, P S HYDR STOR MAT BA, P105

[3] ELECTROCHEMICAL ADSORPTION-DESORPTION OF HYDROGEN ON AMORPHOUS NI40NB60 IN ALKALINE MEDIA [J].