期刊
ELECTROCHEMISTRY
卷 84, 期 8, 页码 578-584出版社
ELECTROCHEMICAL SOC JAPAN
DOI: 10.5796/electrochemistry.84.578
关键词
Batteries; F-SiO2 Density; Electrochemical Behaviour; Testing
资金
- Zhejiang Chaowei Power Co., Ltd.
The effect of fumed silica (F-SiO2) density on the performance of valve-regulated lead-acid (VRLA) batteries, including the conductivity of H+ ions and the diffusion of HSO4- ions in the gel electrolyte, the redox capacity of lead, and the evolution of hydrogen and oxygen, have been studied over a wide range of F-SiO2 densities. The results show that the influence of F-SiO2 density is not monotonous and always yields a maximum (or inflection) effect at c. 5 to 6 wt% silica, before and after which the effect of F-SiO2 differ. At lower F-SiO2 densities, in general, gel formation favours an improvement of the electrochemical behaviour. However, it may produce an adverse effect on the electrochemical properties if F-SiO2 density further increases. Battery tests at a range between 1 to 3 wt% silica support this observation, in which the discharge capacity, the utilisation of active materials, and the charge efficiency are all enhanced. (C) The Electrochemical Society of Japan, All rights reserved.
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