Warrier, P.C. and Vasudeva, P.V. (1988) Characterisation of sample of silica for use in gel type maintenance free lead acid batteries. Bulletin of Electrochemistry , 04 (08). pp. 731-736. ISSN 0256-1654

PDF - Published Version
Download (436Kb) | Preview


Silica based gel electrolyte has been used as one of the routes in the development of maintenance free lead acid batteries. Both precipitated silica samples and pyrogenic silica have been characterised in terms of their properties, namely, apparent density, particle size and size distribution, surface area, acid absorption etc. The samples show a wide variation in apparent density values, the pyrogenic samples having the lowest value. The particle size distribution of the pyrogenic sample is not as expected, probably because of the difference in the particle shape and formation of agglomerates. Acid absorption values also show a regular increase with the fineness of the silica sample. It is also found that the pyrogenic sample forms a gel suitable for battery electrolyte with sulphuric acid alone while the other samples require a gelling agent for repelling the silica particles and for catalysing the cross linking of siloxane groups. The finer the sample, the better the conductivity as well as the performance of the battery using the gel electrolyte. Temperature is also having an influence in the formation of the gel, high temperature accelerating the gel formation and low temperatures retarding the same. The keeping quality of the gel is also found to be good. Test results of a few small capacity batteries with gel electrolyte are presented and compared with those with pure sulphuric acid

Item Type: Article
Uncontrolled Keywords: Maintenance free lead acid batteries; Gel electrolyte; Thixotropy; Silica
Subjects: Electrochemical Power Sources
Depositing User: ttbdu cecri
Date Deposited: 21 Mar 2012 05:32
Last Modified: 21 Mar 2012 05:32
URI: http://cecri.csircentral.net/id/eprint/1594

Actions (login required)

View Item View Item