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Lead-acid battery; specific energy; polyaniline; corrosion

Lightweight grids for lead-acid battery grids have been prepared from acrylonitrile butadiene styrene (ABS) copolymer followed by coating with lead. Subsequently, the grids have been electrochemically coated with a conductive and corrosion-resistant layer of polyaniline. These grids are about 75% lighter than those employed in conventional lead-acid batteries. Commercial-grade 6V/3.5Ah (C₂₀-rate) lead-acid batteries have been assembled and characterized employing positive and negative plates constituting these grids. The specific energy of such a lead-acid battery is about 50 Wh/kg. The batteries can withstand fast charge-discharge duty cycles.

S K Martha¹ B Hariprakash¹ S A Gaffoor² D C Trivedi³ A K Shukla^{1 3}

1. Solid State and Structural Chemistry Unit, Indian Institute of Science, Bangalore - 560 012
2. NED Energy Ltd, 6-3-1109/1 Navbharat Chambers, Raj Bhavan Road, Hyderabad - 560 082
3. Central Electrochemical Research Institute, Karaikudi - 630 006

Published

January 2006