We herein report a method for reducing lead-alloy positive grid corrosion in lead acid batteries by developing a polypyrrole (ppy) coating on to the surface of lead-alloy grids through potentiostatic polymerization technique. The experimental results demonstrate that the presence of ppy coating significantly enhances the corrosion resistance and inhibits the oxygen evolution rate as compare to bare grids. C-rate studies of 2 V/2.6 Ah lead-acid cells show 15 - 20% improvement in capacity at low charge-discharge rates (C/20- C/5) and 10% at high C rates (C/2 and 3C) for the cells with ppy coating grids in relation to conventional lead-acid cells. © 2019 The Electrochemical Society.

Surendra Kumar Martha

Department of Chemistry

V. Naresh

L. Elias

S.A. Gaffoor

Indian Institute of Technology Hyderabad (IITH) is a premier institute of science and technology established in 2008. IITH has been consistently ranked in the&nbsp;<a href="https://iith.ac.in/reports/" rel="noopener noreferrer">top 10 institutes</a>&nbsp;in India for Engineering&nbsp;<a href="https://www.nirfindia.org/2021/EngineeringRanking.html" rel="noopener noreferrer" target="_blank">according to NIRF</a>&nbsp;making it one of the most coveted schools for science and technology in the country.

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Journal	Journal of the Electrochemical Society
Publisher	Electrochemical Society Inc.
ISSN	00134651