Effect of electrochemically oxidized carbon colloid on lead acid batteries

摘要

An aqueous solution of carbon colloid was prepared by electrochemical oxidation of a graphite anode. It was found that the addition of this colloid into the electrolyte of lead acid batteries enhanced the charge-discharge capacity and extended life. The mechanism for this could be as follows: As a result of electrochemical oxidation the surface of the carbon particles is subjected to a chemical modification, and is endowed with hydrophilic groups such as carboxyl.