Pb <sub>3</sub> (OH) <sub>2</sub> (CO <sub>3</sub> ) <sub>2</sub> -Acetylene Black Composites for Enhanced Hydrogen Evolution Reaction Inhibition of Lead-Acid Batteries
Jie Hu, Fei Yang, Changgan Lai, Helin Wang, Nie Liu, Jian Sun, Huan‐Xiang Zhou, Lixu Lei
Abstract
Pb 3 (OH) 2 (CO 3 ) 2 -acetylene black (BLC/AB) composite is successfully prepared by a simple and economical sonochemical method and employed as a negative additive for lead-acid batteries (LABs). The electrochemical measurements show that the obtained BLC/AB electrodes have a higher hydrogen evolution reaction (HER) overpotential compared to AB electrode. BLC/AB-2 and BLC/AB-4 battery deliver the excellent rate performance at 1C rate. What’s more, acetylene black as nucleation centers of Pb 3 (OH) 2 (CO 3 ) 2 may considerably alleviate irreversible sulfation phenomenon of negative plate, thus enhancing the conductivity and extending the cycle life. Interestingly, the cycle life (1172) of BLC/AB-2 battery is 1.44 times that of the same amount of AB battery (814) at 1C rate. Therefore, the BLC/AB composite is a promising negative additive of LABs.