Fabrication of the Reduced Graphene Oxide/Activated Carbon Composite Modified by PbSO4 as Ternary Additive to Negative Plate of Lead Acid Battery

Abstract In this paper reduced graphene oxide/Activated Carbon(rGO/AC, GAC) composite modified by PbSO4(PbSO4-rGO/AC, PGAC) as the additive to Negative Active Material(NAM) of Lead Acid Battery(LAB) was fabricated and its effect on High Rate Partial State of Charge(HRPSoC) cycle life was investigated. To fabricate PGAC, the powder of AC was added to graphene oxide suspension and reduced by glucose. GAC powder was immersed in Pb2+ solution to allow ion exchange and the final product PGAC composite was obtained. X ray Diffration (XRD) and Scanning Electron Microscopy(SEM) was used for the structural characterization of the PGAC and electrochemical measurement was carried out by using Cyclic Voltametry(CV), Linear Sweep Voltametry(LSV), Galvanostatic Charge-Discharge(GCD). The results showed that the addition of PGAC composite(PbSO4:GAC= 26:74 wt. ratio) to NAM at 2wt.% increased HRPSoC cycle life by 343% from 14768 to 65477.