Al2(WO4)3/SrWO4 electrode modified by date kernel-derived carbon for electrochemical hydrogen storage

Abstract

The nanocomposites for hydrogen storage were designed using three components: Al2(WO4)3, SrWO4, and carbon. The sonochemical method was used to prepare binary Al2(WO4)3/SrWO4 nanocomposites (AW/SW) in the presence of Schiff-base ligand of H2acacen as capping agent by modifying the sonication power and compared with precipitation synthesis. The carbon component was derived from Date kernel powder and synthesized by biomass method as Date kernel derived carbon (DKC). Designed ternary nanocomposites made of Al2(WO4)3/ SrWO4/DKC were used as the electrode material in the cell of the hydrogen storage system. The dosage of DKC and ratios of AW:SW were the two parameters that were evaluated with regard to their influence on the hydrogen storage capacity. CV and charge-discharge chronopotentiometry methods were utilized in order to investigate the nanocomposites of Al2(WO4)3/SrWO4/DKC and their electrochemical characteristics. At a current of 1 mA, the discharge capacity of Al2(WO4)3/SrWO4/DKC nanocomposites, which make up 5 % of the DKC component, was measured at 406 mAhg???? 1. The Al2(WO4)3/SrWO4/DKC nanocomposites showed enough capability as a prospective and promising active material for hydrogen storage devices, according to the results.