Novel Synthesis and Structural Investigations of ZnSO4/MgCl2 Composite Hydrated Salt for Enhanced Thermochemical Heat Storage Applications

Abstract

Thermochemical materials MgCl2 and ZnSO4 have been investigated in depth on larger energy density, chemical stability and larger dehydration/hydration output in view of space heat application. The selection of these materials was based on a recent review on all possible salt hydrates, within the frame of a thermochemical heat storage density and considering current advances in heat storage application. ZnSO4⋅7H2O and MgCl2⋅6H2O were robust with a specific mixing ratio which upgrade materials to a new level of energy. The as-prepared composites significantly improved cyclability, heat of absorption and desorption. The study suggested that hydration/dehydration performance of Zm2 composite shows promising ability among various mixing composites ratios. The TG-DSC result highlighted that compare with pure ZnSO4 and MgCl2, heat storage performance of derived Zm2 40 and 53% increased, respectively. Moreover, among these thermochemical materials, cyclability test of Zm2 composite showed a promising result.