Thermal analysis of nano-crystallite phosphate containing composite paint enables for energy storage materials

Abstract

The different proportions of cobalt phosphate-containing nano-crystallite composite paints have been synthesized with CaCO3 and polyvinyl acetate adhesive. The abbreviations of these composite paints are CPM2, 2.50% Co-3(PO4)(2), CPM4, 4.49% Co-3(PO4)(2), and CPM6, 6.52% Co-3(PO4)(2). The specific heat capacity (C-p) of all these composite paints is found endothermic. The optimum value of C-p is observed for CPM2 composite paint among all paints. At 298 K, C-p of composite paints are 1.00 J g(-1) K-1 for CPM2, 0.88 J g(-1) K-1 for CPM4, and 0.81 J g(-1) K-1 for CPM6. The C-p of Co-3(PO4)(2) is 0.94 J g(-1) K-1 at 298 K. The similar to 80% reflectance of polyvinyl acetate containing CaCO3 paint is reduced to similar to 30% with the addition of 6.52% Co-3(PO4)(2). The composite paints are found semiconducting behavior due to band gap E-g 2.15 eV at lambda(max) = 576 nm. The crystallite size of the CPM6 composite paint is 59.64 nm.