Specific behavior of transition metal chloride complexes for achieving giant ionic thermoelectric properties

Abstract When people are keen to exploring the thermoelectric properties of polymer composite inorganic electrolyte aqueous flexible electronic devices, complicated chemical configuration transition metal chloride anion has not been paid attention and reported. Here, we demonstrate a hydrated polyvinyl alcohol (PVA)-cellulosic membrane that relies on thermal gradient diffusion complexe [CuCl 4 ] 2− enhanced by copper-coordinated carboxylated cellulose. The PVA-cellulosic exhibits thermopower −26.25 mV·K −1 , rendering it among best n-type ionic materials under same conditions. We attribute thermally generated voltage highly-coordinated Cu 2+ - Cl − which converts independent motion Cl− higher ion transport heat via cellulose, while this phenomenon do occur in other chlorides. This specific behavior important implications designing high-quality materials.