Photo-charging polymeric sodium-ion cell based on YSZ/PVDF film

A cost-effective, light-weighted, and easy to handle photochargeable Na-ion power cell (NPPC) has been demonstrated by integrating solar active solid electrolyte poly(vinyl alcohol)-carbon black-V2O5-Na2SO4 and a high dielectric YSZ/PVDF film in a very simple and unique way. An open circuit voltage of similar to 1.18 V is obtained under photocharging of the NPPC by light with an intensity of similar to 110 mW/cm(2). The discharging phenomenon is investigated at a constant discharge current density of similar to 0.63 mA/cm(2). The reversible charging-discharging nature of the device is recorded repeatedly for 200 cycles to investigate the storage capacity. A maximum capacitance of similar to 2.84 mF/cm(2) is obtained with an energy density and a power density of similar to 5.6 mWhr/m(2) and similar to 7.4 W/m(2), respectively. The high storage impact of NPPC is realized in practical by glowing blue light emitting diodes for two days with high intensity.