Bio-polymer poly(lactic acid) thin film-based K-ion-associated photo-rechargeable power cell

A very simple, low-cost and bio-compatible photo-induced K-ion-based power cell has been developed using an aqueous electrolyte solution of PVA-WO3-ZnO-K2HPO4 and poly(lactic acid) film. After investigation of the charging and discharging phenomenon the maximum open circuit voltage is obtained similar to 1 V under light intensity similar to 110 mW/cm(2). Then the device is discharged with a constant discharge current density similar to 0.5 mA/cm(2). The sturdiness of K-ion photo-power cell is also verified by observing the charging-discharging data repeatedly for 200 cycles. It shows similar to 16 F/m(2) storage capacity with energy density and power density similar to 2.22 mWh/m(2) and similar to 5 W/m(2), respectively. A commercially available LED also driven by our fabricated power cell for showing its practical application possibilities.

Automated summary

A low-cost and bio-compatible photo-induced K-ion-based power cell has been developed, showing a maximum open circuit voltage of around 1V under light intensity of 110 mW/cm(2). The cell demonstrated a storage capacity of approximately 16 F/m(2) with energy density and power density of around 2.22 mWh/m(2) and 5 W/m(2) respectively. Additionally, a commercially available LED was successfully powered by this fabricated power cell, demonstrating its practical application possibilities.