Development of a Self-Charging Lithium-Ion Battery Using Perovskite Solar Cells

This study demonstrates the use of perovskite solar cells for fabrication of self-charging lithium-ion batteries (LIBs). A LiFePO(4) (LFP) cathode and Li(4)Ti(5)O(12) (LTO) anode were used to fabricate a LIB. The surface morphologies of the LiFePO(4) and Li(4)Ti(5)O(12) powders were examined using field emission scanning electron microscopy. The structural properties of the two powders were investigated using X-ray diffraction. The electrochemical properties of the LiFePO(4)-Li and Li(4)Ti(5)O(12)-Li half cells and of the full cell were investigated. The LiFePO(4)-Li(4)Ti(5)O(12) full cell showed an excellent Coulombic efficiency of 99.3% after 100 cycles. CH(3)NH(3)PBI(3) (MAPbI(3)) perovskite solar cells (PSCs) were fabricated using a spin coating technique. A single PSC showed a power conversion efficiency of 12.95%. In order to develop a self-charging system for LIBs, four single PSCs connected in series were used as an LFP-LTO battery. The integrated PSC system showed a power conversion efficiency of 12.44%. The PSC-LIB coupled device showed excellent overall self-charging conversion and a storage efficiency of 9.25%.