Abstract
This study demonstrates the use of perovskite solar cells for fabrication of self-charging lithium-ion batteries (LIBs). A LiFePO4 (LFP) cathode and Li4Ti5O12 (LTO) anode were used to fabricate a LIB. The surface morphologies of the LiFePO4 and Li4Ti5O12 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 LiFePO4-Li and Li4Ti5O12-Li half cells and of the full cell were investigated. The LiFePO4-Li4Ti5O12 full cell showed an excellent Coulombic efficiency of 99.3% after 100 cycles. CH3NH3PBI3 (MAPbI3) 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%.
Highlights
With the rapid depletion of fossil fuels, the global concern over environmental issues has increased and extensive efforts are being invested in the development of novel systems for energy production and storage [1,2,3]
The intermittent nature of solar energy is a major disadvantage that limits its widespread application. This limitation can be overcome with the use of lithium-ion batteries (LIBs), which can be directly coupled to solar power generators [4,5]
Electric vehicles are very important from an environmental standpoint as they do not produce CO2 emissions
Summary
With the rapid depletion of fossil fuels, the global concern over environmental issues has increased and extensive efforts are being invested in the development of novel systems for energy production and storage [1,2,3]. A few studies have been carried out on the use of solar energy as a self-charging source for LIBs. In 2012, Guo et al fabricated an integrated power pack consisting of a dye-sensitized solar cell and LIB using double-sided TiO2 nanotube arrays [18]. The LIB charged for 8 min at 3 V and showed a discharge capacity of 33.89 μAh, the overall photoelectric conversion and storage efficiency of the device were very low. The solar cell-LIB coupling device showed a discharge capacity of 240 μAh/cm and a storage efficiency of 78%. A coupling device consisting of four high-efficiency single PSCs connected in series and an LFP-LTO LIB was developed. In order to develop a self-charging LIB, four single series-connected PSCs were coupled with an LFP-LTO battery
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