Investigation of germanium selenide electrodes for the integrated photo‐rechargeable battery

Abstract

Autonomous photo-rechargeable electronic energy storage device has become a new type of solution to the problems of renewable energy fluctuations and storage. The combination of light conversion equipment and energy storage equipment improves the packaging efficiency of the equipment, however how to explore a type of electrode materials for energy collection and storage become a real challenging issue. Here, we try to explore the GeSe nanoparticles as the potential idea electrode for the integrated photorechargeable battery. On the one hand, GeSe nanoparticle electrode shows good Li + storage performances. At the current density of 0.2 A g −1 , its reversible capacity is 670 mAh g −1 after 100 cycles. On the other hand, during the photo-voltaic measurement, GeSe electrodes could generate a photocurrent that increases by 8 uA/cm 2 under the visible light irradiation in aqueous electrolyte. When LiClO 4 in polycarbonate solvent is used as the electrolyte, the electrons move in the reverse direction from the GeSe electrode, form reverse current, reduce Li + to lithium metal, and finally store light energy into chemical energy in a short time. Considering its presenting behaviors in Li + storage and photon harvesting, our research proposed the possibility for the application of GeSe materials in the integrated photo-rechargeable batteries. K E Y W O R D Senergy conversion and storage, germanium selenide, photo-charge, photovoltaic

Photorechargeable Lead-Free Perovskite Lithium-Ion Batteries Using Hexagonal Cs3Bi2I9 Nanosheets

“…Despite these issues, several recent advances in this field suggest a promising future for photobatteries. − In 2017, Paolella et al reported the photo-oxidation of LiFePO 4 nanocrystals under illumination in a two electrode battery system; however, the energy conversion efficiency was only 0.06–0.08% . GeSe nanoparticles have been reported as electrodes for a photorechargeable battery, showing a current increase of 8 μA·cm –2 under visible light illumination, although germanium may be very expensive for this application . Most recently, zinc-ion and lithium-ion batteries consisting of V 2 O 5 as the photocathode containing poly­(3-hexylthiophene-2,5-diyl) (P3HT) and reduced graphene oxide (rGO) which help in separation of photoinduced charges are reported with the first discharge efficiencies of 1.2% under 12 mW/cm 2 and 0.22% under 1 sun, for the zinc and lithium ion, respectively. , More materials suitable for high performance lithium-ion photobatteries (PHBATs) have yet to be identified, even though Li-ion is by far the most commonly used battery for cell phones, personal electronics, and transportation vehicles.…”

Photo-rechargeable Zinc-Ion Capacitors using V2O5-Activated Carbon Electrodes

“…Recently, there have been some developments toward electrodes of batteries and capacitors that can directly harvest solar power without the need for solar cells, thereby offering an elegant solution for the challenges listed above. ,− Here, we present new light rechargeable electrochemical capacitors. In general, electrochemical supercacacitors have drawn attention in the scientific community because of their high power density, fast charge, long cycling life, and safe operation .…”

Vanadium dioxide–zinc oxide stacked photocathodes for photo-rechargeable zinc-ion batteries

“…Compared to classic systems where solar cells and batteries are separate devices, photo-batteries offer a more compact design without the need for external electronics to match the output of the energy solar cell to the battery. Therefore, a range of different materials have been considered for photo-batteries, including, for instance, halide perovskites, 2,3 organic molecules, 4 vanadium pentoxide, 5,6 germanium selenide, 7 and titanium dioxide. 8 Most photoelectrodes are fabricated by physically mixing of electrode materials with conductive additives, charge transfer materials and binders followed by casting on a collector electrode.…”