V2O5 + Zinc Oxide Smart Supercapacitor
https://news.clemson.edu/harnessing-the-power-of-the-sun-researchers-design-a-smart-supercapacitor-that-harvests-and-stores-solar-energy/
Researchers design a smart supercapacitor that harvests and stores solar energy
Excerpt
With the push for renewable energy, researchers from Clemson University and the Indian Institute of Science have designed a smart supercapacitor using a novel stack of metal oxides — vanadium pentoxide and zinc oxide — that can efficiently harvest energy from sunlight and simultaneously store it.
Like batteries, supercapacitors store and release electricity. But unlike batteries, supercapacitors don’t need a chemical reaction to store energy. Instead, electric charge is stored electrostatically, which allows supercapacitor to be rapidly charged and discharged. The research could pave the way for future self-charging consumer electronics such as health monitoring devices.