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A solar battery is a rechargeable battery that integrates a solar cell with battery power storage.
A second meaning of solar battery are rechargeable batteries which have been developed specifically for use in photovoltaic systems or are just used for. They are used especially in stand-alone systems for storage of energy produced by solar panels and batteries as a buffer when major consumer operation. Often, the term is also commonly used for built-in solar power applications batteries, even if they are not specified for it.
History
The first solar battery was developed in 2014 by researchers at Ohio State University. The researchers used a dye-sensitized solar cell using ruthenium that stores the power that it uses air to decompose and re-form lithium peroxide. It used three electrodes rather than the typical four. It featured a lithium plate base, two layers of electrode separated by a thin sheet of porous carbon and a titanium gauze mesh that played host to a dye-sensitive photoelectrode. Porous materials allowed the battery's ions to oxidize into lithium peroxide, which chemically decomposes into lithium ions and stored as lithium metal. The device used conventional liquid electrolyte consisting of part salt and part solvent (perchlorate mixed with organic solvent dimethyl sulfoxide.
In 2015 the same team announced modifications to their design such that compared with traditional lithium iodine batteries, energy savings reached 20 percent. The new design no longer needs air to pass through it in order to function. Water was the solvent and lithium iodide is the salt. The result is a water-based electrolyte and a prototype now classed as an aqueous flow battery. The device is topped with a solid solar panel in a single solid sheet. Over 25 charge/discharge cycles, the battery released around 3.3 volts. While typical batteries are charged with 3.6 volts and discharge at 3.3 volts, the solar flow battery only needed 2.9 volts to charge with the solar panel making up the difference, almost 20 percent.
Another team wired four perovskite solar cells in series to enhance the voltage and photo-charge lithium batteries with 7.8% efficiency. Perovskite solar cells have active materials with a crystalline structure identical to the mineral perovskite. Perovskite cells convert a broader spectrum of sunlight into electricity than conventional silicon-based cells.
See also
References
- Solar-Akku für Selbstversorgung, abgerufen am 14. November 2013.
- Yu, Mingzhe; Ren, Xiaodi; Ma, Lu; Wu, Yiying (3 October 2014). "Integrating a redox-coupled dye-sensitized photoelectrode into a lithium–oxygen battery for photoassisted charging". Nature Communications. 5: 5111. doi:10.1038/ncomms6111.
- Lavars, Nick (August 3, 2015). "World's first "aqueous solar flow battery" outperforms traditional lithium-iodine batteries". www.gizmag.com. Retrieved 2015-12-13.
- Mayhood, Eric (August 28, 2015). "Researchers efficiently charge a lithium-ion battery with solar cell". Research & Development. Retrieved 2015-12-13.
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