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Researchers in China unveiled a novel kind of solar device that makes possible energy generation and storage in a single unit rather than installing solar panels and batteries. The new design incorporates solar redox flow battery technology (SRFB).
In an SRFB, energy is stored as a result of reversible chemical reaction in liquid electrolytes. Although a promising technology, available SRFB systems have encountered a lot of problems such as the corrosion of the photoelectrodes and poor efficiency for converting sunlight radiation into electricity.
To address the above issues, here a team from Nanjing University of Technology developed the chemical compatibility of the components of the SRFB.
The photocathode used for the device was commercial ternary amorphous silicon solar cells (3jn-a-Si) that were cut into space 2×2 cm modules with the substrate from a stainless steel and indium tin oxide coated.
The charging of the battery was done under the light of a xenon lamp that simulated sunlight, and the system stood more than 10 charge/discharge cycles. It proved solar-energy-to-electricity conversion efficiency of 4.2%.
This is a marked step farther for direct solar-chemical storage technologies.
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