Researchers design PV-powered supercapacitor with high energy and power density
Researchers from Korea’s DGIST, Kyungpook National University, France’s University of Bordeaux (CNRS), Collège de France and Japan’s Komaba Institute for Science (KIS) recently designed a solar-powered faradaic supercapacitor, with a graphene layer as its anode, that can reportedly achieve a power density of 2,555.6 W kg and an energy efficiency of 63%. The system uses nickel-based compounds to enhance the electrochemical performance of its electrodes.
Schematic of the system. Image from: PV Magazine, credit: Daegu Gyeongbuk Institute of Science and Technology (DGIST)
To build these electrodes, the scientists used a nickel-based carbonate and hydroxide composite material, which are said to optimize their conductivity and stability. They initially tested transition metal ions such as manganese (Mn), carbon monoxide (Co), copper (Cu), iron (Fe), and zinc (Zn) and found that the optimal nanostructure of the electrodes depended on the transition metals used.
Source: http://www.graphene-info.com/researchers-design-pv-powered-supercapacitor-high-energy-and-power-density
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