A Nonaqueous Potassium-Based Battery-Supercapacitor Hybrid Device.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 29603424.
- Also identified by DOI 10.1002/adma.201800804.
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Abstract
A low cost nonaqueous potassium-based battery-supercapacitor hybrid device (BSH) is successfully established for the first time with soft carbon as the anode, commercialized activated carbon as the cathode, and potassium bis(fluoro-slufonyl)imide in dimethyl ether as the electrolyte. This BSH reconciles the advantages of potassium ion batteries and supercapacitors, achieving a high energy density of 120 W h kg<sup>-1</sup> , a high power density of 599 W kg<sup>-1</sup> , a long cycle life of 1500 cycles, and an ultrafast charge/slow discharge performance (energy density and power density are calculated based on the total mass of active materials in the anode and cathode). This work demonstrates a great potential of applying the nonaqueous BSH for low cost electric energy storage systems.