Method for preparing aqueous MnO2 ink and capacitive energy storage devices comprising MnO2

Jiasheng Qian (Inventor), Jikang Yuan (Inventor), Shu Ping Lau (Inventor)

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Abstract

In one aspect, the present disclosure relates to an improved method of preparing concentrated MnO2 ink with increased efficiency and cost effectiveness. The method involves mixing KMnO4 solution with highly crystalline carbon particles (HCCPs) with average diameters less than 800 nm at 30-60° C. for at least 8 hours. The present disclosure further relates to a symmetric supercapacitor device comprising MnO2 coated electrodes and a solid state ionic liquid as electrolyte, as well as an interdigital transparent SC (IT-SC) device comprising aqueous MnO2 ink.
Original languageEnglish
Patent numberUS10395851
IPC H01G11/46
Priority date20/04/16
Filing date3/03/17
Publication statusPublished - 27 Aug 2019

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