The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 14, 2022
Filed:
Dec. 29, 2018
Jiangsu University, Jiangsu, CN;
Changzhou University, Jiangsu, CN;
Jiangsu University, Jiangsu, CN;
Abstract
Disclosed are an ultra-low temperature and high-capacity supercapacitor and a preparation method thereof. The electrode material used in the ultra-low temperature and high capacity supercapacitor is a composite porous carbon material comprising micropores and mesopores, the specific surface area of the electrode material is greater than 2500 m/g, the pore size of micropores is larger than 0.8 nm, the pore size of mesopores is 2-3.0 nm, and the proportion of micropores is greater than 70%. The electrolyte of the supercapacitor is a solution of spirocyclic quaternary ammonium tetrafluoroborate in a mixed solvent of 1,3-dioxolane (or methyl formate, or a mixture of both)/acetonitrile. Based on the above electrode materials and combined with the above electrolyte, the supercapacitors as prepared can have a mass specific capacitance of greater than 150 F/g and a volume specific capacitance of greater than 80 F/cm, under a temperature of −100° C. and at a current density of greater than 1 A/g.