Patent ID: 9741998
Date: 2017-08-22
CPC Classifications: H01G,H01M,Y02E

Claim:
1. A method for manufacturing an energy-storage composite material comprising: (a) providing a solution having a carbon substrate, wherein the solution having the carbon substrate comprises graphene sheets, metal compounds, sodium hydroxide and alcohol, and placing the solution in a pressure container, and a surface of the carbon substrate having an energy-storage active precursor; (b) stirring the solution having the carbon substrate at a first stirring speed between 10 rpm and 2000 rpm, and venting air from the pressure container at a first temperature less than a boiling point of the solution having the carbon substrate, such that a pressure in the pressure container reaches a first pressure larger than a saturated vapor pressure of the solution having the carbon substrate and is maintained for a first period of time between 1 second and 30 minutes; and (c) introducing carbon dioxide into the pressure container, stirring the solution having the carbon substrate at a second stirring speed between 20 rpm and 2000 rpm, increasing a pressure and a temperature in the pressure container to a second pressure between 7 MPa and 30 MPa and a second temperature between 40° C. and 200° C. and maintaining for a second period of time between 30 minutes and 4 hours, and then reducing the pressure to the atmosphere pressure to obtain an energy-storage composite material.