Patent ID: 9458330
Filing Date: 2016-10-04
CPC Classification: A01N,B05D,C08K,C09D

Claim Text:
1. A method of preparing carbon-coated manganous oxide, the method comprising: (1) preparing a liquid polyacrylonitrile (LPAN) solution as a carbon source, stiffing the LPAN solution at a temperature of between 100 and 200° C. for between 100 and 200 hrs to yield a cyclized polyacrylonitrile solution; (2) heating the cyclized LPAN solution at between 200 and 300° C. for between 1 and 10 hrs to yield a thermally-oxidized polyacrylonitrile (OPAN) comprising a ladder structure; (3) mixing the thermally-oxidized polyacrylonitrile with a manganese compound with a mass ratio thereof being between 0.1:1 and 0.9:1, to yield a mixture, and adding a solvent to the mixture and uniformly mixing, to yield a polyacrylonitrile coated manganese compound; (4) drying the polyacrylonitrile coated manganese compound in an oven at a temperature of between 200 and 250° C. for between 1 and 10 hrs until the solvent is evaporated completely and the polyacrylonitrile coated on the manganese compound is crosslinked to form a solid, to yield a carbonized precursor coated manganese compound; and (5) calcining the carbonized precursor coated manganese compound in the presence of an inert gas flow of between 10 and 500 mL/min for between 1 and 10 hrs at a temperature of between 500 and 900° C., to yield a carbon-coated manganous oxide.