Manganese dioxide-coated hollow carbon spheres and preparation method and application thereof

• Main Authors: ZHAO LINGZHI, CAI YUEPENG, XIE JIQING
• Format: Patent
• Language: Chinese; English
• Published: 15.02.2017
• Subjects: BASIC ELECTRIC ELEMENTS; CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES ORLIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE; ELECTRICITY; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; NANOTECHNOLOGY; PERFORMING OPERATIONS; REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGYGENERATION, TRANSMISSION OR DISTRIBUTION; SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE; TRANSPORTING

The invention belongs to the technical field of new energy, and specifically relates to a preparation method and an application of manganese dioxide-coated hollow carbon spheres. The preparation method comprises the steps of taking silicon dioxide as a template to synthesize phenolic resin; performing high-temperature calcining in inert atmosphere to convert the phenolic resin on the surface of the silicon dioxide into a carbon material; next, immersing the carbon material into an acidic or alkali solution to remove the silicon dioxide to obtain hollow carbon spheres; and finally coating the surface of carbon with a layer of manganese dioxide through a redox reaction between carbon and potassium permanganate. The preparation method is simple in operation; and the synthesized material is regular and tidy in appearance, uniform in size, and relatively large in specific surface area, so that ionic transport is facilitated; and in addition, the manganese dioxide-coated hollow carbon spheres can be applicable to a