Method for preparing graphene/spherical carbon/metal oxide composite material

• Main Authors: WANG HAIQI, ZHOU RUHAO, CHEN MIAOMIAO, FENG YANING, MAO MENGCHEN, GUO HUA
• Format: Patent
• Language: English
• Published: 11.11.2015
• Subjects: BASIC ELECTRIC ELEMENTS; CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES ORLIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE; ELECTRICITY

The invention discloses a method for preparing a graphene/spherical carbon/metal oxide composite material, and includes the steps of: weighing the following raw materials in mass percent: 8% to 20% of resorcinol solution or hydroquinone solution, 5% to 10% of formaldehyde solution or furfural solution, 65% to 80% of distilled water, 3% to 8% of graphene suspension, and 4% to 10% of catalyzer, and a content sum of the abovementioned components being 100%; mixing the abovementioned raw materials evenly to obtain a reaction initial solution; moving the reaction initial solution into a glass bottle with a sealing cover, covering the glass bottle with the bottle cover and placing the glass bottle in a drying box for gel reaction, thereby obtaining gel; and after wet gel is dried, dropwise adding saline solution till saturation, after drying, then dropwise adding alkaline solution till saturation, and after carbonization, the graphene/spherical carbon/metal oxide composite material is obtained. The prepared graphene/spherical carbon/metal oxide composite material has a high specific area, double-layer capacitance, relatively high specific capacitance and charge and discharge efficiency, improves electrical conductivity of an electrode, and can satisfy a high-power power supply requirement.