Nitrogen-doped graphene carbon composite material and preparation method thereof

• Main Authors: HOU YUAN, LI WANFEI, QIU YONGCAI, ZHANG YUEGANG, ZHOU LISHA, LI GUIZHU, LIU MEINAN
• Format: Patent
• Language: English
• Published: 25.03.2015
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

The invention discloses a nitrogen-doped graphene carbon composite material and a preparation method thereof. The composite material comprises nitrogen-doped graphene and a nitrogen-doped carbon material covering the periphery of the nitrogen-doped graphene. The preparation method comprises the following steps: dissolving carbohydrate into graphene oxide dispersion liquid to ensure that carbohydrate uniformly covers the graphene oxide to form a graphene oxide/carbohydrate complex; coating the surface of the graphene oxide/carbohydrate complex by a polymer to form a graphene oxide/carbohydrate/polymer complex; nitriding the graphene oxide/carbohydrate/polymer complex in a high-temperature environment at the temperature of more than 700 DEG C to form the nitrogen-doped graphene carbon composite material. The composite material is high in specific surface area, less in aggregates, high in dispersibility and high in conductivity; the preparation is simple and feasible in process, low in energy consumption, high in yield and suitable for scale industrial production; moreover, freeze drying operation is eliminated.