Supercapacitor electrode materials based on plant fiber base and preparation method thereof

• Main Authors: Mao Tianyan, Cheng Laifei, Zhang Yani, Wu Heng
• Format: Patent
• Language: Chinese; English
• Published: 10.08.2016
• 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; REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGYGENERATION, TRANSMISSION OR DISTRIBUTION; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE

The present invention relates to a supercapacitor electrode materials based on a plant fiber base and a preparation method thereof. Carbonized plant fibers, namely carbon fibers are taken as a substrate, CNTs with high conductivity, high specific surface area and different capacities are generated at the surface in-site of monofilament carbon fibers through adoption of a CVD method, and nanocrystalline metal oxides with different morphologies are directly prepared at the surface of the CNTs through adoption of a hydrothermal method, so that the electrode materials with the nanometer multistage composite structure are realized and are able to reduce the resistance of electrodes and provide a rapid diffusion path for ions in the electrolyte to allow the electrode material to display the excellent electrochemical performance. 本发明涉及种基于植物纤维的纳米多级结构纳米电极材料及其制备方法，由碳化的植物纤维即碳纤维为基底，CVD法实现在单丝碳纤维表面原位生长高导电、高比表面积、不同负载量的CNTs，水热法在CNTs表面直接制备不同形貌的纳米金属氧化物，从而实现其具有纳米多级复合结构的电极材料，这种植物纤维基纳米多级结构电极材料可以降低电极的内阻，并为电解液中离子提供快速扩散通道，使得电极材料显示出优