种NiO@石墨烯纤维超级电容器电极材料的制备方法

• Format: Patent
• Language: Chinese
• Published: 11.01.2019
• 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

本发明公开了种NiO@@石墨烯纤维超级电容器电极材料的制备方法，所述制备方法为包括还原氧化石墨烯，获取石墨烯纤维；以及在石墨烯纤维的表面，通过水热法法包覆生长NiO等步骤。制得的NiO@石墨烯纤维超级电容器电极材料的微结构为NiO包覆石墨烯纤维，具有非常大的比表面积，有效的提高了电极的比表面积和空间利用率，提升了电极材料的比电容、倍率性能及电化学稳定性。在超级电容器三电极体系测试中，本发明制得的材料在2 A g的电流密度下表现出134 F g的高比容量，表现出良好的电化学性能。且制备方法具有简单、成本低等优点。 The invention discloses a manufacturing method of a NiO@graphene fibre supercapacitor electrode material. The manufacturing method comprises the following steps of carrying out reduction and oxidation on graphene, and acquiring a graphene fiber; and on a surface of the graphene fiber, through a hydrothermal method, cladding and growing NiO and the like. A microstructure of the manufactured NiO@graphene fibre supercapacitor electrode material is a NiO cladding graphene fiber which possesses a large specific surface area. A specific surface area of an electrode and a space utilization rate are effectively increased, and a specific capacitance, a rate capability and electrochemical stability of the electrode material are increased too. In a super-capacitor t