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通过水热条件下合成氧化镍前驱物基础上同步还原氧化石墨烯,随后在空气中退火后制备了氧化镍复合还原氧化石墨烯电极材料。电化学性能测试表明,复合体系中,还原氧化石墨烯为体系中电子传导提供了良好的导电网络,因此,在电流密度0.5A/g下,其比电容值达到了360F/g高于单一氧化镍电极材料的310F/g;同时,在对复合材料的循环寿命特性的测试结果表明,由于还原氧化石墨烯提供了氧化镍电化学过程中所需的体积弛豫空间,复合电极材料的循环寿命也得到了明显的改善。由此可见,通过采用上述简单有效的制备方案可以获得性能更为优异的超级电容器电极材料,为相关电极材料的制备提供了必要的实验基础。
The graphene oxide reduced by graphene oxide was synthesized on the basis of the synthesis of NiO precursors under hydrothermal conditions and then annealed in air to prepare the graphene oxide reduction material. Electrochemical tests show that the reduction graphene oxide provides a good conductive network for the electron conduction in the system. Therefore, the specific capacitance of the graphene oxide reaches 360F / g at a current density of 0.5 A / g, which is higher than that of the single oxidation At the same time, the test results on the cycle life characteristics of the composites show that since the reduction of graphene provides the volumetric relaxation space required for the electrochemical oxidation of nickel oxide, the cycle life of the composite electrode material Has also been significantly improved. Thus, it can be seen that the ultracapacitor electrode material with more excellent performance can be obtained by adopting the simple and effective preparation scheme as described above, which provides the necessary experimental basis for the preparation of the related electrode materials.