Synthesis And Energy Storage Properties Of Porous Carbon And Graphene Cobalt - Nickel Bimetallic

Among the serious global issues facing mankind at present are climate change and environmental pollution. Directly linked to these is the increasing demand to discover economically viable and environmentally friendly energy sources that will undeniably help to create a sustainable future. The energy crisis, environmental pollution, and global warming are serious problems that are of great concern throughout the world. A diverse range of people are driven to find facile, ecofriendly, and cost-effective routes with the aim of resolving these problems. One important aspect of such research is to synthesize a range of functional materials that can be used resolve many of the challenges associated with both current and future strategies. For example, biomass can be converted into carbons for use as alternative energy sources. Carbon materials are considered as ideal candidates for resolving many of the practical issues encountered（e.g., environmental pollution and global warming）. However, carbon materials usually require tedious synthetic methods as well as expensive cost, which are not conducive environmentally and economically sustainable. These drawbacks limit the large-scale production and commercialization of such carbon materials. Therefore, In order to improve the material specific capacitance, also selected the metal and carbon composite materials. Metal sulfides can be generated pseudocapacitance, thereby further improving the properties of supercapacitors. This paper mainly contents the following aspects:1. 3D hierarchical porous carbon materials（PC） were synthesized through in-situ molten salt template method from renewable biomass waste palm shell. Unique structure gives porous carbon excellent capacitive properties, it was used to study the electrode materials for supercapacitor exhibited excellent cycling stability and rate capability.2. The special morphology NiCo₂S₄/RGO-C complex could be synthesized by using PVP as surfactant via a solvent thermal process. The micro-structure was analyzed with coating carbon on the surface of cobalt and cobalt nickel bimetal sulfide growth on the RGO. Combined with electrochemical tests to further explore the supercapacitor property of composite material. The special lamellar self-assembling structure shows excellent performance and good cycling stability.3. The graphene-based cobalt nickel bimetal sulfide composites by using HMT as surface active agent via solvothermal method. Explore the influence of microstructure on the property, we coated NiCo₂S₄ encapsulated in carbon, and the particles were distributed evenly in the RGO layer, which may be effectively activation of the electron transfer efficiency. This unique micro structure can effectively increase the material specific capacitor and charge-discharge cycle stability in high current density.