Abstract
Supercapacitors (SCs) have attracted many attentions and already became part of some high-power derived devices such as Tesla’s electric cars because of their higher power density. Among all types of electrical energy storage devices, battery-supercapacitors are the most promising for superior performance characteristics, including short charging time, high power density, safety, easy fabrication procedures, and long operational life. An SC usually consists of two foremost components, namely electrode materials, and electrolyte. The selection of appropriate electrode materials with rational nanostructured designs have resulted in improved electrochemical properties for high performance and has reduced the cost of SCs. In this review, we mainly spotlight the nickel-based selenides nanostructured which applied as high-performance cathode materials for SCs. Different nickel-based selenides materials are highlighted in various categories, such as nickel-cobalt-based bimetallic chalcogenides and nickel-M based selenides. Also, we mentioned material modification for this material type. Finally, the designing strategy and future improvements on nickel-based selenides materials for the application of SCs are also discussed.
Highlights
The rapid advance of the global economy results in the over-exploitation and overconsumption of primary energy, indicating an increasingly severe environmental pollution
The energy issue is an issue that the national society attaches great importance to
Scientists have devoted to the experiments and exploration of the advantages of the Super Capacitor (SC) such as high specific capacity, high power density, fast charging speed, good ultra-low temperature characteristics, long cycle life, and environmental friendliness
Summary
The rapid advance of the global economy results in the over-exploitation and overconsumption of primary energy, indicating an increasingly severe environmental pollution. Kirubasankar et al (2018) obtained NiSe nanoparticle materials with excellent consistency on graphene nanosheets by in-situ hydrothermal method nickel-based selenide could be regarded as promising electrode material in SC. It is very important to understand how to control the nucleation and growth processes of the nanostructure elements during the entire synthesis and assembly process There are problems, such as difficult synthesis methods and complex preparation steps, in the process of exploring nickel selenide as an SC electrode material. With the continuous deepening of research, the direction has turned to explore the simple preparation method and excellent electrochemical performance of nickel selenide as an SC electrode material, which sheds some light on the development of high-performance hybrid SCs. Due to many nickel-based selenides structures and types, optimization methods for increasing the energy density of the SC have received extensive attention in recent years.
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