The development of clean and renewable energy is a major strategy for our country’s social and economic development. In all levels of new energy technology, electrochemical energy storage has an extremely important position, and it is also a hot issue in current scientific research. As a new type of two-dimensional structure conductive material, the application of graphene has important significance and great development potential in this field.
Graphene is also one of the most concerned new materials. Its structure is composed of two symmetrical, nested sub-lattices. Doping with heterogeneous atoms is an important method to break the symmetric structure and modulate its physical properties. Nitrogen atoms have a size close to that of carbon atoms and are relatively easy to be doped into the lattice of graphene. Therefore, nitrogen doping plays an important role in the research of graphene materials. Substitution with doping can be used to change the electronic properties of graphene during the growth process.
Graphene doped with nitrogen can open the energy band gap and adjust the conductivity type, change the electronic structure, and increase the free carrier density, thereby improving the conductivity and stability of graphene. In addition, the introduction of nitrogen-containing atomic structures into the carbon grid of graphene can increase the active sites adsorbed on the graphene surface, thereby enhancing the interaction between metal particles and graphene. Therefore, the application of nitrogen-doped graphene for energy storage devices has more superior electrochemical performance, and is expected to be a high-performance electrode material. Existing research also shows that nitrogen-doped graphene can significantly improve the capacity characteristics, rapid charge and discharge capabilities and cycle life of energy storage materials, and has huge application potential in the field of energy storage.
Nitrogen-doped graphene is one of the important ways to realize the functionalization of graphene, and it plays a key role in expanding the application fields. N-doped graphene can significantly improve the capacity characteristics, rapid charge and discharge capabilities and cycle life of energy storage materials, and has huge application potential in chemical energy storage systems such as supercapacitors, lithium ion, lithium sulfur and lithium air batteries.
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Keywords: Nitrogen-doped graphene, Graphene doped with nitrogen
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