Experts have successfully developed graphene-based supercapacitors that can be manufactured on a large scale

The reporter learned from the Hefei Institute of Material Sciences, Academy of Sciences, that Chinese experts have successfully developed a flexible all-solid-state supercapacitor, which has high performance heteroatom doped graphene-based nanostructures. It is the first time that the supercapacitor can be manufactured on a large scale.

Excavator arm removal solution Wang Qi said that the research results put forward a new strategy of in-situ integration and assembly of two-dimensional nanostructure units to construct three-dimensional porous hybrid nanostructures or skeleton materials, and have the prospect of large-scale preparation, paving the way for rational design of high-performance hybrid electrode materials and development of flexible power sources or energy storage devices in the future. Road.

In the electrochemical performance test of potassium hydroxide solution as electrolyte, the three-dimensional graphene composites obtained from the above nanostructures exhibit much higher electrical activity than graphene composites and other electroactive materials, and the flexible all-solid-state supercapacitor devices developed on this basis show excellent electrochemical energy storage performance. Cyclicity and stability are particularly prominent.

Wang Qi said that the research results put forward a new strategy of in-situ integration and assembly of two-dimensional nanostructure units to construct three-dimensional porous hybrid nanostructures or skeleton materials, and have the prospect of large-scale preparation, paving the way for rational design of high-performance hybrid electrode materials and development of flexible power sources or energy storage devices in the future. Road.

In the course of their research, the two research groups skillfully integrated the important physical and chemical processes of carbonization, doping, phase conversion and self-assembly of organic molecules. For the first time, the in-situ synthesis and assembly of sulfur-doped graphene and stannous sulfide hybrid nanosheets were successfully realized, and novel three-dimensional nanostructures were obtained for extension and self-assembly. Expanding the application of doped graphene materials in clean energy, optoelectronics and sensing has laid a foundation.

With the rapid growth of demand for flexible wearable electronic products, it is urgent to develop flexible energy storage devices. The key is to design and develop electrode materials with excellent energy storage and mechanical properties.

The project was completed by Dr. Wang Qi, Institute of Plasma Physics, Hefei Institute of Material Sciences, Chinese Academy of Sciences, and Professor Han Min, Nanjing Normal University. Some of the research results have been published online in Small, a well-known international journal of materials science.

Wang Qi introduced that two kinds of nanomaterials have brought new opportunities for the design of high performance electrode materials. They are heteroatom doped graphene and two-dimensional metal sulfide nanostructures. They have great application prospects. But how to effectively “marry” these two kinds of materials to produce high performance electrode materials? It is still a challenging subject in the field of materials science and chemistry.

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