[Chinese instrument network instrument research and development] Recently, Chinese Academy of Sciences, Institute of Plasma Physics, Hefei Institute of Materials Ph.D. Wang Qi and Professor Han Min Group of Nanjing Normal University cooperation, in the high-performance heteroatom doping of graphene-based nanostructures of scale Preparation and new progress in the application of flexible all-solid supercapacitors.
Preparation and Characterization of 3D-doped Graphene-based Hybrid Nanomaterials Some research results have been published online in the international journal Small, and was selected as the magazine's Inside Front Cover.
To meet people's increasing demand for flexible wearable electronic products, there is an urgent need to develop flexible all-solid power sources or energy storage devices. The key to achieving this goal is to design and develop electrode materials that combine excellent energy storage and mechanical properties. The emergence of heteroatom-doped graphene and 2D layered metal sulfide (LMCs) nanostructures has brought new opportunities for the design of high-performance electrode materials, but its energy storage properties (energy density, cycle stability, etc.) Need to be further improved. Whether or not these two types of materials can be effectively "coupled" or coupled to develop high-performance electrode materials is still a challenging subject in the fields of materials science and chemistry.
In response to the above problems, Wang Qi and Han Min’s research group conducted a cooperative study using the strategy of controllable thermal conversion of oleyl-coated precursors of SnS2-SnS mixed-phase nanodisks to subtly coordinate the carbonization, doping, and phase inversion of organic molecules. Self-assembly and other important physical and chemical processes are integrated into one body. For the first time, in-situ synthesis and assembly of sulfur-doped graphene (SG) and SnS hybrid nanosheets have been successfully achieved, and novel 3D porous SnS/SG hybrid nanostructures have been obtained. . Compared with the traditional synthesis strategy, this method has the advantages of simple and high efficiency, good reproducibility, and large-scale preparation. It lays a foundation for extending and extending the application of doped graphene materials in important energy technologies such as clean energy, photoelectricity and sensing. . The KOH solution was used as the electrolyte in the three-electrode system. The resulting 3D graphene composite had a mass specific capacitance as high as 642 F g-1 (current density of 1 A g-1), which was much higher than the recently reported graphene composites and others. Electroactive materials (eg, bulk and nanoscale SnS and its complexes, G-Mn3O4 nanorods, G-CoS2, 2D CoS1.07/N-C nanohybrids, etc.).
Construction and Performance Test of 3D Doped Graphene-based Flexible All Solid Supercapacitors Subsequently, ASSSCs, a flexible all-solid-state supercapacitor device, was further developed to exhibit excellent electrochemical energy storage performance: area specific capacitance as high as 2.98 mF cm-2, excellent long-term cycling stability (99% for 10000 cycles), excellent Flexibility and mechanical stability (can be repeatedly folded or bent more than 1000 times without change in performance) are superior to reported graphene, 2D SnSe2 and SnSe, and 3D GeSe2 nanostructured flexible ASSSCs.
This work proposes a new strategy for in-situ integration and assembly of 2D nanostructured cells to construct 3D porous hybrid nanoarchitectures or framework materials, and has the prospect of large-scale preparation, and rationally design high-performance hybrid electrode materials for the future development. Flexible power sources or energy storage devices paved the way. In addition, through the optimization of design and combination, it is also expected to extend other types of multifunctional 3D porous skeleton materials, and follow-up work is under way.
The above work was funded by the National Natural Science Foundation of China and the Special Support Fund for the President of the Hefei Research Institute of the Chinese Academy of Sciences.
(Original title: Sulfur-doped graphene-based flexible all-solid supercapacitors developed by Hefei Research Institute)
Preparation and Characterization of 3D-doped Graphene-based Hybrid Nanomaterials
To meet people's increasing demand for flexible wearable electronic products, there is an urgent need to develop flexible all-solid power sources or energy storage devices. The key to achieving this goal is to design and develop electrode materials that combine excellent energy storage and mechanical properties. The emergence of heteroatom-doped graphene and 2D layered metal sulfide (LMCs) nanostructures has brought new opportunities for the design of high-performance electrode materials, but its energy storage properties (energy density, cycle stability, etc.) Need to be further improved. Whether or not these two types of materials can be effectively "coupled" or coupled to develop high-performance electrode materials is still a challenging subject in the fields of materials science and chemistry.
In response to the above problems, Wang Qi and Han Min’s research group conducted a cooperative study using the strategy of controllable thermal conversion of oleyl-coated precursors of SnS2-SnS mixed-phase nanodisks to subtly coordinate the carbonization, doping, and phase inversion of organic molecules. Self-assembly and other important physical and chemical processes are integrated into one body. For the first time, in-situ synthesis and assembly of sulfur-doped graphene (SG) and SnS hybrid nanosheets have been successfully achieved, and novel 3D porous SnS/SG hybrid nanostructures have been obtained. . Compared with the traditional synthesis strategy, this method has the advantages of simple and high efficiency, good reproducibility, and large-scale preparation. It lays a foundation for extending and extending the application of doped graphene materials in important energy technologies such as clean energy, photoelectricity and sensing. . The KOH solution was used as the electrolyte in the three-electrode system. The resulting 3D graphene composite had a mass specific capacitance as high as 642 F g-1 (current density of 1 A g-1), which was much higher than the recently reported graphene composites and others. Electroactive materials (eg, bulk and nanoscale SnS and its complexes, G-Mn3O4 nanorods, G-CoS2, 2D CoS1.07/N-C nanohybrids, etc.).
Construction and Performance Test of 3D Doped Graphene-based Flexible All Solid Supercapacitors
This work proposes a new strategy for in-situ integration and assembly of 2D nanostructured cells to construct 3D porous hybrid nanoarchitectures or framework materials, and has the prospect of large-scale preparation, and rationally design high-performance hybrid electrode materials for the future development. Flexible power sources or energy storage devices paved the way. In addition, through the optimization of design and combination, it is also expected to extend other types of multifunctional 3D porous skeleton materials, and follow-up work is under way.
The above work was funded by the National Natural Science Foundation of China and the Special Support Fund for the President of the Hefei Research Institute of the Chinese Academy of Sciences.
(Original title: Sulfur-doped graphene-based flexible all-solid supercapacitors developed by Hefei Research Institute)