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High-temperature thermal shock and material modification: Professor Yang Chuncheng and Professor Jiang Qing's team prepared bismuth nanoparticles embedded in carbon nanorods (Bi/CNRs-15) for use as negative electrode materials for sodium-ion batteries through high-temperature thermal shock (HTS) technology. This technology achieves high dispersibility, high active sites and a stable solid electrolyte interface (SEI) layer through rapid heating and cooling, significantly improving the low-temperature electrochemical performance of the material. Flash Joule Heating Machine (FJH) technology can also quickly heat the material to a high temperature, triggering the reorganization of the internal structure of the material and the formation of defects, and achieving precise control of the material's microstructure. Both use the violent reaction conditions brought about by high-temperature thermal shock to promote efficient modification of the target material.
Rapid heating and performance optimization: HTS technology achieves efficient preparation of Bi/CNRs-15 through rapid heating, optimizes its structure and performance, and significantly improves the storage and fast charging performance of sodium ions at extremely low temperatures. FJH technology is also commonly used for rapid heating and performance optimization in the preparation of other materials. For example, in the preparation of carbon-based materials such as graphene, the defect density and electronic structure of the material can be regulated by rapid heating, thereby optimizing its conductivity and chemical activity.
High efficiency and low cost: HTS technology can complete the preparation of Bi/CNRs-15 in a very short time, with high efficiency. FJH technology also greatly shortens the time for material preparation, improves production efficiency and reduces production costs with its characteristics of rapid heating and cooling. The combination of the two can further improve the efficiency and performance of material preparation, reduce production costs, and provide technical support for the large-scale production of high-performance materials.
Environmental friendliness: HTS technology avoids the long-term energy consumption and environmental pollution problems in traditional high-temperature treatment. FJH technology does not require the use of solvents or reaction gases during material synthesis, and has low energy consumption, which meets the current requirements of environmental protection and sustainable development.
Further optimization of material properties: FJH technology can be applied to the subsequent treatment of Bi/CNRs-15 treated by HTS technology. Through further rapid heat treatment, the crystal structure and defect distribution of the material can be optimized to improve its mechanical strength and piezoelectric properties. For example, more uniform defect distribution and stronger metal-support interaction can be achieved through FJH technology, which can enhance the material's anti-sintering ability and long-term stability.
Development of new materials: Combine the rapid synthesis capability of FJH technology and the structural regulation advantages of HTS technology to explore and develop new types of negative electrode materials for sodium ion batteries. For example, try to use FJH technology to perform rapid heat treatment and structural optimization on other types of metal or non-metal materials, and then use HTS technology to synthesize them to achieve higher performance and better application effects.
Optimization and standardization of process parameters: In-depth study of the synergistic mechanism of FJH technology and HTS technology in the material preparation process, and optimize process parameters such as heating temperature, heating time, current density, etc. Establish a standardized process flow to ensure the stability and consistency of material performance, and provide reliable technical support for the commercial production and application of negative electrode materials for sodium ion batteries.
Preparation of ceramics with complex shapes: Associate Professor Yang Zhengbao's team at the Hong Kong University of Science and Technology successfully prepared ceramics with a variety of complex geometric shapes, including twisted shapes, arched shapes, and structures with micropatterns through USS technology. These ceramic materials show good mechanical strength, piezoelectric properties and geometric stability, providing technical support for practical applications.
Rapid liquid-phase assisted ultra-high temperature sintering: ScienceNet reported a rapid liquid-phase assisted ultra-high temperature sintering method that can achieve effective densification without completely melting the material and maintain the uniformity of the high entropy structure. By rapidly heating to a temperature of 3000 K, a eutectic liquid phase is formed between high entropy metal diborides and boron carbides, which helps to quickly fill the pores between grains and form a low-melting dodecaboride phase. This method is not only suitable for densifying composite materials, but can also be used to prepare thin films and coatings, showing a wide range of application potential.
Technology Promotion and Large-Scale Production: HTS technology significantly reduces the preparation cost and energy consumption of Bi/CNRs-15, providing a practical path for large-scale production of high-performance sodium-ion battery negative electrode materials. In the future, it is expected to be industrialized in the fields of electronics, energy, and biomedicine.
Expanding the Material System: The HTS process provides a reference for the preparation of a variety of high-performance materials, such as high-entropy nitrides, borides, and multi-component composite materials. These new materials can further meet the needs of different industrial fields.
In-depth research and process optimization: Subsequent research can focus on the in-depth analysis of the reaction mechanism and microstructure evolution during the HTS process, while optimizing equipment and process parameters to improve the consistency and stability of material performance, laying the foundation for further promoting the application of high-performance materials
Electrospinning Nanofibers Article Source:
https://doi.org/10.1007/s40820-024-01560-9
