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High Temperature Thermal Shock and Material Modification: Prof. Lei Zhao and Dr. Gang Chen's team used Rapid Joule Heating (RJH) technology to rapidly synthesize oxide nanoparticles (e.g., Co₃O₄) on the surface of pre-treated carbon cloth (PACC) by instantaneous high temperature thermal shock (HTS), which achieves the activation of the carbon cloth and uniform growth of the oxide particles. The Flash Joule Heating Machine (FJH) technique also rapidly heats the material to high temperatures, triggering the reorganization of the internal structure of the material and the formation of defects, allowing precise control of the microstructure of the material. Both utilize the intense reaction conditions brought about by high-temperature thermal shock to promote efficient modification of the target material.
Rapid heating and performance optimization: RJH technology achieves efficient synthesis of oxide nanoparticles through rapid heating, optimizes their structure and distribution, and significantly improves the electrochemical performance of supercapacitors.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 through rapid heating, thus optimizing its electrical conductivity and chemical structure. thereby optimizing its conductivity and chemical activity.
High efficiency and low cost: RJH technology is highly efficient as it can synthesize oxide nanoparticles in a very short period of time (only 10 seconds), while FJH technology, with its rapid heating and cooling, can dramatically shorten the material preparation time, improve the production efficiency and reduce the production cost. The combination of the two can further enhance the efficiency and performance of material preparation, reduce production costs, and provide technical support for the large-scale production of high-performance supercapacitor electrode materials.
Environmental friendliness: RJH technology avoids the complex process and environmental pollution problems in traditional wet chemistry and gas annealing etc. FJH technology does not need to use solvents or reaction gases during material synthesis and has low energy consumption, which is in line with the current requirements of environmental protection and sustainable development.
Further optimization of material properties: FJH technology can be applied to the subsequent treatment of oxide nanoparticles treated by RJH technology to optimize the crystal structure and defect distribution of the particles and improve their electrochemical properties and stability through further rapid heat treatment. For example, more uniform defect distribution and stronger metal-carrier interactions are realized by FJH technology to enhance the sintering resistance and long-term stability of the particles.
Development of new electrode materials: Combining the rapid synthesis capability of FJH technology and the structure regulation advantage of RJH technology, explore the development of new types of supercapacitor electrode materials. For example, try to put other types of metal oxides or composite materials through the FJH technology for rapid heat treatment and structure optimization, and then synthesize them using the RJH technology to achieve higher performance and more excellent application effects.
Optimization and standardization of process parameters: In-depth study of the synergistic mechanism between FJH technology and RJH technology in the process of material preparation, and optimization of process parameters, such as heating temperature, heating time, current density, and so on. Establish a standardized process flow to ensure the stability and consistency of the material performance, and provide a reliable technical guarantee for the commercial production and application of supercapacitor electrode materials.
Electrospinning Nanofibers Article Source:
https://doi.org/10.1016/j.jpowsour.2024.235963
