Flash Joule Heating Machine: Roll-to-roll flash evaporation Joule heating achieves stable attachment and efficient AWE of meter-scale nickel foam catalyst

Similarity of technical principles and applications

High-temperature thermal shock and material modification: Associate Professor Huang Kai and Professor Wu Hui's team used the roll-to-roll flash Joule heating (R2R-FJH) technology to achieve rapid thermal stabilization through the current heating characteristics of the conductive substrate, and efficiently stabilized the electrocatalyst on the meter-level nickel foam. The 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 achieve precise control of the microstructure of the material. 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: R2R-FJH technology achieves efficient preparation of electrodes through rapid heating, optimizes the combination of electrocatalysts and substrates, and significantly improves the electrochemical performance of electrodes. 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.

Complementarity of technical advantages

High efficiency and low cost: R2R-FJH technology can complete the preparation of large-area electrodes in a short time and is highly efficient. FJH technology also greatly shortens the time of material preparation, improves production efficiency and reduces production costs due to its rapid heating and cooling characteristics. The combination of the two can further improve the efficiency and performance of electrode preparation, reduce production costs, and provide technical support for large-scale production of high-performance electrodes.

Environmental friendliness: R2R-FJH technology avoids the high energy consumption and environmental pollution problems in traditional thermochemical methods and is a green electrode manufacturing method. FJH technology does not require the use of solvents or reaction gases during the material synthesis process and has low energy consumption. The combination of the two helps to achieve a greener and more sustainable electrode preparation process, which meets the current requirements of environmental protection and sustainable development.

Combination direction of future research and application

Further optimization of electrode performance: FJH technology can be applied to the subsequent treatment of electrodes prepared by R2R-FJH technology. Through further rapid heat treatment, the catalyst distribution and structure of the electrode can be optimized to improve its electrochemical performance and stability. For example, the FJH technology can achieve more uniform catalyst distribution and stronger catalyst-substrate interaction, and enhance the catalytic activity and long-term stability of the electrode.

Development of new electrode materials: Combine the rapid synthesis capability of FJH technology and the large-scale preparation advantages of R2R-FJH technology to explore and develop new electrode materials. For example, try to use FJH technology to quickly heat treat and optimize the structure of other types of transition metal oxides or composite materials to achieve higher electrochemical performance and better application effects.

Optimization and standardization of process parameters: In-depth study of the synergistic mechanism of FJH technology and R2R-FJH technology in the electrode preparation process, optimize process parameters such as heating temperature, heating time, current density, etc. Establish a standardized process flow to ensure the stability and consistency of electrode performance, and provide reliable technical guarantees for the commercial production and application of electrodes.

Electrospinning Nanofibers Article Source:

https://doi.org/10.1021/acsnano.4c13787