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High-temperature thermal shock and material reaction: Professor Li Jinhui and Dr. Yu Jiadong's team used pulsed DC heating to achieve sulfurization shock, and carried out solid-solid sulfurization reaction at a transient high temperature of about 1000°C to selectively recover lithium and transition metals from waste lithium batteries. Flash Joule Heating Machine (FJH) technology can also quickly heat materials to high temperatures, trigger chemical reactions inside the materials or with external substances, and achieve rapid synthesis and structural transformation of materials. Both use the violent reaction conditions brought about by high-temperature thermal shock to promote efficient recovery or preparation of target materials.
Optimization of energy consumption and efficiency: Sulfurization shock technology achieves efficient recovery of lithium and transition metals through transient high temperatures, significantly reducing energy consumption and carbon emissions. FJH technology, with its characteristics of rapid heating and cooling, greatly shortens the time for material preparation, improves production efficiency, and reduces energy consumption. Both have demonstrated the pursuit of energy consumption optimization in their respective application fields, providing technical support for the realization of green and efficient material processing and preparation.
Environmental friendliness: The sulfurization shock technology avoids the release of a large amount of harmful gases (such as SO₂) in the traditional hot sulfurization process. FJH technology does not require the use of solvents or reaction gases in the material synthesis process and is an environmentally friendly preparation method. The combination of the two helps to achieve a greener and more sustainable waste lithium battery recycling and material preparation process, which meets the current requirements of environmental protection and sustainable development.
Process flexibility and scalability: The sulfurization shock technology can flexibly control the reaction temperature and time by adjusting the size and time of the pulse current to meet different recycling needs. FJH technology also has good process flexibility and can achieve precise control of the material preparation process by changing parameters such as current density and heating time. Both have good scalability and can be applied to waste lithium battery recycling and material preparation of different scales and types.
Further optimization of the recycling process: FJH technology can be applied to other links of waste lithium battery recycling, such as in the material pretreatment stage after battery disassembly, through FJH technology, rapid heating and cooling, to achieve rapid separation and preliminary recovery of battery materials, improve recycling efficiency and material purity.
Development of new recycling materials: Combine the rapid synthesis capability of FJH technology and the material reaction advantages of sulfidation shock technology to explore and develop new recycling materials. For example, try to use FJH technology to quickly heat treat and optimize the structure of other types of sulfides or metal compounds to achieve more efficient lithium and transition metal recovery.
Optimization and standardization of process parameters: In-depth study of the synergistic mechanism of FJH technology and sulfidation shock technology in the recycling process of waste lithium batteries, optimize process parameters such as heating temperature, heating time, current density, etc. Establish a standardized process flow to ensure the stability and consistency of recycling efficiency and material performance, and provide reliable technical support for the large-scale application of waste lithium battery recycling.
Electrospinning Nanofibers Article Source:
https://doi.org/10.1016/j.cej.2025.159206
