SEMINAR

Conversion-based cathodes, particularly those utilizing halogen materials such as iodine (I), bromine (Br), and chlorine (Cl), have shown significant promise for high-energy and high-power energy storage applications. This presentation will explore recent advancements in the development of these cathodes, highlighting innovative approaches to enhance their electrochemical performance and stability through multi-electron transfer mechanisms.
Key developments include the use of atomically dispersed Fe-N5 sites in mesoporous carbon frameworks (FeSAC-CMK) for Zn||Br2 batteries, which significantly improve bromine redox kinetics and utilization efficiency. This approach has led to impressive specific capacities and superior rate capabilities, with high energy and power densities and excellent cycling performance. Additionally, the integration of low-dimensional halide hybrid perovskite cathodes, such as TmdpPb2[IBr]6, has enabled reversible three-electron conversions, resulting in high capacities and remarkable cycling stability. The use of interhalogen compounds, like iodine trichloride (ICl3), has further advanced the field by addressing challenges related to redox-active and reversible chlorine cathodes in organic electrolyte-based lithium-ion batteries.
These advancements demonstrate the potential of halogen conversion-type batteries to achieve high energy densities and long cycle lives through multi-electron transfer processes, making them viable candidates for next-generation energy storage systems. The presentation will discuss the underlying mechanisms, experimental characterizations, and theoretical insights that support these findings, offering a comprehensive overview of the state-of-the-art in halogen-based conversion cathodes.