A new approach to improving the performance of MOF-based supercapacitors has been developed by researchers at the Institute of Nano Science and Technology (INST) in Mohali. The laser-based technique allows controlled introduction of defects into the material, increasing its energy storage capabilities. The method could provide significant improvement over traditional methods used to create defects, such as thermal annealing, chemical exposure and ball milling, which lack precision.
How Laser Technology Improves MOF-Based Supercapacitors
In this innovative approach, Prof. Vivek Bagchi and his team from INST used laser irradiation to create defects and porosity in the CuZn-BTC MOF. By carefully adjusting the laser power, they were able to increase the electrode surface area without changing the crystal structure of the Metal Organic Framework (MOF). Details of the research have been published in the journal ACS Materials Letter.
This fine-tuning increases the material’s efficiency, allowing for better ion diffusion and improved energy storage. The pores generated in the 3D MOF structure allow ions to move more efficiently, significantly increasing the device’s energy storage capacity.
Traditional defect-forming methods tend to transform the material or create composite structures, which reduces efficiency. However, this laser method preserves the original crystallinity of the MOF while improving its electrochemical properties. When exposed to laser, some of the bonds in the CuZn-MOF break, creating pores that improve ion diffusion while maintaining the overall structure intact.
Environmental and efficiency benefits
In addition to enhancing energy storage, the laser process is faster, cleaner, and more environmentally friendly than conventional approaches. It eliminates the need for chemical solvents, making the process safer and faster. The results, published in ACS Materials Letter, underscore the potential for applying this method to other MOF materials to improve performance in energy storage technologies.
