Abstract
The electrochemical properties of a CFX cathode were improved by defluorination of the surface with a N2 plasma and using a silica wafer. Compared to the N2 plasma treatment alone, when the CFX and silica were reacted together, the C-F bonds were modified and the surface was etched efficiently, so defluorination was enhanced. An electrochemical analysis confirmed that Half-cells prepared by treating CFx and silica with nitrogen plasma exhibited a capacity of about 400 mAh/g at 5C. In addition, it was confirmed that the loss of charge transfer was reduced by up to 71% compared to that for pristine CFX. As shown by a GITT analysis, when the CFx and silica were treated with N2 plasma together, the ion conductivity gradually increased due to a decrease in the ion diffusion barriers and the formation of a carbon layer. Therefore, this is a simple and effective way to improve the conductivities of CFX cathode materials with the energy of a N2 plasma and the silica-fluorine reaction.
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This work was supported by the Agency for Defense Development (ADD) (No. UD2200061D) by the Korean Government and Chungnam National University (2022~2023).
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Ha, S., Lim, C., Myeong, S. et al. Improvement of the electrochemical properties of Li/CFx primary batteries induced by Nitrogen plasma treatment from silica and carbon fluoride. Carbon Lett. 34, 1521–1528 (2024). https://doi.org/10.1007/s42823-024-00719-z
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DOI: https://doi.org/10.1007/s42823-024-00719-z