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Majid Shaker,Ali Asghar Sadeghi Ghazvini,Reza Riahifar,Asim Mumtaz 대한금속·재료학회 2022 ELECTRONIC MATERIALS LETTERS Vol.18 No.4
Herein, we present a new model to investigate the cause of the low initial coulombic efficiency of lithium-ion battery (LIB)porous carbon anodes and discover its relationship with the porosity of these materials. According to the proposed model,the capacity of porous carbon LIB anodes is in a direct relationship with their porosity, which reduces by the formation ofthe solid electrolyte interphase (SEI) layer occupying the cavities and decreasing the accessible surface area for the electrolyte. The introduced model in this study was compared with the data published in the literature and revealed a satisfactoryagreement with them. As a result, it was concluded that the fraction of the mesopores occupied by SEI after the 1st cyclefluctuates around the value of 0.5 and is mostly in the range of 0.6−0.4. Thereby, it can be employed for the prediction ofthe first cycle coulombic efficiency (CE) of carbonaceous anodes as LIB anodes and optimization of their structure.