Impact of Degree of Graphitization, Surface Properties and Particle Size Distribution on Electrochemical Performance of Carbon Anodes for Potassium‐Ion Batteries
نویسندگان
چکیده
Carbons are considered as anode active materials in potassium-ion batteries (PIBs). Here, the correlation between material properties of disordered (non-graphitic) and ordered graphitic carbons their electrochemical performance carbon||K metal cells is evaluated. First, obtained from heat treatment petroleum coke at temperatures 800 to 2800 °C analyzed regarding microstructure surface properties. Electrochemical metrics for K+ ion storage like specific capacity Coulombic efficiency (CEff) correlated with area, non-basal planes properties, compared Li+ storage. For carbons, can be clearly defect area. highly degree graphitization strongly determines capacity. The initial CEff shows a strong basal planes. Second, kinetic limitations re-evaluated by analyzing commercial graphites particle size A clear size, area well-known challenges terms low-rate capability voltage hysteresis observed. This work emphasizes importance bulk gives important insights future design promising carbon anodes PIB cells.
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ژورنال
عنوان ژورنال: Batteries & supercaps
سال: 2022
ISSN: ['2566-6223']
DOI: https://doi.org/10.1002/batt.202200045