Impact of Degree of Graphitization, Surface Properties and Particle Size Distribution on Electrochemical Performance of Carbon Anodes for Potassium‐Ion Batteries

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.