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Determination Of The Lithium Ion Diffusion Coefficient In Graphite, Ping Yu, Branko Popov, James Ritter, Ralph White
Determination Of The Lithium Ion Diffusion Coefficient In Graphite, Ping Yu, Branko Popov, James Ritter, Ralph White
Dr Ping Yu
A complex impedance model for spherical particles was used to determine the lithium ion diffusion coefficient in graphite as a function of the state of charge (SOC) and temperature. The values obtained range from of 1.12 × 10–10 to 6.51 × 10–11 cm2/s at 25°C for 0 and 30% SOC, respectively, and for 0% SOC, the value at 55°C was 1.35 × 10–10 cm2/s. The conventional potentiostatic intermittent titration technique (PITT) and Warburg impedance approaches were also evaluated, and the advantages and disadvantages of these techniques were exposed