GITT量測設置範例
Reference :https://onlinelibrary.wiley.com/action/downloadSupplement?doi=10.1002%2Fadma.201705580&file=adma201705580-sup-0001-S1.pdf A cell was charged or discharged at 30 mA g-1 rate for 20 min, followed by a 3 h open circuit step to allow relaxation back to equilibrium (defined as dE/dt < 0.2 mV h-1). The procedure was continued until the charge (or discharge) voltage reached 1.8 V (0.2 V). The Zn2+ ion diffusion coefficients could be calculated using the following equation first outlined by Weppner and Huggins: where, I is the current (A); Vm is the molar volume of the ZVO (cm3 mol-1); ZA is the charge number; F is the Faraday’s constant (96485 C mol-1); S is the electrode/electrolyte contact area (cm2); dE/dδ is the slope of the coulometric titration curve, found by plotting the steady state voltages E (V) measured after each titration step δ; dE/d√t is the slope of the linearized plot of the potential E (...