Fig. 6From: Free-Standing Selenium Impregnated Carbonized Leaf Cathodes for High-Performance Sodium-Selenium Batteriesa Nyquist plots of Na-Se batteries assembled with the R800, R800A, and Se-R800A as cathodes for impedance analysis and the inset is the equivalent circuit. b Magnified the section of the Se-R800A. c Voltage profiles and d the Na+ diffusion coefficients of the R800, R800A, and Se-R800A obtained via the GITT technique during discharge/charge processesBack to article page