Fig. 2: Morphology and structure evaluation of slurry-coating and dry-processing positive electrodes with Na2C2O4.
From: Integrating dry-processing and pre-sodiation enables high-energy sodium ion batteries
a, b Morphology of ball-milled Na2C2O4. c, d Morphology of Na2C2O4 electrode before and after charge to 4.5 V vs Na/Na+, where the pores and residual Na2C2O4 are highlighted using yellow and red circles. e, f Optical images and g, h height distribution of slurry-coating and dry-processing electrodes adding Na2C2O4. i Contour height of electrodes adding Na2C2O4. Source data are provided as a Source Data file. j–m Sectional structure and schematics of slurry-coating and dry-processing electrodes. Where NCO and SP are Na2C2O4 and Super P. n Uniform dry-mixed powder. o Lab-scale roll to roll production of DP electrodes. p Winded DP electrodes.
