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Fig. 1 | Nanoscale Research Letters

Fig. 1

From: Carbon- and Binder-Free NiCo2O4 Nanoneedle Array Electrode for Sodium-Ion Batteries: Electrochemical Performance and Insight into Sodium Storage Reaction

Fig. 1

SEM micrographs of a the Ni-Co hydroxide nanoneedle array produced from hydrothermal synthesis and b–d the Ni-Co oxide nanoneedle array (NCO-NNA) and e, f Ni-Co oxide powder (NCO-P) obtained upon post-heat treatment. g N2 adsorption-desorption isotherms and corresponding pore size distribution curve (inset). h XRD patterns for NCO-NNA and NCO-P

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