Low-surface-area nitrogen doped carbon nanomaterials for advanced sodium ion batteriesElectronic supplementary information (ESI) available: Experimental details; XPS data; kinetic analysis of CV. See DOI: 10.1039/c7cc09911h

A low-surface-area nitrogen-doped carbon nanomaterial was prepared via a facile annealing method, which shows good Na-ion storage ability (334 mA g −1 ) and coulombic efficiency due to its mixed charge-discharge mechanism and unique structural features. A low-surface-area nitrogen-doped carbon nanomaterial was prepared via a facile annealing method, which shows good Na-ion storage ability (334 mA g −1 ) and coulombic efficiency due to its mixed charge-discharge mechanism and unique structural features.