Na<inf>2</inf>Ti<inf>3</inf>O<inf>7</inf>@N-Doped Carbon Hollow Spheres for Sodium-Ion Batteries with Excellent Rate Performance
- Publication Type:
- Journal Article
- Advanced Materials, 2017, 29 (24)
- Issue Date:
© 2017 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim Uniform Na2Ti3O7 hollow spheres assembled from N-doped carbon-coated ultrathin nanosheets are synthesized. A unique multilayer structure of nanosheets is presumed to significantly reduce energy consumption during the diffusion process of sodium ions, while the carbon-coated structure can increase the overall conductivity. The as-prepared sample used as an anode in sodium-ion batteries exhibits the best rate performance ever reported for Na2Ti3O7, delivering more than 60 mAh g−1 after 1000 continuous cycles at the high rate of 50 C, which was achieved due to its unique structure.
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