Journal
ADVANCED MATERIALS INTERFACES
Volume 3, Issue 9, Pages -Publisher
WILEY
DOI: 10.1002/admi.201500740
Keywords
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Funding
- National Key Program for Basic Research of China [2015CB251100]
- Program for New Century Excellent Talents in University [NCET-12-0047]
- U.S. Department of Energy under Vehicle Technologies Office, Department of Energy, Office of Energy Efficiency and Renewable Energy (EERE) [DE-AC0206CH11357]
- State Scholarship Fund of the China Scholarship Council [201406035025]
- National Science Foundation [CMMI-1200383]
- Argonne National Laboratory [4F31422]
- Directorate For Engineering
- Div Of Civil, Mechanical, & Manufact Inn [1619743] Funding Source: National Science Foundation
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Na-ion batteries have been regarded as promising alternatives for Li-ion batteries due to the extensive sodium reserves in the world. Na3V2(PO4)(3) has been proved to be a good candidate of the cathode materials in Na-ion batteries but the intrinsic low electrical conductivity and sluggish kinetics handicapped its application. Here, 3D hierarchical Na3V2(PO4)(3) particles are synthesized by a facile hydrothermal method, constructed by carbon-coated 2D Na3V2(PO4)(3) nanowalls. Superior cell performance of high rate capability and cycle stability are observed in the well-defined structure. As the cathode in Na-ion batteries, it delivers a high capacity almost reaching the theoretical one and exhibits high capacity retention. The enhanced rate capability and cycle performance can be attributed to the improved electrical conductivity from the interconnected carbon layer and the shortened ion diffusion length and high specific surface area from the nanowalls.
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