Journal
MATERIALS LETTERS
Volume 183, Issue -, Pages 346-350Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.matlet.2016.07.128
Keywords
Sodium ion batteries; Cathodes; Composite materials; Electrochemical performance; Energy storage and conversion
Funding
- National Natural Science Foundation of China [51202297, 51472271, 61376018, 51174233]
- Program for New Century Excellent Talents in University [NCET-12-0554]
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Na0.33V2O5 nanosheet@graphene composites were explored as cathodes for sodium ion batteries for the first time. Here, Na0.33V2O5 nanosheet@graphene composites with special sandwich-like nanostructures were synthesized. The composites exhibit high discharge capacity (of ca. 213 mA h g(-1) at 20 mA g(-1)), good cycling stability (with a capacity retention of 83.3% at 50 mA g(-1) after 100 cycles) and desirable rate performance (88.2 mA h g(-1) at an extremely high current density of 6000 mA g(-1)) as cathodes for sodium storage. Notably, the as-synthesized Na0.33V2O5 nanosheet@graphene composites show much higher specific capacity and better rate capability than those reported Na0.33V2O5 materials which were usually tested at relatively low currents (no more than 200 mA g(-1)) and showed low capacities (less than 150 mA h g(-1)). (C) 2016 Elsevier B.V. All rights reserved.
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