Journal
CHEM
Volume 3, Issue 1, Pages 152-163Publisher
CELL PRESS
DOI: 10.1016/j.chempr.2017.05.021
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Funding
- Hong Kong Polytechnic University [1-ZVGH, 1-YW1A]
- National Science Foundation [ECCS-1610806]
- Robert A. Welch Foundation [F-1066]
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The greater availability of sodium (Na) over lithium (Li) motivates development of a Na-ion battery that can compete with a Li-ion battery. In these batteries, both electrodes consist of hosts intowhich Li+ or Na+ can be inserted reversibly. Graphite has been the anode host for Li-ion batteries, but the Na+ ion is too large to be inserted easily between the flat graphene layers of common graphite. We report the synthesis and electrochemical performance of N-doped carbon nanofibers and tubules with an organic-liquid electrolyte and a large fraction of graphitic carbon and larger spacing (0.38-0.44 nm) between carbon sheets; the carbon hollow tubules yield ultrastable (10,000 cycles), high-rate capabilities of Na+ intercalation and deintercalation with reversible capacities up to 346 mAh g(-1).
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