Journal
JOURNAL OF MATERIALS CHEMISTRY A
Volume 5, Issue 42, Pages 22186-22192Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c7ta06754b
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Funding
- UQ [2015000144, 2016003775]
- Australian Research Council LIEF [LE160100051]
- Australian Government
- University of Queensland
- University of Queensland Research Computing Centre
- Queensland Cyber Infrastructure Foundation (QCIF)
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We demonstrate an approach to prepare nitrogen-rich hard carbon (N-HCS) from biomass as a robust anode material for sodium-ion batteries. A reversible capacity of similar to 520 mA h g(-1) at a current density of 20 mA g(-1) along with an excellent rate performance was obtained. When cycled at a high current density of 1 A g(-1), the N-HCS was stable for over 1000 cycles delivering a capacity of similar to 204 mA h g(-1). Density functional theory (DFT) computations verified that nitrogen doping enhances the interaction of sodium ions with the carbon, leading to a significantly improved storage capacity. This work provides new physical insights into the relationship between sodium-ion storage and nitrogen-containing hard carbon materials.
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