Journal
CHEMISTRY-A EUROPEAN JOURNAL
Volume 23, Issue 63, Pages 16051-16058Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/chem.201703375
Keywords
anode; co-doping; heteroatom; porosity; sodium ion battery
Categories
Funding
- National Natural Science Foundation of China [21501049, 21503071]
- Fund of Key Scientific and Technological Project of Henan Province [172102210353, 172102210049]
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Carbonaceous materials are one of the most promising anode materials for sodium-ion batteries, because of their abundance, stability, and safe usage. However, the practical application of carbon materials is hindered by poor specific capacity and low initial Coulombic efficiency. The design of porous structure and doping with heteroatoms are two simple and effective methods to promote the sodium storage performance. Herein, the N, P co-doped porous carbon materials are fabricated using renewable and biodegradable gelatin as carbon and nitrogen resource, phosphoric acid as phosphorus precursor and polystyrene nanospheres as a template. The product can deliver a reversible capacity of 230 mA hg(-1) at a current density of 0.2 Ag-1, and even a high capacity of 113 mA hg(-1) at 10 Ag-1. The enhanced sodium storage performance is attributed to the synergistic effect of the porosity and the dual-doping of nitrogen and phosphorus.
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