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Biomass-derived nitrogen/oxygen co-doped hierarchical porous carbon with a large specific surface area for ultrafast and long-life sodium-ion batteries.
- Source :
-
Applied Surface Science . Dec2018, Vol. 462, p713-719. 7p. - Publication Year :
- 2018
-
Abstract
- Highlights • Large specific surface area porous carbon. • Biomass-derived nitrogen/oxygen co-doped biomass carbon. • Excellent rate capability and cycle stability performance in sodium ion battery. Abstract Biomass derived porous carbons are economic and attractive materials for anode electrodes in sodium-ion batteries. In this work, a novel porous carbon has been prepared through activation of longan shell, which demonstrates an interconnected hierarchical porosity comprised of macro-, meso- and micro-pores as well with a high specific surface area of 2990 m2 g−1. Benefiting from the unique pore structure and oxygen and nitrogen dual doping, a well-developed ionic and electronic conductivity is achieved. Remarkably, it exhibits an excellent cycling stability with a capacity up to 345.9 mAh g−1 at a current density of 0.1 A g−1, and maintains a capacity of 304.2 mAh g−1 even at a high current density of 5 A g−1 after 1000 cycles as anodes for sodium-ion batteries. These results indicate that the fabricated porous carbon could be a promising electrode material for sodium-ion batteries. The mechanism of such high sodium-ion storage was also discussed with the scan-rate-dependent CV curves to quantify the pseudo-capacitive contribution. [ABSTRACT FROM AUTHOR]
- Subjects :
- *SODIUM ions
*ELECTRODES
*STORAGE batteries
*POROSITY
*PERMEABILITY
*POROUS materials
Subjects
Details
- Language :
- English
- ISSN :
- 01694332
- Volume :
- 462
- Database :
- Academic Search Index
- Journal :
- Applied Surface Science
- Publication Type :
- Academic Journal
- Accession number :
- 132319137
- Full Text :
- https://doi.org/10.1016/j.apsusc.2018.08.106