Cooperatively assembled, nitrogen-doped, ordered mesoporous carbon/iron oxide nanocomposites for low-cost, long cycle life sodium-ion batteries

Single pot, multi-component assembly of resol (carbon source), Pluronic F127, tetraethylorthosilicate (TEOS), dicyandiamide (nitrogen source) and iron nitrate (iron oxide source) yields nitrogen-doped ordered mesoporous carbon/iron oxide nanocomposites on carbonization. Etching the silica derived fr...

Full description

Saved in:
Bibliographic Details
Published in:Carbon (New York) 2017-05, Vol.116, p.286-293
Main Authors: Qiang, Zhe, Chen, Yu-Ming, Gurkan, Burcu, Guo, Yuanhao, Cakmak, Miko, Cavicchi, Kevin A., Zhu, Yu, Vogt, Bryan D.
Format: Article
Language:English
Subjects:
Anodes
Assembly
Carbon
Carbonization
Crystallization
Deformation
Discharge
Doping
Electrochemical analysis
Etching
Hematite
Iron oxides
Nanocomposites
Nanoparticles
Nanostructure
Nitrogen
Poloxamers
Rechargeable batteries
Silicon dioxide
Sodium-ion batteries
Surface area
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Single pot, multi-component assembly of resol (carbon source), Pluronic F127, tetraethylorthosilicate (TEOS), dicyandiamide (nitrogen source) and iron nitrate (iron oxide source) yields nitrogen-doped ordered mesoporous carbon/iron oxide nanocomposites on carbonization. Etching the silica derived from the TEOS generates micropores in the carbon framework. The incorporation of iron oxide and nitrogen doping of the carbon tends to decrease the surface area; at approximately 3.7 wt% nitrogen and 21 wt% iron oxide (OMC-3.7-21), the surface area decreases from 2162 m2/g for the undoped ordered mesoporous carbon (OMC) to 974 m2/g and the pore volume decreases from 1.62 cm3/g to 0.6 cm3/g due to deformation of the nanostructure by crystallization of γ-Fe2O3 nanoparticles and N-doping of the carbon. Despite the decreased surface area, the reversible capacity when used as anodes in a sodium ion battery is increased from 110 mAh/g (undoped OMC) to 275 mAh/g (OMC-3.7-21) due to high capacity from the γ-Fe2O3 nanoparticles and the improved capacity associated with nitrogen doping of carbon. These nitrogen-doped ordered mesoporous carbon/iron oxide nanocomposites exhibit good cycle stability with almost 99% capacity retention after 350 charge/discharge cycles. The combination of low-cost and excellent electrochemical performance makes these mesoporous nanocomposites promising anode materials for sodium-ion batteries. [Display omitted]
ISSN:0008-6223
1873-3891
DOI:10.1016/j.carbon.2017.01.093