期刊
ACS APPLIED MATERIALS & INTERFACES
卷 7, 期 49, 页码 27124-27130出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.5b06898
关键词
sodium-ion battery; mesoporous carbon; nitrogen-rich; capacity; cycle performance
资金
- National Key Basic Research and Development Program [2015CB251100]
- National Science Foundation of China [51572011, 21073233, 50802112]
Nitrogen-rich carbon with interconnected mesoporous structure has been simply prepared via a nano-CaCO3 template method, using polyaniline as carbon and nitrogen precursors. The preparation process includes in situ polymerization of aniline in a nano-CaCO3 aqueous solution, carbonization of the composites and removal of the template with diluted hydrochloric acid. Nitrogen sorption shows the carbon-enriched mesopores with a specific surface area of 113 m(2) g(-1). The X-ray photoelectron spectroscopy (XPS) analysis indicates that the carbon has a high nitrogen content of 7.78 at. %, in the forms of pyridinic and pyrrolic, as well as graphitic nitrogen. The nitrogen-rich mesoporous carbon shows a high reversible capacity of 338 mAh g(-1) at a current density of 30 mA g(-1), and good rate performance as well as ultralong cycling durability (110.7 mAh g(-1) at a current density of 500 mA g(-1) over 800 cycles). The excellent sodium storage performance of the nitrogen-rich mesoporous carbon is attributed to its disordered structure with large interlayer distanee, interconnected porosity, and the enriched nitrogen heteroatoms.
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