Nitrogen-Rich Mesoporous Carbon as Anode Material for High-Performance Sodium-Ion Batteries

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• 作者：Huan Liu ; Mengqiu Jia ; Ning Sun ; Bin Cao ; Renjie Chen ; Qizhen Zhu ; Feng Wu ; Ning Qiao ; Bin Xu
• 刊名：ACS Applied Materials & Interfaces
• 出版年：2015
• 出版时间：December 16, 2015
• 年：2015
• 卷：7
• 期：49
• 页码：27124-27130
• 全文大小：531K
• ISSN：1944-8252

文摘

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 m² g^鈥?. The X-ray photoelectron spectroscopy (XPS) analysis indicates that the carbon has a high nitrogen content of 7.78 at.鈥?, 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^鈥? at a current density of 30 mA g^鈥?, and good rate performance as well as ultralong cycling durability (110.7 mAh g^鈥? at a current density of 500 mA g^鈥? over 800 cycles). The excellent sodium storage performance of the nitrogen-rich mesoporous carbon is attributed to its disordered structure with large interlayer distance, interconnected porosity, and the enriched nitrogen heteroatoms.