介孔材料
氮气
材料科学
拉曼光谱
锂(药物)
X射线光电子能谱
碳纤维
傅里叶变换红外光谱
化学工程
无机化学
化学
有机化学
复合材料
催化作用
复合数
内分泌学
工程类
物理
光学
医学
作者
Ya Mao,Hui Duan,Bin Xu,Lin Zhang,Yong‐Sheng Hu,Chenhui Zhao,Zhaoxiang Wang,Liquan Chen,Yusheng Yang
摘要
Nitrogen-rich mesoporous carbon materials were obtained by pyrolyzing gelatin between 700 and 900 °C with a nano-CaCO3 template. The mesoporous structure and the high nitrogen content endowed these materials with reversible capacities up to ca. 1200 mA h g−1. The high specific surface area and the nitrogen doping are responsible for the capacity loss in the initial cycle. FTIR and XPS studies indicate that the nitrogen in the material exists in the form of pyridinic, pyrrolic/pyridonic and graphitic nitrogen. The Raman spectroscopic analysis indicates that the structure of the mesoporous carbon becomes more disordered during discharge and is restored during recharge, a behavior similar to that in nitrogen-free hard carbon materials. The reversible structural variation of these carbon materials ensures their high cyclic reversibility.
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