材料科学
超级电容器
碳纤维
氮化物
碳化物衍生碳
化学工程
导电体
微型多孔材料
电容
介孔材料
热分解
氮气
电极
无机化学
纳米技术
催化作用
复合材料
图层(电子)
碳纳米纤维
碳纳米管
有机化学
复合数
化学
物理化学
工程类
作者
Fuqiang Huang,Fuqiang Huang,Meng Qian,Fangfang Xu,Zhanglian Hong,Fuqiang Huang
标识
DOI:10.1002/adma.201701674
摘要
Conductive carbon nitride, as a hypothetical carbon material demonstrating high nitrogen doping, high electrical conductivity, and high surface area, has not been fabricated. A major challenge towards its fabrication is that high conductivity requires high temperature synthesis, but the high temperature eliminates nitrogen from carbon. Different from conventional methods, a facile preparation of conductive carbon nitride from novel thermal decomposition of nickel hydrogencyanamide in a confined space is reported. New developed nickel hydrogencyanamide is a unique precursor which provides self‐grown fragments of ⋅NCN⋅ or NCCN and conductive carbon (C‐sp 2 ) catalyst of Ni metal during the decomposition. The final product is a tubular structure of rich mesoporous and microporous few‐layer carbon with extraordinarily high N doping level (≈15 at%) and high extent of sp 2 carbon (≈65%) favoring a high conductivity (>2 S cm −1 ); the ultrahigh contents of nongraphitic nitrogen, redox active pyridinic N (9 at%), and pyrrolic N (5 at%), are stabilized by forming NiN bonds. The conductive carbon nitride harvests a large capacitance of 372 F g −1 with >90% initial capacitance after 10 000 cycles as a supercapacitor electrode, far exceeding the activated carbon electrodes that have <250 F g −1 .
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