超级电容器
三聚氰胺
电容
热解
兴奋剂
材料科学
石墨烯
电容感应
介孔材料
碳纤维
化学工程
电极
纳米技术
复合材料
化学
光电子学
有机化学
计算机科学
复合数
工程类
物理化学
操作系统
催化作用
作者
Shaoling Cong,Nana Yang,Jian Liu,Hua Yuan,Qianyu Wang,Hui Zhao,Xiaoqin Wang,Shanxin Xiong,Kanshe Li,Anning Zhou
出处
期刊:ACS applied energy materials
[American Chemical Society]
日期:2022-10-18
卷期号:5 (11): 13952-13963
被引量:1
标识
DOI:10.1021/acsaem.2c02570
摘要
A category of highly capacitive N-doped carbon skeleton material (NCS) containing abundant carbon nanotubes (CNTs) is synthesized by a two-step pyrolysis method using the flower-cluster-shaped humate-Ni-BTC (HA-Ni-BTC) template and melamine particles together as precursors. As the HA-Ni-BTC/melamine mass ratio is 1:3 and the pyrolysis temperature is 700 °C, the prepared optimal NCS-700 has plentiful CNTs and graphene layers; abundant mesopores possessing a mean pore diameter of 6.1 nm; a large surface area of 296.5 m2/g; applicable nitrogen doping forms mainly containing pyrrolic N, pyridinic N, and graphitic N; and an appropriate nitrogen doping dosage of 11.8 wt %. In the field of energy storage, the NCS-700 electrode appears to have a preferable charge-transfer resistance, internal resistance, and positive capacitance performances. In particular, the NCS-700 has an excellent specific capacitance of 357 F g–1 at 0.5 A g–1, high rate capability, and good cycle stationarity because of a capacitance residual of 94.5% at 5 A g–1 after 10 000 cycles. The assembled NCS-700//AC asymmetric supercapacitor also exhibits a desirable specific capacitance (123 F g–1 at 1 A g–1), good cycle stationarity (94.8% capacity after 10 000 cycles), and high specific energy (12.3 W h kg–1 even at 300 W kg–1). Hence, the obtained NCS is a promising highly capacitive and low-energy-loss electrode material for supercapacitors.
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