Nitrogen and sulfur co-doped porous carbon nanosheets derived from willow catkin for supercapacitors
Nitrogen and sulfur co-doped porous carbon nanosheets derived from willow catkin for supercapacitors
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用于超级电容器的由柳絮衍生的氮和硫共掺杂多孔碳纳米片
DOI：
10.1016/j.nanoen.2015.10.038
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发表时间：
2016-01-01
期刊：
影响因子：
17.6
通讯作者：
Yan, Peng
中科院分区：
文献类型：
--
作者：
Li, Yiju;Wang, Guiling;Yan, Peng
采用一步热解活化法将普通生物质杨柳絮转化为相互连接的多孔碳纳米片（PCN），然后进行氮硫共掺杂.利用杨柳絮纤维独特的中空多层结构，通过调节原料与碱的质量比可以控制所得炭的孔结构。结果，氮和硫共掺杂的PCN表现出在0.5A g（-1）下298 F g（-1）和在50 A g（-1）下233 F g（-1）的高比电容，显示出优异的倍率性能。此外，该电极表现出极好的循环稳定性，在10，000次循环后只有2%的电容损失。此外，组装的对称电池具有1.8V的宽电压范围，在180 W kg（-1）下产生21.0Wh kg（-1）的显著比能量。这些令人兴奋的结果展示了用于高性能超级电容器的电极材料的绿色和低成本设计。(C)2015爱思唯尔有限公司版权所有。
A facile one-step pyrolysis and activation synthesis method is utilized to convert a common biomass of willow catkin into interconnected porous carbon nanosheets (PCNs), and then followed by effective nitrogen and sulfur co-doping. Owing to the unique hollow and multi layered structure of willow catkin fiber, the pore structure of obtained carbons can be controlled by adjusting the mass ratio of raw material to alkali. As a result, the nitrogen and sulfur co-doped PCNs demonstrate a high specific capacitance of 298 F g(-1) at 0.5 A g(-1) and 233 F g-1 at 50 A g-1, revealing excellent rate performance. In addition, the electrode demonstrates superb cycling stability with only 2% capacitance loss after 10,000 cycles. Furthermore, the assembled symmetric cell with a wide voltage range of 1.8 V yields a remarkable specific energy of 21.0 Wh kg(-1) at 180 W kg(-1). These exciting results exhibit a green and low-cost design of electrode materials for high performance supercapacitors. (C) 2015 Elsevier Ltd. All rights reserved.