Synthesis of Highly Uniform N-Doped Porous Carbon Spheres Derived from Their Phenolic-Resin-Based Analogues for High Performance Supercapacitors
Synthesis of Highly Uniform N-Doped Porous Carbon Spheres Derived from Their Phenolic-Resin-Based Analogues for High Performance Supercapacitors
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DOI：
10.1021/acs.iecr.8b04823
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发表时间：
2019-02-27
影响因子：
4.2
通讯作者：
Mao, Liqun
中科院分区：
文献类型：
--
作者：
Li, Xiying;Song, Yufeng;Mao, Liqun
开发了一种新的路线来合成高度均匀的N掺杂多孔碳球（NCS），其尺寸范围从86到205 nm，取决于它们的酚醛树脂基类似物的前体。固体核磁共振谱和红外光谱证实了所合成的聚合物球是由典型的酚醛树脂组成。经KOH活化处理后，直径为86 nm的NCS具有1462 m（2）g（-1）的高比表面积，并具有分级（微米和介孔）孔结构。在此基础上，制备的碳样品赋予了超级电容器在1 A g（-1）下高达247 F g（-1）的高比容量，并具有优异的倍率性能和高循环稳定性。此外，在0.1 A g（-1）的电流密度下，比能量密度为6.74 Wh kg（-1）。因此，所制备的均匀的N掺杂的多孔碳球代表了一个有前途的候选人的高效电极材料。
A novel route is developed to synthesize highly uniform N-doped porous carbon spheres (NCS) with a tailorable size ranging from 86 to 205 nm depending on their precursors of phenolic-resin-based analogues. Solid-state NMR and FTIR spectra confirm that the as-synthesized polymer spheres are composed of typical phenolic resin. After activation treatment with KOH, the NCS with a diameter of 86 nm possesses a high surface area of 1462 m(2) g(-1) coupled with hierarchical (micro and meso) pore structures. Upon these advantages, the prepared carbon sample endows the supercapacitor with high specific capacitance up to 247 F g(-1) at 1 A g(-1) with excellent rate performance and high cycling stability. Also, the specific energy density is 6.74 Wh kg(-1) at a current density of 0.1 A g(-1). Therefore, the as-prepared uniform N-doped porous carbon spheres represent a promising candidate for an efficient electrode material.