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以羧甲基纤维素钠(NaCMC)为碳源,利用直接炭化工艺(无需进一步活化)制备多孔炭材料;然后,以CO(NH2)2为氮源,形成了氮掺杂多孔炭材料.氮的存在形式包括吡啶N、石墨N和吡咯N.实验结果表明,羧甲基纤维素钠与CO(NH2)2之间的配比可以有效控制氮存在形式、含量、样品的比表面积及孔的结构等.样品的电化学性能测试表明,氮掺杂后多孔炭材料的超电容性能得到了显著提升.以carbon-N-1:20为例,其比表面积可达858m2·g-1,远高于未经氮掺杂carbon-blank的463m2·g-1,其质量比电容则由94.0F·g-1提高到了156.7F·g-1.
Porous carbon materials were prepared by direct carbonization without further activation using sodium carboxymethylcellulose (NaCMC) as carbon source, and then nitrogen-doped porous carbon materials were formed using CO (NH2) 2 as nitrogen source. The existing forms include pyridine N, graphite N and pyrrole N. The experimental results show that the ratio between sodium carboxymethyl cellulose and CO (NH2) 2 can effectively control the form and content of nitrogen, the specific surface area of the sample and pore Structure, etc. The electrochemical performance of the samples shows that the supercapacitor performance of porous carbon materials has been significantly improved after nitrogen-doped.With carbon-N-1: 20 as an example, the specific surface area of the porous carbon can reach 858m2 · g-1 Higher than that of 463m2 · g-1 without nitrogen-doped carbon-blank, the mass specific capacitance increased from 94.0F · g-1 to 156.7F · g-1.