School of Chemical Engineering, Anhui Key Laboratory of Controllable Chemistry Reaction & Material Chemical Engineering, Hefei University of Technology, Hefei, Anhui 230009, PR China.
J Colloid Interface Sci. 2013 Mar 1;393:241-8. doi: 10.1016/j.jcis.2012.10.024. Epub 2012 Oct 23.
Nitrogen-doped porous carbon electrodes with remarkable specific capacitance have been fabricated by the rational carbonization of zinc(II)-bis(8-hydroxyquinoline) (abbr. Znq(2)) coordination polymer, and heating treatment with CO(NH(2))(2). The experimental results demonstrate that the mass ratio of carbon precursor and CO(NH(2))(2) plays a key role in the formation of porous carbon with various nitrogen content as well as specific surface areas and pore structures. The cyclic voltammetry and galvanostatic charge-discharge measurements show that the capacitive performance has been remarkably improved by doping with nitrogen. The specific capacitance of 219.2 F g(-1) is achieved at the current density of 1 A g(-1) with nitrogen-doped porous carbon, increasing up to ca. 56.8% compared to that with pristine porous carbon. The nitrogen-doped porous carbon electrode exhibits enhance capacitance retention as ca. 45.2% at 20 A g(-1) as well as cycling stability (ca. 7.6% loss after 3000 cycles). The present carbonization method as well as the nitrogen-doping method for porous carbon from coordination polymer can enrich the strategies for the production of carbon-based electrodes materials in the application of electrochemical capacitors.
通过合理碳化锌(II)-双(8-羟基喹啉)(缩写为 Znq(2))配位聚合物，并与 CO(NH(2))(2)加热处理，制备了具有显著比电容的氮掺杂多孔碳电极。实验结果表明，碳前体与 CO(NH(2))(2)的质量比在形成具有不同氮含量、比表面积和孔结构的多孔碳方面起着关键作用。循环伏安法和恒流充放电测量表明，掺杂氮可以显著提高电容性能。在电流密度为 1 A g(-1)时，氮掺杂多孔碳的比电容达到 219.2 F g(-1)，与原始多孔碳相比，提高了约 56.8%。氮掺杂多孔碳电极在 20 A g(-1)时表现出增强的电容保持率(约 45.2%)以及循环稳定性(3000 次循环后约 7.6%的损失)。这种配位聚合物多孔碳的碳化方法和氮掺杂方法可以丰富电化学电容器用碳基电极材料的制备策略。
