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Nitrogen and Oxygen Co‐doped Hierarchical Porous Carbon: Electrode Materials for High‐Energy Density and Flexible Solid‐State Supercapacitors
ChemElectroChem ( IF 4 ) Pub Date : 2020-07-05 , DOI: 10.1002/celc.202000870
Xuehua Song 1 , Qibin Chen 1 , Enhui Shen 1 , Chenkai Li 1 , Honglai Liu 1
Affiliation  

Nitrogen and oxygen co‐doped hierarchically porous carbons (NO−HPCs) with robust tailored pore structures were fabricated through a soft chemistry synthetic strategy involving the use of F127 and the Friedel‐Crafts alkylation reaction, referred to as NO−HPC−FH. The obtained carbon of NO−HPC−FH has rich nitrogen and oxygen contents, high surface area (up to 1715 m2/g), wider range pore‐size distribution, and high pore volume (up to 2.8 cm3/g). Herein, NO−HPC−FH exhibits a high specific capacitance of 382 F/g at 0.5 A/g and an excellent cycling stability after 15 000 cycles at 20 A/g (capacitance retention is nearly 100 %), in which the contribution of the pseudocapacitance to the total specific capacitance was found to reach about 78 %. In particular, an all‐solid‐state flexible supercapacitor was fabricated, which also exhibited a high energy density of 33.4 Wh/kg at the power output of 879.9 W/kg, and a high cycling stability and flexibility. Therefore, this synthetic protocol using soft templates provides an alternative strategy to synthesize heteroatom‐doped HPCs based on “knitted” aromatic subunits and, thus, has promising potential for application in supercapacitive materials.

中文翻译:

氮和氧共掺杂的分级多孔碳:用于高能量密度和柔性固态超级电容器的电极材料

氮和氧共掺杂的分级多孔碳(NO-HPC)具有坚固的定制孔结构,这是通过软化学合成策略制备的,涉及使用F127和Friedel-Crafts烷基化反应,称为NO-HPC-FH。所获得的NO-HPC-FH碳具有丰富的氮和氧含量,较高的表面积(最大1715 m 2 / g),较宽的孔径分布和较大的孔容(最大2.8 cm 3)/G)。在此,NO-HPC-FH在0.5 A / g时表现出382 F / g的高比电容,在20 A / g时经过15 000次循环后具有出色的循环稳定性(电容保持率接近100%),其中发现伪电容占总比电容的比率约为78%。特别是,制造了一种全固态柔性超级电容器,该超级电容器在879.9 W / kg的输出功率下还显示出33.4 Wh / kg的高能量密度,以及高的循环稳定性和柔韧性。因此,这种使用软模板的合成方案为基于“针织”芳族亚基合成杂原子掺杂的HPC提供了另一种策略,因此在超电容材料中具有广阔的应用前景。
更新日期:2020-07-21
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