Porous carbon nanosheets from coal tar for high-performance supercapacitors
Porous carbon nanosheets from coal tar for high-performance supercapacitors
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用于高性能超级电容器的煤焦油多孔碳纳米片
DOI：
10.1016/j.jpowsour.2017.04.108
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发表时间：
2017-07-31
影响因子：
9.2
通讯作者：
Qiu, Jieshan
中科院分区：
文献类型：
--
作者：
He, Xiaojun;Ma, Hao;Qiu, Jieshan
首次报道了以煤焦油为原料，采用氢氧化物模板结合原位化学活化的方法制备多孔碳纳米片。薄的PCNS具有丰富的短孔，可用于快速离子传输和高比表面积高达3235 m2 g-1的离子吸附。作为超级电容器的电极，PCNS在6 M KOH电解液中在0.05 A g（-1）下显示出296.2 F g（-1）的高电容，在20 A g（-1）下具有220.7 F g（-1）的优异倍率性能和在3.5 A g（-1）下11000次充放电循环后具有超过97.2%的上级循环稳定性.该工作为利用多环芳烃高效制备具有可调多孔结构的片状碳材料提供了一条新的途径。(C)2017爱思唯尔B. V.保留所有权利。
A hydroxide-template strategy coupled with in-situ chemical activation is reported for the first time to fabricate porous carbon nanosheets (PCNSs) from coal tar. The thin PCNSs feature abundant short pores accessible for fast ion transport and high specific surface area up to 3235 m(2) g(-1) for ion adsorption. As electrodes for supercapacitors, the PCNSs show a high capacitance of 296.2 F g(-1) at 0.05 A g(-1) in 6 M KOH electrolyte, an excellent rate performance with a capacitance of 220.7 F g(-1) at 20 A g(-1) and a superior cycle stability with over 97.2% capacitance retention after 11000 charge-discharge cycles at 3.5 A g(-1). This work paves a new way for efficient fabrication of sheet-like carbon materials with tuned porous structure from polycyclic aromatic hydrocarbons for high performance supercapacitors. (C) 2017 Elsevier B.V. All rights reserved.