Coal tar pitch-based porous carbon by one dimensional nano-sized MgO template

Coal tar pitch-based porous carbon by one dimensional nano-sized MgO template
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一维纳米MgO模板煤焦油沥青基多孔碳

DOI:
10.1016/j.jpcs.2011.11.017
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发表时间:
2012-12
影响因子:
4
通讯作者:
Yang, Yusheng
Yang, Yusheng
中科院分区:
材料科学3区
文献类型:
--
作者:
Zhang, Wenfeng;Huang, Zheng-Hong;Cao, Gaoping;Kang, Feiyu;Yang, Yusheng

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以煤焦油沥青为碳源,采用一维非硅模板(针状纳米氧化镁)制备多孔炭。通过77 K氮吸附和XRD分析对样品进行了表征。在6 M KOH水溶液中评价了超级电容器的电化学性能。结果表明,所制备的多孔炭具有丰富的3.7-6.5nm的中孔。在空气稳定化条件下,样品具有更多的微孔,占比表面积的近50%。通过空气稳定化的具有大模板含量的多孔碳具有864 m2 g-1的高表面积。对于超级电容器电极材料,多孔碳显示出高容量和优异的功率性能,即使在30 Ag-1的电流密度下也保持100 Fg-1。
Porous carbons are derived by carbonizing coal tar pitch with one dimension non-silica template (needle-like nano-sized MgO). The samples are characterized by nitrogen adsorption at 77K and XRD analysis. The electrochemical performances for supercapacitor are evaluated in a 6M KOH aqueous solution. The results show that the as-prepared porous carbons possess abundant mesopores of 3.7–6.5nm. With air stabilization process, the samples possess more micropores, contributing nearly 50% of surface areas. The porous carbon with large template content through air stabilization possess a high surface area of 864m2g−1. For supercapacitors electrode material, the porous carbon shows a high capacity and excellent power performance, retaining 100Fg−1even at a current density of 30Ag−1.
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