A self-template synthesis of hierarchical porous carbon foams based on banana peel for supercapacitor electrodes
A self-template synthesis of hierarchical porous carbon foams based on banana peel for supercapacitor electrodes
复制标题
基于香蕉皮的超级电容器电极多级孔泡沫碳的自模板合成
DOI：
10.1016/j.jpowsour.2012.02.089
复制
发表时间：
2012-07-01
影响因子：
9.2
通讯作者：
Wright, Dominic S.
中科院分区：
文献类型：
--
作者：
Lv, Yaokang;Gan, Lihua;Wright, Dominic S.
采用一种新颖的香蕉皮自模板法制备了多层多孔炭泡沫材料(HPCF)。香蕉皮含有生物聚合物在细胞壁形成的天然多孔结构，能够吸附离子和酚类化合物。孔表面的羧基和羟基将与锌离子配位形成锌络合物。这些类似金属有机骨架的锌配合物作为自身模板，在碳化过程中以聚合在配合物孔隙中的氨基酚呋喃树脂作为附加碳源，形成层次化的多孔结构。所得到的HPCF由具有中孔和微孔通道的大孔核心组成。独特的自支撑层状结构具有较高的比表面积(1650m(2)g(-1))，为电解液的渗透和传输提供了更有利的途径，这使得HPCF作为超级电容器电极材料具有优异的电化学性能。在6mol的L-1KOH溶液中，当电流密度为1Ag(-1)时，HPCF电极的比电容为206fg(-1)；在10Ag(-1)的电流密度下，HPCF电极的比电容仍较高(182Fg-1)，保持率为88%。(C)2012爱思唯尔B.V.保留所有权利。
Hierarchical porous carbon foams (denoted as HPCFs) is prepared through a novel self-template strategy based on banana peel. Banana peel, which contains natural porous structure formed by biopolymers in cell walls, can absorb ions and phenolic compounds. The carboxylic and hydroxyl groups on the pores' surface will coordinate with zinc ions to form zinc complexes. These zinc complexes which are similar with metal-organic frameworks are used as self-template, and the aminophenol furfural resin polymerized in the pores of complexes is used as the additional carbon source to create hierarchical porous structure during the carbonization process. The resulted HPCFs are composed of macroporous cores with mesoporous and microporous channels. The unique self-supported hierarchical structure possesses a high specific surface area (1650 m(2) g(-1)) and provides a more favorable path for electrolyte penetration and transportation, which give rise to the excellent electrochemical property of HPCFs as an electrode material for supercapacitor. The calculated specific capacitance of HPCFs electrode in 6 mol L-1 KOH is 206 Fg(-1) at a current density of 1 A g(-1), while the specific capacitance still exhibits relative high (182 F g(-1)) at a higher current density of 10 A g(-1) with the retention of 88%. (C) 2012 Elsevier B.V. All rights reserved.