Al and Co co-doped α-Ni(OH)2/graphene hybrid materials with high electrochemical performances for supercapacitors

被引：76

作者：

Chen, Xu ^{[1
]}

Long, Conglai ^{[1
]}

Lin, Changpeng ^{[1
]}

Wei, Tong ^{[1
]}

Yan, Jun ^{[1
]}

Jiang, Lili ^{[1
]}

Fan, Zhuangjun ^{[1
]}

机构：

[1] Harbin Engn Univ, Key Lab Superlight Mat & Surface Technol, Minist Educ, Coll Mat Sci & Chem Engn, Harbin 150001, Peoples R China

来源：

ELECTROCHIMICA ACTA | 2014年 / 137卷

基金：

美国国家科学基金会;

关键词：

alpha-Ni(OH)(2); Metal ions doping; Graphene; Ultrahigh capacitance; Supercapacitors; NICKEL-HYDROXIDE; GRAPHENE; CARBON; NANOSHEETS; NI(OH)(2); NANOMATERIALS; FABRICATION; COMPOSITES; ELECTRODES; BEHAVIOR;

D O I：

10.1016/j.electacta.2014.05.151

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Metal ions (Al3+ and Co2+) co-doped alpha-Ni(OH)(2)/graphene hybrid materials had been successfully synthesized by a facile chemical co-precipitation route. X-ray diffraction (XRD) patterns revealed the successful phase transmission from beta-Ni(OH)(2) to alpha-Ni(OH)(2) after Al3+ doping and the continuously enlarged interlayer distance of alpha-Ni(OH)(2) after subsequent Co2+ doping. Due to its large interlayer distance, mesoporous structure and highly conductively graphene (GNS), the as-obtained Al-Co co-doped alpha-Ni(OH)(2)/GNS composite (Al-Co-Ni/GNS) showed an ultrahigh specific capacitance of 2257 F g(-1) at 2 mV s(-1) as well as good cycling stability with 77% of the initial capacitance retention after 1000 cycles in 6 M KOH aqueous solution. (C) 2014 Elsevier Ltd. All rights reserved.

引用

页码：352 / 358

页数：7

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