共 51 条
High-performance supercapacitor electrodes based on graphene hydrogels modified with 2-aminoanthraquinone moieties
被引:171
作者:

Wu, Qiong
论文数: 0 引用数: 0
h-index: 0
机构:
Tsinghua Univ, Dept Chem, Beijing 100084, Peoples R China Tsinghua Univ, Dept Chem, Beijing 100084, Peoples R China

Sun, Yiqing
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h-index: 0
机构:
Tsinghua Univ, Dept Chem, Beijing 100084, Peoples R China Tsinghua Univ, Dept Chem, Beijing 100084, Peoples R China

Bai, Hua
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h-index: 0
机构:
Tsinghua Univ, Dept Chem, Beijing 100084, Peoples R China Tsinghua Univ, Dept Chem, Beijing 100084, Peoples R China

Shi, Gaoquan
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h-index: 0
机构:
Tsinghua Univ, Dept Chem, Beijing 100084, Peoples R China Tsinghua Univ, Dept Chem, Beijing 100084, Peoples R China
机构:
[1] Tsinghua Univ, Dept Chem, Beijing 100084, Peoples R China
基金:
中国国家自然科学基金;
关键词:
COMPOSITE FILMS;
GRAPHITE OXIDE;
PAPER;
BATTERIES;
ENERGY;
TRANSPARENT;
POLYANILINE;
NANOSHEETS;
REDUCTION;
POLYMER;
D O I:
10.1039/c1cp20980a
中图分类号:
O64 [物理化学(理论化学)、化学物理学];
学科分类号:
070304 ;
081704 ;
摘要:
2-Aminoanthraquinone (AAQ) molecules were covalently grafted onto chemically modified graphene (CMG), and the AAQ functionalized CMG sheets were self-assembled into macroporous hydrogels for supercapacitor electrodes. The electrode based on the AAQ modified self-assembled graphene hydrogel (AQSGH) showed a high specific capacitance of 258 F g(-1) at a discharge current density of 0.3 A g(-1), which is much larger than that of a pure graphene hydrogel (193 F g(-1)). Furthermore, the AQSGH electrode exhibited excellent rate capability and a long cycle life. This is mainly due to the covalently bonded AAQ moieties contributing additional redox capacitance. Furthermore, the highly conductive graphene hydrogel scaffold provided a large specific surface area for forming electric double layers and convenient routes for charge transfer and electrolyte diffusion.
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页码:11193 / 11198
页数:6
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