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Three Dimensional Sulfur‐doped Graphene Hydrogels with Tetrathiafulvalene for High Performance Supercapacitors
Author(s) -
Zhang Jingli,
Jiang Man,
Xing Lingbao,
Qin Kun,
Liu Tianzhen,
Zhou Jin,
Si Weijiang,
Cui Hongyou,
Zhuo Shuping
Publication year - 2016
Publication title -
chinese journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.28
H-Index - 41
eISSN - 1614-7065
pISSN - 1001-604X
DOI - 10.1002/cjoc.201500656
Subject(s) - supercapacitor , tetrathiafulvalene , chemistry , graphene , formamide , electrolyte , capacitance , porosity , self healing hydrogels , doping , chemical engineering , sulfur , electrochemistry , nanotechnology , polymer chemistry , molecule , organic chemistry , materials science , electrode , optoelectronics , engineering
By using tetrathiafulvalene as reducing and doping agents, three‐dimensional (3D) sulfur‐doped graphene hydrogels (SGHs) were facilely prepared in mixed solvents of dimethyl formamide and water. Several investigations reveal that TTF plays a critical role in the formation of such unique 3D architecture, as it not only reduces GO to self‐assembly into 3D structures, but also can be transformed to TTF ·+ and TTF 2+ as doping agents in the reduction process. The morphology, crystal structure, chemical bonding, elemental composition and porosity of the as‐prepared SGHs have been studied. Benefiting from well‐defined and cross‐linked 3D porous network architectures, the supercapacitors based on the SGHs in KOH electrolyte exhibited a high specific capacitance of 212.5 F·g −1 at 0.3 A·g −1 . Furthermore, this capacitance also showed good electrochemical stability and a high degree of reversibility in the repetitive charge/discharge cycling test.