Zinc oxide/reduced graphene oxide composites and electrochemical capacitance enhanced by homogeneous incorporation of reduced graphene oxide sheets in zinc oxide matrix
Chen, Yan-Li; Hu, Zhong-Ai; Chang, Yan-Qin; Wang, Huan-Wen; Zhang, Zi-Yu; Yang, Yu-Ying; Wu, Hong-Ying
2011-02-10
Source PublicationJournal of Physical Chemistry C
ISSN1932-7447
Volume115Issue:5Pages:2563-2571
AbstractZnO/reduced graphite oxide composites were synthesized using a two-step method in which KOH reacts with Zn(NO3)2 in the aqueous dispersions of graphite oxide (GO) to form a Zn(OH)2/graphite oxide precursor, followed by thermal treatment in air. It was found that the dispersion of reduced graphene oxide (rGO) sheets within composites was key for achieving an excellent capacitive performance of the samples. However, the mass ratio of ZnO to rGO determined whether rGO sheets within composites were dispersed or agglomerated. The composite achieved homogeneous incorporation of rGO sheets within the ZnO matrix when the mass ratio of ZnO to rGO was equal to 93.3:6.7. This composite, in which the weight percent of rGO was only 6.7%, appeared in the SEM images to be almost entirely filled with rGO sheets coated by ZnO and exhibited high specific capacitance and excellent cycling ability. Furthermore, the sheets overlapped to form a three-dimensional network structure, through which electrolyte ions easily access the surface of the rGO or electrochemical active sites. The homogeneously incorporated rGO sheets were shown to provide 128% enhancement in specific capacitance compared with 135 F g-1 for pure zinc oxide samples. Also, the unexpected phenomena involved in the experimental processes are discussed in detail. © 2011 American Chemical Society.
KeywordAqueous dispersions Capacitive performance Electrochemical capacitance High specific capacitances Reduced graphene oxides Reduced graphene oxides (RGO) Specific capacitance Three dimensional network structure
DOI10.1021/jp109597n
Indexed ByEI ; SCIE
Language英语
WOS Research AreaChemistry ; Science & Technology - Other Topics ; Materials Science
WOS SubjectChemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary
WOS IDWOS:000286868600150
PublisherAmerican Chemical Society
EI Accession Number20111213760033
EI KeywordsCapacitance - Dispersions - Electrolytes - Graphene oxide - Graphite - II-VI semiconductors - Potassium hydroxide
EI Classification Number701.1 Electricity: Basic Concepts and Phenomena ; 702 Electric Batteries and Fuel Cells ; 803 Chemical Agents and Basic Industrial Chemicals ; 804 Chemical Products Generally ; 804.2 Inorganic Compounds ; 951 Materials Science
Original Document TypeJournal article (JA)
Citation statistics
Cited Times:345[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttps://ir.nwnu.edu.cn/handle/39RV6HYL/29995
Collection实体学院_化学化工学院
实体学院_化学化工学院_化工系
Corresponding AuthorHu, Zhong-Ai
AffiliationNW Normal Univ, Key Lab Ecoenvironm Related Polymer Mat, Coll Chem & Chem Engn, Key Lab Polymer Mat Gansu Prov,Minist Educ, Lanzhou 730070, Peoples R China
First Author Affilication化工系
Corresponding Author Affilication化工系
First Signature Affilication化工系
Recommended Citation
GB/T 7714
Chen, Yan-Li,Hu, Zhong-Ai,Chang, Yan-Qin,et al. Zinc oxide/reduced graphene oxide composites and electrochemical capacitance enhanced by homogeneous incorporation of reduced graphene oxide sheets in zinc oxide matrix[J]. Journal of Physical Chemistry C,2011,115(5):2563-2571.
APA Chen, Yan-Li.,Hu, Zhong-Ai.,Chang, Yan-Qin.,Wang, Huan-Wen.,Zhang, Zi-Yu.,...&Wu, Hong-Ying.(2011).Zinc oxide/reduced graphene oxide composites and electrochemical capacitance enhanced by homogeneous incorporation of reduced graphene oxide sheets in zinc oxide matrix.Journal of Physical Chemistry C,115(5),2563-2571.
MLA Chen, Yan-Li,et al."Zinc oxide/reduced graphene oxide composites and electrochemical capacitance enhanced by homogeneous incorporation of reduced graphene oxide sheets in zinc oxide matrix".Journal of Physical Chemistry C 115.5(2011):2563-2571.
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