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Oxygen Clusters Distributed in Graphene with "Paddy Land" Structure: Ultrahigh Capacitance and Rate Performance for Supercapacitors
Liu, Z; Jiang, LL; Sheng, LZ; Zhou, QH; Wei, T; Zhang, BS; Fan, ZJ; Fan, ZJ (reprint author), Harbin Engn Univ, Minist Educ, Coll Mat Sci & Chem Engn, Key Lab Superlight Mat & Surface Technol, Harbin 150001, Heilongjiang, Peoples R China.
2018-01-31
Source PublicationADVANCED FUNCTIONAL MATERIALS
ISSN1616-301X
Volume28Issue:5Pages:-
AbstractThe introduction of surface functional groups onto graphene can provide additional pseudocapacitance for supercapacitors. However, the compensation for the loss of electrical conductivity arising from the disruption of the conjugated system remains a big challenge. Here, a novel strategy is reported for the design of oxygen clusters distributed in graphene with paddy land structure via a low-temperature annealing process. Moreover, the distribution, content, and variety of oxygen groups and the conductivity of reduced graphene oxide (RGO) can be easily adjusted by annealing temperature and time. First-principles calculations demonstrate that paddy land structure exhibits conjugated carbon network, ultralow HOMO-LUMO gap, and long span of atomic charge values, which are beneficial for the enhanced pseudocapacitance and rate performance. As a result, the functionalized graphene (GO-160-8D) exhibits high specific capacitance of 436 F g(-1) at 0.5 A g(-1), exceeding the values of previously reported RGO materials, as well as excellent rate performance (261 F g(-1) at 50 A g(-1)) and cycling stability (94% of capacitance retention after 10 000 cycles). The findings may open a door for finely controlling the location and density of functionalities on graphene for applications in energy storage and conversion fields via a green and energy-efficient process.; The introduction of surface functional groups onto graphene can provide additional pseudocapacitance for supercapacitors. However, the compensation for the loss of electrical conductivity arising from the disruption of the conjugated system remains a big challenge. Here, a novel strategy is reported for the design of oxygen clusters distributed in graphene with paddy land structure via a low-temperature annealing process. Moreover, the distribution, content, and variety of oxygen groups and the conductivity of reduced graphene oxide (RGO) can be easily adjusted by annealing temperature and time. First-principles calculations demonstrate that paddy land structure exhibits conjugated carbon network, ultralow HOMO-LUMO gap, and long span of atomic charge values, which are beneficial for the enhanced pseudocapacitance and rate performance. As a result, the functionalized graphene (GO-160-8D) exhibits high specific capacitance of 436 F g(-1) at 0.5 A g(-1), exceeding the values of previously reported RGO materials, as well as excellent rate performance (261 F g(-1) at 50 A g(-1)) and cycling stability (94% of capacitance retention after 10 000 cycles). The findings may open a door for finely controlling the location and density of functionalities on graphene for applications in energy storage and conversion fields via a green and energy-efficient process.
description.department[liu, zheng ; jiang, lili ; sheng, lizhi ; zhou, qihang ; wei, tong ; fan, zhuangjun] harbin engn univ, minist educ, coll mat sci & chem engn, key lab superlight mat & surface technol, harbin 150001, heilongjiang, peoples r china ; [zhang, bingsen] chinese acad sci, inst met res, shenyang natl lab mat sci, 72 wenhua rd, shenyang 110016, liaoning, peoples r china
KeywordFunctional-groups Graphite Oxide Electrochemical Supercapacitors Reduction Electrodes Carbon Films Ultracapacitors Storage Fibers
Subject AreaChemistry, Multidisciplinary ; Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Applied ; Physics, Condensed Matter
Funding OrganizationFundamental Research Funds for the Central Universities [HEUCFG201709]; Natural Science Foundation of Heilongjiang Province [E201416]; National Natural Science Foundation of China [51672055]
Indexed BySCI
Language英语
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/79562
Collection中国科学院金属研究所
Corresponding AuthorFan, ZJ (reprint author), Harbin Engn Univ, Minist Educ, Coll Mat Sci & Chem Engn, Key Lab Superlight Mat & Surface Technol, Harbin 150001, Heilongjiang, Peoples R China.
Recommended Citation
GB/T 7714
Liu, Z,Jiang, LL,Sheng, LZ,et al. Oxygen Clusters Distributed in Graphene with "Paddy Land" Structure: Ultrahigh Capacitance and Rate Performance for Supercapacitors[J]. ADVANCED FUNCTIONAL MATERIALS,2018,28(5):-.
APA Liu, Z.,Jiang, LL.,Sheng, LZ.,Zhou, QH.,Wei, T.,...&Fan, ZJ .(2018).Oxygen Clusters Distributed in Graphene with "Paddy Land" Structure: Ultrahigh Capacitance and Rate Performance for Supercapacitors.ADVANCED FUNCTIONAL MATERIALS,28(5),-.
MLA Liu, Z,et al."Oxygen Clusters Distributed in Graphene with "Paddy Land" Structure: Ultrahigh Capacitance and Rate Performance for Supercapacitors".ADVANCED FUNCTIONAL MATERIALS 28.5(2018):-.
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