Oxygen Clusters Distributed in Graphene with "Paddy Land" Structure: Ultrahigh Capacitance and Rate Performance for Supercapacitors
文献类型：期刊论文
| 作者 | 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. |
| 刊名 | ADVANCED FUNCTIONAL MATERIALS
 |
| 出版日期 | 2018-01-31 |
| 卷号 | 28期号:5页码:- |
| 关键词 | Functional-groups Graphite Oxide Electrochemical Supercapacitors Reduction Electrodes Carbon Films Ultracapacitors Storage Fibers |
| ISSN号 | 1616-301X |
| 英文摘要 | 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.; 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. |
| 学科主题 | Chemistry, Multidisciplinary ; Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Applied ; Physics, Condensed Matter |
| 语种 | 英语 |
| 资助机构 | Fundamental Research Funds for the Central Universities [HEUCFG201709]; Natural Science Foundation of Heilongjiang Province [E201416]; National Natural Science Foundation of China [51672055] |
| 公开日期 | 2018-06-05 |
| 源URL | [http://ir.imr.ac.cn/handle/321006/79562]  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 通讯作者 | 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. |
| 推荐引用方式 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):-. |
入库方式： OAI收割
来源：金属研究所
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