以葡萄糖为碳源,由金属框架有机物( MOF)高效地合成出一种具有三维层次孔结构的多孔炭.当葡萄糖渗入到方形MOF的表面或内部空隙之后,逐步进行聚合和炭化.在此过程中,MOF分解出ZnO,ZnO进一步被基体炭或CO还原成Zn；而Zn又在炭化过程中逸出,以致形成连续的基体炭组织.当所合成的多孔炭用作双电层电容器电极材料时,在1 mo1/L NEt4 BF4/碳酸丙烯酯电解液体系中,其初始比电容达175F·g-1(电流强度0.6A·g-1),并在12A·g-1大电流密度下电容保持率高达94.2％.
A green and efficient method is presented to synthesize 3D hierarchical porous carbon from a metal organic framework (MOF) formed by 1,4-benzenedicarboxylic acid and zinc nitrate hexahydrate using glucose as the carbon precursor.Glucose was infiltrated into the external surface and/or voids of the cubic MOF,then polymerized and carbonized to form porous carbon.In the meantime,MOF was decomposed into ZnO,which was further reduced by carbon ( or CO) into Zn that evaporated during carbonization.The morphology and pore characteristics of the products can be adjusted by changing the reaction time.When the synthesized porous carbon was used as the electrode material for electric double layer capacitors,it exhibited a high initial specific capacitance of 175 F·g-1 at 0.6 A·g-1 and a high capacitance retention of 94.2％ at 12 A·g-1 in 1 mol/L NEt4BF4/propylene carbonate electrolyte.
参考文献
| [1] | PATRICE SIMON;YURY GOGOTSI .Materials for electrochemical capacitors[J].Nature materials,2008(11):845-854. |
| [2] | Wen-Cui Li;Gu-Zhen Nong;An-Hui Lu;Hao-Quan Hu .Synthesis of nanocast ordered mesoporous carbons and their application as electrode materials for supercapacitor[J].Journal of porous materials,2011(1):23-30. |
| [3] | Cathie Vix-Guterl;Elzbieta Frackowiak;Krzysztof Jurewicz .Electrochemical energy storage in ordered porous carbon materials[J].Carbon: An International Journal Sponsored by the American Carbon Society,2005(6):1293-1302. |
| [4] | Calvo E G;Ania C O;Zubizarreta L et al.Exploring new routes in the synthesis of carboon xerogels for their application in electric double-layer capacitors[J].Energy and Fuels,2010,24(06):334-3339. |
| [5] | Shaijumon MM;Ou FS;Ci LJ;Ajayan PM .Synthesis of hybrid nanowire arrays and their application as high power supercapacitor electrodes[J].Chemical communications,2008(20):2373-2375. |
| [6] | Cheol-Min Yang;Yong-Jung Kim;Morinobu Endo .Nanowindow-Regulated Specific Capacitance of Supercapacitor Electrodes of Single-Wall Carbon Nanohorns[J].Journal of the American Chemical Society,2007(26):20-21. |
| [7] | Geim AK;Novoselov KS .The rise of graphene[J].Nature materials,2007(3):183-191. |
| [8] | Wang K X;Wang Y G;Wang Y R et al.Mesoporous carbon nanofiber for supcrcapacitor application[J].Journal of Physical Chemistry C,2009,113(03):1093-1097. |
| [9] | Wang D W;Li F;Liu M et al.A 3D aperiodic hierarchical porous graphitic carbon for high rate electrochemical capacitive energy storage[J].Angewandte Chemie International Edition,2008,47(02):373-376. |
| [10] | Yan Meng;Dong Gu;Fuqiang Zhang;Yifeng Shi;Haifeng Yang;Zheng Li;Chengzhong Yu;Bo Tu;Dongyuan Zhao .Ordered Mesoporous Polymers and Homologous Carbon Frameworks:Amphiphilic Surfactant Templating and Direct Transformation[J].Angewandte Chemie,2005(43):7053-7059. |
| [11] | Woo SW;Dokko K;Nakano H;Kanamura K .Preparation of three dimensionally ordered macroporous carbon with mesoporous walls for electric double-layer capacitors[J].Journal of Materials Chemistry: An Interdisciplinary Journal dealing with Synthesis, Structures, Properties and Applications of Materials, Particulary Those Associated with Advanced Technology,2008(14):1674-1680. |
| [12] | Shiling Zhang;Ling Chen;Shuxue Zhou .Facile Synthesis of Hierarchically Ordered Porous Carbon via in Situ Self-Assembly of Colloidal Polymer and Silica Spheres and Its Use as a Catalyst Support[J].Chemistry of Materials: A Publication of the American Chemistry Society,2010(11):3433-3440. |
| [13] | Liu B;Shioyama H;Akita T;Xu Q .Metal-organic framework as a template for porous carbon synthesis[J].Journal of the American Chemical Society,2008(16):5390-5391. |
| [14] | Dingsheng Yuan;Jingxing Chen;Sanxiang Tan;Nannan Xia;Yingliang Liu .Worm-like mesoporous carbon synthesized from metal-organic coordination polymers for supercapacitors[J].Electrochemistry communications,2009(6):1191-1194. |
| [15] | Hui-Qiao Li;Rui-Li Liu;Dong-Yuan Zhao .Electrochemical properties of an ordered mesoporous carbon prepared by direct tri-constituent co-assembly[J].Carbon: An International Journal Sponsored by the American Carbon Society,2007(13):2628-2635. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%