采用KOH活化高温裂解的菠菜叶,制得分级孔活性炭。低温氮气吸脱附表明利用KOH活化所制活性炭材料含有微孔、介孔和大孔,且比表面积高达2616 m2/g。 FE-SEM和FTIR表明,分级孔活性炭呈颗粒状,且表面含有富氧官能团。采用循环伏安( CV)、恒流充放电( GCD)和电化学阻抗谱( EIS)等测试技术,对分级孔活性炭进行电化学性能表征。在三电极测试体系中,分级孔活性炭在CV曲线中呈现良好矩形特征的双电层电容行为；在充放电电流密度为1 A/g下,其比电容值为238 F/g。利用该分级孔活性炭所组装的水系对称双电层电容器,其电压可达到1.2 V,同时具有可观的能量密度,较高的放电倍率及良好的电化学充放电稳定性。
Hierarchical porous activated carbon ( AC) was obtained by the carbonization of dried spinach leaves followed by acti-vation with KOH. The product was characterized by nitrogen adsorption, FT-IR, FE-SEM and electrochemical tests. The AC has a dominant number of micropores, a medium number of mesopores and a few macropores with a specific surface area up to 2 616 m2/g and a large number of oxygen-containing functional groups. The AC electrode exhibits a good double-layer capacitive behavior with a specific capacitance of 238 F/g in a 2 mol/L KOH electrolyte. A supercapacitor made of the AC has a high energy density of 10.1Wh/Kg at a current density of 0.5A/g and an excellent cyclic stability for 2000 cycles over a potential range from 0 to 1.2V.
参考文献
| [1] | Sofianc Boukhalfa;Kara Evanoff;Gleb Yushin .Atomic layer deposition of vanadium oxide on carbon nanotubes for high-power supercapacitor electrodes[J].Energy & environmental science: EES,2012(5):6872-6879. |
| [2] | Dacheng Zhang;Xiong Zhang;Yao Chen;Changhui Wang;Yanwei Ma.An environment-friendly route to synthesize reduced graphene oxide as a supercapacitor electrode material[J].Electrochimica Acta,2012:364-370. |
| [3] | 孙现众,张熊,张大成,马衍伟.活性炭基Li2SO4水系电解液超级电容器[J].物理化学学报,2012(02):367-372. |
| [4] | Meriem Anouti;Erwan Couadou;Laure Timperman;Herve Galiano.Protic ionic liquid as electrolyte for high-densities electrochemical double layer capacitors with activated carbon electrode material[J].Electrochimica Acta,2012:110-117. |
| [5] | Sanliang Zhang;Yueming Li;Ning Pan .Graphene based supercapacitor fabricated by vacuum filtration deposition[J].Journal of Power Sources,2012(May 15):476-482. |
| [6] | Jun Yan;Junpeng Liu;Zhuangjun Fan .High-performance supercapacitor electrodes based on highly corrugated graphene sheets[J].Carbon: An International Journal Sponsored by the American Carbon Society,2012(6):2179-2188. |
| [7] | Yue Hu;Yang Zhao;Yan Li;Hui Li;Huibo Shao;Liangti Qu.Defective super-long carbon nanotubes and polypyrrole composite for high-performance supercapacitor electrodes[J].Electrochimica Acta,2012:279-286. |
| [8] | Ayar Al-zubaidi;Tsuyoshi Inoue;Tomohiro Matsushita .Cyclic Voltammogram Profile of Single-Walled Carbon Nanotube Electric Double-Layer Capacitor Electrode Reveals Dumbbell Shape[J].The journal of physical chemistry, C. Nanomaterials and interfaces,2012(14):7681-7686. |
| [9] | 刘双,宋燕,马昌,史景利,郭全贵,刘朗.静电纺丝法制备多孔纳米炭纤维及其电化学性能研究[J].新型炭材料,2012(02):129-134. |
| [10] | Bo-Hye Kim;Kap Seung Yang;Yoong Ahm Kim;Yong Jung Kim;Bai An;Kyoichi Oshida .Solvent-induced porosity control of carbon nanofiber webs for supercapacitor[J].JOURNAL OF POWER SOURCES,2011(23):10496-10501. |
| [11] | Zhu H;Wang X L;Yang F et al.Promising carbon for super-capacitors derived from fungi[J].Advanced Materials,2011,23:2745-2748. |
| [12] | Elmouwahidi, A.;Zapata-Benabithe, Z.;Carrasco-Marín, F.;Moreno-Castilla, C..Activated carbons from KOH-activation of argan (Argania spinosa) seed shells as supercapacitor electrodes[J].Bioresource Technology: Biomass, Bioenergy, Biowastes, Conversion Technologies, Biotransformations, Production Technologies,2012:185-190. |
| [13] | Li, X.;Xing, W.;Zhuo, S.;Zhou, J.;Li, F.;Qiao, S.-Z.;Lu, G.-Q. .Preparation of capacitor's electrode from sunflower seed shell[J].Bioresource Technology: Biomass, Bioenergy, Biowastes, Conversion Technologies, Biotransformations, Production Technologies,2011(2):1118-1123. |
| [14] | Subramanian V;Luo C;Stephan AM;Nahm KS;Thomas S;Wei BQ .Supercapacitors from activated carbon derived from banana fibers[J].The journal of physical chemistry, C. Nanomaterials and interfaces,2007(20):7527-7531. |
| [15] | Yuan M J;Kim Y;Jia C Q .Feasibility of recycling KOH in chemical activation of Oil-sand petroleum coke[J].Canadian Journal of Chemical Engineering,2012,90:1472-1478. |
| [16] | Zhu Y W;Murali S;Stoller M D et al.Carbon-based superca-pacitors produce by activation of grapheme[J].SCIENCE,2011,332:1537-1541. |
| [17] | Yaokang Lv;Lihua Gan;Mingxian Liu;Wei Xiong;Zijie Xu;Dazhang Zhu;Dominic S. Wright .A self-template synthesis of hierarchical porous carbon foams based on banana peel for supercapacitor electrodes[J].Journal of Power Sources,2012(Jul.1):152-157. |
| [18] | Lu H L;Dai W J;Zheng M B et al.Electrochemical capaci-tive behaviors of ordered mesporous carbons with controllable pore sizes[J].Journal of Power Sources,2012,209:243-250. |
| [19] | Weixin Chen;Hao Zhang;Yaqin Huang .A fish scale based hierarchical lamellar porous carbon material obtained using a natural template for high performance electrochemical capacitors[J].Journal of Materials Chemistry: An Interdisciplinary Journal dealing with Synthesis, Structures, Properties and Applications of Materials, Particulary Those Associated with Advanced Technology,2010(23):4773-4775. |
| [20] | Choi D;Kumta PN .Synthesis, structure, and electrochemical characterization of nanocrystalline tantalum and tungsten nitrides[J].Journal of the American Ceramic Society,2007(10):3113-3120. |
| [21] | Guo-Qing Zhang;Sheng-Tao Zhang .Characterization and electrochemical applications of a carbon with high density of surface functional groups produced from beer yeast[J].Journal of solid state electrochemistry,2009(6):887-893. |
| [22] | Stoller M D;Ruoff R S .Best practice methods for determining an electrode material' s performance for ultracapacitors[J].En-ergy Enviro Sci,2010,3:1294-1301. |
| [23] | Rose, M.;Korenblit, Y.;Kockrick, E.;Borchardt, L.;Oschatz, M.;Kaskel, S.;Yushin, G. .Hierarchical micro- and mesoporous carbide-derived carbon as a high-performance electrode material in supercapacitors[J].Small,2011(8):1108-1117. |
| [24] | Wei L;Sevilla M;Fueres A B et al.Hydrothermal carboniza-tion of abundant renewable natural organic chemicals for high-performance supercapacitor electrodes[J].Adv Energy Mater,2011,1:356-361. |
| [25] | Wang YG;Xia YY .Hybrid aqueous energy storage cells using activated carbon and lithium-intercalated compounds I. The C/LiMn2O4 system[J].Journal of the Electrochemical Society,2006(2):A450-A454. |
| [26] | Lang J W;Yan X B;Liu W W et al.Influence of nitric acid modification of ordered mesoporous carbon materials on their capactive performance in different aqueous electrolytes[J].Journal of Power Sources,2012,204:220-229. |
| [27] | Haijun Yu;Jihuai Wu;Leqing Fan;Kaiqing Xu;Xin Zhong;Youzhen Lin;Jianming Lin .Improvement of the performance for quasi-solid-state supercapacitor by using PVA-KOH-KI polymer gel electrolyte[J].Electrochimica Acta,2011(20):6881-6886. |
| [28] | Sudhakar Jagannathan;Han Gi Chae;Rahul Jain;Satish Kumar .Structure And Electrochemical Properties Of Activated Polyacrylonitrile Based Carbon Fibers Containing Carbon Nanotubes[J].Journal of Power Sources,2008(2):676-684. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%