Citation: HONG Xiao-Ting, WU Xiao-Hui, MO Ming-Yue, LUO Zhi-Ping, HUI Kwan San, CHEN Hong-Yu, LI Lai-sheng, HUI Kwun Nam, ZHANG Qiu-Yun. Synthesis and Electrochemical Capacitive Performances of Novel Hierarchically Micro-Meso-Structured Porous Carbons Fabricated Using Microporous Rod-Like Hydroxyapatites as a Template[J]. Acta Physico-Chimica Sinica, ;2013, 29(02): 298-304. doi: 10.3866/PKU.WHXB201211213 shu

Synthesis and Electrochemical Capacitive Performances of Novel Hierarchically Micro-Meso-Structured Porous Carbons Fabricated Using Microporous Rod-Like Hydroxyapatites as a Template

1.
1 School of Chemistry and Environment, South China Normal University; Key Laboratory of Theoretical Chemistry of Environment, Ministry of Education, Guangzhou 510006, P. R. China;
2 Department of Chemistry and Physics, Fayetteville State University, Fayetteville, NC 28301, USA;
3 Department of Systems Engineering and Engineering Management, City University of Hong Kong, Hong Kong, P. R. China;
4 Department of Materials Science and Engineering, Pusan National University, Republic of Korea

Received Date: 25 September 2012
Available Online: 21 November 2012
Fund Project: 国家自然科学基金(21203067) (21203067) 广东高校优秀青年创新人才培养计划项目(LYM11052) (LYM11052)香港创新及科技基金(ITS/244/11)资助项目 (ITS/244/11)

Electrochemical capacitors (ECs) are attractive energy storage systems for applications with high power requirements. Porous carbons are the materials that are most frequently used for the electrodes in ECs, because of their large surface area, high conductivity, chemical inertness, low cost, and tunable pore structure. Here, novel hierarchically micro-meso-structured porous carbons were synthesized, using microporous rod-like hydroxyapatite nanoparticles as a template and sucrose as a carbon source. The morphology and surface properties of the as-prepared porous carbons were characterized using X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), and Brunauer-Emmett-Teller surface analysis. The electrochemical capacitive performances were evaluated in an aqueous solution of 1 mol·L^-1 H₂SO₄ using cyclic voltammetry, electrochemical impedance spectroscopy, and constant current charge/discharge tests. The resultant carbons showed a high surface area of more than 719.7 m²·g^-1, large pore volumes of more than 1.32 cm³·g^-1, and a disordered pore structure composed of randomly distributed micropores, collapsed mesopores, and interweaving rod-like mesopores that took the shape of the template. As the carbonization temperature was increased, the density of micropores and rod-like mesopores decreased, and a tri-modal pore size distribution appeared for the carbon sample carbonized at 900 ° C. Because of these unique characteristics, the electrode material originated from the porous carbon carbonized at 900℃ exhibited od electrochemical capacitive performances.
- Rod-like mesopore,
- Micro-meso porous carbon,
- Hydroxyapatite,
- Electrochemical capacitive performance,
- Template
References
1. [1]
  
  (1) Shen, B. S.; Feng,W. J.; Lang, J.W.;Wang, R. T.; Tai, Z. X.;Yan, X. B. Acta Phys. -Chim. Sin. 2012, 28, 1726. [申保收,冯旺军, 郎俊伟, 王儒涛, 邰志新, 阎兴斌. 物理化学学报,2012, 28, 1726.] doi: 10.3866/PKU.WHXB201204261
2. [2]
  (2) Ghosh, A.; Lee, Y. H. ChemSusChem 2012, 5, 480. doi: 10.1002/cssc.v5.3
3. [3]
  (3) Zhang, L. L.; Zhao, X. S. Chem. Soc. Rev. 2009, 38, 2520. doi: 10.1039/b813846j
4. [4]
  (4) Pandolfo, A. G.; Hollenkamp, A. F. J. Power Sources 2006, 157,11. doi: 10.1016/j.jpowsour.2006.02.065
5. [5]
  (5) Simon, P.; tsi, Y. Nat. Mater. 2008, 7, 845. doi: 10.1038/nmat2297
6. [6]
  (6) Guo, P. Z.; Ji, Q. Q.; Zhang, L. L.; Zhao, S. Y.; Zhao, X. S. Acta Phys. -Chim. Sin. 2011, 27, 2836. [郭培志, 季倩倩, 张丽莉,赵善玉, 赵修松. 物理化学学报, 2011, 27, 2836.] doi: 10.3866/PKU.WHXB20112836
7. [7]
  (7) Li,W.; Zhou, J.; Xing,W.; Zhuo, S. P.; Lü, Y. M. Acta Phys. -Chim. Sin. 2011, 27, 620. [李文, 周晋, 邢伟,禚淑萍, 吕忆民. 物理化学学报, 2011, 27, 620.] doi: 10.3866/PKU.WHXB20110331
8. [8]
  (8) Liu, Y. L.; Li, L. X.; Chen, X. H.; Song, H. H. Acta Phys. -Chim. Sin. 2007, 23, 1399. [刘宇林, 李丽霞, 陈晓红,宋怀河. 物理化学学报, 2007, 23, 1399.] doi: 10.3866/PKU.WHXB20070917
9. [9]
  (9) Schüth, F. Angew. Chem. Int. Edit. 2003, 42, 3604.
10. [10]
  (10) Knox, J. H.; Kaur, B.; Millward, G. R. J. Chromatogr. 1986,352, 3. doi: 10.1016/S0021-9673(01)83368-9
11. [11]
  (11) Wu, X.; Hong, X. T.; Nan, J.; Luo, Z.; Zhang, Q.; Li, L.; Chen,H.; Hui, K. S. Microporous Mesoporous Mat. 2012, 160, 25.doi: 10.1016/j.micromeso.2012.04.013
12. [12]
  (12) Wang, H. C.; Li, B. L.; Li, J. T.; Lin, P.; Bian, X. B.; Li, J.;Zhang, B.;Wan, Z. X. Appl. Surf. Sci. 2011, 257, 4325. doi: 10.1016/j.apsusc.2010.12.051
13. [13]
  (13) Liu, B.; Shioyama, H.; Akita, T.; Xu, Q. J. Am. Chem. Soc.2008, 130, 5390. doi: 10.1021/ja7106146
14. [14]
  (14) Liu, B.; Shioyama, H.; Jiang, H.; Zhang, X.; Xu, Q. Carbon2010, 48, 456. doi: 10.1016/j.carbon.2009.09.061
15. [15]
  (15) Morishita, T.; Soneda, Y.; Tsumura, T.; Inagaki, M. Carbon2006, 44, 2360. doi: 10.1016/j.carbon.2006.04.030
16. [16]
  (16) Morishita, T.; Ishihara, K.; Kato, M.; Inagaki, M. Carbon 2007,45, 209. doi: 10.1016/j.carbon.2006.09.032
17. [17]
  (17) Xu, B.; Peng, L.;Wang, G. Q.; Cao, G. P.;Wu, F. Carbon 2010,48, 2377. doi: 10.1016/j.carbon.2010.03.003
18. [18]
  (18) Zhao, C.;Wang,W.; Yu, Z.; Zhang, H.;Wang, A.; Yang, Y.J. Mater. Chem. 2010, 20, 976. doi: 10.1039/b911913b
19. [19]
  (19) Zhang,W.; Huang, Z. H.; Cao, G.; Kang, F.; Yang, Y. J. Power Sources 2012, 204, 230. doi: 10.1016/j.jpowsour.2011.12.054
20. [20]
  (20) Xia, K.; Gao, Q.; Jiang, J.; Hu, J. Carbon 2008, 46, 1718. doi: 10.1016/j.carbon.2008.07.018
21. [21]
  (21) Li, L. Y.; Song,W. H.; Chen, T. H. Acta Phys. -Chim. Sin. 2009,25, 2404. [李丽颖, 宋文华, 陈铁红. 物理化学学报, 2009,25, 2404.] doi: 10.3866/PKU.WHXB20091020
22. [22]
  (22) Buckley, J. J.; Lee, A. F.; Olivi, L.;Wilson, K. J. Mater. Chem.2010, 20, 8056. doi: 10.1039/c0jm01500h
23. [23]
  (23) Lee, S. Y.; Park, S. J. J. Solid State Chem. 2011, 184, 2655. doi: 10.1016/j.jssc.2011.07.034
24. [24]
  (24) Sing, K. S.W.; Everett, D. H.; Haul, R. A.; Moscou,W. L.;Pierotti, R. A. Pure Appl. Chem. 1985, 57, 603. doi: 10.1351/pac198557040603
25. [25]
  (25) Hong, X. T.;Wu, X.; Zhang, Q.; Xiao, M.; Yang, G.; Qiu, M.;Han, G. Appl. Surf. Sci. 2012, 258, 4801. doi: 10.1016/j.apsusc.2012.01.102
26. [26]
  (26) Kruk, M.; Kohlhaas, K. M.; Dufour, B.; Celer, E. B.; Jaroniec,M.;Matyjaszewski,K.; Ruoff, R. S.;Kowalewski, T.Microporous Mesoporous Mat. 2007, 102, 178. doi: 10.1016/j.micromeso.2006.12.027
27. [27]
  (27) Zhao, C. R.;Wang,W. K.; Yu, Z. B.; Zhang, H.;Wang, A. B.;Yang, Y. S. J. Mater. Chem. 2010, 20, 976. doi: 10.1039/b911913b
28. [28]
  (28) Wang, D.W.; Li, F.; Liu, M.; Lu, G. Q.; Cheng, H. M. Angew. Chem. Int. Edit. 2007, 47, 373.
29. [29]
  (29) Wang, D.W.; Li, F.; Chen, Z. G.; Lu, G. Q.; Cheng, H. M.Chem. Mater. 2008, 20, 7195. doi: 10.1021/cm801729y
30. [30]
  (30) Kim, H.; Popov, B. N. Journal of the Electrochemical Society2003, 150, A1153.
31. [31]
  (31) Arulepp, M.; Permann, L.; Leis, J.; Perkson, A.; Rumma, K.;Jänes, A.; Lust, E. J. Power Sources 2004, 133, 320. doi: 10.1016/j.jpowsour.2004.03.026
1. [1]
  
  (1) Shen, B. S.; Feng,W. J.; Lang, J.W.;Wang, R. T.; Tai, Z. X.;Yan, X. B. Acta Phys. -Chim. Sin. 2012, 28, 1726. [申保收,冯旺军, 郎俊伟, 王儒涛, 邰志新, 阎兴斌. 物理化学学报,2012, 28, 1726.] doi: 10.3866/PKU.WHXB201204261
2. [2]
  (2) Ghosh, A.; Lee, Y. H. ChemSusChem 2012, 5, 480. doi: 10.1002/cssc.v5.3
3. [3]
  (3) Zhang, L. L.; Zhao, X. S. Chem. Soc. Rev. 2009, 38, 2520. doi: 10.1039/b813846j
4. [4]
  (4) Pandolfo, A. G.; Hollenkamp, A. F. J. Power Sources 2006, 157,11. doi: 10.1016/j.jpowsour.2006.02.065
5. [5]
  (5) Simon, P.; tsi, Y. Nat. Mater. 2008, 7, 845. doi: 10.1038/nmat2297
6. [6]
  (6) Guo, P. Z.; Ji, Q. Q.; Zhang, L. L.; Zhao, S. Y.; Zhao, X. S. Acta Phys. -Chim. Sin. 2011, 27, 2836. [郭培志, 季倩倩, 张丽莉,赵善玉, 赵修松. 物理化学学报, 2011, 27, 2836.] doi: 10.3866/PKU.WHXB20112836
7. [7]
  (7) Li,W.; Zhou, J.; Xing,W.; Zhuo, S. P.; Lü, Y. M. Acta Phys. -Chim. Sin. 2011, 27, 620. [李文, 周晋, 邢伟,禚淑萍, 吕忆民. 物理化学学报, 2011, 27, 620.] doi: 10.3866/PKU.WHXB20110331
8. [8]
  (8) Liu, Y. L.; Li, L. X.; Chen, X. H.; Song, H. H. Acta Phys. -Chim. Sin. 2007, 23, 1399. [刘宇林, 李丽霞, 陈晓红,宋怀河. 物理化学学报, 2007, 23, 1399.] doi: 10.3866/PKU.WHXB20070917
9. [9]
  (9) Schüth, F. Angew. Chem. Int. Edit. 2003, 42, 3604.
10. [10]
  (10) Knox, J. H.; Kaur, B.; Millward, G. R. J. Chromatogr. 1986,352, 3. doi: 10.1016/S0021-9673(01)83368-9
11. [11]
  (11) Wu, X.; Hong, X. T.; Nan, J.; Luo, Z.; Zhang, Q.; Li, L.; Chen,H.; Hui, K. S. Microporous Mesoporous Mat. 2012, 160, 25.doi: 10.1016/j.micromeso.2012.04.013
12. [12]
  (12) Wang, H. C.; Li, B. L.; Li, J. T.; Lin, P.; Bian, X. B.; Li, J.;Zhang, B.;Wan, Z. X. Appl. Surf. Sci. 2011, 257, 4325. doi: 10.1016/j.apsusc.2010.12.051
13. [13]
  (13) Liu, B.; Shioyama, H.; Akita, T.; Xu, Q. J. Am. Chem. Soc.2008, 130, 5390. doi: 10.1021/ja7106146
14. [14]
  (14) Liu, B.; Shioyama, H.; Jiang, H.; Zhang, X.; Xu, Q. Carbon2010, 48, 456. doi: 10.1016/j.carbon.2009.09.061
15. [15]
  (15) Morishita, T.; Soneda, Y.; Tsumura, T.; Inagaki, M. Carbon2006, 44, 2360. doi: 10.1016/j.carbon.2006.04.030
16. [16]
  (16) Morishita, T.; Ishihara, K.; Kato, M.; Inagaki, M. Carbon 2007,45, 209. doi: 10.1016/j.carbon.2006.09.032
17. [17]
  (17) Xu, B.; Peng, L.;Wang, G. Q.; Cao, G. P.;Wu, F. Carbon 2010,48, 2377. doi: 10.1016/j.carbon.2010.03.003
18. [18]
  (18) Zhao, C.;Wang,W.; Yu, Z.; Zhang, H.;Wang, A.; Yang, Y.J. Mater. Chem. 2010, 20, 976. doi: 10.1039/b911913b
19. [19]
  (19) Zhang,W.; Huang, Z. H.; Cao, G.; Kang, F.; Yang, Y. J. Power Sources 2012, 204, 230. doi: 10.1016/j.jpowsour.2011.12.054
20. [20]
  (20) Xia, K.; Gao, Q.; Jiang, J.; Hu, J. Carbon 2008, 46, 1718. doi: 10.1016/j.carbon.2008.07.018
21. [21]
  (21) Li, L. Y.; Song,W. H.; Chen, T. H. Acta Phys. -Chim. Sin. 2009,25, 2404. [李丽颖, 宋文华, 陈铁红. 物理化学学报, 2009,25, 2404.] doi: 10.3866/PKU.WHXB20091020
22. [22]
  (22) Buckley, J. J.; Lee, A. F.; Olivi, L.;Wilson, K. J. Mater. Chem.2010, 20, 8056. doi: 10.1039/c0jm01500h
23. [23]
  (23) Lee, S. Y.; Park, S. J. J. Solid State Chem. 2011, 184, 2655. doi: 10.1016/j.jssc.2011.07.034
24. [24]
  (24) Sing, K. S.W.; Everett, D. H.; Haul, R. A.; Moscou,W. L.;Pierotti, R. A. Pure Appl. Chem. 1985, 57, 603. doi: 10.1351/pac198557040603
25. [25]
  (25) Hong, X. T.;Wu, X.; Zhang, Q.; Xiao, M.; Yang, G.; Qiu, M.;Han, G. Appl. Surf. Sci. 2012, 258, 4801. doi: 10.1016/j.apsusc.2012.01.102
26. [26]
  (26) Kruk, M.; Kohlhaas, K. M.; Dufour, B.; Celer, E. B.; Jaroniec,M.;Matyjaszewski,K.; Ruoff, R. S.;Kowalewski, T.Microporous Mesoporous Mat. 2007, 102, 178. doi: 10.1016/j.micromeso.2006.12.027
27. [27]
  (27) Zhao, C. R.;Wang,W. K.; Yu, Z. B.; Zhang, H.;Wang, A. B.;Yang, Y. S. J. Mater. Chem. 2010, 20, 976. doi: 10.1039/b911913b
28. [28]
  (28) Wang, D.W.; Li, F.; Liu, M.; Lu, G. Q.; Cheng, H. M. Angew. Chem. Int. Edit. 2007, 47, 373.
29. [29]
  (29) Wang, D.W.; Li, F.; Chen, Z. G.; Lu, G. Q.; Cheng, H. M.Chem. Mater. 2008, 20, 7195. doi: 10.1021/cm801729y
30. [30]
  (30) Kim, H.; Popov, B. N. Journal of the Electrochemical Society2003, 150, A1153.
31. [31]
  (31) Arulepp, M.; Permann, L.; Leis, J.; Perkson, A.; Rumma, K.;Jänes, A.; Lust, E. J. Power Sources 2004, 133, 320. doi: 10.1016/j.jpowsour.2004.03.026
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沈阳化工大学材料科学与工程学院沈阳 110142

Synthesis and Electrochemical Capacitive Performances of Novel Hierarchically Micro-Meso-Structured Porous Carbons Fabricated Using Microporous Rod-Like Hydroxyapatites as a Template

References

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通讯作者: 陈斌, bchen63@163.com