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???org.dspace.app.webui.jsptag.ItemTag.dcfield??? | Value | Language |
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dc.contributor.advisor | 吳乃立(Nae-Lih Wu) | |
dc.contributor.author | Hsiao-An Pan | en |
dc.contributor.author | 潘孝安 | zh_TW |
dc.date.accessioned | 2021-06-07T23:42:32Z | - |
dc.date.copyright | 2014-07-29 | |
dc.date.issued | 2014 | |
dc.date.submitted | 2014-07-25 | |
dc.identifier.citation | 1. B. E. Conway, 'Transition from 'supercapacitor' to 'battery' behavior in
electrochemical energy storage,' J. Electrochem. Soc., 138, 1539-1548 (1991). 2. B. E. Conway, V. Birss, and J. Wojtowicz, 'The role and utilization of pseudocapacitance for energy storage by supercapacitors,' J. Power Sources, 66, 1-14 (1997). 3. X. Liu, T. Momma, X. Liu, and T. Osaka, “Dependence on the electrolyte solution of the capacitance of active carbon fiber electrode for electric double layer capacitor,” Denki Kagaku, 64, 831 (1996). 4. A. J. Bard and L. R. Faulkner, Electrochemical methods: fundamentals and applications, 2nd ed., Wiley, New York (2001). 5. E. Frackowiak and F. Béguin, 'Carbon materials for the electrochemical storage of energy in capacitors,' Carbon, 39, 937-959 (2001). 6. B. E. Conway, V. Birss, and J. Wojtowicz, 'The role and utilization of pseudocapacitance for energy storage by supercapacitors,' J. Power Sources, 66, 1-14 (1997). 7. B. E. Conway, Electrochemical supercapacitors: scientific fundamentals and technological applications, Plenum press, New York (1999). 8. D. C. Grahame, 'The Electrical double layer and the theory of electrocapillarity,' Chem. Rev., 41, 441-501 (1947). 9. S. K. Mondal and N. Munichandraiah, “Anodic deposition of porous RuO2 on stainless steel for supercapacitor studies at high current densities,” J. Power Sources, 175, 657-663 (2008). 10. T. P. Gujar, V. R. Shinde, C. D. Lokhande, W.-Y. Kim, K.-D. Jung, O.-S. Joo, “Spray deposited amorphous RuO2 for an effective use in electrochemical supercapacitor,” Electrochem. Commun., 9, 504-510 (2007). 11. H. Y. Lee and J. B. Goodenough, “Ideal supercapacitor behavior of amorphous V2O5•nH2O in potassium chloride (KCl) aqueous solution,” J. Solid State Chem., 148, 81-84 (1999). 12. J. Yang, T. Lan, J. Liu, Y. Song, and M. Wei, “Supercapacitor electrode of hollow spherical V2O5 with a high pseudocapacitance in aqueous solution,” Electrochim. Acta, 105, 489-495 (2013). 13. V. Srinivasan and J. W. Weidner, “Capacitance studies of cobalt oxide films formed via electrochemical precipitation,” J. Power Sources, 108, 15-20 (2002). 14. J. Deng, L. Kang, G. Bai, Y. Li, P. Li, X. Liu, Y. Yang, F. Gao, and W. Liang, “Solution combustion synthesis of cobalt oxides (CoO4 and Co3O4/CoO) nanoparticles as supercapacitor electrode materials,” Electrochim. Acta, 132, 127-135 (2014). 15. C. C. Hu and T. W. Tsou, “Ideal capacitive behavior of hydrous manganese oxide prepared by anodic deposition,” Electrochem. Commun., 4, 105-109 (2002). 16. J. Jiang and A. Kucernak, “Electrochemical supercapacitor material based in manganese oxide: preparation and characterization,” Electrochim. Acta, 47, 2381-2386 (2002). 17. J.-K. Chang and W.-T. Tsai, “Material characterization and electrochemical performance of hydrous manganese oxide electrodes for use in electrochemical pseudocapacitors,” J. Electrochem. Soc., 150, A1333-A1338 (2003). 18. R. N. Reddy and R. G. Reddy, “Sol-gel MnO2 as an electrode material for electrochemical capacitors,” J. Power Sources, 124, 330-337 (2003). 19. R. N. Reddy and R. G. Reddy, “Synthesis and electrochemical characterization of amorphous MnO2 electrochemical capacitor electrode material,” J. Power Sources, 132, 315-320 (2004). 20. S.-L. Kuo and N.-L. Wu, “Investigation of pseudocapacitive charge-storage reaction of MnO2•nH2O supercapacitors in aqueous electrolytes,” J. Electrochem. Soc., 153, A1317-A1324 (2006). 21. C.-Y. Chen, S.-C. Wang, Y.-H. Tien, W.-T. Tsai and C.-K. Lin, “Hybrid manganese oxide films for supercapacitor application prepared by sol–gel technique,” Thin Solid Films, 518, 1557–1560 (2009). 22. X.-H. Yang, Y.-G. Wang, H.-M. Xiong, and Y.-Y. Xia, “Interfacial synthesis of porous MnO2 and its application in electrochemical capacitor,” Electrochim. Acta, 53, 752-757 (2007). 23. Z.-S. Li, H.-Q. Wang, Y.-G. Huang, Q.-Y. Li and X.-Y. Wang, ” Manganese dioxide-coated activated mesocarbon microbeads for supercapacitors in organic electrolyte,” Colloids Surf., A, 366, 104–109 (2010). 24. R.K. Sharma, A.C. Rastogi and S.B. Desu, “Manganese oxide embedded polypyrrole nanocomposites for electrochemical supercapacitor,” Electrochim. Acta, 53, 7690–7695 (2008). 25. J. P. Zheng, P. J. Cygan, and T. R. Jow, “Hydrous ruthenium oxide as an electrode material for electrochemical capacitors,” J. Electrochem. Soc., 142, 2699-2703 (1995). 26. J. P. Zheng and T. R. Jow, “A new charge storage mechanism for electrochemical capacitors,” J. Electrochem. Soc., 142, L6-L8 (1995). 27. C. Xu, B. Li, H. Du, F. Kang, and Y. Zeng, “Supercapacitive studies on amorphous MnO2 in mild solutions,” J. Power Sources, 184, 691-694 (2008). 28. H.A. Mosqueda, O. Crosnier, L. Athouel, Y. Dandeville, Y. Scudeller, Ph. Guillemet, D.M. Schleich, and T. Brousse, “Electrolytes for hybrid carbon-MnO2 electrochemical capacitors,” Electrochim. Acta, 55, 7479-7483 (2010). 29. M. Morita, M. Goto, and Y. Matsuda, “Ethylene carbonate-based organic electrolytes for electric double-layer capacitors,” J. Appl. Electrochem., 22, 901-908 (1992). 30. T. Morimoto, K. Hiratsuka, Y. Sanada, and K. Kurihara, “Electric double-layer capacitor using organic electrolyte,” J. Power Sources, 60, 239-247 (1996). 31. S. Devaraj and N. Munichandraiah, “Effect of crystallographic structure of MnO2 on its electrochemical capacitance properties,” J. Phys. Chem. C, 112, 4406-4417 (2008). 32. Q. Feng, H. Kanoh, and K. Ooi, 'Manganese oxide porous crystals,' J. Mater. Chem., 9, 319-333 (1999). 33. O. Ghodbane, J.-L. Pascal and F. Favier, “Microstructural effects on charge-storage properties in MnO2-based electrochemical supercapacitors,” ACS Appl. Mater., 1, 1130-1339 (2009). 34. T. Brousse, M. Toupin, R. Dugas, L. Athouël, O. Crosnier and D. Bélanger, “Crystalline MnO2 as possible alternatives to amorphous compounds in electrochemical supercapacitors,” J. Electrochem. Soc., 153, A2171-A2180 (2006). 35. S. Lucchesi, U. Russo and A. D. Giusta, “Crystal chemistry and cation distribution in some Mn-rich nutral and synthetic spinels,” Eur. J. Mineral., 9, 31-42 (1997). 36. J. Vicat, E. Fanchon, P. Strobel and D. Tran Qui, “The structure of K1.33Mn8O16 and cation ordering in hollandite-type structures,” Acta Cryst., B42, 162-167 (1986). 37. H. Y. Lee, V. Manivannan, and J. B. Goodenough, “Electrochemical capacitors with KCl electrolyte,” C. R. Acad. Sci. Paris, t. 2, serie II c, 565-577 (1999). 38. H. Y. Lee and J. B. Goodenough, “Supercapacitor behavior with KCl electrolyte,” J. Solid State Chem., 144, 220-223 (1999). 39. H. Y. Lee, S. W. Kim, and H. Y. Lee, “Expansion of active site area and improvement of kinetic reversibility in electrochemical pseudocapacitor electrode,” Electrochem. Solid-State Lett., 4, A19-A22 (2001). 40. Y. K. Zhou, B. L. He, F. B. Zhang, and H. L. Li, “Hydrous manganese oxide/carbon nanotube composite electrodes for electrochemical capacitors,” J. Solid-State Electrochem., 8, 482-487 (2004). 41. X.-F. Shen, Y.-S. Ding, J. Liu, J. Cai, K. Laubernds, R. P. Zerger, A. Vasiliev, M. Aindow, and S. L. Suib, “Control of nanometer-scale tunnel sizes of porous manganese oxide octahedral molecular sieve nanomaterials,” Adv. Mater., 17, 805-809 (2005). 42. Y. U. Jeong and A. Manthiram, “Nanocrystalline manganese oxides for electrochemical capacitors with neutral electrolytes,” J. Electrochem. Soc., 149, A1419-A1422 (2002). 43. S.-C. Pang, M.A. Anderson, and T. W. Chapman, “Novel electrode materials for thin film ultracapacitors: comparison of electrochemical properties of sol-gel derived and electrodeposited manganese dioxide,” J. Electrochem. Soc., 147, 444-450 (2000). 44. D.P. Dubal, D.S. Dhawale, T.P. Gujar, and C.D. Lokhande, “Effect of different modes of electrodeposition on supercapacitive properties of MnO2 thin films,” Appl. Surf. Sci., 257, 3378-3382 (2011). 45. M. Wu, G. A. Snook, G. Z. Chen, and D. J. Fray, “Redox deposition of manganese oxide on graphite for supercapacitor,” Electrochem. Commun., 6, 449-504 (2004). 46. V. Subramanian, H. Zhu, R. Vajtai, P. M. Ajayan, and B. Wei, “Hydrothermal synthesis and pseudocapacitance properties of MnO2 nanostructures,” J. Phys. Chem. B, 109, 20207-20214 (2005). 47. R. M. Mckenzie, “The synthesis of birnessite, ryptomelane, and some other oxides and hydroxides of manganese,” Mineral. Mag., 38, 493-502 (1971). 48. S. Devaraj and N. Munichandraiah, “Electrochemical supercapacitor studies of nanostructured α-MnO2 synthesized by microemulsion method and the effect of annealing,” J. Electrochem. Soc., 154, A80-A88 (2007). 49. U. M.Patil, J. SooSohn, S. B. Kulkarni, H. G. Park a, Y. Jung, K. V. Gurav, J. H. Kim, and S. C. Jun, “A facile synthesis of hierarchical α-MnO2 nanofibers on 3D-graphene foam for supercapacitor application,” Mater. Lett., 119, 135-139 (2014). 50. M. Xu , L. Kong , W. Zhou , and H. Li, “Hydrothermal synthesis and pseudocapacitance properties of α-MnO2 hollow spheres and hollow urchins,” J. Phys. Chem. C, 111, 19141-19147 (20017). 51. S. Chen, J. Zhu, Q. Han, Z. Zheng, Y. Yang, and X. Wang, “Shape-controlled synthesis of one-dimensional MnO2 via a facile quickprecipitation procedure and its electrochemical properties,” Cryst. Growth Des., 9, 4356-4361 (2009). 52. W. Xiao, H. Xia, J. Y.H. Fuh, and L. Lu, “Growth of single-crystal α-MnO2 nanotubes prepared by a hydrothermal route and their electrochemical properties,” J. Power Sources, 193, 935-938 (2009). 53. W. Li, Q. Liu, Y. Sun, J. Sun, R. Zou, G. Li, X. Hu, G. Song, G. Ma, J. Yang, Z. Chen and J. Hu, “MnO2 ultralong nanowires with better electrical conductivity and enhanced supercapacitor performances,” J. Mater. Chem., 22, 14864-14867 (2012). 54. M. Toupin, T. Brousse, and D. Bélanger, “Charge storage mechanism of MnO2 electrode used in aqueous electrochemical capacitor,” Chem. Mater, 16, 3184-3190 (2004). 55. B. Lanson, V. A. Drits, E. Silvester, and A. Manceau, “Structure of H-exchanged hexagonal birnessite and its mechanism of formation from Na-rich monoclinic buserite at low pH,” Am. Mineral., 85, 826-838 (2000). 56. L. Athouël, F. Moser, R. Dugas, O. Crosnier, D. Be′langer, and T. Brousse, “Variation of the MnO2 birnessite structure upon charge/discharge in an electrochemical supercapacitor electrode in aqueouss Na2SO4 electrolyte,” J. Phys. Chem. C, 112, 7270-7277 (2008). 57. V. Subramanian, H. Zhu, and B. Wei, “Nanostructured MnO2: Hydrothermal synthesis and electrochemical properties as a supercapacitor electrode material,” J. Power Sources, 159, 361-364 (2006). 58. J. Ge, L. Zhuo, F. Yang, B. Tang, L. Wu, and C. Tung, “One-dimensional hierarchical layered KxMnO2 (x < 0.3) nanoarchitectures: synthesis, characterization, and their magnetic properties,” J. Phys. Chem. B, 110, 17854-17859 (2006). 59. L. Zhang, L. Kang, H. Lv, and Z. Su, “Controllable synthesis, characterization, and electrochemical properties of manganese oxide nanoarchitectures,” J. Mater. Res., 23, 781-789 (2008). 60. Z. Liu, R. Ma, Y. Ebina, K. Takada, and T. Sasaki, “Synthesis and delamination of layered manganese oxide nanobelts,” Chem. Mater, 19, 6504-6512 (2007). 61. B. R. Ma, Y. Bando, L. Zhang, and T. Sasaki, “ Layered MnO2 nanobelts: hydrothermal synthesis and electrochemical measurements,” Adv. Mater., 16, 918-922 (2004). 62. F. Jia, M. Chen , C. Wang, J. Wang, and J. Zheng, “Three-dimensional nano MnO2/CB composite and its application for electrochemical capacitor,” Mater. Lett., 78, 127-130 (2012). 63. E. Eren, H. Gumus, and A. Sarihan, “Synthesis, structural characterization and Pb(II) adsorption behavior of K- and H-birnessite samples,” Desalination, 279, 75-85 (2011). 64. A. Cormie, A. Cross, A. F. Hollenkamp, and S. W. Donne, “Cycle stability of birnessite manganese dioxide for electrochemical capacitors,” Electrochim. Acta, 55, 7470-7478 (2010). 65. F. Tingming, L. Feiquan, L. Lin, G. Liwei, and L. Fengsheng, “Catalytic thermal decomposition of ammonium perchlorate using manganese oxide octahedral molecular sieve (OMS),” Catal. Commun., 10, 108-112 (2008). 66. X. Zhang, X. Sun, H. Zhang, C. Li, and Y. Ma, “Comparative performance of birnessite-type MnO2 nanoplates andoctahedral molecular sieve (OMS-5) nanobelts of manganese dioxideas electrode materials for supercapacitor application,” Electrochim. Acta, 132, 315-322 (2014). 67. B. A. M. Figueira, R. S. Angélica, M. L. da Costa, D. Biggemann, J. M. R. Mercury, and H. Pöllmann, “Hydrothermal synthesis of Na-birnessite-type material using ores from Carajás (Amazon Region, Brazil) as Mn source,” Microporous Mesoporous Mater., 179, 212-216 (2013). 68. H. Jahn and E. Teller, “Stability of polyatomic molecules in degenerate electronic states. I. Orbital degeneracy,” Proc. R. Soc. London, Ser. A, 161, 220-235 (1937). 69. K. Y. Chunga, and K.-B. Kima, “Investigations into capacity fading as a result of a Jahn–Teller distortion in 4V LiMn2O4 thin film electrodes,” Electrochim. Acta, 49, 3327-3337 (2004). 70. P. Lucas and C. A. Angellz, “Synthesis and diagnostic electrochemistry of nanocrystalline Li1+xMn2-xO4 powders of controlled Li content,” J. Electrochem. Soc., 147, 4459-4463 (2000). 71. X. Li, Y. Xu and C.Wang, “Suppression of Jahn–Teller distortion of spinel LiMn2O4 cathode,” J. Alloys Compd., 479, 310-313 (2009). 72. C.S. Johnson, D.W. Dees, M.F. Mansuetto, M. M. Thackeray, D.R. Vissers, D. Argyriou, C.-K. Loong, and L. Christensen, “Structural and electrochemical studies of α-manganese dioxide (α-MnO2),” J. Power Sources, 68, 570-577 (1997). 73. W. Tang, X. Yang, Z. Liu, and K. Ooi, “Preparation of beta-MnO2 nanocrystal/acetylene black composites for lithium batteries,” J. Mater. Chem., 13, 2989-2995 (2003). 74. S. T. Chen, X. Li, K. Yao, F. E. H. Tay, A. Kumar, and K. Y. Zeng, “Self-polarized ferroelectric PVDF homopolymer ultra-thin films derived from Langmuir-Blodgett deposition,” Polymer, 53, 1404-1408 (2012). 75. F. Ataherian, K.-T. Lee, and N.-L. Wu, “Long-term electrochemical behaviors of manganese oxide aqueous electrochemical capacitor under reducing potentials,” Electrochim. Acta, 55, 7429-7435 (2010). 76. F. Ataherian and N.-L. Wu, “Long-term charge/discharge cycling stability of MnO2 aqueous supercapacitor under positive polarization,” J. Electrochem. Soc., 158, A422-A427 (2011). 77. Y.-C. Hsieh, K.-T. Lee, Y.-P. Lin, N.-L. Wu, and S. W. Donne, “Investigation on capacity fading of aqueous MnO2•nH2O electrochemical capacitor,” J. Power Sources, 177, 660-664 (2008). 78. M. A. V. Devanathan and B. V. K. S. R. A. Tilak, “The structure of the electrical double layer at the metal-solution interface,” Chem. Rev., 65, 635-684 (1965). 79. D. Carriazo, F. Pico, M. C. Gutierrez, F. Rubio, J. M. Rojo, and F. del Monte, “Block-Copolymer assisted synthesis of hierarchical carbon monoliths suitable as supercapacitor electrodes,” J. Mater. Chem., 20, 773-780 (2010). 80. A. Izadi-Najafabadi, S. Yasuda, K. Kobashi, T. Yamada, D. N. Futaba, H. Hatori, M. Yumura, S. Iijima, and K. Hata, “Extracting the full potential of single-walled carbon nanotubes as durable supercapacitor electrodesoperable at 4 V with high power and energy density,” Adv. Mater., 22, E253-E241 (2010). 81. W. C. Chen and T. C. Wen, “Electrochemical and capacitive properties of polyaniline-implanted porous carbon electrode for supercapacitors,' J. Power Sources, 117, 273-282 (2003). 82. T. Liu, T. V. Sreekumar, S. Kumar, R. H. Hauge, and R. E. Smalley, “SWNT/PAN composite film-based supercapacitors,” Carbon, 41, 2440-2442 (2003). 83. J. H. Park, J. M. Ko, O. O. Park, and D. W. Kim, “Capacitance properties of graphite/polypyrrole composite electrode prepared by chemical polymerization of pyrrole on graphite fiber,” J. Power Sources, 105, 20-25 (2002). 84. K. Jurewicz, S. Delpeux, V. Bertagna, F. Béguin, and E. Frackowiak, “Supercapacitors from nanotubes/polypyrrole composites,” Chem. Phys. Lett., 347, 36-40 (2001). 85. Q. Xiao and X. Zhou, “The study of multiwalled carbon nanotube deposited with conducting polymer for supercapacitor,” Electrochim. Acta, 48, 575-580 (2003). | |
dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/16634 | - |
dc.description.abstract | 本研究主要探討結晶型二氧化錳超高電容器 (包括cryptomelane (α) MnO2, 及birnessite MnO2)於高溫下的循環壽命以及其電容量衰退機制。
文獻首先藉由循環伏安法了解α-MnO2在常溫及高溫的電容量衰退現象,並觀察出高溫下的電容量衰退速度有上升趨勢。由α-MnO2在分段工作電位下的循環壽命能進一步了解其主要衰退是源自於0.7 V的陽離子遷入/遷出程序。此外,在高溫下充放電途中切換不同掃描電位,電容量衰退隨掃描速率增加而趨於嚴重。此現象代表經過高溫下充放電,α-MnO2微結構已無法提供足量電子導電度或離子導電度。同步輻射X光繞射光譜進一步顯示,經過5000圈重覆充放電,與α-MnO2層狀結構有直接關係的峰值強度降低,於高溫下較明顯。此結果是源自於Jahn-Teller效應的貢獻,該效應主要顯現在陽離子遷入時所造成的Mn原子價數變化的電位 (0.7 V)。而此價數變化能藉由充放電過程中X光吸收光譜觀察出。由於Jahn-Teller效應在高溫充放電過程所引起的α-MnO2晶格重覆扭曲,其電容量損失在高掃描速率下尤其明顯。 研究第二部分著重於birnessite樣品在高溫下的循環穩定性。在使用與α-MnO2相同漿料比例塗佈birnessite樣品條件下,其電容量在室溫及高溫循環5000圈後僅存30%及27%。藉由添加較多比例接著劑,能提升程度上的穩定度。如α-MnO2,經充放電後birnessite樣品在高掃描速率下電容量衰退較明顯。而結合測量出的整體電極電阻率的結果,能了解此樣品電容量損失主要源自於電極整體結構崩解,造成的電子導電度下降。而此結構崩解是由於birnessite MnO2粒子充放電過程中劇烈的膨脹/收縮,進而造成PVdF接著劑的鬆弛現象並使電容量衰減。當工作電位範圍縮小時,限制了陽離子在充放電過程中遷入/遷出的量,故在常溫及高溫下兩者電容量下降的幅度相近。 | zh_TW |
dc.description.abstract | Cycling stability at elevated temperature (50°C) of supercapacitors made of two different MnO2 polymorphs, including cryptomelane (α), birnessite were investigated.
In the first part of the thesis, the cycle life of the α-MnO2 was analyzed by the cyclic voltammetry, which was found to be worse at 50°C. The cycling performances obtained from different potential regions reveals that the capacitance fading of the α-MnO2 while cycling at full range is caused by the intercalation/deintercalation process mainly occurs at 0.7 V. In addition, from the cycling tests in alternative scan tare, the capacitance fading of the sample became more dramatic for higher scan rate at 50°C. This means that the structure could not supply well enough electronic or ionic transfer rate after cycled at 50°C for 5000 times. From the synchrotron X-ray diffraction analysis, the peak intensity that related to the layer structure had decreased after 5000 cycles at room temperature, and decreased to an even lower value after cycled at elevated temperature. This result is believed to be caused by the Jahn-Teller effect which mainly presents at the potential (around 0.7 volts) for cations to intercalate into the bulk material. In-situ XAS was further done to investigate the valence change of the Mn atoms which confirmed the intercalation/deintercalation behavior at 0.7 Volts. The repeated volume change of the unit cell attributed from the Jahn-Teller effect during the charge/discharge upon cycling at elevated temperature leads to loss of capacitance, especially at higher scan rate. High-temperature (50°C) cycling stability of birnessite MnO2 was also examined, while different finding comparing to the α-MnO2 was obtained. For the birnessite MnO2, only 30 and 27 percent of initial specific capacitance were remained after 5000 cycles under the same composition of electrode used for α-MnO2 in room temperature and 50°C respectively, which can be improved by adding more binder. Same procedure of changing the scan rate during the cycling test as we did for α-MnO2 samples was carried out for birnessite samples as well. Combining with the resistivity measurements of the electrode, results show that the decay of the capacitance for the birnessite sample at elevated temperature is due to the overall structure breakdown which increases the electronic resistivity of the electrode. The reason of the structure breakdown is the severe swelling and shrinking of the birnessite MnO2 that stretch and loose the PVdF binder, which causes the fatigue of the binder after 5000 cycles. The amount of cations intercalating or deintercalating through the layer structures was limited for smaller potential regions, so the difference between the samples that cycled at room temperature and 50°C was therefore unobvious in these cases. | en |
dc.description.provenance | Made available in DSpace on 2021-06-07T23:42:32Z (GMT). No. of bitstreams: 1 ntu-103-R01524032-1.pdf: 5428254 bytes, checksum: 98a3dccad000e58355f657c2151203b9 (MD5) Previous issue date: 2014 | en |
dc.description.tableofcontents | Chapter 1 Introduction…1
1.1 Background…1 1.2 Motivations and Objectives…2 Chapter 2 Theory and Literature Review…3 2.1 Introduction to Electrochemical Capacitors…3 2.1.1 Introduction to Energy Storage Devices…3 2.1.2 Classifications of Electrochemical Capacitors…6 2.1.3 Models and Theory for Electric Double Layer…8 2.1.4 Electrochemical Characteristics of Capacitors…11 2.2 Development of Electrochemical Capacitors…13 2.2.1 Electrode Materials…13 2.2.2 Electrolyte…15 2.3 Introduction to Manganese Dioxide…16 2.3.1 Crystalline Structure and Characteristic…16 2.3.2 Synthesis and Development…18 2.4 Cryptomelane (α) MnO2…22 2.4.1 Structure, Synthesis and Development…22 2.4.2 Charge Storage Mechanism…24 2.4.3 Jahn-Teller Effect…24 2.5 Birnessite MnO2…26 2.5.1 Structure and Development…26 2.5.2 Charge Storage Mechanism…28 2.6 Experiment Technique…29 2.6.1 X-ray Absorption Spectroscopy…29 Chapter 3 Experimental…30 3.1 Synthesis of Electrode Materials…30 3.1.1 Synthesis of Birnessite MnO2…31 3.1.2 Synthesis of α-MnO2…32 3.2 Electrochemical characterization…33 3.2.1 Preparation of Electrodes…33 3.2.2 Cyclic Voltammetry…33 3.3 Structural Characterization…34 3.3.1 Morphology Characterization…34 3.3.2 X-ray diffraction analysis…35 3.3.3 X-ray absorption spectroscopy…36 Chapter 4 Cycling stability of α-MnO2 under elevated temperature…38 4.1 Cycling stability of α-MnO2 in aqueous K2SO4 electrolyte …38 4.2 Structure analysis of α-MnO2 electrode…62 4.3 Explaining the temperature effect on α-MnO2…72 Chapter 5 Cycling stability of birnessite MnO2 under elevated temperature…76 5.1 Cycling stability of birnessite MnO2 in aqueous K2SO4 electrolyte…76 5.2 Structure analysis of α-MnO2 electrode…82 5.3 Explaining the temperature effect on birnessite MnO2 …103 Chapter 6 Conclusions…104 Reference…105 | |
dc.language.iso | en | |
dc.title | 結晶型氧化錳超高電容器於高溫循環穩定性之研究 | zh_TW |
dc.title | Cycling Stability of Manganese Dioxide Polymorph Supercapacitors at Elevated Temperature | en |
dc.type | Thesis | |
dc.date.schoolyear | 102-2 | |
dc.description.degree | 碩士 | |
dc.contributor.oralexamcommittee | 胡啟章,張仍奎 | |
dc.subject.keyword | 超高電容器,二氧化錳,結晶型,循環穩定性,高溫, | zh_TW |
dc.subject.keyword | Supercapacitor,MnO2,Polymorphs,Cycling stability,Elevated temperature, | en |
dc.relation.page | 114 | |
dc.rights.note | 未授權 | |
dc.date.accepted | 2014-07-25 | |
dc.contributor.author-college | 工學院 | zh_TW |
dc.contributor.author-dept | 化學工程學研究所 | zh_TW |
Appears in Collections: | 化學工程學系 |
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ntu-103-1.pdf Restricted Access | 5.3 MB | Adobe PDF |
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