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系統識別號 U0026-1008201520300500
論文名稱(中文) 氮摻雜對孔洞碳材電容表現的影響
論文名稱(英文) Effects of Nitrogen Doping on the Capacitive Performance of Porous Carbons
校院名稱 成功大學
系所名稱(中) 化學工程學系
系所名稱(英) Department of Chemical Engineering
學年度 103
學期 2
出版年 104
研究生(中文) 蔡金榮
研究生(英文) Yohan Yuwana
學號 N36027105
學位類別 碩士
語文別 英文
論文頁數 103頁
口試委員 指導教授-鄧熙聖
口試委員-許梅娟
口試委員-詹正雄
口試委員-蔡建成
中文關鍵字 none 
英文關鍵字 ammonia doping  activated porous carbons  nitrogen doping  EDLC  Na2SO4 
學科別分類
中文摘要 none
英文摘要 Effect of nitrogen doping on the capacitive performance of porous carbons were observed by ammonia doping during heat treatment at high temperature. The activated mesophase pitch and phenol formaldehyde carbons were mixed with carbon nanotube then were doped ammonia doping at 700 C for 30 min, 1 and 2 hours. The cell equipped with each nitrogen doping on porous carbons in 1 M Na2SO4 solution can reach a high capacitance value of 250 F g-1 at 0.05 A g-1 and retention 51 % at 100 A g-1. Nitrogen content on carbon surface can increase the polarity and hydrophobicity of carbon and facilitates the wettability between electrode and electrolyte. Wettability of inner-pore carbon surface, will make the electrolyte ions penetrate into inner pores easily and promote the utilization of charge storage. Moreover, because of nitrogen doping function as non-faradaic process or electrostatics as EDLC then N-Q and N-X which positively charges affect electron transfer through the carbon frameworks. As the result, the symmetric cells can deliver high energy of 22 kW kg-1 at low discharge rate with superior stability of 92% capacitance retention after 10,000 cycles of galvanostatic charge-discharge.

Keywords: ammonia doping, activated porous carbons, nitrogen doping, EDLC, Na2SO4
論文目次 Contents

Abstract i
Acknowledge ii
Contents iii
List of figures vi
List of table ix

Chapter 1 Introduction
1-1 Introduction to supercapacitor 1
1-2 EDLC Material 4
1-2-1 Carbon as an EDLC Material 4
1-2-2 Phenolic Resin 6
1-2-3 Electrolyte as an EDLC Material 12
1-2-4 Separator as an EDLC Material 14
1-3 Nitrogen enrichment as for supercapacitor 14

Chapter 2 Literature Review
2-1 Synthesis of Nitrogen Doping 17
2-1-1 Post-treatment processing 17
2-1-2 Transformation and decomposition nitrogen containing groups 19
2-2 Analysis of physical carbon material properties 21
2-2-1 Adsorption theory 21
2-2-1-1 Adsorption Isotherm 22
2-2-1-2 Brunauer Emmett Teller (BET) 25
2-2-1-3 Dubinin-Radushevich (D-R) 26
2-2-1-4 Barrett Joyner Halenda (BJH) 27
2-2-1-5 Density Functional Theory (DFT) 28
2-3 Electrical Double Layer Capacitor (EDLC) 29
2-3-1 Capacitor 29
2-3-2 Parallel Plate Capacitor 30
2-3-3 Capacitor in Series 32
2-3-4 Capacitor in Parallel 33
2-3-5 Two and three cell electrode Capacitor 35
2-4 Structure and Concept of Electric Double Layer 37
2-4-1 Electric Double Layer principle 38
2-4-2 Helmholtz Electric Double Layer Model 39
2-4-3 Stern Electric Double Layer Model 40
2-4-4 Electric Double-Layer Structure 42
2-5 Electrochemical Test Method 44
2-5-1 Cyclic Voltammetry 44
2-5-2 Electrochemical charge and discharge 46
2-5-3 Impedance Theory 48
2-5-3-1 Resistance 49
2-5-3-2 Capacitance 49
2-5-3-3 Resistor and capacitor in series 51
2-5-3-4 Resistor capacitor in parallel 52

Chapter 3 Experimental Methods and Equipment
3-1 Chemicals, materials and equipment 55
3-1-1 Chemicals and materials 55
3-1-2 Instruments and Laboratory equipment 56
3-2 Preparation of porous Carbon materials 57
3-2-1 Preparation of Phenol formaldehyde Carbon 57
3-2-1-1 Preparation of Phenol formaldehyde Resin 57
3-2-1-2 Chemical activation and pre-oxidation 59
3-2-2 Preparation of Activated meso pitch carbon 61
3-2-3 Ball milling and the CNT addition 61
3-2-4 Heat Treatment for PFR-mt and aMP-mt 61
3-2-5 Nitrogen Doping process 62
3-3 Characterization of materials 63
3-3-1 Nitrogen adsorption-desorption 63
3-3-2 Energy-disperse X-ray Spectroscopy (EDS) 63
3-3-3 Four-point probe conductivity test 63
3-4 Electrochemical characteristics 64
3-4-1 Capacitor assembling 64
3-4-2 CYCLIC VOLTAMMETRIC MEASUREMENT 65
3-4-3 Galvanostatic Charge and discharge measurement 66
3-4-4 AC Electrochemical Impedance Spectroscopy (EIS) 66



Chapter 4 Result and Discussion
4-1 Physical properties of porous carbon 67
4-1-1 Nitrogen adsorption-desorption Analysis 67
4-1-2 Energy-disperse X-ray Spectroscopy (EDS) 73
4-1-3 Four probes conductivity analysis 74
4-2 Electrochemical characterization 77
4-2-1 Analysis and discussion of the cyclic voltammograms 77
4-2-1-1 A three electrochemical cell 77
4-2-1-2 A two cell cyclic voltammetric 81
4-2-2 Analysis and discussion of the Charge and discharge Galvanometric 83
4-2-3 Analysis and discussion of the resistance of IR drop and EIS 85
4.3 Electrochemical supercapacitor behaviour 89
4.4 Literature Survey 91

Chapter 5 Conclusion 95

Reference 97
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