멜라민과의 초음파 분산을 통해 질소 도핑된 탄소나노튜브의 열전지 전극 특성 연구

다국어 초록 (Multilingual Abstract)

Thermocells are recognized as effective means of utilizing thermal energy by converting it into electrical energy through the Seebeck effect. To address low conversion efficiency and power density issues, research has focused on carbon nanomaterials with large surface areas and high electron transfer rates. In this study, our aim was to enhance the electrochemical properties of electrodes by nitrogen doping. Nitrogen-doped carbon nanotubes (CNTs) were fabricated as thermal battery electrodes using melamine as the nitrogen source. Mechanical mixing of melamine and CNTs was followed by tip sonication and stirring, and doping was carried out through heat treatment at 800°C under N2 atmosphere for 2 hours. The prepared nitrogen-doped CNTs were characterized for surface eara and nitrogen content using XPS, Raman spectroscopy, and SEM. Electrochemical tests, including voltage-current graphs, power density-current graphs, electrochemical impedance spectroscopy (EIS), and internal resistance measurements, were conducted. Results showed that research utilizing carbon nanomaterials with large surface areas and high electron transfer rates led to significant advancements in thermocell technology. Specifically, nitrogen-doped samples exhibited significantly lower resistance in electrochemical tests compared to undoped samples, with samples treated using the tip sonication method showing the lowest charge transfer resistance. This highlights the importance of nitrogen doping and oxygen content in enhancing the electrochemical performance of thermocells.

목차 (Table of Contents)

• 1. 서론 1
• 1.1 연구 배경 및 목적 1
• 1.2 질소 도핑된 CNT 4
• 1.3 열전지 7
• 2. 실험 방법 10
• 2.1 재료 10
• 2.2 질소 도핑된 CNT 제조 11
• 2.3 CNT 전극 제조 13
• 2.4 열전지 제작 13
• 2.5 분석 15
• 2.5.1 소재 물성 분석 15
• 2.5.2 전기화학적 성능 분석 15
• 3. 결론 및 고찰 16
• 3.1 질소 도핑된 CNT의 특성 16
• 3.1.1 Raman 분석 16
• 3.1.2 XPS 분석 20
• 3.1.3 SEM 분석 29
• 3.2 열전지의 전기화학적 특성 분석 31
• 3.2.1 Voltage-current, Power density 31
• 3.2.2 EIS 및 내부 저항 분석 32
• 4. 결론 37
• 5. 참고 문헌 38