RuO₂계 슈퍼캐패시터의 전기화학적 특성에 관한 연구 = A Study on the eletrochemical charateristics of RuO₂ supercapacitor

다국어 초록 (Multilingual Abstract)

Recently RuO₂·xH₂O is one of the best candidates for use as a pseudocapacitance material, but ruthenium is a very expensive material compared to activated carbon.
In this work, the ruthenium-carbon electrodes were prepared with sol-gel process by dipping the carbon in various concentrations of ruthenium and annealing. Their physical properties were analyzed by BET, SEM, XRD, etc. Prepared electrode was tested by cyclic voltammetry and the specfic capacitances were calculated. The effect of ruthenium content on carbon were observed.
Ruthenium-carbon electrode were used for the evaluation of various aqueous electrolytes and the adequate electrolyte were selected. Carbon electrode was prepared and used for the test of nonaqueous electrolyte. The charge-dischage cycle was examined for the performance of EDLC (electric double layer capacitor) cell fabricted in this study.
As a result, electrodes with various contents of ruthenium oxide on carbon show good performace as a capacitor electrode. The 10 wt% ruthenium-carbon electrode was tested in various electrolytes such as HCl, NaOH, HNO₃, LiCl, LiOH, H₂SO₄, etc. by cyclic voltammetry method and the specific capacitances in H₂SO₄ and HNO3 solution show the 203 F/g and 157 F/g, respecively, which are about 2-3 times larger than the other electrolytes.

목차 (Table of Contents)

• 목차
• ABSTRACT
• Ⅰ. 서론
• Ⅱ. 이론적 배경
• 2.1 Supercapacitor용 전극재료 및 전해질
• 2.1.1 Activated carbon
• 2.1.2 RuO₂
• 2.1.3 Conducting polymer
• 2.1.4 Supercapacitor용 전해질
• Ⅲ. 실험방법
• 3.1 전극의 구성재료
• 3.1.1 전극 구성재료
• 3.2 활물질의 제조
• 3.3 전극의 제조
• 3.3.1 액상 무기 전해질을 이용한 전극의 조립
• 3.4 물리-화학적 특성 분석
• 3.4.1 BET 표면적 측정
• 3.4.2 SEM (scanning electron microscopy)
• 3.4.3 XRD (x-ray diffractometry)
• 3.5 전기화학적 특성 분석
• Ⅳ. 결과 및 고찰
• 4.1 BET 표면적의 영향
• 4.2 SEM (scanning electon microscopy)
• 4.3 XRD (x-ray diffractometry)
• 4.4 액상 무기 전해질을 사용한 전극의 전기화학적 분석
• 4.4.1 Carbon 전극의 전기화학적 특성분석
• 4.4.2 Ruthenium-carbon composite 전극의 전기화학적 특성분석
• Ⅴ. 결론
• 참고문헌