하이브리드 카본이 충전된 열가소성 복합재 분리판의 특성 연구 = A Study on the Characteristics of Hybrid Carbons Filled Thermoplastic Composites Bipolar Plates

다국어 초록 (Multilingual Abstract)

A bipolar plate is an important component in a fuel cell in the point of view of cost and weight. One of the main roles of a bipolar plate is to collect and conduct the current from the anode of one cell to the cathode of the next cell. This study aimed at developing a highly conductive, lightweight, and low cost bipolar plate to be used in the Polymer electrolyte membrane (PEM) fuel cell. In this study, poly(phenylene sulfide)(PPS) filled with hybrid carbons as an alternative material for the bipolar plate of PEM fuel cells was prepared to test the feasibility. Various types and contents of carbon conducting fillers such as graphite, carbon black, carbon fibers, and carbon nano tubes(CNTs) were used for the PPS composites. Electrical conductivity and flexural properties of the composites were monitored to investigate effects of the addition of carbon filler on the properties of the composites. When the graphite is only used as conductive filler, the electrical conductivity of the composites increases, but the flexural strength decreases stiffly with increasing the content, In case of CNTs and carbon fibers, the electrical conductivity slightly increases with increasing the content of the conducting fillers, but the flexural strength shows the peak values at the optimum graphite content. This optimum graphite content was moved to lower values with increasing the CNTs or carbon fiber content. When different types of conducting fillers such as fibrous and round shape were used, the synergy effect in mechanical properties was observed. The composite materials tested in this research can be applied to a bipolar plate of PEM fuel cell with the proper selection of the combination of conducting fillers to fit the required electrical and mechanical properties.

목차 (Table of Contents)

• List of Tables = ⅲ
• List of Figures = ⅳ
• Abstract = ⅵ
• 1. 서론 = 1
• 1.1. 연구 배경 = 1
• 1.2. 연구목적 및 범위 = 3
• 2. 이론적 고찰 = 4
• 2.1. 고분자 전해질 연료전지(PEMFC) = 4
• 2.2. 분리판의 역할 및 요구특성 = 11
• 3. 실 험 = 16
• 3.1. 실험 재료 = 16
• 3.2. 복합재료 시편 제조 = 19
• 3.3. 전기전도도 측정 = 22
• 3.4. 굴곡강도 측정 = 24
• 3.5. 복합재의 파단면 morphology 관찰 = 25
• 3.6. 복합재의 열특성 및 결정화도 관찰 = 25
• 4. 결과 및 고찰 = 26
• 4.1. Graphite/PPS 복합재료 = 26
• 4.2. Graphite/ Carbon Black /PPS 복합재료 = 30
• 4.3. Graphite/ CNTs /PPS 복합재료 = 36
• 4.4. Graphite/ CF /PPS 복합재료 = 44
• 4.5. XRD 분석 = 48
• 4.6. DSC 분석 = 51
• 5. 결론 = 54
• 6. 참고문헌 = 56