Study of Metal Bipolar Plate Characteristics for All Vanadium Redox Flow Battery
| Autor: | SUN, FENG-JUN, 孫楓鈞 |
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| Rok vydání: | 2015 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 103 All-vanadium redox flow battery（VRFB） is one of the most promising energy storage system. Internal resistance of the VRFB is an important factor affecting the efficiency of battery charge/discharge. Bipolar plate is one of the components affects the internal resistance of VRFB. This study used the metallic bipolar plate instead of using the graphite bipolar plates. Metal bipolar plate has good electrical conductivity and mechanical properties. It can reduce the internal resistance and increase the volumetric power density of VRFB. Metallic bipolar plate has corrosion problem for VRFB applications. Therefore, this study tested electrical conductivity and corrosion resistance of various conductive adhesives. We found that graphene thermosetting adhesive and commercial graphite conductive adhesive have good performance among all the adhesives tested. Corrosion resistance of the thermosetting adhesive containing 25% graphene was the best. This conductive adhesive was coated on the nickel bi-polar plate. The charge/discharge characteristics of this single cell were tested at various cell configurations, electrolytes, and charge/discharge conditions. The best charge/discharge efficiency of this single cell was 66.8 ％ at current density of 40 mA/cm2. In addition, their single cell characteristics was measured by linear scan voltammetry and electrochemical impedance spectroscopy. Results suggested that the internal impedance did not significantly reduced by applying conductive adhesive and metallic bi-polar plate. The volumetric power density of this cell was 20 W/L. It was near the volumetric power density of commercial all vanadium redox flow battery. |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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