砂紙基電極對超級電容器儲能特性之影響

Influence of Sandpaper-Based Electrodes on the Electrochemical Performance in Supercapacitor

吳政鴻(Cheng-Hung Wu)

指導教授 ： 游信和

共同指導教授 ： 謝振榆(Jen-Yu Shieh)

國立虎尾科技大學/電機資訊學院/光電與材料科技研究所/碩士(2014年)

摘要

本論文利用蘋果果膠分別分散石墨烯與奈米碳管。為了防止石墨烯的堆疊與剝落，我們以奈米碳管做為間隔物與黏著劑，以1：5比例調配石墨烯和奈米碳管導電混合液，將此混合液滴覆於砂紙表面後製得可撓式電極。經循環伏安分析發現細砂紙緻密的表面形貌與高的比表面積有助於比電容值的提升。凝膠電解質能改善液態電解質容易洩漏的問題，也取代固態電解質接觸不良的問題，且與易電極間產生良好的附著性，有效滲透於砂紙電極孔隙中，產生更多的電荷吸附反應而得到較高的比電容值。將凝膠電解質、砂紙電極與多孔隔膜以三明治結構組立成可撓式超級電容器，發現它具備優異的撓曲性與循環穩定性。顯示細砂紙基超級電容器未來具有應用在可撓式與穿戴式電子產品上之潛力。

關鍵字

砂紙 ； 可撓式超級電容器 ； 凝膠電解質 ； 多孔隔膜 ； 儲能

並列摘要

Graphene and carbon nanotubes were dispersed with a pectin solution. Carbon nanotubes not only prevent the stacking of graphene sheets but also act as spacer and binder. The hybrid conductive suspension was dropped onto sandpaper, after dried it was used as the electrodes. Fine sandpaper-based electrode could promote the specific capacitance in supercapacitor, since its high surface area. We replace the liquid or solid electrolyte with gel electrolyte to prevent leakage and contact discontinuity. The larger contact surface can absorb more electrolyte ions effectively and increase the assembled ions on the surface of electrodes. The high performance supercapacitor was constructed with one separator coated with gel electrolyte inserted between two fine sandpaper-based electrodes, which were assembled into a sandwich structure by hot-pressing. By electrochemical analyzes, we found the fine sandpapaer-based supercapacitor had excellent cycle stability and flexibility. The simple and low-cost assembly of this flexible and lightweight supercapacitor means it presents potential applications on wearable electronics, flexible products, etc.

並列關鍵字

sandpaper ； flexible supercaoacitor ； gel electrolyte ； microporous separator ； energy storage

參考文獻

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