應用仿生拓印技術製作植物纖維立體圖案之超級電容器電極及其製法

專利類型

發明

專利國別 (專利申請國家)

中華民國

專利申請案號

107140410

專利證號

I 670737

專利獲證名稱

應用仿生拓印技術製作植物纖維立體圖案之超級電容器電極及其製法

專利所屬機關 (申請機關)

國立虎尾科技大學

獲證日期

2019/09/01

技術說明

近年來隨著軟性穿戴式電子產品的發展，可撓式儲能元件的開發逐漸受到重視。部分的超級電容器具備充電快速且具可撓的特性，可視為理想的儲能元件。由於電極與電解質接觸的面積大小是影響超級電容器儲能的重要關鍵。因此，本專利利用仿濾紙的多孔特性、仿荷葉表面之乳突狀結構與仿砂紙表面起伏的形貌，配合微拓印翻模技術製備出乙基纖維素基板。再以石墨烯與奈米碳管之混合導電懸浮液塗覆於乙基纖維素基板的表面做為電極，以增加電極與電解質間的接觸表面積。經循環伏安分析發現，由濾紙所產生的圓柱狀表面形貌，其高的比表面積，有助於比電容量的提升。而凝膠電解質內少量奈米碳管的添加有助於電解質內電阻值的降低，若能配合比表面積高的電極，則能吸附更多電荷於電極表面而得到較高的比電容量。隨後將電極、凝膠電解質與分離層以三明治結構組立成可撓式且具生物可分解性之乙基纖維素基超級電容器，發現它具有優異的撓曲性與循環穩定性。由於乙基纖維素基超級電容器具生物分解性與高電容量，未來對於綠色能源的發展，將有相當大的助益。With the development of the flexible and wearable character electric products, exploitation of the flexible energy storage elements gradually has taken seriously. Some supercapacitors have quick charge and flexible features, therefore, it could be regarded as an ideal energy storage device. Since the contact area between the electrodes and electrolyte is an important crucial point on the supercapacitor energy storage, thus, using the characteristics of the porous holes of the filter, the micron-scale nipple structure of the lotus leaf and the roughness surface of the sandpaper to prepare the ethyl cellulose (EC) based substrate for supercapacitors was considered in this study. Later, a Graphene (G) and multi-walled carbon nanotube (MWCNT) mixed conducting layer was coated on the substrate surface. From the cyclic voltammetry analysis we found that the cylindrical surface morphology replicated from filter paper possesses higher specific capacitance. The electrolyte internal resistance of the gel electrolyte could be improved by little MWCNT adding. Higher capacitance could be obtained as higher surface electrodes were employed, since more electrolyte ions were absorbed to the electrodes easily. Then the electrodes, gel electrolyte and the separator were assembled into a flexible and biodegradable the EC-based supercapacitor by a sandwich structure. The EC-based supercapacitor has an excellent flexibility and cycling stability based on the electrochemical analyzation. The EC-based supercapacitors will have considerable potential for the development of green energy in the future, since its biodegradability and high capacity property.

備註

本部(收文號1110033626)同意該校111年6月9日虎科大智財字第1113400059號號函申請終止維護專利(國立虎尾科技大學)

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