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  • 學位論文

以生物模版法製備高效能可撓性聚苯胺複合材料在超級電容器元件上應用

Biotemplate Hierarchical Polyaniline Composite Films for High Performance Flexible Supercapacitor Devices

指導教授 : 葉瑞銘
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摘要


本論文以植物模版製作一系列的聚苯胺導電高分子複合材料薄膜電極,進行仿生結構的鑑定、薄膜電極電化學性質的特性分析以及製作超級電容器儲能元件的可行性評估。 1- 模版評估: 汲取自然生物的表面多層次性結構特性,以模版轉印技術首次複製出仿生微結構的聚苯胺導電高分子材料,本實驗以植物葉子與花瓣做為模版,透過簡單的複製方法,使得電極表面創造出豐富多層次結構與具規則性排列形態,此結構可增進電極與電解液之間氧化還原交換速率與離子擴散能力。 2- 聚苯胺與奈米碳管/石墨烯複合材料電極: 聚苯胺導電高分子可透過溶劑混合法或共聚合法與導電碳材形成複合材料,這類複合材料加上仿生結構形成3D結構電極,顯示出優越的電化學特性,在三極式系統的充放電電流1 A/g下,重量比電容的電容特性從平面結構280 F/g上升至仿生結構420 F/g,導入奈米碳管可進一步推升電容值至530 F/g,與還原石墨烯共聚合則可增加至626 F/g。此外,聚苯胺導電高分子複合材料具有良好機械性質如高可撓性,Z型摺疊不斷裂與維持高充放電循環壽命,在掃描1000次下仍保有87%初始電性。 3- 聚苯胺複合材料元件: 以聚苯胺與石墨烯複合材料電極製作成儲能元件充分展現優良的彎曲特性,超級電容器元件即使摺疊180度下,前後彎摺之循環伏安特性曲線的重疊性與再現性皆穩定,無任何負反應發生。充放次數循環1000次下的循環壽命維持率為85%。另外,仿生模版製作的元件能量密度為0.16 Wh/kg與功率密度為54.5 W/kg (元件整體重量),與文獻比較具有優越的電化學能量儲存特性。將元件進行串聯並充電至3V,串聯元件以平面形式或Z形摺疊方式(串聯長度減少十二倍)依然能點亮LED燈,充分證明以生物模版製作出仿生結構聚苯胺導電高分子複合材料電極與元件具有優越電化學特性,並且適合於設計在可撓性電子產品的儲能系統應用。

並列摘要


Highly flexible and foldable supercapacitor devices assembled using biotemplated polyaniline composite electrodes are described for the first time in this paper. This electrode architecture provides a facile fabrication route for creating abundant multiscale structures by using a plant species design based on nature resources and facilitates designing a hierarchical ordering morphology that improves the redox exchange and ionic diffusion resistance between the electrodes and electrolyte. The polyaniline composite was prepared using a replica technique and synthetized through in-situ oxidative polymerization by using aniline with conductive carbon materials. The biotemplated electrodes show a high electrochemical specific capacitance of 626 F g−1 in a three-electrode system, an excellent mechanical strength for enduring Z-type folding, and high cycling stability with capacity retention of 87% (545 F g−1). Furthermore, in cyclic voltammetry analysis, the prototype devices exhibit extraordinary elasticity without side reactions in various bending angles. Regarding electrochemical performance, the device responds with a high energy density of 5.06 Wh kg−1 and a high power density of 1685 W kg−1 when based on composite thin film electrodes and maintains 85% cycling retention as well as electrode performance after 1000 cycles. This study clearly reveals that fabricating hierarchical polyaniline composite electrodes through biotemplating yields high electrochemical performance and flexibility, making the electrodes useful for application in energy storage devices for portable electronic products.

並列關鍵字

biotemplate supercapacitor polyaniline

參考文獻


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