金屬有機骨架(Metal–organic framework, MOF) 為一系列由金屬節點以及有機小分子連結器所組成的奈米孔洞材料。MOF 有著許多優點，例如：高規律性且互相連通的奈米孔洞，以及遠高於其他孔洞性材料的比表面積。但 MOF 幾乎是電的絕緣體，且不具有良好的化學穩定性，阻礙了MOF 在電化學領域的應用。
因此，本研究將具備高度水穩定性之以鋯為基底的 MOF – MOF-808，生長在羧基化的多壁奈米碳管(COOH-functionalized MWCNT)上，形成MOF-808-CNT 奈米複材，此奈米複材可藉由調控 MOF-808 以及 CNT 比例，改變整體奈米複材的孔洞性、比表面積，以及導電度。接著，我們以後修飾法將空間分散的鉬(VI)安裝在 MOF-808-CNT 奈米複材的高孔洞MOF 結構中作為電化學活性位點，並進行電化學還原以生成限縮在 MOF孔洞中的鉬金屬奈米粒子。我們以這些鉬後修飾奈米複材製備修飾電極，於水溶液電解液中作為超電容負極材料。鉬後修飾奈米複材不但有鉬金屬奈米粒子提供電化學活性，更可透過 CNT 於 MOF 晶體間傳遞電子，而穩定且多孔的 MOF 骨架則扮演了防止鉬金屬奈米粒子團聚的作用。結合上述優點，所得奈米複合材料之儲能表現明顯優於單純鉬後修飾的MOF-808 以及 CNT。不僅如此，經過 2000 圈的充/放電循環後，此鉬後修飾奈米複材仍維持一定的儲能表現，展現了優異的長期穩定性。綜合上述優勢，本研究中的鉬後修飾奈米複材作為超電容負極材料十分具有潛力。

In this thesis, crystals of a water-stable Zr-based metal–organic framework (MOF),
MOF-808, are directly grown on the surface of carboxylic acid-functionalized
carbon nanotubes (CNT) to synthesize the nanocomposites with tunable MOF-toCNT ratios. The crystallinity, morphology, porosity, and electrical conductivity of
all nanocomposites are characterized. To install the electrochemically active sites
within the highly porous MOF framework, the obtained MOF-808-CNT
nanocomposites are further subjected to the functionalization of spatially dispersed
Mo(VI) sites by a self-limiting process followed by the electrochemical reduction
to generate the molybdenum nanoparticles confined within the MOF pore. Thin
films of these Mo-functionalized materials are served as the pseudocapacitive
materials in aqueous electrolytes and operated in a negative potential window. By
utilizing the electrochemically active molybdenum confined within the highly
porous MOF and the electronic conduction between MOF crystals facilitated by
CNT, the optimal Mo-functionalized nanocomposite can significantly outperform
both the Mo-functionalized MOF and Mo-functionalized CNT.

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