採用軟模板策略合成UiO-66-NH2，一種具有高度化學穩定性的鋯基金屬有機骨架（Metal－Organic Framework, MOF），該骨架同時具有微孔的晶體結構和較大的中孔，然後使用合成後修飾方法，將具有氧化還原活性的錳離子配位到MOF因缺少連接器而產生缺陷的節點上，也合成了不含中孔的一般UiO-66-NH2及其安裝錳的材料。對這些材料的結晶性、孔洞性和形態進行鑑定，接著把它們在導電電極上製作成薄膜，以測量其在Na2SO4水相電解液中的電化學行為。具有氧化還原活性錳位點的MOF與奈米碳管混合形成複合材料，旨在用於水相超級電容器，並進行恆定電流測試以量化電容。
相較於安裝錳的微孔MOF，具有分級孔洞性的MOF可使更多的錳位點參與電化學反應，且在薄膜中發生離子耦合電荷跳躍的現象，速率提高了近20倍，從而在超級電容器中實現更好的性能。本篇論文的研究結果強調了在氧化還原活性MOF中創建中孔的重要性，以加速電化學反應過程中離子在薄膜內的質量傳輸，並展現了這種穩定的分級多孔MOF在電化學應用的前景。

A chemically robust zirconium-based metal–organic framework (MOF, UiO-66-NH2) possessing both micropores from its crystalline structure and large mesopores is synthesized by employing the soft-template-assisted synthesis, and redox-active manganese ions are post-synthetically coordinated on the nodes of MOF where missing-linker defects are located. Regular UiO-66-NH2 without mesopores and its manganese-installed material with a similar manganese loading per node are also synthesized. Crystallinity, porosity and morphologies of these materials are characterized. Thereafter, thin films of these MOFs are fabricated on conducting electrodes to measure their electrochemical behaviors in aqueous Na2SO4-based electrolytes, where the MOF is found structurally robust. The redox-active MOFs are also blended with carbon nanotubes to form composites, aiming for the use in aqueous supercapacitors, and galvanostatic tests are performed to quantify the capacitance.
Compared to the manganese-installed MOF without the hierarchical porosity, its counterpart possessing large mesopores can render more manganese sites electrochemically addressable and achieve an around 20-fold faster ion-coupled charge-hopping phenomenon occurring in the MOF thin film, resulting in a better performance when it is employed in supercapacitors. Findings here highlight the importance of creating large mesopores in redox-active MOFs in order to accelerate the mass transfer of ionic species within MOFs during electrochemical reactions and shed light on utilizing such hierarchically porous and stable MOFs in numerous electrochemical applications.

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