Kon Kazuki, Uchida Kaiji, Fuku Kentaro, Yamanaka Shuntaro, Wu Bin, Yamazui Daiki, Iguchi Hiroaki, Kobayashi Hiroaki, Gambe Yoshiyuki, Honma Itaru, Takaishi Shinya
Department of Chemistry, Graduate School of Science, Tohoku University, Sendai, Miyagi 980-8578, Japan.
Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Sendai, Miyagi 980-8577, Japan.
ACS Appl Mater Interfaces. 2021 Aug 18;13(32):38188-38193. doi: 10.1021/acsami.1c06571. Epub 2021 Aug 5.
Redox-active metal-organic frameworks (MOFs) have great potential for use as cathode materials in lithium-ion batteries (LIBs) with large capacities because the organic ligands can undergo multiple-electron redox processes. However, most MOFs are electrical insulators, limiting their application as electrode materials. Here, we report an electron-conductive MOF with a 2,5-dihydroxy-1,4-benzoquinone (dhbq) ligand, Fe(dhbq). This compound had an electrical conductivity of 5 × 10 S cm at room temperature due to d-π interactions between the Fe ion and the ligand and the permanent microporosity. Fe(dhbq) had an initial discharge capacity of 264 mA h g, corresponding to the two-electron redox process of dhbq.
具有氧化还原活性的金属有机框架材料（MOFs）因有机配体可经历多电子氧化还原过程，在大容量锂离子电池（LIBs）中用作阴极材料具有巨大潜力。然而，大多数MOFs是电绝缘体，这限制了它们作为电极材料的应用。在此，我们报道了一种具有2,5 - 二羟基 - 1,4 - 苯醌（dhbq）配体的电子导电MOF，即Fe(dhbq)。由于Fe离子与配体之间的d - π相互作用以及永久微孔性，该化合物在室温下的电导率为5×10 S cm 。Fe(dhbq)的初始放电容量为264 mA h g ，对应于dhbq的双电子氧化还原过程。
