Electron-Conductive Metal-Organic Framework, Fe(dhbq)(dhbq = 2,5-Dihydroxy-1,4-benzoquinone): Coexistence of Microporosity and Solid-State Redox Activity

  • ACS Appl Mater Interfaces. 2021 Aug 18;13(32):38188-38193. doi: 10.1021/acsami.1c06571.
Kazuki Kon  1 ,  Kaiji Uchida  1 ,  Kentaro Fuku  1 ,  Shuntaro Yamanaka  1 ,  Bin Wu  1 ,  Daiki Yamazui  1 ,  Hiroaki Iguchi  1 ,  Hiroaki Kobayashi  2 ,  Yoshiyuki Gambe  2 ,  Itaru Honma  2 ,  Shinya Takaishi  1
Affiliations
  • 1. Department of Chemistry, Graduate School of Science, Tohoku University, Sendai, Miyagi 980-8578, Japan.
  • 2. Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Sendai, Miyagi 980-8577, Japan.
PMID: 34353024 DOI: 10.1021/acsami.1c06571
Abstract

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 × 10-6 S cm-1 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-1, corresponding to the two-electron redox process of dhbq.

Keywords
cathode material; electrical conductivity; lithium-ion battery; metal−organic frameworks; redox-active.
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