Two-Dimensional Polydopamine Positive Electrodes for High-Capacity Alkali Metal-Ion Storage

Byeongyong Lee, Kyungbin Lee, Mochen Li, Suguru Noda, Seung Woo Lee

Research output: Contribution to journalArticlepeer-review

Abstract

Redox-active organic compounds have attracted substantial attention as charge storage materials, owing to their high theoretical capacity. Herein, a two-dimensional organic electrode material is prepared by using hydrothermally polymerized dopamine molecules on graphene nanosheets. Two-dimensional polydopamine is employed as a positive electrode for storing alkali metal ions based on the surface redox reaction between oxygen functional groups and alkali ions. The two-dimensional polydopamine positive electrodes deliver high capacities of 255 mAh g−1 in Li cells, 150 mAh g−1 in Na cells, and 124 mAh g−1 in K cells at 0.1 A g−1, demonstrating a promising organic positive electrode for rechargeable alkali-ion batteries.

Original languageEnglish
Pages (from-to)1070-1077
Number of pages8
JournalChemElectroChem
Volume8
Issue number6
DOIs
Publication statusPublished - 2021 Mar 12

Keywords

  • 2D composites
  • alkali ion storage
  • graphene
  • organic electrodes
  • polydopamine

ASJC Scopus subject areas

  • Catalysis
  • Electrochemistry

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