Bioinspired redox-coupled conversion reaction in FeOOH-acetate hybrid nanoplatelets for Na ion battery

Bum Chul Park, Jiung Cho, Jiliang Zhang, Mawuse Amedzo-Adore, Dae Beom Lee, Sung Chul Kim, Jong Seong Bae, Young Rang Uhm, Sang Ok Kim, Jehyoung Koo, Yong Mook Kang, Young Keun Kim

Research output: Contribution to journalArticlepeer-review


The considerable interest in rechargeable batteries is causing a rapid increase in demand and a surge in the price of raw materials. Earth-abundant iron oxyhydroxide (FeOOH) is a promising candidate as an anode material for sodium-ion rechargeable batteries (SIBs). However, the application of FeOOH is hindered by numerous technical limitations arising mainly from the irreversibility of the conversion reaction. Here, we manipulate biotic Fe redox from FeOOH-acetate hybrid nanoplatelets (FAHPs) to make the resulting conversion reaction with Na ions highly reversible. The extended lepidocrocite-type FAHP, in which FeOOH and acetate components are stacked in a layer-by-layer assembly, undergoes facile initial intercalation owing to its large interlayer spacing. Consequently, the redox reaction coupled with FeOOH reduction and acetate oxidation occurs in a similar way to the biotic Fe redox reaction. During the subsequent discharge-charge cycles, carbonate produced by the redox coupling of acetate and FeOOH serves as a stable and reversible host for Na ion storage. This study establishes a novel method for enabling highly reversible conversion reactions and enhancing the electrochemical capacity using not only Na ions but Li ions through the exploitation of the interplaying redox of inorganic and organic materials in hybrid structures.

Original languageEnglish
Pages (from-to)17740-17751
Number of pages12
JournalJournal of Materials Chemistry A
Issue number34
Publication statusPublished - 2022 Aug 10

ASJC Scopus subject areas

  • Chemistry(all)
  • Renewable Energy, Sustainability and the Environment
  • Materials Science(all)


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