Bioinspired redox-coupled conversion reaction in FeOOH-acetate hybrid nanoplatelets for Na ion battery,Journal of Materials Chemistry A

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Bioinspired redox-coupled conversion reaction in FeOOH-acetate hybrid nanoplatelets for Na ion battery
Journal of Materials Chemistry A ( IF 10.7 ) Pub Date : 2022-08-10 , DOI: 10.1039/d2ta04990b
Bum Chul Park _{1,

2} , Jiung Cho ₃ , Jiliang Zhang _{1,

2} , Mawuse Amedzo-Adore ₄ , Dae Beom Lee _{1,

2} , Sung-Chul Kim ₅ , Jong Seong Bae ₆ , Young Rang Uhm ₇ , Sang-Ok Kim ₈ , Jehyoung Koo ₃ , Yong-Mook Kang _{1,

2,

9} , Young Keun Kim _{1,

2}

Affiliation

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.

中文翻译：

用于钠离子电池的 FeOOH-乙酸盐混合纳米片中的仿生氧化还原耦合转化反应

对可充电电池的巨大兴趣导致需求迅速增加和原材料价格飙升。地球上含量丰富的羟基氧化铁（FeOOH）是钠离子可充电电池（SIBs）负极材料的候选材料。然而，FeOOH 的应用受到许多技术限制的阻碍，这些限制主要来自转化反应的不可逆性。在这里，我们从 FeOOH-乙酸盐杂化纳米片 (FAHPs) 操纵生物 Fe 氧化还原，以使由此产生的与 Na 离子的转化反应高度可逆。扩展的纤铁矿型 FAHP，其中 FeOOH 和醋酸盐组分以逐层组件的形式堆叠，由于其大的层间距，经历了容易的初始插层。最后，与 FeOOH 还原和乙酸盐氧化相结合的氧化还原反应以与生物 Fe 氧化还原反应相似的方式发生。在随后的放电-充电循环中，由乙酸盐和 FeOOH 的氧化还原偶联产生的碳酸盐作为钠离子储存的稳定和可逆主体。本研究建立了一种新方法，通过利用混合结构中无机和有机材料的相互作用氧化还原，不仅可以使用 Na 离子，还可以使用 Li 离子来实现高度可逆的转化反应并提高电化学容量。

更新日期：2022-08-10

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