Construction of a homologous bimetallic oxide Bi2Fe4O9@Bi25FeO40 heterostructure to boost supercapacitor performance

IF 3.5 3区化学 Q2 CHEMISTRY, INORGANIC & NUCLEAR

Dalton Transactions Pub Date : 2024-10-21 DOI:10.1039/d4dt02585g

Bingjie Cheng, Xiaoqiang Li, Ruqu Han, Jun Xiang, Yamei Zhang

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Abstract

Herein, a Bi₂Fe₄O₉@Bi₂₅FeO₄₀ heterostructure with a high specific surface area of 30.07 m² g⁻¹ and abundant heterogeneous interfaces was successfully fabricated and applied to supercapacitors for the first time. The Bi₂Fe₄O₉@Bi₂₅FeO₄₀ electrode exhibits a high specific capacity (550.8 F g⁻¹ at 1.0 A g⁻¹) and good cycling stability (75% capacitance retention and 92.3% coulombic efficiency after 3000 cycles at 5.0 A g⁻¹), significantly outperforming the pure Bi₂Fe₄O₉ or Bi₂₅FeO₄₀ electrode. This work proposes an effective interfacial engineering strategy to enhance supercapacitor performance.

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构建同源双金属氧化物 Bi2Fe4O9@Bi25FeO40 异质结构以提高超级电容器性能

本文首次成功制备了具有 30.07 m2 g-1 高比表面积和丰富异质界面的 Bi2Fe4O9@Bi25FeO40 异质结构，并将其应用于超级电容器。Bi2Fe4O9@Bi25FeO40 电极具有较高的比容量（1.0 A g-1 时为 550.8 F g-1）和良好的循环稳定性（5.0 A g-1 时循环 3000 次后电容保持率为 75%，库仑效率为 92.3%），明显优于纯 Bi2Fe4O9 或 Bi25FeO40 电极。这项研究提出了一种有效的界面工程策略来提高超级电容器的性能。

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来源期刊

Dalton Transactions 化学-无机化学与核化学

CiteScore

6.60

自引率

7.50%

发文量

1832

审稿时长

1.5 months

期刊介绍： Dalton Transactions is a journal for all areas of inorganic chemistry, which encompasses the organometallic, bioinorganic and materials chemistry of the elements, with applications including synthesis, catalysis, energy conversion/storage, electrical devices and medicine. Dalton Transactions welcomes high-quality, original submissions in all of these areas and more, where the advancement of knowledge in inorganic chemistry is significant.