Interface and energy band manipulation of Bi2O3-Bi2S3 electrode enabling advanced magnesium-ion storage

IF 15.8 1区 材料科学 Q1 METALLURGY & METALLURGICAL ENGINEERING
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引用次数: 0

Abstract

Rechargeable magnesium-ion (Mg-ion) batteries have attracted wide attention for energy storage. However, magnesium anode is still limited by the irreversible Mg plating/stripping procedure. Herein, a well-designed binary Bi2O3-Bi2S3 (BO-BS) heterostructure is fulfilled by virtue of the cooperative interface and energy band engineering targeted fast Mg-ion storage. The built-in electronic field resulting from the asymmetrical electron distribution at the interface of electron-rich S center at Bi2S3 side and electron-poor O center at Bi2O3 side effectively accelerates the electrochemical reaction kinetics in the Mg-ion battery system. Moreover, the as-designed heterogenous interface also benefits to maintaining the electrode integrity. With these advantages, the BO-BS electrode displays a remarkable capacity of 150.36 mAh g−1 at 0.67 A g–1 and a superior cycling stability. This investigation would offer novel insights into the rational design of functional heterogenous electrode materials targeted the fast reaction kinetics for energy storage systems.
Bi2O3-Bi2S3电极的界面和能带操作实现先进的镁离子存储
可充电镁离子(Mg-ion)电池在储能方面引起了广泛关注。然而,镁阳极仍然受限于不可逆的镁电镀/剥离过程。在此,我们通过合作界面和能带工程实现了一种精心设计的二元 Bi2O3-Bi2S3(BO-BS)异质结构,其目标是快速储存镁离子。在 Bi2S3 边富含电子的 S 中心和 Bi2O3 边贫乏电子的 O 中心的界面上,电子分布不对称所产生的内置电子场有效地加速了镁离子电池体系中的电化学反应动力学。此外,设计的异质界面还有利于保持电极的完整性。凭借这些优势,BO-BS 电极在 0.67 A g-1 的条件下显示出 150.36 mAh g-1 的出色容量和卓越的循环稳定性。这项研究将为针对储能系统的快速反应动力学合理设计功能性异质电极材料提供新的见解。
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来源期刊
Journal of Magnesium and Alloys
Journal of Magnesium and Alloys Engineering-Mechanics of Materials
CiteScore
20.20
自引率
14.80%
发文量
52
审稿时长
59 days
期刊介绍: The Journal of Magnesium and Alloys serves as a global platform for both theoretical and experimental studies in magnesium science and engineering. It welcomes submissions investigating various scientific and engineering factors impacting the metallurgy, processing, microstructure, properties, and applications of magnesium and alloys. The journal covers all aspects of magnesium and alloy research, including raw materials, alloy casting, extrusion and deformation, corrosion and surface treatment, joining and machining, simulation and modeling, microstructure evolution and mechanical properties, new alloy development, magnesium-based composites, bio-materials and energy materials, applications, and recycling.
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