Effect of manganese salt type on the structure and zinc storage property of Mn2O3/Mn3O4 composites synthesized by sucrose-assisted thermal decomposition method

IF 3 4区材料科学 Q3 CHEMISTRY, PHYSICAL Solid State Ionics Pub Date : 2024-08-14 DOI:10.1016/j.ssi.2024.116653

Jinhu Li , Jinhuan Yao , Haiyan Chen , Jiqiong Jiang , Guanlong Song , Yanwei Li

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Abstract

In this work, Mn₂O₃/Mn₃O₄ composites are prepared by a facile sucrose-assisted thermal decomposition method using MnCl₂·4H₂O, Mn(CH₃COO)₂·4H₂O, and MnSO₄·H₂O as manganese sources, respectively. The results demonstrate that manganese salt type has a significant influence on the morphology and phase composition of the final Mn₂O₃/Mn₃O₄ composites. The composites prepared from MnCl₂·4H₂O or Mn(CH₃COO)₂·4H₂O possess a porous sheet-like morphology, while the Mn₂O₃/Mn₃O₄ composite prepared from MnSO₄·H₂O has a much finer nanosheet morphology. The Mn₂O₃ contents in the composites prepared from MnCl₂·4H₂O, Mn(CH₃COO)₂·4H₂O, and MnSO₄·H₂O are about 57.8%, 95.0%, and 27.0%, respectively. Due to the differences in morphology and phase composition, the Mn₂O₃/Mn₃O₄ composites prepared from MnCl₂·4H₂O and Mn(CH₃COO)₂·4H₂O exhibit better zinc storage properties than the composite prepared from MnSO₄·H₂O. Among the three samples, the Mn₂O₃/Mn₃O₄ composite prepared from Mn(CH₃COO)₂·4H₂O shows superior zinc storage capability in short-term cycling and the best rate capability; the Mn₂O₃/Mn₃O₄ composite prepared from MnCl₂·4H₂O presents the best long-term cycling performance and moderate rate capability; the Mn₂O₃/Mn₃O₄ composite prepared from MnSO₄·H₂O displays the worst zinc storage capability and rate performance. EIS and CV analysis demonstrate that the Mn₂O₃/Mn₃O₄ composites prepared from MnCl₂·4H₂O or Mn(CH₃COO)₂·4H₂O have a low charge transfer resistance and obvious pseudocapacitive behavior during the charge/discharge process. The charge/discharge mechanism of the Mn₂O₃/Mn₃O₄ composites is also explored by ex-situ XRD characterization. This work provides a reference for the simple preparation of high-performance Mn₂O₃/Mn₃O₄ composites utilizing different manganese salts.

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锰盐类型对蔗糖辅助热分解法合成的 Mn2O3/Mn3O4 复合材料的结构和储锌性能的影响

本研究以 MnCl2-4H2O、Mn(CH3COO)2-4H2O 和 MnSO4-H2O 分别作为锰源，采用简便的蔗糖辅助热分解法制备了 Mn2O3/Mn3O4 复合材料。结果表明，锰盐类型对最终 Mn2O3/Mn3O4 复合材料的形貌和相组成有显著影响。用 MnCl2-4H2O 或 Mn（CH3COO）2-4H2O 制备的复合材料具有多孔的片状形态，而用 MnSO4-H2O 制备的 Mn2O3/Mn3O4 复合材料具有更精细的纳米片状形态。由 MnCl2-4H2O、Mn(CH3COO)2-4H2O 和 MnSO4-H2O 制备的复合材料中 Mn2O3 的含量分别约为 57.8%、95.0% 和 27.0%。由于形态和相组成的不同，用 MnCl2-4H2O 和 Mn（CH3COO）2-4H2O 制备的 Mn2O3/Mn3O4 复合材料比用 MnSO4-H2O 制备的复合材料具有更好的锌储存性能。在这三种样品中，以 Mn（CH3COO）2-4H2O 为原料制备的 Mn2O3/Mn3O4 复合材料在短期循环中显示出卓越的锌储存能力和最佳的速率能力；以 MnCl2-4H2O 为原料制备的 Mn2O3/Mn3O4 复合材料显示出最佳的长期循环性能和适中的速率能力；以 MnSO4-H2O 为原料制备的 Mn2O3/Mn3O4 复合材料显示出最差的锌储存能力和速率性能。EIS 和 CV 分析表明，由 MnCl2-4H2O 或 Mn（CH3COO）2-4H2O 制备的 Mn2O3/Mn3O4 复合材料在充放电过程中具有较低的电荷转移电阻和明显的伪电容行为。此外，还通过原位 XRD 表征探索了 Mn2O3/Mn3O4 复合材料的充放电机理。这项研究为利用不同锰盐简单制备高性能 Mn2O3/Mn3O4 复合材料提供了参考。

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来源期刊

Solid State Ionics 物理-物理：凝聚态物理

CiteScore

6.10

自引率

3.10%

发文量

152

审稿时长

58 days

期刊介绍： This interdisciplinary journal is devoted to the physics, chemistry and materials science of diffusion, mass transport, and reactivity of solids. The major part of each issue is devoted to articles on: (i) physics and chemistry of defects in solids; (ii) reactions in and on solids, e.g. intercalation, corrosion, oxidation, sintering; (iii) ion transport measurements, mechanisms and theory; (iv) solid state electrochemistry; (v) ionically-electronically mixed conducting solids. Related technological applications are also included, provided their characteristics are interpreted in terms of the basic solid state properties. Review papers and relevant symposium proceedings are welcome.