Mn-Ni bimetallic microporous sulfide electrode materials for efficient supercapacitor conversion

IF 5.9 3区材料科学 Q2 CHEMISTRY, PHYSICAL

FlatChem Pub Date : 2025-05-01 DOI:10.1016/j.flatc.2025.100877

Yuke Zhang , Yanyue Chen , Wanxin Mai , Guixia Hao , Zhaohua Chu , Xuan Xu , Yongbo Wu , Xiaoming Lin

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Abstract

A hierarchical Ni₂S₃/MnS composite with dual transition metal synergy was developed via a MOF-derived strategy as a high-performance electrode for hybrid supercapacitors. To investigate the charge storage performance of the sulphide in detail, we studied the synergistic mechanism between the two transition metals Ni and Mn in detail. and the introduction of the Mn and Ni components significantly improved the charge storage activity of the sulphide. Specifically, Mn-MOF may partially retain the porous skeleton during vulcanisation, providing a high specific surface area, which is conducive to ion/electron transport; whereas Ni's sulphides are usually highly metallic, which can significantly enhance the conductivity of the material. The electronic interactions between Ni and Mn can modulate the overall energy band structure of the sulphide, forming heterojunction interfaces and facilitating charge separation. This ordered porous structure facilitates the unobstructed diffusion of ions, while also accommodating volume changes during cycling. In performance tests, the Ni₂S₃/MnS composites showed excellent charge storage capability. The NiMn synergy was further evidenced by outstanding cycling stability, retaining 61.7 % initial capacitance after 5000 cycles. These results demonstrate the composite's great potential for hybrid supercapacitors.

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高效超级电容器转换用锰镍双金属微孔硫化物电极材料

通过mof衍生策略，开发了具有双过渡金属协同作用的分层Ni2S3/MnS复合材料，作为混合超级电容器的高性能电极。为了详细研究硫化物的电荷存储性能，我们详细研究了两种过渡金属Ni和Mn之间的协同作用机制。Mn和Ni组分的引入显著提高了硫化物的电荷存储活性。具体来说，Mn-MOF可以在硫化过程中部分保留多孔骨架，提供高比表面积，这有利于离子/电子传输；而Ni的硫化物通常是高度金属化的，这可以显著提高材料的导电性。Ni和Mn之间的电子相互作用可以调节硫化物的整体能带结构，形成异质结界面，促进电荷分离。这种有序的多孔结构有利于离子的畅通扩散，同时也适应循环过程中的体积变化。在性能测试中，Ni2S3/MnS复合材料表现出优异的电荷存储能力。卓越的循环稳定性进一步证明了NiMn的协同作用，在5000次循环后保持61.7%的初始电容。这些结果证明了这种复合材料作为混合超级电容器的巨大潜力。

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来源期刊

FlatChem Multiple-

CiteScore

8.40

自引率

6.50%

发文量

104

审稿时长

26 days

期刊介绍： FlatChem - Chemistry of Flat Materials, a new voice in the community, publishes original and significant, cutting-edge research related to the chemistry of graphene and related 2D & layered materials. The overall aim of the journal is to combine the chemistry and applications of these materials, where the submission of communications, full papers, and concepts should contain chemistry in a materials context, which can be both experimental and/or theoretical. In addition to original research articles, FlatChem also offers reviews, minireviews, highlights and perspectives on the future of this research area with the scientific leaders in fields related to Flat Materials. Topics of interest include, but are not limited to, the following: -Design, synthesis, applications and investigation of graphene, graphene related materials and other 2D & layered materials (for example Silicene, Germanene, Phosphorene, MXenes, Boron nitride, Transition metal dichalcogenides) -Characterization of these materials using all forms of spectroscopy and microscopy techniques -Chemical modification or functionalization and dispersion of these materials, as well as interactions with other materials -Exploring the surface chemistry of these materials for applications in: Sensors or detectors in electrochemical/Lab on a Chip devices, Composite materials, Membranes, Environment technology, Catalysis for energy storage and conversion (for example fuel cells, supercapacitors, batteries, hydrogen storage), Biomedical technology (drug delivery, biosensing, bioimaging)