A novel 3D framework loaded with MnO2 for high-performance aqueous zinc-ion battery cathode

IF 4.1 3区化学 Q1 CHEMISTRY, ANALYTICAL Journal of Electroanalytical Chemistry Pub Date : 2025-03-31 DOI:10.1016/j.jelechem.2025.119101

Haodong Ding, Yingying He, Xuelian Yu, Lijun Chen, Mingze Chen, Yongming Luo, Jiarun Li, Sichen Wei

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Abstract

The rising need for energy storage solutions has generated substantial interest in the exploration of advanced battery technologies. Due to their environmental sustainability and affordability, aqueous zinc-ion batteries (AZIBs) have attracted significant attention. This research presents a MnO₂@rGO@HCS cathode material featuring a distinctive ordered 3D hierarchical framework synthesized by the hydrothermal method. The non-template in-situ grown hollow carbon spheres (HCS) on reduced graphene oxide (rGO) create a comprehensive ordered network of channels that can serve as “highways” for electrolyte transport. MnO₂ nanoparticles are then uniformly deposited within this framework, forming numerous “service stations” that provide ample ion storage sites along the transport pathways. This architecture not only accelerates ion transport but also significantly improves ion storage capacity. Electrochemical tests reveal that the MnO₂@rGO@HCS cathode achieves exceptional performance with a specific capacity of 405 mA h·g⁻¹ at 0.2 A·g⁻¹ current density. This study offers a new approach for constructing a 3D ordered microstructure supported by HCS to efficiently load active materials as high-performance cathodes for AZIBs.

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一种用于高性能锌离子电池负极的新型MnO2三维骨架

对能源存储解决方案的需求不断增长，对探索先进电池技术产生了极大的兴趣。由于其环境可持续性和可负担性，水性锌离子电池（azib）引起了人们的广泛关注。本研究提出了一种采用水热法合成的具有独特有序三维层次结构的MnO2@rGO@HCS正极材料。非模板原位生长的空心碳球（HCS）在还原氧化石墨烯（rGO）上创建了一个全面有序的通道网络，可以作为电解质运输的“高速公路”。二氧化锰纳米颗粒均匀地沉积在这个框架内，形成许多“服务站”，在运输路径上提供充足的离子储存场所。这种结构不仅加速了离子传输，而且显著提高了离子存储容量。电化学测试表明，MnO2@rGO@HCS阴极在0.2 a·g−1电流密度下的比容量达到405 mA h·g−1，具有优异的性能。该研究为构建HCS支撑的三维有序微观结构提供了一种新的方法，可以有效地加载活性材料作为azib的高性能阴极。

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来源期刊

Journal of Electroanalytical Chemistry 化学-电化学

CiteScore

7.80

自引率

6.70%

发文量

912

审稿时长

2.4 months

期刊介绍： The Journal of Electroanalytical Chemistry is the foremost international journal devoted to the interdisciplinary subject of electrochemistry in all its aspects, theoretical as well as applied. Electrochemistry is a wide ranging area that is in a state of continuous evolution. Rather than compiling a long list of topics covered by the Journal, the editors would like to draw particular attention to the key issues of novelty, topicality and quality. Papers should present new and interesting electrochemical science in a way that is accessible to the reader. The presentation and discussion should be at a level that is consistent with the international status of the Journal. Reports describing the application of well-established techniques to problems that are essentially technical will not be accepted. Similarly, papers that report observations but fail to provide adequate interpretation will be rejected by the Editors. Papers dealing with technical electrochemistry should be submitted to other specialist journals unless the authors can show that their work provides substantially new insights into electrochemical processes.