Reduced graphene oxide modified ɛ-MnO2 nanoflowers cathode with oxygen vacancy for advanced rechargeable aqueous zinc-ion batteries

IF 5.3 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Research Bulletin Pub Date : 2025-05-08 DOI:10.1016/j.materresbull.2025.113543

Chen Wang, Hong Liu, Litao Han, Jiajia Zhang, Renqiang Liu, Fanjun Kong

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Abstract

Manganese dioxide (MnO₂) has become a great potential cathode material for aqueous zinc-ion batteries (AZIBs), owing to its advantages such as high theoretical capacity, moderate potential window, low price and abundant reserves. However, the inner poor electrical conductivity and sluggish reaction kinetics of MnO₂ can lead to the irreversible phase transition and capacity decay, limiting its further application. Herein, we developed a simple co-precipitation method to construct reduced graphene oxide modified MnO₂ nanoflowers with hexagonal structure (MnO₂/RGO). Ascribed to the synergetic effects of MnO₂ nanoflowers with high theoretical capacity and RGO with high conductivity and stability, the MnO₂/RGO composite delivers excellent zinc-ion storage performance with superior cycling stability (222.0 mAh g⁻¹ at 0.2 A g⁻¹ after 200 cycles and 72.6 mAh g⁻¹ at 2.0 A g⁻¹ after 3000 cycles), fast charge transfer and ion diffusion kinetics.

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带氧空位的还原氧化石墨烯修饰的纳米花阴极用于高级可充电水性锌离子电池

二氧化锰（MnO2）具有理论容量高、电位窗适中、价格低廉、储量丰富等优点，已成为极具潜力的水性锌离子电池正极材料。然而，MnO2内部导电性差，反应动力学缓慢，导致相变不可逆，容量衰减，限制了其进一步应用。在此，我们开发了一种简单的共沉淀法来构建具有六方结构的还原性氧化石墨烯修饰MnO2纳米花（MnO2/RGO）。由于具有高理论容量的MnO2纳米花和具有高导电性和稳定性的RGO的协同作用，MnO2/RGO复合材料具有优异的锌离子存储性能，具有优异的循环稳定性（200次循环后，0.2 A g−1时，222.0 mAh g−1,3000次循环后，2.0 A g−1时，72.6 mAh g−1），快速电荷转移和离子扩散动力学。

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来源期刊

Materials Research Bulletin 工程技术-材料科学：综合

CiteScore

9.80

自引率

5.60%

发文量

372

审稿时长

42 days

期刊介绍： Materials Research Bulletin is an international journal reporting high-impact research on processing-structure-property relationships in functional materials and nanomaterials with interesting electronic, magnetic, optical, thermal, mechanical or catalytic properties. Papers purely on thermodynamics or theoretical calculations (e.g., density functional theory) do not fall within the scope of the journal unless they also demonstrate a clear link to physical properties. Topics covered include functional materials (e.g., dielectrics, pyroelectrics, piezoelectrics, ferroelectrics, relaxors, thermoelectrics, etc.); electrochemistry and solid-state ionics (e.g., photovoltaics, batteries, sensors, and fuel cells); nanomaterials, graphene, and nanocomposites; luminescence and photocatalysis; crystal-structure and defect-structure analysis; novel electronics; non-crystalline solids; flexible electronics; protein-material interactions; and polymeric ion-exchange membranes.