Enhanced electrochemical properties of MnFe2O4/reduced graphene oxide nanocomposite with a potential for supercapacitor application

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

Materials Research Bulletin Pub Date : 2024-09-10 DOI:10.1016/j.materresbull.2024.113093

Bidisha Mandal , Krishnendu Ghorui , Samik Saha , Sachindranath Das , Ratan Sarkar , Bharati Tudu

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Abstract

A single-step solvothermal method has been employed to synthesize MnFe₂O₄ composite nanoparticles where graphene sheets were incorporated into spherical MnFe₂O₄ nanoparticles of size ∼57 nm. The synthesized MnFe₂O₄/reduced graphene oxide (rGO) composite exhibits enhanced electrochemical properties due to its improved porosity, surface area, and conductivity. FTIR, Raman, and XPS studies confirmed the effective reduction of GO and the successful formation of MnFe₂O₄/rGO composite. When employed as an electrochemical cell electrode, the MnFe₂O₄/rGO composite showed an enhanced specific capacitance of 253 F g⁻¹, as opposed to 133 F g⁻¹ for the bare nanoparticles. The composite attains significantly improved energy density of 76.06 Wh kg⁻¹ and power density of 7.49 kW kg⁻¹ at current density of 10 A g⁻¹. The unification of 2D graphene and MnFe₂O₄ nanoparticles yields enhanced electrochemical performance and an outstanding 96 % cyclic stability (after 5000 cycles), which offers a viable approach for developing better supercapacitor electrode materials in the future.

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增强 MnFe2O4/还原氧化石墨烯纳米复合材料的电化学性能，使其有望应用于超级电容器

采用单步溶热法合成了 MnFe2O4 复合纳米粒子，其中石墨烯片被加入到尺寸为 ∼57 nm 的球形 MnFe2O4 纳米粒子中。合成的 MnFe2O4/还原氧化石墨烯（rGO）复合材料由于孔隙率、比表面积和电导率的提高而显示出更强的电化学性能。傅立叶变换红外光谱、拉曼光谱和 XPS 研究证实了 GO 的有效还原以及 MnFe2O4/rGO 复合材料的成功形成。在用作电化学电池电极时，MnFe2O4/rGO 复合材料的比电容提高到 253 F g-1，而裸纳米粒子的比电容为 133 F g-1。在电流密度为 10 A g-1 时，该复合材料的能量密度和功率密度分别达到了 76.06 Wh kg-1 和 7.49 kW kg-1。二维石墨烯和 MnFe2O4 纳米粒子的结合提高了电化学性能，并具有 96% 的出色循环稳定性（5000 次循环后），这为将来开发更好的超级电容器电极材料提供了一种可行的方法。

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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.