In this work, Fe2O3/MoS2 nanocomposites were synthesized through a hydrothermal method to enhance charge storage capability for supercapacitor applications. X ray diffraction (XRD) confirmed the crystalline phase structure of α-Fe2O3 and the presence of layered MoS2, while FTIR and XPS analyses supported the bonding environment and chemical states of Fe, Mo, S, and O in the composite. FESEM revealed that pristine Fe2O3 exhibited an average particle size of 65 nm, whereas the Fe2O3/MoS2 (IO/MS) composite showed a reduced size of 56 nm, indicating efficient suppression of particle growth by MoS2. TEM and SAED analyses confirm that the Fe2O3/MoS2 composite forms a hierarchical porous heterostructure with nanosized Fe2O3 particles integrated into layered MoS2. This architecture enhances interfacial interaction, charge transfer, and ion diffusion while providing abundant active sites, thereby offering clear structural advantages for high-performance energy applications. The charge storage characteristics of the prepared samples were examined using various electroanalytical techniques. The prepared materials store charge primarily through a pseudocapacitive mechanism. The incorporation of MoS2 nanostructures significantly enhanced electrochemical performance by estimating specific capacity of 610 C g–1 at 2 A g–1 and it is 1.43-fold higher than Fe2O3 (426 C g–1 at 2 A g–1), indicating the faster ion diffusion, and an increased electroactive surface area due to the synergistic interaction between Fe2O3 nanoparticles and MoS2 nanosheets. An asymmetric supercapacitor (ASC) was fabricated using Fe2O3/MoS2 composite as the counter electrode to the activated carbon. The device operates stably over a wide potential window of 1.4 V, exhibiting a pseudocapacitive nature of charge storage mechanism. A maximum energy density of 34 Wh k g–1 is achieved at a power density of 584 W kg–1, highlighting its potential for high-performance energy storage applications. These results confirm that constructing Fe2O3/MoS2 heterostructures is a promising strategy for developing high-performance electrode materials for energy storage applications.

Interface-Engineered Fe₂O₃/MoS₂ Nanocomposites for Supercapacitor Electrodes

期刊论文
发表日期：

2026年4月18日

查看全文

P. A. Periasamy,
J. Johnson William,
B. Saravanakumar,
N. Karthikeyan,
Sethumathavan Vadivel,
A. Shanmugapriya,
N. Regina Delcy

摘要

In this work, Fe₂O₃/MoS₂ nanocomposites were synthesized through a hydrothermal method to enhance charge storage capability for supercapacitor applications. X ray diffraction (XRD) confirmed the crystalline phase structure of α-Fe₂O₃ and the presence of layered MoS₂, while FTIR and XPS analyses supported the bonding environment and chemical states of Fe, Mo, S, and O in the composite. FESEM revealed that pristine Fe₂O₃ exhibited an average particle size of 65 nm, whereas the Fe₂O₃/MoS₂ (IO/MS) composite showed a reduced size of 56 nm, indicating efficient suppression of particle growth by MoS₂. TEM and SAED analyses confirm that the Fe₂O₃/MoS₂ composite forms a hierarchical porous heterostructure with nanosized Fe₂O₃ particles integrated into layered MoS₂. This architecture enhances interfacial interaction, charge transfer, and ion diffusion while providing abundant active sites, thereby offering clear structural advantages for high-performance energy applications. The charge storage characteristics of the prepared samples were examined using various electroanalytical techniques. The prepared materials store charge primarily through a pseudocapacitive mechanism. The incorporation of MoS₂ nanostructures significantly enhanced electrochemical performance by estimating specific capacity of 610 C g^–1 at 2 A g^–1 and it is 1.43-fold higher than Fe₂O₃ (426 C g^–1 at 2 A g^–1), indicating the faster ion diffusion, and an increased electroactive surface area due to the synergistic interaction between Fe₂O₃ nanoparticles and MoS₂ nanosheets. An asymmetric supercapacitor (ASC) was fabricated using Fe₂O₃/MoS₂ composite as the counter electrode to the activated carbon. The device operates stably over a wide potential window of 1.4 V, exhibiting a pseudocapacitive nature of charge storage mechanism. A maximum energy density of 34 Wh k g^–1 is achieved at a power density of 584 W kg^–1, highlighting its potential for high-performance energy storage applications. These results confirm that constructing Fe₂O₃/MoS₂ heterostructures is a promising strategy for developing high-performance electrode materials for energy storage applications.

Interface-Engineered Fe2O3/MoS2 Nanocomposites for Supercapacitor Electrodes

摘要

Interface-Engineered Fe₂O₃/MoS₂ Nanocomposites for Supercapacitor Electrodes