Enhancing interfacial charge density of CuCo2O4 by coupling Mo2TiC2Tx MXene for high-performance hybrid supercapacitors
Journal
JOURNAL OF ENERGY STORAGE
Date Issued
2026
Author(s)
Tharun, P. V.
Saha, Shalakha
Nitesh, P.
Sengottaiyan, C.
Neppolian, B.
Seetharaman, Amreetha
Thirumurugan, Arun
Kandasamy, Manikandan
Kavinkumar, T.
Abstract
Copper cobaltite (CuCo2O4), a mixed-valence bimetal oxide holds great promise as an electrode material for energy storage sector;" however, the bottleneck is poor electron migration, slow reaction kinetics, and relatively lower specific capacity. Hybridization with highly conductive and mechanically robust materials has proven to be an effective approach to overcome these limitations. Herein, we report the preparation of CuCo2O4 (CCO) hybridized with Mo2TiC2TX-MXene (MX) using hydrothermal synthesis. The hybrid material was systematically analysed for its structural and compositional characteristics using X-ray diffraction, Raman spectroscopy, scanning electron microscopy, transmission electron microscopy, and X-ray photoelectron spectroscopy. Electrochemical characterization revealed that the CuCo2O4/Mo2TiC2TX-MXene (CCMX) hybrid electrode possesses a specific capacitance of 603.3 F g-1 at 3 A g-1. Additionally, the hybrid supercapacitor based on the CCMX hybrid electrode exhibits a maximum energy density of 29.4 W h kg-1 at a power density of 699.6 W kg-1. Density functional theory reveals enhanced conductivity in CCMX compared to CCO alone. Partial density of states analysis further explores the possible charge transfer between CCO and MX. The results highlight the viability of the CCMX hybrid electrode for real-world energy storage applications."


