Hydrothermal preparation of CuMnO2 adorned on MXene nanocomposite for energy storage devices

초록

Due to growing energy demand and global energy crisis, development of efficient electrode materials for supercapacitors (SCs) gained significant attention. Transition metal-based delafossite oxides are suitable materials for SCs application due to their low cost and high specific capacitance (Cs). However, their practical application is limited by poor cycling stability and low surface area (SA). A hydrothermal technique was used to produce a nanohybrid of CuMnO2/MXene. The synthesized material was systematically characterized using different analytical techniques, where XRD confirmed the crystalline structure of prepared nanohybrid, while BET analysis revealed an increased SA favorable for electrochemical reactions. Electrochemical results demonstrate that nanocomposite showed a Cs of 1782.83 F g(-1) at 1 A g(-1), along with excellent cycling stability and high capacitance retention after 4400th charge/discharge (GCD) cycles, E-d of 36.28 Wh kg(-1) and Pd of 191.4 W kg(-1), which are more than those of characteristics. Moreover, EIS analysis revealed a low solution resistance (R-s) of 1.06 Omega and a low charge transfer resistance (R-ct) of 0.01 Omega. The improved electrochemical behavior is mainly attributed to synergistic interaction between CuMnO2 and MXene, which promotes rapid charge transfer and increases active SA. These findings suggest that CuMnO2/MXene nanohybrid is a promising electrode material for advanced SCs applications.

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