Electrochemical performance of two-dimensional Ti3C2-Mn3O4 nanocomposites and carbonized iron cations for hybrid supercapacitor electrodes

In this work, we present a simple two-step synthesis route to develop a cost effective high performance Ti3C2Mn3O4 nanocomposite via a solvothermal process at 150 °C. The characterization of the composite material was obtained via various techniques. Electrochemical performance study of the material as a potential supercapacitor electrode demonstrated a maximum specific capacity of 128 mAh g−1 at a specific current of 1 A g−1 in a 6 M KOH aqueous electrolyte. A capacity retention of 77.7% of the initial value was recorded after over 2000 galvanostatic cycles at 10 A g−1 for the single electrode. More so, the as-prepared nanocomposite sample electrode also showed a relatively stable property with an energy efficiency of 83.5% after cycling tests. Interestingly, an assembled hybrid supercapacitor device with carbonized iron cations (C-FP) and the Ti3C2Mn3O4 composite delivered a specific capacity of 78.9 mAh g−1. The device yielded a high energy of 28.3 Wh kg−1 with an equivalent 463.4 W kg−1 power densityat 1 A g−1. A good cycling stability performance with an energy efficiency of 90.2% in addition to a 92.6% capacity retention was observed for over 10,000 cycles at specific current of 3 A g−1 over a voltage window of 1.5 V. •High performance Ti3C2Mn3O4 nanocomposite is synthesis via solvothermal process.•Characterization of the nanocomposite is obtained using various techniques.•A synergy of features is achieved by integrating Mn3O4 into Ti3C2 network.•An assembled hybrid Ti3C2Mn3O4//C-FP device yields comparable energy density.