(328f) Sol-Gel Synthesis of Doped (Mn, Ti)-Oxides for Asymmetric Supercapacitors

Perovskite (ABX₃) materials have received significant attention for supercapacitors due to their ability to achieve high energy storage capacity without the need for high specific surface area (SSA). Although many methods can be implemented to produce perovskites, sol-gel technique has emerged as one of the most prominent methods with many advantages such as better control of purity, particle size and homogeneity. Recently, our group reported the sol-gel synthesis of (Mn, Ti)-oxides and it’s use as electrode material for asymmetric supercapacitor (ASC). In this study, precursors of Sr, Cu, and Ni were mixed at different weight ratio with Mn and Ti precursors in ethanol and sonicated to achieve the dispersion. Gelation was achieved with the addition of deionized (DI) water, which was catalyzed with HCl. The gel was then aged, calcined at 500-1000°C to achieve desired phase formation. Doped (Mn, Ti)-oxide powder was characterized by Brunauer-Emmett-Teller (BET) surface area analyzer, powdered X-ray diffraction (XRD) and X-ray fluorescence (XRF). ASC were fabricated using doped (Mn, Ti)-oxides and HTL-derived porous carbon (POC) from corn stover feedstock. The POC was characterized by Brunauer-Emmett-Teller (BET) surface area analyzer, Fourier transform infrared (FTIR) spectroscopy, and scanning electron microscopy (SEM). The performance of ASCs was measured by cyclic voltammetry to determine their specific capacitance and cyclic stability. Sol-gel synthesis of doped (Mn,Ti)-oxides, fabrication of ASC and electrochemical performance of ASCs will be presented.