• Mukherjee, Prateekshita
• Parse, Haridas
• Patil, Indrajit
• Swami, Anita
• Sutar, Sanjay

Abstract

<jats:title>Abstract</jats:title><jats:p>In this study, the synthesis of a MXene (Ti<jats:sub>3</jats:sub>C<jats:sub>2</jats:sub>T<jats:sub>x</jats:sub>)‐derived TiO<jats:sub>2</jats:sub>/starbon (M‐TiO<jats:sub>2</jats:sub>/Starbon‐800 °C) nanocomposite using a facile calcination method is explored. High‐temperature exposure transforms layered Ti<jats:sub>3</jats:sub>C<jats:sub>2</jats:sub>T<jats:sub>x</jats:sub> into rod‐like TiO<jats:sub>2</jats:sub> and starbon into amorphous carbon. The resulting M‐TiO<jats:sub>2</jats:sub>/Starbon‐800 °C nanocomposite exhibits a significantly larger surface area and pore volume compared to its individual components, leading to superior electrochemical performance. In a three‐electrode configuration, the nanocomposite achieved a specific capacitance (C<jats:sub>sp</jats:sub>) of 1352 Fg⁻¹ at 1 Ag⁻¹, while retaining more than 99% of its C<jats:sub>sp</jats:sub> after 50 000 charge/discharge cycles. Furthermore, when incorporated into a two‐electrode symmetric coin cell, it demonstrates a C<jats:sub>sp</jats:sub> of 115 Fg⁻¹ along with exceptional long cycle life. Moreover, the device shows an energy density (ED) of 51 Whkg<jats:sup>−1</jats:sup> and a power density (PD) of 7912 Wkg<jats:sup>−1</jats:sup> at 5 Ag<jats:sup>−1</jats:sup>. The enhanced charge storage is attributed to the formation of a porous structure with a high specific surface area resulting from the interaction between M‐TiO<jats:sub>2</jats:sub> nanorods and starbon, which facilitates efficient ion penetration.</jats:p>

Topics

• porous
• nanocomposite
• density
• impedance spectroscopy
• pore
• surface
• amorphous
• Carbon
• energy density
• layered