MXene‐Derived TiO2/Starbon Nanocomposite as a Remarkable Electrode Material for Coin‐Cell Symmetric Supercapacitor

Author:

Sutar Sanjay D.1ORCID,Patil Indrajit2,Parse Haridas3,Mukherjee Prateekshita1,Swami Anita1ORCID

Affiliation:

1. Department of Chemistry SRM Institute of Science and Technology Kattankulathur Chennai 603203 India

2. Institute for Technical Chemistry and Environmental Chemistry (ITUC) and Center for Energy and Environmental Chemistry Jena (CEEC Jena) Friedrich‐Schiller‐University Jena Philosophenweg 7a 07743 Jena Germany

3. Department of Materials Science and Engineering Tel Aviv University Tel Aviv 69978 Israel

Abstract

AbstractIn this study, the synthesis of a MXene (Ti3C2Tx)‐derived TiO2/starbon (M‐TiO2/Starbon‐800 °C) nanocomposite using a facile calcination method is explored. High‐temperature exposure transforms layered Ti3C2Tx into rod‐like TiO2 and starbon into amorphous carbon. The resulting M‐TiO2/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 (Csp) of 1352 Fg⁻¹ at 1 Ag⁻¹, while retaining more than 99% of its Csp after 50 000 charge/discharge cycles. Furthermore, when incorporated into a two‐electrode symmetric coin cell, it demonstrates a Csp of 115 Fg⁻¹ along with exceptional long cycle life. Moreover, the device shows an energy density (ED) of 51 Whkg−1 and a power density (PD) of 7912 Wkg−1 at 5 Ag−1. 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‐TiO2 nanorods and starbon, which facilitates efficient ion penetration.

Funder

SRM Institute of Science and Technology

Ministry of New and Renewable Energy India

Publisher

Wiley

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