Investigating the Influence of Reflux Condensation Reaction Temperature on the Growth of FeCo 2 O 4 Thin Film for Flexible Supercapacitor

• Published in: ChemistrySelect (Weinheim) 2021-02, Vol.6 (8), p.1838-1844
• Main Authors: Kamble, Gokul, Kashale, Anil, Rasal, Akash, Dengale, Suraj, Kolekar, Sanjay, Chang, Jia Yaw, Han, Sung‐Hwan, Ghule, Anil
• Format: Article
• Language: English
• ISSN: 2365-6549; 2365-6549
• DOI: 10.1002/slct.202004544

Metal oxides are at the forefront for supercapacitors (SCs) applications considering their unique properties like rapid charge transport and ability to provide more active sites. In this respect, FeCo 2 O 4 nanostructures with varying morphology are designed by reaction temperature variations (80, 100, 120, and 140 °C) in facile reflux condensation synthesis. These different structures are grown onto the flexible stainless‐steel mesh (FSSM) and investigated as an electrode in SCs. FeCo 2 O 4 prepared at 120 °C shows good electrochemical performance and offers 106.85 m 2 /g specific surface area, 0.1531 cc/g pore volume, and demonstrate hierarchical mesoporous construction. FeCo 2 O 4 nanoflakes demonstrate 260 F g −1 specific capacitance at 1 mA cm −2 and 96.16 % retention of capacitance (over 1000 cycles) supporting considerable cycle stability. The asymmetric supercapacitor (ASC) device demonstrates 15.27 Wh kg −1 energy density and promising charge‐discharge stability (80 % retention up to 2000 cycles).