Controllable Intercalated Polyaniline Nanofibers Highly Enhancing the Utilization of Delaminated RuO₂ Nanosheets for High‐Performance Hybrid Supercapacitors

Abstract

Ruthenium oxide (RuO2) and polyaniline (PANI) are attracting extensive attention as electrode materials due to their remarkable pseudocapacitance. However, RuO2 suffers from low utilization and PANI sustains poor stability. Herein, both defects were optimized by designing intercalated‐structure PANI/RuO2 composites, which were fabricated for the first time by controllable chemical polymerization of aniline on the delaminated RuO2 nanosheets. Intercalated PANI nanofibers not only highly prevent the RuO2 nanosheets from their reassembling as well as increase the interlayer spacing among RuO2 nanosheets but also alleviate the swelling/shrinking of PANI during charge‐discharge progress. In comparison to the pristine RuO2 nanosheets, the obtained intercalated structure is beneficial for creating channels for better ion transfer and electron transport, which leads to a high‐efficiency utilization of RuO2 nanosheets. The optimized PANI/RuO2‐38 electrode with a RuO2 content of 61.7 wt% shows the highest utilization of 72.1 % of RuO2, resulting in the highest specific capacity of 816 F g−1. The asymmetric supercapacitor PANI/RuO2//AC offers a high energy density of 25.7 Wh kg−1 at 375 kW kg−1, further indicating a good potential as energy‐storage device.

Design, Synthesis, Crystal Structure, and Thermal Studies of Ni0.779SbF3(SO4): A New Electrode Material for Electrochemical Supercapacitors

“…The efficiency of these supercapacitors in energy storage is directly related to the electrochemical performance of the electrode. The most commonly known electrode materials are transition metal oxides, − carbon materials, − conducting polymers, , and transition metal sulfides. , The enhanced capacitive performance of the supercapacitors depends on the choice of electrode materials and their fabrication. They must provide high thermal stability, corrosion resistance, high electrical conductivity, appropriate chemical stability, and suitable wettability.…”