Preparation of polypyrrole modified molybdenum trioxide nanorod and their applications in supercapacitors

ABSTRACT

Herein, we present the synthesis of PPy@MoO₃ nanocomposites through a novel situ polymerisation growth. The introduction of polypyrrole (PPy) not only greatly improved the electrical conductivity of the material but also significantly improved the electrochemical activity, thus promoting the storage of energy reaction. The results exhibit that the electrode material has a very high specific capacitance (453.75 F/g at 1 A/g) and an excellent cycle life (84.3% of the initial specific capacitance after 5000 cycles). Notably, based on the rise of high-safety all-solid supercapacitors, it has great potential in the portable/wearable field. The PPy@MoO₃//AC all-solid supercapacitors have the power density of 400 W/kg at an energy density of 20.3 Wh/kg. The distinguished performances stem from the synergetic merits of the morphology, structure, and mechanism of PPy@MoO₃. PPy@MoO₃ is expected to be a promising anode material and provide a theoretical basis for the scalable research and applications of MoO₃-based anode materials for all-solid supercapacitors.

KEYWORDS:

• Polypyrrole
• molybdenum trioxide
• supercapacitors
• nanorod

Disclosure statement

No potential conflict of interest was reported by the author(s).

Additional information

Funding

The authors received joint support from the Hebei “ 333 talent project “ [No. A202101024].