Affiliation:
1. Key Laboratory for Green Synthesis and Preparative Chemistry of Advanced Materials Institute of Clean Energy Chemistry College of Chemistry Liaoning University Shenyang China
2. Centre for Atomaterials and Nanomanufacturing (CAN), School of Science RMIT University Melbourne Victoria Australia
3. School of Chemistry and Chemical Engineering Hunan University of Science and Technology Xiangtan China
Abstract
AbstractThin films with two‐dimensional (2D) nanostructures possess good environmental stability, thinner thickness and large surface area, which are widely used as a promising modified electrode material in the field of energy storage, supercapacitors, electrochemical sensors and biosensors. Herein, unique bimetallic ions modified polypyrrole/graphene oxide (PPy/GO) nanosheets, including Co2+‐Zr4+/(2‐MeIm)x@PPy/GO and Co2+‐Run+/(2‐MeIm)x@PPy/GO (n = 0, 4), are prepared by using 2‐methylimidazolium (2‐MeIm) as the linkers between PPy/GO and metal ions. The obtained electrodes constructed by Co2+‐Run+/(2‐MeIm)x@PPy/GO (n = 0, 4) and Co2+‐Zr4+/(2‐MeIm)x@PPy/GO exhibit improved capacitor electrochemical properties due to the reversible redox reaction, the large specific surface area and the high theoretical specific capacitance value of the metal ions compared to the unmodified PPy/GO. Especially, the specific capacitance value of Co2+‐Run+/(2‐MeIm)x@PPy/GO (n = 0, 4) electrode reaches 321.78 F g−1 at a current density of 1 A g−1 and the capacitance retention rate is achieved to 100% in the long cycle charge/discharge test after 10 000 cycles (10 A g−1). It will provide a practical experience for the design and preparation of supercapacitors based on bimetallic ions modified PPy/GO.
Funder
National Natural Science Foundation of China
Australian Renewable Energy Agency
Scientific Research Fund of Liaoning Provincial Education Department
Liaoning Revitalization Talents Program