Unveiling high specific energy supercapacitor from layer-by-layer assembled polypyrrole/graphene oxide with polypyrrole/manganese oxide electrode material

• Main Authors: Kulandaivalu, Shalini, Suhaimi, Nadhrah, Sulaiman, Yusran
• Format: Article
• Language: English
• Published: Nature Publishing Group 2019
• Online Access: http://psasir.upm.edu.my/id/eprint/82678/1/Unveiling%20high%20specifc%20energy%20.pdf; http://psasir.upm.edu.my/id/eprint/82678/; https://www.nature.com/articles/s41598-019-41203-3
• Institution: Universiti Putra Malaysia

A novel layer-by-layer (LBL) based electrode material for supercapacitor consists of polypyrrole/graphene oxide and polypyrrole/manganese oxide (PPy/GO|PPy/MnO2) has prepared by electrochemical deposition. The formation of LBL assembled nanocomposite is confirmed by Fourier transform infrared spectroscopy, Raman spectroscopy and X-ray diffraction. The field emission scanning electron microscopy images clearly showed that PPy/MnO2 was uniformly coated on PPy/GO. The PPy/GO|PPy/MnO2 symmetrical supercapacitor has revealed outstanding supercapacitive performance with a high specific capacitance of 786.6 F/g, an exceptionally high specific energy of 52.3 Wh/kg at a specific power of 1392.9 W/kg and preserve a good cycling stability over 1000 cycles. It is certain that PPy/GO|PPy/MnO2 has an extraordinary perspective as an electrode for future supercapacitor developments. This finding contributes to a significant impact on the evolution of electrochemical supercapacitor.