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Preparation of a NiAl‐Oxide@Polypyrrole Composite for High‐Performance Supercapacitors
Author(s) -
Zou KaiMin,
Zeng HongYan,
Cao XiaoJu,
Yuan Jian,
Claude Alain Gohi Bi Foua,
Xu Sheng,
Li HaoBo,
Long YiWen
Publication year - 2019
Publication title -
chemistry – an asian journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.18
H-Index - 106
eISSN - 1861-471X
pISSN - 1861-4728
DOI - 10.1002/asia.201901299
Subject(s) - polypyrrole , materials science , supercapacitor , electrochemistry , chemical engineering , capacitance , composite number , polymerization , electrolyte , electrode , composite material , chemistry , polymer , engineering
A core‐shell NiAlO@polypyrrole composite (NiAlO@PPy) with a 3D “sand rose”‐like morphology was prepared via a facile in situ oxidative polymerization of pyrrole monomer, where the role of PPy coating thickness was investigated for high‐performance supercapacitors. Microstructure analyses indicated that the PPy was successfully coated onto the NiAlO surface to form a core‐shell structure. The NiAlO@PPy exhibited a better electrochemical performance than pure NiAlO, and the moderate thickness of the PPy shell layer was beneficial for expediting the electron transfer in the redox reaction. It was found that the NiAlO@PPy 5 prepared at 5.0 mL L −1 addition amount of pyrrole monomer demonstrated the best electrochemical performance with a high specific capacitance of 883.2 F g −1 at a current density of 1 A g −1 and excellent capacitance retention of 91.82 % of its initial capacitance after 1000 cycles at 3 A g −1 . The outstanding electrochemical performance of NiAlO@PPy 5 were due to the synergistic effect of NiAlO and PPy, where the uniform network‐like PPy shell with the optimal thickness made electrolyte ions more easily accessible for faradic reactions. This work provided a simple approach for designing organic–inorganic core‐shell materials as high‐performance electrode materials for electrochemical supercapacitors.