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An Advanced NiCoFeO/Polyaniline Composite for High‐Performance Supercapacitors
Author(s) -
Hu Xi,
Liu Lu,
Zeng HongYan,
Xu Sheng,
Cao Xi,
Cao XiaoJu
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.201801905
Subject(s) - supercapacitor , polyaniline , materials science , composite number , chemical engineering , graphene , electrochemistry , electrode , calcination , polymerization , composite material , nanotechnology , chemistry , polymer , catalysis , organic chemistry , engineering
To reduce the charge‐transfer resistance of supercapacitors and achieve faster reversible redox reactions, ternary Ni‐Co‐Fe layered double hydroxide was prepared by using the urea method and then calcined to give NiCoFe oxide (NiCoFeO). To enhance conductivity, a polyaniline (PANI) conductive layer was assembled on the surface of the NiCoFeO particles by in situ oxidative polymerization of aniline monomers. The as‐prepared NiCoFeO/PANI composite was successful employed as a supercapacitor electrode. It was found that the NiCoFeO/PANI composite displayed good cycling stability, with a capacity loss of only 29.54 % after 5000 cycles. Furthermore, the NiCoFeO/PANI composite also exhibited excellent supercapacitor performance, with a high specific capacity of 843 F g −1 at a current density of 2 A g −1 , whereas NiCoFeO showed a specific capacity of only 478 F g −1 . This result was attributed to the synergistic effect between NiCoFeO and PANI. The facile synthesis strategy and excellent electrochemical performance suggest that NiCoFeO/PANI is a promising economical electrode material for applications in supercapacitors.