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Superior Supercapacitor Properties of Composite Powders with Amorphous NiO Nanoclusters Distributed Uniformly in an Amorphous Carbon Matrix
Author(s) -
Choi Seung Ho,
Kang Yun Chan,
Choi Yun Ju,
Kim Yang Soo
Publication year - 2014
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.201402218
Subject(s) - materials science , nanoclusters , amorphous solid , non blocking i/o , amorphous carbon , composite number , supercapacitor , chemical engineering , nickel oxide , nickel , carbon fibers , electrochemistry , nanotechnology , composite material , metallurgy , chemistry , organic chemistry , electrode , engineering , catalysis
Amorphous nickel oxide–carbon composite powders have been prepared using a facile spray‐drying process. The nickel nitrate–citrate hydrate precursor powders were transformed into an amorphous NiO–carbon composite powder through a post‐treatment at 250 °C for 1 h. The excellent supercapacitor performance of the amorphous NiO–carbon composite powder can be ascribed to the unique electrochemical behavior of the ultrafine amorphous NiO nanoclusters.