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Toward the Theoretical Capacitance of RuO 2 Reinforced by Highly Conductive Nanoporous Gold
Author(s) -
Chen L. Y.,
Hou Y.,
Kang J. L.,
Hirata A.,
Fujita T.,
Chen M. W.
Publication year - 2013
Publication title -
advanced energy materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.08
H-Index - 220
eISSN - 1614-6840
pISSN - 1614-6832
DOI - 10.1002/aenm.201300024
Subject(s) - nanoporous , materials science , capacitance , ruthenium oxide , electrical conductor , capacitive sensing , electrode , ionic bonding , oxide , proton , nanotechnology , optoelectronics , ion , chemical engineering , electrochemistry , composite material , electrical engineering , chemistry , metallurgy , organic chemistry , physics , engineering , quantum mechanics
The experimental specific capacitance of ruthenium oxide (RuO 2 ) is usually much smaller than the theoretical value due to low electron–proton transport and high rate dependence. Highly conductive nanoporous gold (NPG) can dramatically improve the capacitive performance of RuO 2 when RuO 2 is electroplated into NPG. The RuO 2 @NPG electrodes provide fast ionic conduction and excellent electron–proton transport for low rate dependence and high charge storage of around 1500 F g −1 , close to the theoretical value of RuO 2 .