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Effect of cation substitution on the pseudocapacitive performance of spinel cobaltite MCo 2 O 4 (M = Mn, Ni, Cu, and Co)
Liu S.2; Ni D.3; Li H.-F.1; Hui K.N.1; Ouyang C.-Y.3; Jun S.C.2
2018
Source PublicationJournal of Materials Chemistry A
ISSN20507496 20507488
Volume6Issue:23Pages:10674-10685
AbstractCation substitution is a promising strategy for modulating the structural properties and optimizing the electrochemical performance of spinel cobalt oxide (Co O ); however, the underlying mechanism of this action induced by different cation substitutions has not yet been clearly addressed. Herein, a systematic investigation is performed to elucidate the effect of cation substitution on the pseudocapacitive performance of spinel cobaltite (MCo O ; M = Mn, Ni, Cu, and Co) mesoporous nanowires grown on nickel foam (NF). Theoretical and experimental analyses reveal that the substitution of Co by transition metals (i.e., Mn, Ni, and Cu) in the lattice of Co O can simultaneously improve charge transfer and ion diffusion, thereby exhibiting enhanced electrochemical properties. Herein, as a representative example, MnCo O achieves a high specific capacitance of 2146 F g at a current density of 1 A g , while 92.1% of its initial capacitance is retained after 5000 cycles. An asymmetric supercapacitor with MnCo O as the positive material and activated carbon (AC) as the negative material delivers a high energy density of 56.1 W h kg at a power density of 800 W kg , and a favorable energy density of 29.3 W h kg at a power density as high as 8000 W kg .
DOI10.1039/c8ta00540k
URLView the original
Language英語
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Document TypeJournal article
CollectionUniversity of Macau
Affiliation1.Universidade de Macau
2.Yonsei University
3.Jiangxi Normal University
Recommended Citation
GB/T 7714
Liu S.,Ni D.,Li H.-F.,et al. Effect of cation substitution on the pseudocapacitive performance of spinel cobaltite MCo 2 O 4 (M = Mn, Ni, Cu, and Co)[J]. Journal of Materials Chemistry A,2018,6(23):10674-10685.
APA Liu S.,Ni D.,Li H.-F.,Hui K.N.,Ouyang C.-Y.,&Jun S.C..(2018).Effect of cation substitution on the pseudocapacitive performance of spinel cobaltite MCo 2 O 4 (M = Mn, Ni, Cu, and Co).Journal of Materials Chemistry A,6(23),10674-10685.
MLA Liu S.,et al."Effect of cation substitution on the pseudocapacitive performance of spinel cobaltite MCo 2 O 4 (M = Mn, Ni, Cu, and Co)".Journal of Materials Chemistry A 6.23(2018):10674-10685.
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