A facile method to improve the high rate capability of Co3O4 nanowire array electrodes

By Hua Cheng, Zhou-Guang Lu, Jian-qiu Deng, C. Chung, Kaili Zhang, Y. Li. 2010

166 citations recorded by the source corpus.

The capability of fast charge and fast discharge is highly desirable for the electrode materials used in supercapacitors and lithium ion batteries. In this article, we report a simple strategy to considerably improve the high rate capability of Co3O4 nanowire array electrodes by uniformly loading Ag nanoparticles onto the surfaces of the Co3O4 nanowires via the silver-mirror reaction. The highly electrically conductive silver nanoparticles function as a network for the facile transport of electrons between the current collectors (Ti substrates) and the Co3O4 active materials. High capacity as well as remarkable rate capability has been achieved through this simple approach. Such novel Co3O4-Ag composite nanowire array electrodes have great potential for practical applications in pseudo-type supercapacitors as well as in lithium ion batteries.

Subfields: Electrical and Electronic Engineering, Electronic, Optical and Magnetic Materials

View Paper: https://www.semanticscholar.org/paper/da686ecf9b28ad77d487ce3909c86553fdbdf8bd

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Citations in the corpus

Graphene-nickel cobaltite nanocomposite asymmetrical supercapacitor with commercial level mass loading (2012, background): “[18] Cheng, H.”
Hierarchical Co3O4@Ni-Co-O supercapacitor electrodes with ultrahigh specific capacitance per area (2012, background): “The uniform and slim tertiary Ni–Co–O nanorods are only ~10 nm in diameter, which exposed all of the material to the electrochemically active surface layer and ensured high utilization efficiency [32, 34, 36, 37, 42, 43].”
Stable ultrahigh specific capacitance of NiO nanorod arrays (2011, background): “Transition metal oxides, such as ruthenium oxide [8], manganese oxide [9], cobalt oxide [ 10 ], and nickel oxide [11–17], which have multiple oxidation states that enable rich redox reactions for pseudocapacitance generation, have been shown to be superior to carbon-based traditional electrical doub”
Evaluating the performance of nanostructured materials as lithium-ion battery electrodes (2013, background): “Due to the poor electronic conductivity of Co3O4, various attempts have been made to improve the stable capacities and rate performance of Co3O4 anodes [199], including the addition of highly conducting additives such as graphene [199–203] and silver nanoparticles [204].”