Synthesis, characterization, and electrochemical properties of self-assembled leaf-like CuO nanostructures

Dar, Mushtaq Ahmad; Nam, Sang Hoon; Kim, Youn S.; Kim, Won

doi:10.1007/s10008-010-1022-z

Cited by 89 publications

(41 citation statements)

References 48 publications

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“…The presence of shakeup satellite features for Cu 2p rules out the possibility of Cu 2 O phase presence. The gap between Cu 2p 1/2 and Cu 2p 3/2 is about 20 eV, which is in agreement with the standard CuO spectrum [36,37].…”

Section: Resultssupporting

confidence: 68%

Fabrication of wheat grain textured TiO2/CuO composite nanofibers for enhanced solar H2 generation and degradation performance

2015

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Section: Resultssupporting

confidence: 68%

Fabrication of wheat grain textured TiO2/CuO composite nanofibers for enhanced solar H2 generation and degradation performance

2015

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“…The Raman shifts around 297, 345, and 629 cm −1 due to the CuO phase, which is not detected in the samples prepared by utilizing water vapor, are clearly observed along with the peaks due to the Cu 2 O phase as shown in Fig. 5(a) [31]. This is also consistent with the results of XRD and XPS analysis discussed above.…”

Section: Resultssupporting

confidence: 89%

Synthesis of a cuprite thin film by oxidation of a Cu metal precursor utilizing ultrasonically generated water vapor

et al. 2014

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A Cu 2 O thin film of cuprite crystal structure was fabricated via a decomposition reaction of water vapor generated by ultrasonic vibration. The thin film, which was grown on a soda-lime glass substrate at 530 • C, exhibited a prominent (111) preferred orientation with an optical bandgap of about 2.1 eV and resistivity of 2.81 × 10 4 Ω · cm. Generation of H 2 gas during the reaction process contributed to suppressing the growth of impurity tenorite phase. In a conventional process of thermal oxidation, the formation of the cuprite phase was always accompanied by that of the tenorite phase due to an excess oxygen exposure near the surface of the films.

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“…Recently, the dependence of the performance of CuO anodes on the morphology has been studied [531]. As a result, the reversible capacity of the leaf-like CuO decreases during cycling, which confirms prior results found by different groups on CuO particles with this morphology [532,533], and such is also the case for oatmeal-like CuO. The same holds for hierarchical structures [534].…”

Section: Cuosupporting

confidence: 80%

Anodes for Li-Ion Batteries

et al. 2016

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Lithium-ion batteries (LiBs) have made considerable progress since the first commercial one by Sony in 1991, which had LiCoO 2 and graphite as active elements of the positive and negative electrodes, respectively. The LiBs are now the primary energy storage devices in the transportation and communications, from portable use in computers, up to electric and hybrid vehicles. More recently, they have also been used as back-up supply units, frequency regulators (load leveling) to integrate on smart grids the electricity produced by windmills and photovoltaic plants (for a recent review, see [1]). These applications require high energy densities, high power, and safety among others. Considerable efforts have been made to propose other electrodes to fulfill these requirements. We have recently reviewed the works and progress concerning the materials for the positive electrode [2][3][4][5][6]. The present work is devoted to the materials for the negative electrode counterpart. It is common to use the terminology anode and cathode for the negative and positive electrodes, respectively, although the electrodes play alternatively the role of anode and cathode during the charge and discharge process. We shall use this terminology in the following for conciseness purposes only.An ideal active anode element should fulfill the following requirements as follows: (1) It must be light and accommodate as much Li as possible to optimize the gravimetric capacity. (2) Its redox potential with respect to Li 0 /Li + must be as small as possible at any Li-concentration. The reason is that this potential is subtracted to the redox potential of the cathode material to give the overall voltage of the cell, and smaller voltage means smaller energy density. (3) It must possess good electronic and ionic conductivities since faster motion of the lithium ions and the electrons also mean higher power density of the cell. (4) It must not be soluble in the solvents of the electrolyte and not react with the lithium salt. (5) It must be safe, i.e. avoid any thermal runaway of the battery, a criterion that is not independent of the previous one, but deserves special attention, especially for use in transportation such as electric vehicles and planes. (6) It must be cheap and environmentally friendly. The different materials proposed as anode elements for Li-ion batteries must be discussed with respect to these different criteria.The graphite is still the most used anode material and is still the reference. The first works giving evidence of the insertion of lithium in graphite date from 1955 [7], confirmed by the synthesis of LiC 6 in 1965 [8]. The synthesis of LiC 6 , however, was not obtained by electrochemical process at that time. Another decade was spent before Besenhard and Eichinger discovered the reversible intercalation of lithium in graphite, proposing this material as an anode in 1976 [9,10]. Increasing the Li content in LiC 6 is possible [8], but no reversible cycling beyond LiC 6 could ever be obtained. The graphite anode can thus be cyc...

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Synthesis, characterization, and electrochemical properties of self-assembled leaf-like CuO nanostructures

Cited by 89 publications

References 48 publications

Fabrication of wheat grain textured TiO2/CuO composite nanofibers for enhanced solar H2 generation and degradation performance

Fabrication of wheat grain textured TiO2/CuO composite nanofibers for enhanced solar H2 generation and degradation performance

Synthesis of a cuprite thin film by oxidation of a Cu metal precursor utilizing ultrasonically generated water vapor

Anodes for Li-Ion Batteries

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