A novel porous CuO nanorod/rGO composite as a high stability anode material for lithium-ion batteries

Zhang, Xing; Hu, Yongan; Zhu, Daozheng; Xie, Anjian; Shen, Yuhua

doi:10.1016/j.ceramint.2015.09.147

Cited by 45 publications

(15 citation statements)

References 38 publications

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“…The other three peaks around 40°, 46° and 68° are characteristic of face centered cubic (fcc) crystalline Pd, corresponding to the diffraction peaks of Pd crystal faces (111), (200) and (220), respectively. The XRD patterns do not show any peak corresponding to the Cu [75], CuO [49] or Cu2O [58]. These indicated that Cu(0), CuO and Cu2O have not existed in the form of crystals as the other studies described [29,39].…”

Section: Materials Characterizationmentioning

confidence: 64%

Carbon Supported Oxide-Rich Pd-Cu Bimetallic Electrocatalysts for Ethanol Electrooxidation in Alkaline Media Enhanced by Cu/CuOx

Guo

Liu

et al. 2016

Catalysts

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Different proportions of oxide-rich PdCu/C nanoparticle catalysts were prepared by the NaBH 4 reduction method, and their compositions were tuned by the molar ratios of the metal precursors. Among them, oxide-rich Pd 0.9 Cu 0.1 /C (Pd:Cu = 9:1, metal atomic ratio) exhibits the highest electrocatalytic activity for ethanol oxidation reaction (EOR) in alkaline media. X-ray photoelectron spectroscopy (XPS) and high resolution transmission electron microscopy (HRTEM) confirmed the existence of both Cu and CuO x in the as-prepared Pd 0.9 Cu 0.1 /C. About 74% of the Cu atoms are in their oxide form (CuO or Cu 2 O). Besides the synergistic effect of Cu, CuO x existed in the Pd-Cu bimetallic nanoparticles works as a promoter for the EOR. The decreased Pd 3d electron density disclosed by XPS is ascribed to the formation of CuO x and the spill-over of oxygen-containing species from CuO x to Pd. The low Pd 3d electron density will decrease the adsorption of CH 3 CO ads intermediates. As a result, the electrocatalytic activity is enhanced. The onset potential of oxide-rich Pd 0.9 Cu 0.1 /C is negative shifted 150 mV compared to Pd/C. The oxide-rich Pd 0.9 Cu 0.1 /C also exhibited high stability, which indicated that it is a candidate for the anode of direct ethanol fuel cells (DEFCs).

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Section: Materials Characterizationmentioning

confidence: 64%

Carbon Supported Oxide-Rich Pd-Cu Bimetallic Electrocatalysts for Ethanol Electrooxidation in Alkaline Media Enhanced by Cu/CuOx

Guo

Liu

et al. 2016

Catalysts

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“…It has been recently shown that using sodium carboxyl methyl cellulose (CMC) as the binder in CuO electrodes allows for a better cycling stability than when using polyvinylidene fluoride (PVDF). For example, 2–3 μm CuO particles with a PVDF binder exhibited a rapid capacity decay from 625 mAh g −1 to 199 mAh g −1 after 100 cycles (32 % capacity retention), while employing CMC as the binder, allowed the capacity retention to be 92 % after the same cycles . In order to understand the underlying mechanisms that allow CMC to give an increased capacity stability, 1D structured CuO/Cu 2 O nanorods were applied herein as the active materials in porous electrodes considering either CMC or PVDF as the binder.…”

Section: Introductionmentioning

confidence: 99%

“…For example, 2-3 μm CuO particles with a PVDF binder exhibited a rapid capacity decay from 625 mAh g À 1 to 199 mAh g À 1 after 100 cycles (32 % capacity retention), while employing CMC as the binder, allowed the capacity retention to be 92 % after the same cycles. [10] In order to understand the underlying mechanisms that allow CMC to give an increased capacity stability, 1D…”

Section: Introductionmentioning

confidence: 99%

Transforming Single‐Crystal CuO/Cu₂O Nanorods into Nano‐Polycrystalline Cu/Cu₂O through Lithiation

Dorogov

Xin

et al. 2019

ChemElectroChem

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One‐dimensional single‐crystal CuO/Cu2O nanorods were fabricated by controlled oxidation of a copper substrate and examined as the active material in porous anodes for lithium‐ion batteries. Electrochemical testing against Li‐metal revealed that using sodium carboxyl methyl cellulose (CMC) as the binder enabled an excellent capacity retention for 50 cycles, while the use of polyvinylidene fluoride (PVDF) resulted in a continuous capacity fade. Transmission electron microscopy illustrated the phase composition and morphological changes throughout cycling, revealing that for both types of binders, lithiation of CuO and Cu2O disrupted the single‐crystal nanorod structure, producing multiple Cu/Cu2O nanograins within the rods. With continuous cycling the average grain size of these nanocrystals decreased. A significant difference between the CMC and PVDF binder electrodes was the irreversible formation of LiCuO during delithiation for the PVDF case, which can explain the continuous capacity fade. Scanning electron microscopy also revealed microcracks throughout the electrode surface when the PVDF binder was employed.

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“…To address these issues, strategies of nanostructuralization and carbon integration have been widely adopted to enhance its electrochemical properties. For example, various carbonaceous materials have been explored as hosts for CuO materials, such as carbon nanotube, pyrolytic carbon, reduced graphene oxide . The carbon additives act as conductive frameworks to prevent the agglomeration and pulverization of CuO active materials upon repeated (de)lithiation process and enhance the electronic conductivity of the composites, consequently improving the electrochemical performance of LIBs.…”

Section: Introductionmentioning

confidence: 99%

In Situ Fabrication of Hierarchical CuO@Cu Microspheres Composed of Nanosheets as High‐Performance Anode Materials for Lithium‐Ion Batteries

Chen

et al. 2019

ChemistrySelect

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Transition metal oxides have been regarded as promising anode candidates for high-energy lithium-ion batteries. Herein, we report the fabrication of hierarchical CuO@Cu microspheres composed of nanosheets by an in-situ oxidation process for lithium-ion batteries. As anodes, the composite delivers a reversible specific capacity of 850 mAh g À 1 at 100 mA g À 1 , and maintains at 643 mAh g À 1 at 1 A g À 1 for 600 cycles. The superior reversible capacity and cycling stability of the CuO@Cu micro-spheres can be attributed to their unique hierarchical structure, which not only alleviates the structural variation, shortens the ion diffusion length upon cycling, but also improves the electrical conductivity with remained metallic Cu. The presented results offer an efficient way to design hierarchical micro-nanostructure for high-performance anode materials in lithium-ion batteries.

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A novel porous CuO nanorod/rGO composite as a high stability anode material for lithium-ion batteries

Cited by 45 publications

References 38 publications

Carbon Supported Oxide-Rich Pd-Cu Bimetallic Electrocatalysts for Ethanol Electrooxidation in Alkaline Media Enhanced by Cu/CuOx

Carbon Supported Oxide-Rich Pd-Cu Bimetallic Electrocatalysts for Ethanol Electrooxidation in Alkaline Media Enhanced by Cu/CuOx

Transforming Single‐Crystal CuO/Cu₂O Nanorods into Nano‐Polycrystalline Cu/Cu₂O through Lithiation

In Situ Fabrication of Hierarchical CuO@Cu Microspheres Composed of Nanosheets as High‐Performance Anode Materials for Lithium‐Ion Batteries

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A novel porous CuO nanorod/rGO composite as a high stability anode material for lithium-ion batteries

Cited by 45 publications

References 38 publications

Carbon Supported Oxide-Rich Pd-Cu Bimetallic Electrocatalysts for Ethanol Electrooxidation in Alkaline Media Enhanced by Cu/CuOx

Carbon Supported Oxide-Rich Pd-Cu Bimetallic Electrocatalysts for Ethanol Electrooxidation in Alkaline Media Enhanced by Cu/CuOx

Transforming Single‐Crystal CuO/Cu2O Nanorods into Nano‐Polycrystalline Cu/Cu2O through Lithiation

In Situ Fabrication of Hierarchical CuO@Cu Microspheres Composed of Nanosheets as High‐Performance Anode Materials for Lithium‐Ion Batteries

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Transforming Single‐Crystal CuO/Cu₂O Nanorods into Nano‐Polycrystalline Cu/Cu₂O through Lithiation