Thorough Characterization of Sputtered CuO Thin Films Used as Conversion Material Electrodes for Lithium Batteries

Pecquenard, Brigitte; Cras, Frédéric Le; Poinot, Delphine; Sicardy, O.; Manaud, J.P.

doi:10.1021/am4055386

Cited by 39 publications

(24 citation statements)

References 38 publications

(60 reference statements)

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“…Cu 4 O 3 has been observed before in thin‐film electrodes by TEM and here we observed Cu 4 O 3 phase in composite electrodes. At the end of delithiation, most of the composite electrodes show reversible Cu 2 O phase rather than Cu 4 O 3 ,, which explains the high capacity reported in the present work.…”

Section: Introductionsupporting

confidence: 61%

Reversible Cu₄O₃ Phase Formation in CuO Nanoplate Anodes for High Capacity and High Coulombic Efficiency

et al. 2017

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Conversion materials with high specific capacity are of interest to improve energy density of Li‐ion batteries. Here, we present results concerning hydrothermally synthesized CuO nanoplates that exhibit high specific capacity of 800 and 698 mAh/g at C/2 and 1C rates respectively and 180 mAh/g at a high rate of 30C. The electrodes exhibit high Coulombic efficiencies of about 66% and 60% at C/2 and 1C rate respectively, these are high efficiency values compared to the ones reported in the literature at respective rates. To understand the high performance, ex situ x‐ray diffraction at different states of first discharge/charge is utilized that shine light on the lithiation/delithiation pathways of the CuO nanoplates. Lithiation proceeds through multiple phase transition CuO → Cu4O3 → Cu2O → Cu and it was found that Cu4O3 is reversible at the end of first charge. Cu and residual Cu2O was observed at the end of lithiation along with Li2O and Li2O2 phases. At the end of first charge, Cu4O3 phase along with CuO was observed as a major end‐product with relatively minor concentrations of Cu2O. Cu4O3 as a major constituent observed in composite electrode seems to be the key information that can explain good reversibility and high Coulombic efficiency reported in the present work.

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Section: Introductionsupporting

confidence: 61%

Reversible Cu₄O₃ Phase Formation in CuO Nanoplate Anodes for High Capacity and High Coulombic Efficiency

et al. 2017

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“…[31][32][33][34][35][36] Recently, CuO has been revisited as an efficient material for the preparation of microwave absorbing materials. [37][38][39][40] For example, copper oxide-carbon fiber composites have been synthesized by annealing copper-carbon fibers in air and the minimum reflection loss is À29.6 dB at 7.8 GHz.…”

Section: Introductionmentioning

confidence: 99%

Facile synthesis and enhanced microwave absorption properties of novel hierarchical heterostructures based on a Ni microsphere–CuO nano-rice core–shell composite

Zhao

Shao

Fan

et al. 2015

Phys. Chem. Chem. Phys.

109

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A novel hierarchical heterostructure of Ni microspheres-CuO nano-rices was fabricated using a simple two-step process. The CuO rices were densely deposited on the surfaces of Ni microspheres. The phase purity, morphology, and structure of composite heterostructures are characterized by X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), energy dispersive X-ray spectroscopy (EDS), and transmission electron microscopy (TEM). Different structured Ni-CuO composite heterostructures are also investigated by adjusting the volume ratio of the reactants. The core-shell rice-like CuO-coated Ni exhibits better antioxidation capability than pure Ni due to the presence of the barrier effect of the CuO shell, which is revealed by the thermogravimetric analysis (TGA). In comparison with pristine Ni microspheres and CuO nanoflakes, the Ni-CuO composites exhibit excellent microwave absorption properties. Moreover, the amount of CuO plays a vital role in the microwave attenuation of Ni-CuO composites. The Ni-CuO heterostructures prepared at 0.017 M Cu(2+) exhibit the best electromagnetic wave absorption capabilities. A minimum reflection loss reaches -62.2 dB (>99.9999% microwave absorption) at 13.8 GHz with the thickness of only 1.7 mm. The effective absorption (below -10 dB) bandwidth can be tuned between 6.4 GHz and 18.0 GHz by tuning the absorber thickness of 1.3-3.0 mm. Thus, the Ni-CuO composite possesses a fascinating microwave absorption performance as a novel absorbing material with strong absorption, wide-band gap and thin thickness.

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“…The thickness of the layers can also be finely controlled which can be useful to counterbalance low ionic/electronic conductivity. Electrode materials that can be prepared by sputtering or by pulsed laser deposition are indeed numerous and include well-known intercalation materials LiCoO 2 Yoon et al, 2013), LiMn 2 O 4 (Jones et al, 1994), LiNi 0.5 Mn 1.5 O 4 (Xia et al, 2007), LiFePO 4 (Bajars et al, 2011), V 2 O 5 (West et al, 1992), conversion reaction materials FeS 2 (Pelé et al, 2015), CuO (Pecquenard et al, 2014), and pure or mixed Li-alloying materials (Dimov, 2009). In bulk battery systems, the use of lithium alloy negative electrodes has generally been avoided due to the significant volume changes which occur during the alloying process as a result of lithium insertion/removal (Besenhard et al, 1997).…”

Section: Introductionmentioning

confidence: 99%

Insight Into the Formation of Lithium Alloys in All-Solid-State Thin Film Lithium Batteries

et al. 2018

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Solid-state thin film batteries utilize electrode and electrolyte components which are nanometers or micrometers thick, enabling the production of novel devices with new form factors. Here, in situ X-ray diffraction is used to carry out the first study of a solid-state thin film lithium-ion battery containing a solid-state LiPON electrolyte and Bi negative electrode. The structure-electrochemistry relationships in the Li-Bi system are revealed and details of cell construction, data collection, and data analysis is presented to guide for research.

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Thorough Characterization of Sputtered CuO Thin Films Used as Conversion Material Electrodes for Lithium Batteries

Cited by 39 publications

References 38 publications

Reversible Cu₄O₃ Phase Formation in CuO Nanoplate Anodes for High Capacity and High Coulombic Efficiency

Reversible Cu₄O₃ Phase Formation in CuO Nanoplate Anodes for High Capacity and High Coulombic Efficiency

Facile synthesis and enhanced microwave absorption properties of novel hierarchical heterostructures based on a Ni microsphere–CuO nano-rice core–shell composite

Insight Into the Formation of Lithium Alloys in All-Solid-State Thin Film Lithium Batteries

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Thorough Characterization of Sputtered CuO Thin Films Used as Conversion Material Electrodes for Lithium Batteries

Cited by 39 publications

References 38 publications

Reversible Cu4O3 Phase Formation in CuO Nanoplate Anodes for High Capacity and High Coulombic Efficiency

Reversible Cu4O3 Phase Formation in CuO Nanoplate Anodes for High Capacity and High Coulombic Efficiency

Facile synthesis and enhanced microwave absorption properties of novel hierarchical heterostructures based on a Ni microsphere–CuO nano-rice core–shell composite

Insight Into the Formation of Lithium Alloys in All-Solid-State Thin Film Lithium Batteries

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Reversible Cu₄O₃ Phase Formation in CuO Nanoplate Anodes for High Capacity and High Coulombic Efficiency

Reversible Cu₄O₃ Phase Formation in CuO Nanoplate Anodes for High Capacity and High Coulombic Efficiency