Rational synthesis of copper vanadates/polypyrrole nanowires with enhanced electrochemical property

Zhang, Shaoyan; Sun, Yan; Li, Chunsheng; Hu, Ruisheng

doi:10.1016/j.matlet.2012.09.113

Cited by 11 publications

(9 citation statements)

References 17 publications

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“…Yu et al constructs the nanocomposite of zinc pyrovanadate nanoplates embedded in graphene networks, which exhibits a higher reversible capacity than pristine zinc pyrovanadate. A copper vanadates/polypyrrole core–shell composite was prepared by a hydrothermal method, and the electrochemical performance of copper vanadates/polypyrrole was significantly improved compared with bare copper vanadates . Moreover, compared to the nanocoated of carbon or inactive material, the electrodes coated by another semiconductor material can construct a heterointerfaces structure.…”

Section: Introductionmentioning

confidence: 99%

“…A copper vanadates/ polypyrrole core−shell composite was prepared by a hydrothermal method, and the electrochemical performance of copper vanadates/polypyrrole was significantly improved compared with bare copper vanadates. 27 to the nanocoated of carbon or inactive material, the electrodes coated by another semiconductor material can construct a heterointerfaces structure. This structure could improve the electrochemical performance of electrodes by enhancing the surface reaction kinetics and facilitating charge transport due to its internal electric field, 28−30…”

Section: ■ Introductionmentioning

confidence: 99%

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Improved Li-Storage Properties of Cu₂V₂O₇ Microflower by Constructing an in Situ CuO Coating

Wang

Cao

Huang

et al. 2019

ACS Sustainable Chem. Eng.

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As an anode material for lithium ion batteries, metal vanadates undergo structure variation in the lithiation process. In the case of copper pyrovanadate (Cu2V2O7), it would decompose to be amorphism after the first deeply discharge process (cutoff voltage ≤ 1.5 V). This single-pass process leads to an abrupt capacity fading and poor electrochemical performance. In this paper, a novel CuO coated Cu2V2O7 microflower (Cu2V2O7@CuO) is first synthesized by a facile hydrothermal-heat treatment. The CuO not only relieves the single-pass reconstruction of Cu2V2O7 in the initial discharge but also elevates the Li+ diffusion kinetics in the cycle process via the heterointerfaces. And thus, the Cu2V2O7@CuO microflower displays a reversible capacity of 662.9 mAh g–1 at 100 mA g–1 after 100 cycles. Even at a high rate of 5000 mA g–1, the as-product exhibits an excellent capacity of 220 mAh g–1. These results show that constructing an in situ coating is a worthwhile modification method for improving the electrochemical properties of metal vanadates.

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Section: Introductionmentioning

confidence: 99%

Section: ■ Introductionmentioning

confidence: 99%

Improved Li-Storage Properties of Cu₂V₂O₇ Microflower by Constructing an in Situ CuO Coating

Wang

Cao

Huang

et al. 2019

ACS Sustainable Chem. Eng.

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“…The band at 748 cm −1 (0 and 1 h) can be assigned to the asymmetric vibrations of V-O-Ni and V-O-V. The strong absorption peaks at 3324–3335 cm −1 and 1617 cm −1 correspond to the vibrations of H 2 O molecules [ 25 ].…”

Section: Resultsmentioning

confidence: 99%

Precipitation Stripping of V(V) as a Novel Approach for the Preparation of Two-Dimensional Transition Metal Vanadates

Sánchez-Loredo,

Chekhonin,

Ebert

et al. 2023

Nanomaterials

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Cobalt, nickel, manganese and zinc vanadates were synthesized by a hydrometallurgical two-phase method. The extraction of vanadium (V) ions from alkaline solution using Aliquat® 336 was followed by the production of metal vanadates through precipitation stripping. Precipitation stripping was carried out using solutions of the corresponding metal ions (Ni (II), Co (II), Mn (II) and Zn (II), 0.05 mol/L in 4 mol/L NaCl), and the addition time of the strip solution was varied (0, 1 and 2 h). The time-dependent experiments showed a notable influence on the composition, structure, morphology and crystallinity of the two-dimensional vanadate products. Inspired by these findings, we selected two metallic vanadate products and studied their properties as alternative cathode materials for nonaqueous sodium and lithium metal batteries.

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“…The X-ray diffraction (XRD) patterns of the as-fabricated products were performed with a Rigaku MiniFlexII X-ray generator with Cu Kα radiation (λ = 1.54056 Å). Field emission scanning electron microscopy (FESEM) images were determined on a Hitachi S-4800 scanning electron microscope (SEM) at an accelerating voltage of 10 kV [23][24][25][26][27]. Further structural information of the product was obtained by transmission electron microscopy (TEM, Philips Tecnai G2 F20, acceleration voltage of 200 kV) and selected area electron diffraction (SAED).…”

Section: Resultsmentioning

confidence: 99%

Ultrathin α‐Mg ₂ V ₂ O ₇ nanosheets: controllable fabrication and their formation mechanism

Sun

et al. 2013

Micro & Nano Letters

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Alpha-magnesium vanadate [(α)-Mg 2 V 2 O 7 ] nanosheets with a uniform diameter and thickness were obtained by a simple hydrothermal method. The characterisations of the as-synthesised samples were carried out by X-ray diffraction, scanning electron microscopy and transmission electron microscopy/high-resolution transmission electron microscopy technology. The reaction time is systematically altered to tune the rational growth direction for a sheet-like shape. On the basis of the parallel experiments, a 'dissolution-recrystallisation' mechanism is proposed, which is also beneficial for developing novel functional nanostructures of other alkaline vanadates.

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Rational synthesis of copper vanadates/polypyrrole nanowires with enhanced electrochemical property

Cited by 11 publications

References 17 publications

Improved Li-Storage Properties of Cu₂V₂O₇ Microflower by Constructing an in Situ CuO Coating

Improved Li-Storage Properties of Cu₂V₂O₇ Microflower by Constructing an in Situ CuO Coating

Precipitation Stripping of V(V) as a Novel Approach for the Preparation of Two-Dimensional Transition Metal Vanadates

Ultrathin α‐Mg ₂ V ₂ O ₇ nanosheets: controllable fabrication and their formation mechanism

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Rational synthesis of copper vanadates/polypyrrole nanowires with enhanced electrochemical property

Cited by 11 publications

References 17 publications

Improved Li-Storage Properties of Cu2V2O7 Microflower by Constructing an in Situ CuO Coating

Improved Li-Storage Properties of Cu2V2O7 Microflower by Constructing an in Situ CuO Coating

Precipitation Stripping of V(V) as a Novel Approach for the Preparation of Two-Dimensional Transition Metal Vanadates

Ultrathin α‐Mg 2 V 2 O 7 nanosheets: controllable fabrication and their formation mechanism

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Resources

About

Improved Li-Storage Properties of Cu₂V₂O₇ Microflower by Constructing an in Situ CuO Coating

Improved Li-Storage Properties of Cu₂V₂O₇ Microflower by Constructing an in Situ CuO Coating

Ultrathin α‐Mg ₂ V ₂ O ₇ nanosheets: controllable fabrication and their formation mechanism