4.7 Article

Porous network of ultrathin V6O13-polyoxometalates nanosheets grown on carbon cloth as anode materials for high-performance lithium-ion batteries

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JOURNAL OF ALLOYS AND COMPOUNDS
卷 937, 期 -, 页码 -

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ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2022.168474

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Porous network; Phosphotungstic acid; Anode materials; Lithium-ion battery

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Polyoxometalates (POM) have versatile properties, and here we report the synthesis of a novel 3D porous network of ultrathin V6O13-POM nanosheets on carbon cloth (V6O13-POM//CC) for energy storage. The use of phosphotungstic acid as an inorganic ligand assists in the formation and control of the morphology of V6O13-POM composites, increasing the specific surface area and active sites. The V6O13-POM//CC anode material demonstrates high reversible capacity and stability in lithium-ion batteries, showing potential for commercial applications.
Polyoxometalates (POM) have a wide range of applications in electrochemistry, catalysis, and energy storage due to their variable structure and nature. Here, we designed a novel 3D porous network of ultrathin V6O13- POM nanosheets on carbon cloth (V6O13-POM//CC) for the first time by one-pot hydrothermal method with the help of phosphotungstic acid. Serving as inorganic ligands, the anions of phosphotungstic acid co-ordinate with V cations, facilitating the assembly of nanoclusters and guiding to control of the morphology of V6O13-POM composites, which increases the specific surface area and multiple active sites for the re-action of lithium ions batteries (LIBs). Furthermore, the synergistic effect of V6O13 and POM improves the stability of the structure and increases the capacity of the electrode in LIBs. V6O13-POM//CC as an anode material exhibited a high reversible capacity of 2.03 mAh cm-2 at a high current density of 2 mA cm-2 after 120 cycles. To illustrate the generality of the synthesis strategy, we also obtained MoO3-POM//CC via a similar method. By using V6O13-POM//CC and MoO3-POM//CC as the anode materials, LIBs exhibited high reversible areal specific capacity and excellent cycling stability which are expected to achieve commercial applications.(c) 2022 Elsevier B.V. All rights reserved.

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