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[摘要]：The aqueous-based lithium ion batteries have attracted considerable interest because of their high safety, low cost and environmental friendliness for rechargeable energy storage. Herein, a new anode material, uniform CuV2O5 nanobelts, was prepared through a facile hydrothermal route for the first time. The detailed structures and chemical state of the as-obtained CuV2O5 were investigated and the formation mechanism was proposed. The CuV2O5 nanobelts show high electrical conductivity, which could improve their Li-ion insertion/extraction kinetics. The ex situ XRD, XPS and TG study of the lithiated electrode demonstrated that a considerable amount of hydrated protons were co-intercalated into the layer space of CuV2O5 during the charge process, finally leading to irreversible phase collapse with some amorphization. The CuV2O5 anode exhibited the best cycle performance at pH similar to 8.5, indicating that reducing the co-intercalation of hydrated protons would be an effective way to improve the cycling stability of similar layered vanadates. |
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