A solvothermal method for preparation of flower-like Cu 2 v 2 o 7 -cuo nanocomposite approach

Abstract

The invention discloses a method for preparing a flower-like Cu2V2O7-CuO nanocomposite according to a solvothermal method. The method comprises the following steps: dissolving analytically pure V2O5 powder into an aqueous hydrogen peroxide solution to obtain a solution A; adding the solution A into an ethanol solution of Cu(CH3COO)2 under a magnetic stirring condition; adjusting the pH value of the solution to 7-9, and continuing stirring to form a reaction precursor; pouring the reaction precursor into a reaction kettle, placing in a homogeneous hydrothermal instrument after mounting, performing a hydrothermal reaction at 100-200 DEG C. After the reaction is completed, the apparatus is cooled automatically, and separating, washing and drying a product after completion of the reaction andautomatic cooling of the instrument so as to obtain the flower-like Cu2V2O7-CuO nanocomposite. The solvothermal method is used for preparing the flower-like Cu2V2O7-CuO nanocomposite, and compared with a solid-phase reaction method, the solvothermal method has the advantages as follows: the solvothermal method is cheaper, more convenient and more effective, and the preparation time of theCu2V2O7-CuO nanocomposite is relatively short. The prepared product has high purity, good crystallinity, uniform morphology and size and complete flower-like morphology; the raw materials are easy to obtain, the preparation cycle is short, the energy consumption is low, the process is simple, the repeatability is high, and the feasibility is strong; the prepared flower-like Cu2V2O7-CuO nanocomposite has avery good lithium storage property.

Description

technical field [0001] The invention belongs to the technical field of electrode materials for batteries, and in particular relates to a lithium-ion battery electrode material prepared by a solvothermal method to prepare flower-shaped Cu 2 V 2 o 7 - Method for CuO nanocomposites. Background technique [0002] Copper vanadate (Cu x V y o z ) is a layered structure that can undergo multi-step reduction during intercalation / deintercalation of lithium ions (Cu 2+ / Cu + and Cu + / Cu 0 ), considered to be a lithium-ion battery electrode material with potential application value. Cu 2 V 2 o 7 It is monoclinic phase, C2 / c space group, and has potential application value in negative thermal expansion, magnetism, catalytic oxidation, etc. [0003] As a semiconductor material, Cu 2 V 2 o 7 The synthesis generally adopts the solid-state sintering method, which has a long reaction time, high energy consumption, and the size of the synthesized product is large, which will ...

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Problems solved by technology

[0003] As a semiconductor material, Cu 2 V 2 o 7 The synthesis is generally sintered by solid-state method, the reaction time is long, the energy consumption is high, and the size of the synthesized product is large, which will generate large stress during the battery cycle, which will affect the cycle stability of the battery.

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