Preparation method of CuxVyOz coating for positive electrode of lithium ion battery

Abstract

A preparation method of a CuxVyOz coating for a positive electrode of a lithium ion battery comprises the following steps of placing a CuO-acetylene black target material and a V2O5 target material in two radio frequency target positions; fixing a single light aluminum foil on a film coating sample table; vacuumizing a film coating chamber and a sample chamber of a magnetron sputtering device; introducing Ar gas into the film coating chamber; setting a heating temperature of the aluminum foil to be 350-600 DEG C and the radio frequency sputtering power to be 50-400W; and starting to carry film coating on the aluminum foil, so that the mole ratio of Cu atom to V atom which are sputtered is 1:1, and the sputtering time is 10-100 minutes. A CuxVyOz thin film is synthesized on the aluminum foil at one step by radio frequency magnetron sputtering, and the prepared sample can be directly applied to the positive electrode of the lithium ion battery after stamped and cut. The method is high in reaction efficiency and high in film formation, the prepared coating is uniform in constituents, high in adhesive force and high in durability and stability, and the performance of the lithium battery is favorably enhanced and improved.

Description

technical field [0001] The invention belongs to the field of new energy materials and electrochemistry, and relates to a preparation method of a positive electrode material of a lithium ion battery, in particular to a preparation method of a copper vanadate coating used for a positive electrode of a lithium ion battery. Background technique [0002] The development of information technology has greatly promoted social progress, and the popularity of the new generation of Internet technology has brought great convenience to all aspects of human life, and various electronic devices have emerged in an endless stream. But all of this is inseparable from the support of energy. Due to the advantages of high energy density, high power density, long cycle life and wide temperature range, lithium-ion secondary batteries are widely used in electric vehicles, aerospace, civilian and military electronic equipment and other fields. However, the development of technology has put forward ...

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Problems solved by technology

Among them, although the high-temperature solid-phase method is low in cost and easy to operate, it consumes a lot of energy, and the synthesized powder is severely agglomerated and the composition is not uniform; the hydrothermal method is simple to prepare and easy to control the shape, but requires special equipment and high-temperature and high-pressure environments. It is not suitable for large-scale production; the powder prepared by the sol-gel method has the advantages of uniform particle size and uniform composition, but there are many variables in the reaction process, the environmental requirements are harsh, and the process factors are not easy to control; the preparation process of the coprecipitation method is simple, low in cost, The preparation conditions are easy to control, the synthesis cycle is short, etc., but the addition of precipitating agent will cause product agglomeration and uneven composition

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