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

A lithium-ion battery and copper vanadate technology, which is applied in electrode manufacturing, battery electrodes, secondary batteries, etc., can solve problems such as difficult control of process factors, serious powder agglomeration, and harsh environmental requirements, so as to reduce human operation errors, The preparation method is simple and the effect of improving performance

Active Publication Date: 2016-07-20
SHAANXI UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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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

Method used

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

Examples

Experimental program
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Effect test

Embodiment 1

[0027] 1) After mixing and granulating analytically pure CuO and acetylene black with a binder, pre-fire in an atmosphere furnace at 200°C, and at the same time pass Ar gas into the atmosphere furnace, and the flow rate of Ar gas is 100mL / min, Obtain CuO-acetylene black target; V 2 o 5 After mixing with the binder and granulating, it is pre-fired in a muffle furnace at 200°C to prepare V 2 o 5 target, then CuO-acetylene black target and V 2 o 5 The targets were put into the two RF target positions of the magnetron sputtering apparatus respectively; among them, CuO, acetylene black, V 2 o 5 The mass ratio of CuO to binder is 1:0.01:1, the mass ratio of CuO to binder is 30:1, V 2 o 5 The mass ratio to the adhesive is 30:1, and the adhesive is PVA.

[0028] 2) Ultrasonic clean the clean single-sided aluminum foil in acetone and ethanol for 30 minutes respectively, then rinse it with deionized water, dry it with nitrogen, and put it in a sealed clean container for later us...

Embodiment 2

[0033] 1) After mixing and granulating analytically pure CuO and acetylene black with a binder, pre-fire in an atmosphere furnace at 300°C, and at the same time pass Ar gas into the atmosphere furnace, and the flow rate of Ar gas is 200mL / min, Obtain CuO-acetylene black target; V 2 o 5After mixing with the binder and granulating, it was pre-fired in a muffle furnace at 300°C to prepare V 2 o 5 target, then CuO-acetylene black target and V 2 o 5 The targets were put into the two RF target positions of the magnetron sputtering apparatus respectively; among them, CuO, acetylene black, V 2 o 5 The mass ratio of CuO to binder is 1:0.05:1, the mass ratio of CuO to binder is 30:1, V 2 o 5 The mass ratio to the adhesive is 30:1, and the adhesive is PVA.

[0034] 2) Ultrasonic clean the clean single-sided aluminum foil in acetone and ethanol for 30 minutes respectively, then rinse it with deionized water, dry it with nitrogen, and put it in a sealed clean container for later us...

Embodiment 3

[0039] 1) After mixing and granulating analytically pure CuO and acetylene black with a binder, pre-fire in an atmosphere furnace at 400°C, and at the same time pass Ar gas into the atmosphere furnace, and the flow rate of Ar gas is 300mL / min, Obtain CuO-acetylene black target; V 2 o 5 After mixing with the binder and granulating, it is pre-fired in a muffle furnace at 400°C to prepare V 2 o 5 target, then CuO-acetylene black target and V 2 o 5 The targets were put into the two RF target positions of the magnetron sputtering apparatus respectively; among them, CuO, acetylene black, V 2 o 5 The mass ratio of CuO to binder is 1:0.1:1, the mass ratio of CuO to binder is 30:1, V 2 o 5 The mass ratio to the adhesive is 30:1, and the adhesive is PVA.

[0040] 2) Ultrasonic clean the clean single-sided aluminum foil in acetone and ethanol for 30 minutes respectively, then rinse it with deionized water, dry it with nitrogen, and put it in a sealed clean container for later use...

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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 ...

Claims

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Application Information

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IPC IPC(8): H01M4/48H01M10/0525H01M4/04C01G31/00
CPCC01G31/00H01M4/0426H01M4/483H01M10/0525Y02E60/10
Inventor 卢靖王勇黄剑锋张亚宾程龙贾娜曹丽云
Owner SHAANXI UNIV OF SCI & TECH
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