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Lithium-ion battery negative electrode current collector material and preparation method

A lithium-ion battery and current collector technology, applied in battery electrodes, electrode carriers/current collectors, secondary batteries, etc., can solve the safety hazards of lithium-ion batteries, such as explosions and fires, and improve the chemical properties that are easily oxidized, Effects of improving safety performance and improving corrosion resistance

Active Publication Date: 2016-06-29
SHANDONG GOLDENCELL ELECTRONICS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Lithium-ion batteries are far superior to other secondary batteries in terms of specific capacity, no memory effect, long cycle life, and environmental protection. Lithium-ion batteries are called "ultimate batteries", but why are there no lithium-ion batteries in the field of large-capacity batteries? Where is the figure? The key issue is restricted by the safety issues of lithium-ion batteries. The biggest safety hazards of lithium-ion batteries are explosions, fires, etc.

Method used

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  • Lithium-ion battery negative electrode current collector material and preparation method
  • Lithium-ion battery negative electrode current collector material and preparation method
  • Lithium-ion battery negative electrode current collector material and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0019] First, clean the surface of the copper foil in distilled water at 100°C to remove impurities such as oil stains on the surface, take it out after 30 minutes, dry it under vacuum at 105°C for 3 hours, and then cool it to room temperature in vacuum.

[0020] BiTiO doped with La and Mn 3 is the sputtering target, metal copper foil is the sputtering substrate, and the chamber is pre-evacuated to 5×10 -3 Pa, and then argon gas is introduced into the cavity, and the pressure in the cavity is controlled to be 1.5 Pa to heat the base copper foil to 500°C. The parameters of the equipment are: RF power: 100W, accelerating voltage: 200V, current density: 30mA / cm 2 , the distance between the sputtering target and the substrate is 60mm, and the speed of the substrate is 2m / min. Cool to room temperature in argon after sputtering.

[0021] After passing through the radio frequency magnetron sputtering process, it was first cleaned with distilled water, then dried in vacuum at 105 °...

Embodiment approach 2

[0025] Clean the surface of the copper foil in distilled water at 100°C to remove impurities such as oil stains on the surface, take it out after 50 minutes, dry it under vacuum at 105°C for 2.5 hours, and then cool it to room temperature in vacuum.

[0026] BiTiO doped with La and Mn 3 is the sputtering target, metal copper foil is the sputtering substrate, and the chamber is pre-evacuated to 5×10 -3 Pa, and then argon gas is introduced into the cavity, and the pressure in the cavity is controlled to be 1.5 Pa to heat the base copper foil to 700°C. The parameters of the equipment are: RF power: 120W, accelerating voltage: 240V, current density: 40mA / cm 2 , the distance between the sputtering target and the substrate is 70 mm, and the speed of the substrate is 4 m / min. Cool to room temperature in argon after sputtering.

[0027] After passing through the radio frequency magnetron sputtering process, it was first cleaned with distilled water, then dried in vacuum at 105 °C f...

Embodiment approach 3

[0031] First, clean the surface of the copper foil in distilled water at 100°C to remove impurities such as oil stains on the surface, take it out after 60 minutes, dry it under vacuum at 105°C for 2 hours, and then cool it to room temperature in vacuum.

[0032] BiTiO doped with La and Mn 3 is the sputtering target, metal copper foil is the sputtering substrate, and the chamber is pre-evacuated to 5×10 -3 Pa, and then argon gas is passed into the cavity, and the pressure in the cavity is controlled to be 1.5 Pa to heat the base copper foil to 800°C. The parameters of the equipment are: RF power: 140W, accelerating voltage: 300V, current density: 50mA / cm 2 , the distance between the sputtering target and the substrate is 90 mm, and the speed of the substrate is 6 m / min. Cool to room temperature in argon after sputtering.

[0033] After passing through the radio frequency magnetron sputtering process, it was first cleaned with distilled water, then dried in vacuum at 105 °C ...

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Abstract

The invention provides a lithium ion battery negative electrode current collector material and a preparation method thereof. The surface of a lithium ion battery cathode current collector material copper foil is coated with a BiTiO3 layer with which is doped with La and Mn in the doping thickness of 2 to 4 micrometers. The preparation method comprises the steps: washing impurities such as oil contamination on the surface of the copper foil in distilled water at the temperature of 100DEG C, taking out the copper foil after 30 to 60 minutes, drying the copper foil for 2h to 3h under the vacuum condition of 105 DEG C, then cooling the copper foil to the room temperature in a vacuum environment, pre-vacuumizing a cavity to 5*10<-3>Pa by adopting the BiTiO3 doped with La and Mn as a sputtering target and metal copper foil as a sputtering base material, introducing argon into the cavity, controlling the pressure in the cavity at 1.5Pa, and heating the copper foil base material to 500 to 800 DEG C, wherein parameters of used equipment are as follows: the radio frequency power is 100 to 140 W, the acceleration voltage is 200 to 300 V, the speed of the base material is 26m / min; cooling the copper foil to the room temperature after being sputtered. By adopting the lithium ion battery cathode current collector copper foil material, the safety performance of a lithium ion battery can be effectively improved.

Description

technical field [0001] The invention provides a lithium ion battery negative electrode current collector material and a preparation method. Background technique [0002] Today, with the rapid development of science and technology, with the extensive application of electronic equipment such as mobile phones, digital cameras, and notebook computers in human life, lithium-ion batteries have also rapidly developed into an important industry in the field of secondary batteries. Lithium-ion batteries are far superior to other secondary batteries in terms of specific capacity, no memory effect, long cycle life, and environmental protection. Lithium-ion batteries are called "ultimate batteries", but why are there no lithium-ion batteries in the field of large-capacity batteries? Where is the figure? The key issue is restricted by the safety issues of lithium-ion batteries. The biggest safety hazards of lithium-ion batteries are explosions and fires. [0003] The production process...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/66C23C14/35C23C14/06
CPCC23C14/06C23C14/35H01M4/667H01M10/0525Y02E60/10
Inventor 关成善宗继月李涛贾传龙刘艳辉
Owner SHANDONG GOLDENCELL ELECTRONICS TECH