Method for alleviating air expansion of lithium ion battery

A lithium-ion battery and flatulence technology, which is applied in the manufacture of non-aqueous electrolyte batteries, electrolyte batteries, electrodes, etc., can solve the problems that are difficult to get coated, and carbon coating cannot be completely solved.

Inactive Publication Date: 2014-12-03
镇江智联德科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the carbon coating method has not been very successful, mainly because it is difficult to obtain a very uniform coating along the entire particle surface
Therefore, carbon coating cannot completely solve the problem of LTO high temperature gas production

Method used

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  • Method for alleviating air expansion of lithium ion battery
  • Method for alleviating air expansion of lithium ion battery
  • Method for alleviating air expansion of lithium ion battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] a. LiCoO 2 Place the electrode sample in the reaction chamber of the atomic layer deposition instrument, vacuumize and heat the reaction chamber to 400 Kelvin, keep the electrode sample at the set temperature for 25 minutes, and the air pressure in the reaction chamber is 10 mTorr;

[0038] b. Open the outlet valve, pulse the cleaning gas, and clean for 15 seconds;

[0039] c. Close the outlet valve, pulse gaseous trimethylaluminum for 0.01 seconds, and then keep for a period of 60 seconds;

[0040] d. Then open the gas outlet valve, pulse sweeping gas argon, and sweep for 1 minute; close the gas outlet valve, vacuumize, and remove excess reaction by-products;

[0041] e. Then close the outlet valve, pulse gaseous water for 10 seconds, and then keep it for 5 seconds;

[0042] f. Then open the outlet valve, pulse sweeping gas argon, and sweep for 1 minute; close the outlet valve again, vacuumize, and remove excess reaction by-products;

[0043] g. Return to step c and e...

Embodiment 2

[0046] a. LiNi 0.8 mn 0.1 co 0.1 o 2 The electrode sample is placed in the reaction chamber of the atomic layer deposition instrument, vacuumed and the temperature of the reaction chamber is heated to 450 Kelvin, so that the electrode sample is kept at the set temperature for 5 minutes, and the air pressure in the reaction chamber is 10 millitorr;

[0047] b. Open the outlet valve, pulse sweeping gas nitrogen, and sweep for 3s;

[0048] c. Close the outlet valve, pulse gaseous aluminum trichloride for 10 seconds, and then keep it for 1 second;

[0049] d. Then open the air outlet valve, pulse purge nitrogen, and sweep for 0.1 minutes; close the air outlet valve, vacuumize, and remove excess reaction by-products;

[0050] g. Return to step c and execute step c and the following steps in a loop.

[0051] An electrode with a metal oxide thickness of approximately 2 angstroms was obtained. Such as figure 2 As shown, the anti-flatulence of the battery was tested: after 15 c...

Embodiment 3

[0053] a. LiNi 0.6 mn 0.2 co 0.2 o 2 The electrode sample is placed in the reaction chamber of the atomic layer deposition instrument, vacuumized and the temperature of the reaction chamber is heated to 500 Kelvin, and the electrode sample is kept at the set temperature for 5 minutes, and the air pressure in the reaction chamber is 10 millitorr;

[0054] b. Open the outlet valve, pulse sweeping gas argon, and sweep for 10s;

[0055] c. Close the outlet valve, pulse gaseous tetraisopropyl titanate for 1 second, and then keep it for 20 seconds;

[0056] d. Then open the gas outlet valve, pulse sweeping gas argon, and sweep for 0.5 minutes; close the gas outlet valve, vacuumize, and remove excess reaction by-products;

[0057] e. Then close the outlet valve, pulse ozone for 1 second, and then keep it for 30s;

[0058] f. Then open the outlet valve, pulse sweeping gas argon, and sweep for 0.1 to 1 minute; close the outlet valve again, vacuumize, and remove excess reaction by-...

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Abstract

The invention relates to a method for alleviating air expansion of a lithium ion battery. The method comprises the following steps: a, arranging an electrode sample in a reaction cavity of an atomic layer deposition instrument, vacuumizing, and heating a reaction chamber till the temperature of the reaction chamber is 300-1000 Kelvin, wherein the electrode sample is kept at the set temperature for 5-30 minutes, and the air pressure in the reaction cavity is lower than 0.01 atmospheric pressure; b, opening an air outlet valve, pulsing cleaning gas, and cleaning for 3-60 seconds; c, closing the air outlet valve, and pulsing a gaseous precursor A or a mixture of a precursor A and carrier gas; d, opening the air outlet valve, pulsing cleaning gas, closing the air outlet valve, vacuumizing, and removing excessive reaction byproducts; and g, returning to the step c, and cyclically executing the steps after c until the needed coating thickness of 2-30 angstroms is obtained. According to the invention, as a uniform metallic oxide coating is formed on the surface of an electrode, charge-discharge air expansion of the lithium ion battery can be effectively alleviated, so that the service life of the lithium battery is prolonged, and the safety of the lithium battery is improved. Moreover, the method is worthy of popularization and application.

Description

technical field [0001] The invention relates to the technical field of manufacturing lithium ion batteries, in particular to a method for reducing flatulence of lithium ion batteries. Background technique [0002] Lithium-ion batteries are a rapidly growing application. It has important applications in many fields, including hybrid electric vehicles and plug-in electric vehicles. These batteries typically consist of a lithium-containing transition metal oxide or lithium-containing transition metal phosphate positive electrode and a graphite negative electrode. These electrodes usually consist of electrode powders and organic binders. Therefore, the electrode exhibits a porous structure. [0003] At present, these electrodes and electrode materials have very serious performance deficiencies, and the safety is unsatisfactory. [0004] Lithium battery gas production (flatulence) and battery thickness changes mostly occur at room temperature, high temperature or other extrem...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/058
CPCH01M4/0428H01M10/058Y02E60/10Y02P70/50
Inventor 解明王韫宇
Owner 镇江智联德科技有限公司
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