Positive plate and lithium ion battery

A technology of positive electrode sheet and positive active material, which is applied in the field of positive electrode sheet and lithium-ion battery, can solve problems such as battery damage, and achieve the effect of avoiding battery damage and improving safety

Pending Publication Date: 2021-12-10
ZHUHAI COSMX BATTERY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The main purpose of the embodiments of the present invention is to provide a positive electrode sheet and a lithium-ion battery, aiming to solve the te

Method used

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  • Positive plate and lithium ion battery
  • Positive plate and lithium ion battery
  • Positive plate and lithium ion battery

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0059] Example 1:

[0060] A aluminum foil having a thickness of 10 microns is used as the positive electrode concentration fluid, and the positive electrode concentration fluid is a multi-poorer structure. The positive electrode active material coating was obtained by using a positive electrode active substance, a conductive agent, and an adhesive according to 96: 1.5: 2.5. The mixed coating was obtained in accordance with the ceramic and antioxidant component ratio of 7: 3.

[0061] At the first coating region 10 of the positive electrode aggregate, a mixed coating is applied, and the positive electrode active material coating is coated at the second coating region 20 of the positive electrode current collector, wherein the coating device can be used simultaneously on the positive electrode fluid. The first coating region 10 and the second coating region 20 are coated. A mixed coating is applied to the third coating region 31 of the ears 30. Wherein, the width of the first coati...

Example Embodiment

[0065] Example 2:

[0066] The thickness of 10 microns is used as a positive electrode current collector, and the positive electrode current collector is a winding structure. The positive electrode active material coating was obtained by using a positive electrode active substance, a conductive agent, and an adhesive according to 96: 1.5: 2.5. The mixed coating was obtained in accordance with the ceramic and antioxidant component ratio of 7: 3.

[0067] At the first coating region 10 of the positive electrode aggregate, a mixed coating is coated at the second coating region 20 of the positive electrode current collector, wherein the coating device can be used first to the positive electrode fluid. A coating region 10 is coated, and the second coating region 20 of the positive electrode current collector is coated. The width of the first coating region 10 is provided is 105 mm.

[0068] The positive electrode sheet is obtained after drying treatment, roller press treatment, dividin...

Example Embodiment

[0071] Example 3:

[0072] A aluminum foil having a thickness of 10 microns is used as the positive electrode concentration fluid, and the positive electrode concentration fluid is a multi-poorer structure. The positive electrode active material coating was obtained by using a positive electrode active substance, a conductive agent, and an adhesive according to 96: 1.5: 2.5. The mixed coating was obtained in accordance with the ceramic and antioxidant component ratio of 7: 3.

[0073] The second coating region 20 of the positive electrode collector is coated with a positive electrode active material coating, and a mixed coating is coated at the first sub-coating region 11 of the positive electrode current collector, and the second sub-coating region 12 of the positive electrode current collector is applied. The mixed coating is coated with a mixed coating of the positive electrode active material coating and a mixed coating. Among them, the width of the second sub-coating region 1...

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Abstract

The invention provides a positive plate and a lithium ion battery, the positive plate comprises a current collector and a tab, the tab is arranged in at least one side of the current collector, the current collector comprises a first coating area arranged close to the tab and a second coating area arranged at one side of the first coating area far away from the tab, and the width of the first coating area is smaller than that of the second coating area; wherein the first coating area is coated with a mixed coating, the second coating area is coated with a positive active material coating, and the mixed coating comprises ceramic and an anti-oxidation component. In the embodiment of the invention, the second coating area is coated with the mixed coating, ceramic in the mixed coating can prevent burrs from being generated on the surface of the pole piece, and the anti-oxidation component in the mixed coating can absorb gas generated after the electrolyte is oxidized, so that the safety of the battery in the preparation and use process is improved, and the battery is prevented from being damaged.

Description

technical field [0001] The invention relates to the technical field of batteries, in particular to a positive electrode sheet and a lithium ion battery. Background technique [0002] During the process of slitting and die-cutting the positive electrode sheet, burrs are easily formed on the surface of the positive electrode sheet. In this way, after the battery is prepared, the burr may pierce the separator, resulting in an internal short circuit of the battery. At the same time, during the charging and discharging process of the battery, the electrolyte may oxidize and produce gas at the positive electrode, which may easily lead to a loose fit between the battery electrodes and may cause battery damage. [0003] To sum up, during the preparation and use of the battery, the burr on the pole piece and the oxidation of the electrolyte caused the battery to be damaged. Contents of the invention [0004] The main purpose of the embodiments of the present invention is to provid...

Claims

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Application Information

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IPC IPC(8): H01M4/02H01M4/13H01M4/70H01M50/531
CPCH01M4/02H01M4/13H01M4/70H01M50/531H01M2004/028Y02E60/10
Inventor 王洛
Owner ZHUHAI COSMX BATTERY CO LTD
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