Lithium ion battery pole part, preparation method thereof and lithium ion battery

A lithium-ion battery and pole piece technology, which is used in battery electrodes, electrode manufacturing, electrode collector coating, etc., can solve the problem that the gel electrolyte cannot infiltrate the pole piece.

Active Publication Date: 2020-06-26
BEIJING XIAOMI MOBILE SOFTWARE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In order to solve the above-mentioned various problems caused by the inability of the gel state electrolyte to infiltr...

Method used

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  • Lithium ion battery pole part, preparation method thereof and lithium ion battery
  • Lithium ion battery pole part, preparation method thereof and lithium ion battery
  • Lithium ion battery pole part, preparation method thereof and lithium ion battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0087] Example 1 Preparation of Lithium-ion Battery Positive Electrode ①

[0088] The porous material involved in this embodiment is microporous ceramics; the electrode material is positive electrode material. The positive electrode material is lithium cobalt oxide. The gel electrolyte is a gel electrolyte for lithium ion batteries.

[0089] 1) Prepare the mixed membrane material for the upper and lower layers of the electrolyte storage layer;

[0090] 2) Coating the mixed membrane material for preparing the lower layer in step 1) on the surface of the current collector, heat-treating the lower layer, and cooling down;

[0091] 3) The upper layer prepared in step 1) is cooled with the mixed membrane material, and then coated on the surface of the lower layer of the pole piece obtained in step 2), left to stand and dried.

[0092] Step 1) The preparation of the mixed membrane material for the lower layer of the electrolyte layer includes: a porous material, an electrode mate...

Embodiment 2

[0109] Example 2 Preparation of Lithium-ion Battery Negative Electrode ①

[0110] The steps and parameters not mentioned in this embodiment are the same as in Embodiment 1. The involved porous material is microporous ceramics; the electrode material is negative electrode material. The negative electrode material is carbon nanotubes. The gel electrolyte is the same as in Example 1.

[0111] 1) Prepare the mixed membrane material for the upper and lower layers of the electrolyte storage layer;

[0112] 2) Coating the mixed membrane material for preparing the lower layer in step 1) on the surface of the current collector, heat-treating the lower layer, and cooling down;

[0113] 3) The upper layer prepared in step 1) is cooled with the mixed membrane material, and then coated on the surface of the lower layer of the pole piece obtained in step 2), left to stand and dried.

[0114]Step 1) The preparation of the mixed membrane material for the lower layer of the electrolyte lay...

Embodiment 3

[0131] Example 3 Preparation of Lithium-ion Battery Positive Electrode ②

[0132] The porous material involved in this embodiment is macroporous alumina; the electrode material is positive electrode material. The positive electrode material is lithium iron phosphate. The gel electrolyte is a gel electrolyte for lithium ion batteries.

[0133] 1) Prepare the mixed membrane material for the upper and lower layers of the electrolyte storage layer;

[0134] 2) Coating the mixed membrane material for preparing the lower layer in step 1) on the surface of the current collector, heat-treating the lower layer, and cooling down;

[0135] 3) The upper layer prepared in step 1) is cooled with the mixed membrane material, and then coated on the surface of the lower layer of the pole piece obtained in step 2), left to stand and dried.

[0136] Step 1) The preparation of the mixed membrane material for the lower layer of the electrolyte layer includes: a porous material, an electrode mat...

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Abstract

The invention discloses a lithium ion battery pole part, a preparation method thereof and a lithium ion battery, and relates to the technical field of lithium ion battery preparation. The battery polepart comprises a current collector and an electrolyte storage layer, and the electrolyte storage layer is a film layer which is located on the surface of the current collector and contains a porous material, an electrode material and a gel-state electrolyte. When the pole part is used for preparing a lithium ion battery with a gel-state electrolyte, the energy density and the charging speed of the lithium ion battery can be directly improved.

Description

technical field [0001] The invention relates to the technical field of lithium ion battery preparation, in particular to a lithium ion battery pole piece, a preparation method thereof and a lithium ion battery. Background technique [0002] Lithium-ion batteries are widely used in various fields of today's social life because of their high voltage, high specific energy, long cycle life, good safety performance, small self-discharge, and fast charging speed. The essence of lithium-ion battery is a secondary battery, that is, a rechargeable battery. The charging and discharging process mainly depends on Li + Move between positive and negative poles to work: when charging, the Li + Deintercalation from the positive electrode, moving through the electrolyte to the negative electrode diaphragm, and then intercalating the negative electrode, after charging, the negative electrode is in a lithium-rich state; when discharging, the above process is reversed, the same is Li + Both ...

Claims

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Application Information

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IPC IPC(8): H01M4/131H01M4/133H01M4/1391H01M4/1393H01M4/04H01M10/0525
CPCH01M4/0404H01M4/131H01M4/133H01M4/1391H01M4/1393H01M10/0525Y02E60/10
Inventor 高锃
Owner BEIJING XIAOMI MOBILE SOFTWARE CO LTD
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