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Lithium ion battery pole piece, production method and battery cell

A lithium-ion battery and pole piece technology is applied in the manufacture of electrolyte batteries, non-aqueous electrolyte battery electrodes, secondary batteries, etc., to achieve the effect of inhibiting the growth of lithium dendrites and improving thermal safety.

Active Publication Date: 2018-06-29
成都特隆美储能技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The surface of the functional coating or the surface of the positive electrode is coated with a second ceramic coating

Method used

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  • Lithium ion battery pole piece, production method and battery cell
  • Lithium ion battery pole piece, production method and battery cell

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The functional coating consists of the following parts by weight: 5 parts of metal lithium compound powder, 1 part of binder, 10 parts of leveling agent and 1 part of water.

Embodiment 2

[0034] The functional coating consists of the following parts by weight: 50 parts of metal lithium compound powder, 25 parts of binder, 80 parts of leveling agent and 0 part of water.

Embodiment 3

[0036] The functional coating consists of the following parts by weight: 10 parts of metal lithium compound powder, 15 parts of binder, 20 parts of leveling agent and 8 parts of water.

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Abstract

The invention provides a lithium ion battery pole piece, a production method and a battery cell. The pole piece comprises a positive pole piece and a negative pole piece which are arranged in an overlapping manner; the negative pole piece comprises a negative pole piece body as well as a first ceramic coating and a functional coating which are sequentially coated in a direction from a body to theouter part; the surface of the functional coating or the surface of the positive pole piece is coated with a second ceramic coating; the functional coating is prepared by mixing metal lithium complexpowder, an adhesive, a flatting agent and water. The invention has the advantages that thermal safety of the battery can be improved and the growth of lithium dendrites is inhibited; the functional coating only participates in an electrochemical reaction when the lithium dendrites are grown and does not participate in the electrochemical reaction when the battery cell normally discharges, so thatno special electrolyte is needed and the cost is effectively reduced.

Description

technical field [0001] The invention relates to the technical field of batteries, in particular to a lithium-ion battery pole piece, a manufacturing method, and a battery cell. Background technique [0002] At present, lithium-ion batteries are widely used. Commercial lithium batteries usually use polyolefin-based organic polymer polymer separators. Lithium-ion batteries using graphite and silicon-carbon anode materials tend to generate lithium dendrites on the surface of the anode after low-temperature charging, high-rate charging, and long-term cycling. The crystal pierces the diaphragm and causes a short circuit in the cell and thermal runaway, and the existing polyolefin polymer separator is not resistant to high temperatures, and is prone to shrinkage at high temperatures, which will also lead to thermal runaway of the cell. [0003] The current lithium-ion battery polymer separator is easy to shrink at high temperature, easily pierced by lithium dendrites, and has a l...

Claims

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Application Information

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IPC IPC(8): H01M10/0525H01M4/13H01M10/058H01M10/42
CPCH01M4/13H01M10/0525H01M10/058H01M10/4235Y02E60/10Y02P70/50
Inventor 黄国素蒲彦宁邹才华
Owner 成都特隆美储能技术有限公司
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