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Electrode plate and manufacturing method thereof, and electrochemical device

An electrode pole piece and manufacturing method technology, applied in electrode manufacturing, electrochemical generator, electrode current collector coating, etc., can solve problems such as unsatisfactory effect, reduce the risk of lithium precipitation, prolong service life, and improve power performance effect

Inactive Publication Date: 2019-12-03
RISESUN MENGGULI NEW ENERGY SCIENCE & TECHNOLOGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, the problem of battery lithium analysis is generally solved from the aspects of battery design, adjustment of battery N / P, or control of battery charge and discharge depth. Although these methods reduce the risk of battery lithium analysis to a certain extent, the effect is not ideal.

Method used

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  • Electrode plate and manufacturing method thereof, and electrochemical device
  • Electrode plate and manufacturing method thereof, and electrochemical device
  • Electrode plate and manufacturing method thereof, and electrochemical device

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Embodiment Construction

[0032] By changing the traditional coating method, the present invention coats two materials with different properties on the current collector in layers, so that the surface layer has the ability to quickly deintercalate lithium ions, reduce the risk of lithium precipitation on the surface of the pole piece, and improve the safety performance of the battery , extending the battery life, but also improve the power performance of the battery. The present invention will be described in detail below with reference to the specific embodiments and the accompanying drawings, but the embodiments in the application documents should not be construed as limitations on the application documents.

[0033] like Figure 1-2 As shown, the present invention provides an electrode pole piece, including a current collector, which plays the role of transferring electrons; in this embodiment, the current collector is preferably selected from copper foil and tin foil with excellent electrical condu...

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Abstract

The invention discloses an electrode plate and a manufacturing method thereof, and an electrochemical device. The electrode plate comprises a current collector and further comprises active substance layers symmetrically arranged on the upper surface and the lower surface of the current collector respectively, and second active material layers respectively arranged on the first active material layers; and the current collector at the edges of the second active material layers forms a tab. By changing a traditional coating mode, two materials with different properties are coated on the current collector in a layered manner, so that the surface layer of the current collector has the capability of quickly removing and embedding lithium ions, the risk of lithium precipitation on the surface ofa pole piece is reduced, the safety performance of the battery is improved, the service life of the battery is prolonged, and the power performance of the battery is also improved.

Description

technical field [0001] The invention relates to the technical field of batteries, in particular to an electrode pole piece, a method for manufacturing the electrode pole piece and an electrochemical device. Background technique [0002] With the development of new energy vehicles, lithium-ion batteries are widely used in energy storage, portable electronic products, electric vehicles and other products due to their high energy density, no memory performance, environmental friendliness and other excellent properties. [0003] However, with the large-scale promotion of lithium-ion batteries, more and more problems have been exposed, such as the problem of lithium precipitation in the negative electrode, which will not only lead to the loss of battery energy, reduce the service life, but also lead to lithium branches. The growth of crystals may also pierce the separator and cause a short circuit in the battery, causing danger. Therefore, solving the problem of lithium depositi...

Claims

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Application Information

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IPC IPC(8): H01M4/133H01M4/134H01M4/1393H01M4/1395H01M4/04H01M10/0525
CPCH01M4/0404H01M4/133H01M4/134H01M4/1393H01M4/1395H01M10/0525H01M2004/027Y02E60/10
Inventor 周宾韩志松孙小嫚吴宁宁
Owner RISESUN MENGGULI NEW ENERGY SCIENCE & TECHNOLOGY CO LTD
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