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Secondary-battery current collector foil and method of manufacturing the same

A secondary battery, collector foil technology, applied in battery electrodes, electrode manufacturing, electrode carriers/current collectors, etc., can solve the problems of carbon film layer defects, coating peeling, etc.

Inactive Publication Date: 2011-04-27
TOYOTA JIDOSHA KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

According to this method, the adhesive force at the time of manufacturing the current collector foil can be improved; however, in the actual use environment, the carbon thin film layer may have defects such as pinholes
Therefore, aluminum oxide film is gradually formed from defects, and as a result, the coating may be peeled off

Method used

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  • Secondary-battery current collector foil and method of manufacturing the same
  • Secondary-battery current collector foil and method of manufacturing the same
  • Secondary-battery current collector foil and method of manufacturing the same

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Embodiment Construction

[0034] Hereinafter, embodiments of the present invention will be described. Note that in the description, based on the prior art in the relevant field, matters other than the subject matter (for example, a method of manufacturing an electrode active material, preparation of a slurry containing an electrode active material) that are specifically cited but are necessary for carrying out the present invention The method of the composite, conventional techniques for forming lithium secondary batteries or other batteries, etc.) should be understood as a matter of design to those skilled in the art. The present invention is implemented based on the contents disclosed in this specification and technical knowledge in the related field.

[0035] The secondary battery current collector foil disclosed herein includes a conductive metal foil element, a metal interlayer formed on the metal foil element, and a carbon thin film layer deposited on the metal interlayer. A metal interlayer is ...

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Abstract

A secondary-battery current collector foil (X) includes: an electrically conductive metal foil element (1); a metal intermediate layer (2) formed on the metal foil element (1); and a carbon thin film layer (3) deposited on the metal intermediate layer (2). The metal intermediate layer (2) is formed between the metal foil element (1) and the carbon thin film layer (3) so that the metal intermediate layer (2) closely adheres to both the metal foil element (1) and the carbon thin film layer (3). The metal intermediate layer maybe made of Ri, Nb, Ta,. Zn, Hf, W, Cu, Ni, and formed through metal vapor-deposition.

Description

technical field [0001] The present invention relates to a current collector foil, which is a component of an electrode element, used in a secondary battery such as a lithium ion battery, and a method of manufacturing the same. Background technique [0002] In recent years, secondary batteries such as lithium-ion batteries, nickel-metal hydride batteries, and the like have become more important as vehicle power supplies or power supplies for personal computers and cellular phones. In particular, lithium secondary batteries such as lithium ion batteries are light in weight and have high energy density, so they are expected to be suitably used as high-power vehicle-mounted power sources. [0003] In a lithium ion battery, lithium ions are exchanged between a positive electrode made of a positive electrode active material and a negative electrode made of a negative electrode active material to charge and discharge the battery. This type of secondary battery typically includes a...

Claims

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Application Information

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IPC IPC(8): H01M4/66H01M4/04
CPCH01M4/0426H01M4/0423H01M4/663H01M4/661H01M4/0421Y02E60/12Y02E60/10
Inventor 内田陽三
Owner TOYOTA JIDOSHA KK