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Rolled copper foil and negative electrode of lithium ion secondary battery using same

A secondary battery, rolled copper foil technology, applied in secondary batteries, battery electrodes, electrode carriers/current collectors, etc., can solve the problem of inability to obtain high adhesion, complex structure, rough The problems such as the weakening of the fixation effect of the chemical particles, and the effect of improving the long life, improving the volume energy density, and improving the safety are achieved.

Inactive Publication Date: 2013-01-30
SH COPPER PROD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In these patent documents, in the above-mentioned patent document 1, in order to solve the problem that the fixation effect of uneven and high-roughened roughened particles is weakened, and high adhesion between the negative electrode current collector and the negative electrode active material cannot be obtained , the method of implementing multiple plating treatments or reflow treatments is adopted to have a complex structure on the surface of copper foil by using roughened particles with low roughness

Method used

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  • Rolled copper foil and negative electrode of lithium ion secondary battery using same
  • Rolled copper foil and negative electrode of lithium ion secondary battery using same
  • Rolled copper foil and negative electrode of lithium ion secondary battery using same

Examples

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Effect test

Embodiment 1～26、 comparative example 1～12

[0086] Using oxygen-free copper as the base material, smelting Figure 6 and Figure 7 The alloys shown are composed of copper alloys, cast in ingots. The ingot is hot-rolled to form a sheet, and after the sheet is cold-rolled and billet annealed in the order, the final cold-rolling is performed at a working degree of 85 to 95% to make the thickness 10 μm, thereby obtaining Examples 1 to 26 and Rolled copper foil of Comparative Examples 1-12.

[0087]

[0088] The content of each evaluation is as follows.

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Abstract

The invention relates to rolled copper foil and a negative electrode of lithium ion secondary battery using the same. The rolled copper foil not only is of high intensity, high heat resistance, high conductive rate and good processing ability and the like, and has high tightness of the resin contained in a negative electrode active material layer without applying coarse processing such as plating of electro-deposition particles on a surface of the copper foil. The rolled copper foil is characterized by comprising a main component of Cu, adding elements A containing one or more elements atomic radius is smaller than that of the Cu, and copper alloy containing unavoidable impurities, wherein variation of the atomic distance is below -0.002pm when a total of (atomic radius difference of each adding element of the adding element A and the Cu) plus (atom% of each adding element) is taken as the variation of atom distance caused by the adding element, and a total quantity of the adding element A is below 1.0 weight%.

Description

technical field [0001] The present invention relates to a current collector suitable for a lithium ion secondary battery, a rolled copper foil having excellent resin adhesion, and a lithium ion secondary battery negative electrode using the rolled copper foil. Background technique [0002] Lithium-ion secondary batteries are used as batteries for electronic devices such as mobile PCs and mobile terminals because they can obtain high voltage and high energy density, and are also active in many organizations as driving batteries for automobiles conduct research and development. [0003] The basic structure of lithium-ion secondary batteries is that lithium ions in the electrolyte move between positive and negative plates insulated by a separator to repeatedly charge and discharge. It is important to find an electrolyte that can realize this structure with high cycle characteristics, Materials for separator, positive and negative plates. [0004] A negative electrode plate us...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C9/00H01M4/66H01M4/134
CPCY02E60/122Y02E60/10C22C9/00C22C9/01C22C9/02C22C9/04C22C9/05C22C9/06C22C9/10H01M4/662H01M10/0525
Inventor 泽井祥束岩崎富生
Owner SH COPPER PROD CO LTD
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