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Electrochemical device electrode, electrochemical device, and manufacturing method for said electrode and said device

An electrochemical and device technology, applied in the field of electrodes for electrochemical devices, to achieve the effect of reducing discarded parts

Inactive Publication Date: 2018-11-09
NEC ENERGY DEVICES LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The invention described in Patent Document 2 does not relate to the manufacture of an electrode having an active material layer formed on a current collector

Method used

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  • Electrochemical device electrode, electrochemical device, and manufacturing method for said electrode and said device
  • Electrochemical device electrode, electrochemical device, and manufacturing method for said electrode and said device
  • Electrochemical device electrode, electrochemical device, and manufacturing method for said electrode and said device

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Embodiment Construction

[0029] Exemplary embodiments of the present invention are described with reference to the drawings.

[0030] The structure of the secondary battery

[0031] Figure 1a with Figure 1b A schematic diagram of a secondary battery 1 as an example of the electrochemical device of the present invention is shown. Figure 1a is a plan view viewed from vertically above the main surface of the secondary battery 1, and Figure 1b is along Figure 1a A cross-sectional view taken along the line A-A. figure 2 is an enlarged view of the positive electrode 2, and image 3 is an enlarged view of the negative electrode 3 .

[0032] The secondary battery 1 of the present invention is provided with a multilayer electrode body 17 in which two types of electrodes (ie, positive electrodes and negative electrodes 3 ) are alternately layered on each other with a separator interposed therebetween. This multilayer electrode body 17 is accommodated together with the electrolytic solution 5 inside th...

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Abstract

Provided is an electrochemical device electrode 2 containing a current collector 9 and an active material layer 10 comprising an active material coated on the current collector 9, wherein the active material layer 10 includes a lower active material layer 10a closely bonded on the current collector 9, and an upper active material layer 10b disposed on the current collector 9 via the lower active material layer 10a. The lower active material layer 10a is thinner than the upper active material layer 10b. In the lengthwise direction of the current collector 9, the terminal part of the upper active material layer 10b is either coincident with the terminal part of the lower active material layer 10a or is positioned before the terminal part of the lower active material layer 10a.

Description

technical field [0001] The present invention relates to an electrode for an electrochemical device, an electrochemical device, and a method for manufacturing the electrode for an electrochemical device and the electrochemical device. Background technique [0002] Secondary batteries are a typical type of electrochemical device widely used as power sources for cellular phones, digital cameras, laptop computers, electric vehicles, and home energy storage systems. Electrochemical devices can be broadly classified into wound type and stacked type. The wound electrochemical device has a structure in which a pair of long positive and negative electrode sheets are wound with a separator interposed therebetween and stacked on each other. In contrast, a stacked electrochemical device has a configuration in which pairs of electrode sheets, that is, a plurality of positive electrode sheets and a plurality of negative electrode sheets are alternately stacked on each other with a separa...

Claims

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Application Information

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IPC IPC(8): H01M4/02H01G11/26H01M4/04H01M4/13H01M4/139H01M10/052H01M10/0566H01M10/058
CPCH01G11/26H01M4/13H01M4/139H01M4/0404H01M4/0409H01M2004/021H01M4/366H01G11/86Y02E60/10Y02P70/50H01G11/28H01G11/52H01G11/60H01G11/68H01G11/78H01M10/049H01M10/0585
Inventor 平井政则佐藤健治
Owner NEC ENERGY DEVICES LTD
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