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Positive electrode for nonaqueous electrolyte battery, and nonaqueous electrolyte battery

A non-aqueous electrolyte and positive electrode technology, applied in the field of non-aqueous electrolyte secondary batteries, can solve problems such as the reduction of charge and discharge capacity, and achieve the effects of preventing short circuits, high safety, and high use efficiency

Active Publication Date: 2015-01-28
ENVISION AESC ENERGY DEVICES LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the insulating layer formed to prevent short circuits reduces the number of material movement paths between the positive and negative electrodes during charge and discharge, resulting in a decrease in charge and discharge capacity

Method used

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  • Positive electrode for nonaqueous electrolyte battery, and nonaqueous electrolyte battery
  • Positive electrode for nonaqueous electrolyte battery, and nonaqueous electrolyte battery
  • Positive electrode for nonaqueous electrolyte battery, and nonaqueous electrolyte battery

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Embodiment Construction

[0027] Hereinafter, the present invention will be described with reference to the drawings.

[0028] figure 1 It is a view illustrating an example of the positive electrode of the non-aqueous electrolyte battery according to the present invention. figure 1 A is a top view, and figure 1 B is along figure 1 A cross-sectional view of the line A-A' of A. figure 1 C is shown in zoom figure 1 A cross-sectional view of a part of the positive electrode active material layer of the positive electrode terminal of B.

[0029] In the present invention, a description is given taking a lithium ion secondary battery as an example. In addition, in the present invention, the active material layer is provided only on one side of the current collector to avoid complicated drawings; however, the present invention is not limited to battery electrodes in which the active material layer is formed only on one side of the current collector, and It is possible to form active material layers with the s...

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PUM

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Abstract

[Problem] To provide: a positive electrode to be used in a nonaqueous electrolyte battery and having a large charge / discharge capacity, and no risk of an internal short circuit; and a battery using the same. [Solution] A positive electrode to be used in a nonaqueous electrolyte battery and having a positive-electrode collector, a positive-electrode-active-material-coated film formed on the collector, a nonuniform region having a changing thickness of the positive-electrode active material formed along the edges of the coated film, and projecting-insulating parts projecting upward in the nonuniform region and in a part of the adjacent collector surface, wherein: the projecting-insulating parts projecting upward from the surface of the nonuniform region are positioned in a low-density arrangement enabling the movement of a battery-reaction material through the surface of the nonuniform region; and the projecting-insulating parts projecting upward from a part of the collector surface are positioned in a high-density arrangement, in comparison to the projecting-insulating parts projecting upward from the surface of the nonuniform region. Also, a nonaqueous electrolyte battery using the same.

Description

Technical field [0001] The present invention relates to a positive electrode of a non-aqueous electrolyte battery such as a lithium ion secondary battery, and a non-aqueous electrolyte secondary battery using the positive electrode. Background technique [0002] In a non-aqueous electrolyte secondary battery such as a lithium ion secondary battery, the positive electrode and the negative electrode are laminated with a separator in between. Therefore, in order to prevent a short circuit due to contact between the positive electrode and the negative electrode at the end of one electrode, an insulating layer is formed at the end of this electrode. However, the insulating layer formed to prevent short circuits reduces the number of material movement paths between the positive electrode and the negative electrode during charge and discharge, resulting in a decrease in charge and discharge capacity. [0003] In this case, some proposals have been made to prevent short circuits without c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/13H01M2/26H01M10/052H01M10/0566H01M10/0585H01M50/466
CPCY02E60/122H01M4/13H01M10/052H01M4/139H01M2004/028H01M50/466H01M4/0404H01M4/0409H01M10/058Y02E60/10H01M50/46Y02P70/50H01M10/0525
Inventor 太田智行浮田明生阿南隆由
Owner ENVISION AESC ENERGY DEVICES LTD
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