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Positive electrode of nonaqueous electrolyte battery and nonaqueous electrolyte secondary battery

一种非水电解液、正极的技术,应用在非水电解液二次电池领域,能够解决充放电容量降低等问题,达到防止短路、高安全性、高使用效率的效果

Active Publication Date: 2017-07-14
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 of nonaqueous electrolyte battery and nonaqueous electrolyte secondary battery
  • Positive electrode of nonaqueous electrolyte battery and nonaqueous electrolyte secondary battery
  • Positive electrode of nonaqueous electrolyte battery and nonaqueous electrolyte secondary battery

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Embodiment Construction

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

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

[0029] In the present invention, a description is given taking a lithium ion secondary battery as an example. Furthermore, 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 a battery electrode in which the active material layer is formed only on one side of the current collector, and It is possible to form active material l...

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Abstract

[Problem] To provide a positive electrode of a non-aqueous electrolyte battery which avoids internal short circuit and has a large charge and discharge capacity, and a battery using the positive electrode. [Solution] A positive electrode of a non-aqueous electrolyte battery, comprising: a positive current collector; a coating film of a positive active material formed on the current collector; an uneven region formed along an end of the coating film, wherein The thickness variation of the positive electrode active material; and the protruding insulators erected on the non-uniform region and a part of the surface of the current collector adjacent to the non-uniform region, the protruding insulators erected on the surface of the non-uniform region are independent from each other and in a sufficiently low configuration The density is arranged to allow movement of battery reactant species across the surface of the non-uniform region. The protruding insulators standing on a part of the surface of the current collector are arranged at an arrangement density higher than that of the protruding insulators standing on the surface of the uneven region. There is also provided a non-aqueous electrolyte secondary battery using the above positive electrode.

Description

technical field [0001] The present invention relates to, for example, a positive electrode of a nonaqueous electrolyte battery such as a lithium ion secondary battery, and a nonaqueous electrolyte secondary battery using the positive electrode. Background technique [0002] In a non-aqueous electrolyte secondary battery such as a lithium ion secondary battery, a positive electrode and a negative electrode are laminated with a separator interposed therebetween. Therefore, in order to prevent a short circuit due to contact between positive and negative electrodes 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 positive and negative electrodes during charge and discharge, resulting in a decrease in charge and discharge capacity. [0003] Under such circumstances, some proposals have been made to achieve prevention of shor...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/13H01M2/26H01M10/052H01M10/0566H01M10/0585H01M50/466
CPCH01M4/13H01M4/139H01M2004/028H01M10/052H01M50/466H01M4/0404H01M4/0409H01M10/058Y02E60/10H01M50/46Y02P70/50H01M10/0525
Inventor 太田智行浮田明生阿南隆由
Owner ENVISION AESC ENERGY DEVICES LTD
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