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Lithium secondary battery

一种锂二次电池、负极活性物质的技术，应用在锂蓄电池、电池、电池电极等方向，能够解决电池容量劣化等问题，达到容量劣化抑制的效果

Active Publication Date: 2015-05-06
TOYOTA JIDOSHA KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for example, Li ions tend to be irreversibly immobilized at the positive non-facing portion of the negative electrode (for example, the negative electrode surface). Therefore, if the Li ions move to the above-mentioned positive non-facing portion, the Li ions that should contribute to charging and discharging are captured. Irreversible fixation may degrade battery capacity

Method used

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Embodiment Construction

[0025] Below, while referring to the attached Figure 1 Embodiments of the present invention will be described. In addition, the dimensional relationship (length, width, thickness, etc.) in each drawing does not reflect the actual dimensional relationship. In addition, matters other than the matters particularly involved in this specification, necessary for the practice of the present invention (for example, the constitution and manufacturing method of the electrode body including the positive electrode and the negative electrode, the separator, the non-aqueous electrolyte (non-aqueous electrolytic solution) General techniques related to battery construction, such as configuration and manufacturing method, battery (case) shape, etc.), can be grasped as design matters by those skilled in the art based on the prior art in this field. The present invention can be implemented based on the contents disclosed in this specification and common technical knowledge in the field. In ad...

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Abstract

The present invention provides a lithium secondary battery having: a positive electrode containing a positive electrode active material layer; and a negative electrode containing a negative electrode active material layer. The positive electrode active material layer and the negative electrode active material layer are disposed so as to face one another. The negative electrode active material layer has a region (A) containing a positive electrode non-facing part which does not face the positive electrode active material layer. The region (A) contains a negative electrode active material, a hot-melt binding material, and a temperature-sensitive thickening agent. The melting point of the hot-melt binding material and the gelatinization temperature of the temperature-sensitive thickening agent are both within the range of 45 to 100°C.

Description

technical field [0001] The present invention relates to lithium secondary batteries. Specifically, it relates to a lithium secondary battery applicable to a vehicle-mounted power supply. Background technique [0002] Lithium secondary batteries are light in weight and can obtain high energy density, so they are preferably used as so-called portable power sources such as personal computers and portable terminals, and vehicle driving power sources. In particular, it is of high importance as a high-output power supply for driving vehicles such as electric vehicles and hybrid vehicles. In such a lithium secondary battery, charge and discharge are performed when lithium ions (Li ions) serving as charge carriers travel back and forth between positive and negative electrodes. However, for example, Li ions tend to be irreversibly immobilized at the positive non-facing portion of the negative electrode (for example, the negative electrode surface). Therefore, if the Li ions move to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/62H01M10/052H01M10/058
CPCH01M4/13H01M4/139H01M4/62H01M4/621H01M4/622H01M10/052H01M2220/20Y02E60/10Y02P70/50Y02T10/70
Inventor 桥本达也大原敬介横山友嗣福本友祐
Owner TOYOTA JIDOSHA KK
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