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Solid or gel electrolyte and cells using same

A gel electrolyte and solid technology, applied in the direction of non-aqueous electrolyte battery, non-aqueous electrolyte battery electrode, electrolyte immobilization/gelation, etc., can solve the problems of charging/discharging efficiency or charging/discharging characteristics deterioration

Inactive Publication Date: 2007-08-29
SONY CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a result, charge / discharge efficiency or charge / discharge characteristics are also deteriorated

Method used

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  • Solid or gel electrolyte and cells using same
  • Solid or gel electrolyte and cells using same
  • Solid or gel electrolyte and cells using same

Examples

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Effect test

no. 1 example

[0029] Fig. 1 shows a planar structure of a battery according to a first embodiment of the present invention. Fig. 2 is a cross-sectional structure cut along line A-A in Fig. 1 . A battery is obtained by encapsulating a battery unit 20 to which a positive electrode lead 11 and a negative electrode lead 12 are connected in an external chamber 30 . The battery device 20 has a structure in which a positive electrode 21 and a negative electrode 22 are laminated with a separator 23 with an electrolyte interposed therebetween.

[0030] The composition of the positive electrode 21 is, for example, a positive electrode mixture layer 21a and a positive electrode current collector layer 21b. The positive electrode mixture layer 21a is placed on the side of the positive electrode collector layer 21b. Although not shown in the drawings, the positive electrode mixture layer 21a may be placed on both sides of the positive electrode collector layer 21b. Positive electrode collector layer ...

no. 2 example

[0064] Fig. 3 shows a cross-sectional structure of a battery according to a second embodiment of the present invention. FIG. 3 corresponds to a sectional structure cut along line A-A in FIG. 1 . The battery has the same configuration, reaction, and effect as those of the first embodiment, except that the battery contains electrolyte 41 instead of that of the first embodiment battery, and the battery does not contain a separator. Therefore, the same numerals and signs are used for the same structural elements and detailed descriptions are omitted.

[0065] The electrolyte 41 is a so-called high-polymer solid electrolyte and contains, for example, at least carboxylic acid or carboxylate, a high polymer, and a lithium salt as an electrolyte salt. In other words, it is the same as the electrolyte of the first embodiment except that the plasticizer is not included. As the high polymer, a high polymer having ion conductivity can be used other than that described in the first embod...

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Abstract

Disclosed is an electrolyte capable of obtaining an excellent quality of electrolyte, and a battery using the electrolyte. A battery device in which a positive electrode and a negative electrode are stacked with a separator being interposed therebetween is enclosed inside an exterior member. The separator is impregnated with an electrolyte. The electrolyte contains a high polymer, a plasticizer, a lithium and at least either carboxylic acid or carboxylate. Therefore, when preparing a high polymer by means of polymerization of monomers, the polymerization of monomers can be smoothly processed even if there is a factor for inhibiting reaction such as copper. As a result, the amount of non-reacted monomers remained in the electrolyte can be suppressed to be extremely small. Therefore, decomposition and reaction of monomers are suppressed even after repeating charging / discharging, so that the deterioration in the charging / discharging efficiency and the charging / discharging characteristic can be prevented.

Description

technical field [0001] The present invention relates to electrolytes comprising electrolyte salts and batteries using the same. Background technique [0002] Recently, according to the development of electronic technology, many miniaturized portable electronic devices such as VTRs (video tape recorders) with built-in cameras, cellular phones and notebook computers have been widely used, and the miniaturization and light weight of these devices has become the object of research. Batteries, particularly secondary batteries, are under development as portable power sources for these devices. In particular, lithium ion secondary batteries have attracted attention because the batteries can achieve high energy density. In particular, thin cells that can be folded and have highly variable morphological characteristics are being actively researched and developed. [0003] In batteries with highly variable morphological characteristics, for example, solid electrolytes are used with...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/40H01B1/12C07C69/00H01B1/06H01M4/13H01M4/133H01M10/05H01M10/0525H01M10/0565H01M10/0567
CPCH01M10/0565H01M10/0525Y02E60/12H01M2300/0085Y02E60/122Y02E60/10
Inventor 毛冢浩一郎远藤贵弘
Owner SONY CORP
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