Nonaqueous electrolyte secondary battery and method for manufacturing same

A non-aqueous electrolyte, secondary battery technology, applied in non-aqueous electrolyte storage batteries, electrolyte storage battery manufacturing, secondary batteries and other directions, can solve the problems of not being able to miniaturize batteries, unable to form secondary batteries, etc., and achieve battery performance improvement, Excellent gravimetric energy density and effect of suppressing deterioration

Inactive Publication Date: 2015-08-12
NITTO DENKO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in general, a secondary battery having a conductive polymer as a positive electrode active material is an anion mobile type in which anions are doped into the polymer of the positive electrode during charging, and the anions are dedoped from the polymer of the positive electrode during discharge. Therefore, the rocking chair type secondary battery as described above cannot be constituted.
Therefore, a nonaqueous electrolyte secondary battery using a conductive polymer as a positive electrode active material basically requires a large amount of electrolyte, and as a result, there is a problem that it cannot contribute to the miniaturization of the battery.

Method used

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  • Nonaqueous electrolyte secondary battery and method for manufacturing same
  • Nonaqueous electrolyte secondary battery and method for manufacturing same
  • Nonaqueous electrolyte secondary battery and method for manufacturing same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0136]

[0137] A laminate was assembled using the positive electrode I, the negative electrode, and the separator. Specifically, the above-mentioned positive electrode I and the negative electrode were laminated so that two separators were arranged between them to obtain a laminated body. After putting the laminated body into an aluminum laminate package, it was vacuum-dried at 80° C. for 2 hours with a vacuum dryer. Next, an electrolytic solution is injected into the vacuum-dried package. As the electrolytic solution, an electrolytic solution obtained by adding vinylene carbonate (VC) as an electrolytic solution additive in a ratio of 2 parts by weight to 100 parts by weight of the electrolytic solution i prepared above was used. Finally, the package was sealed to obtain the non-aqueous electrolyte secondary battery of Example 1. In addition, the injection into the package was performed in a glove box under an ultra-high-purity argon atmosphere. The dew point in the glo...

Embodiment 2～16、 comparative example 1～5

[0139] The positive electrode, the electrolytic solution, the type of additive for the electrolytic solution, and the additive amount of the additive for the electrolytic solution (negative electrode film-forming agent) were substituted as shown in Tables 1 to 5 described later. Except for this, a laminated battery (nonaqueous electrolyte secondary battery) was fabricated in the same manner as in Example 1.

[0140] The gravimetric energy density was measured according to the following reference|standard about the nonaqueous electrolyte solution secondary battery of the Example and the comparative example obtained in this way. The results are collectively shown in Tables 1 to 5 described later.

[0141] "Determination of gravimetric energy density"

[0142] The non-aqueous electrolyte secondary battery was placed in a constant temperature bath at 25° C., and the measurement was performed in a constant current-constant voltage charge / constant current discharge mode using a bat...

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Abstract

This nonaqueous electrolyte secondary battery is provided with a positive electrode and a negative electrode, a separator positioned between the positive electrode and the negative electrode, and an electrolyte solution containing a supporting electrolyte that conducts ions. The positive electrode contains a conductive polymer. The negative electrode contains a carbonaceous material in which ions can be inserted and desorbed. The electrolyte solution contains a negative electrode film-forming agent. Consequently, the nonaqueous electrolyte secondary battery, which uses the conductive polymer in the positive electrode and the carbonaceous material in the negative electrode, has excellent gravimetric energy density, and effectively minimizes deterioration of battery performance.

Description

technical field [0001] The present invention relates to a nonaqueous electrolyte secondary battery and a method for producing the same, and in detail, relates to a nonaqueous electrolyte secondary battery that is excellent in gravimetric energy density and effectively suppresses deterioration of battery performance, and a method for producing the same. Background technique [0002] In recent years, with the advancement and development of electronic technology in portable PCs, mobile phones, and portable data terminals (PDAs), secondary batteries that can be repeatedly charged and discharged have been widely used as power storage devices for these electronic devices. [0003] In such a lithium secondary battery, a lithium-containing transition metal oxide such as lithium manganese oxide and lithium cobalt oxide is used as an electrode active material for the positive electrode, and a carbonaceous material that can intercalate and deintercalate lithium ions is used for the nega...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/052H01M4/137H01M4/60H01M4/62H01M10/0567H01M10/0568H01M10/058
CPCH01M10/0568H01M4/366H01M4/137Y02E60/122H01M10/0567H01M10/058H01M4/602H01M10/0525Y02T10/7011H01M4/62H01M10/052Y02E60/10Y10T29/4911Y02P70/50H01M4/364H01M4/587H01M2220/30H01M2300/0025Y02T10/70
Inventor 武弘义加治佐由姬阿部正男植谷庆裕
Owner NITTO DENKO CORP
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