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Nonaqueous electrolyte and nonaqueous electrolyte secondary battery using the same

A non-aqueous electrolyte and electrolyte technology, applied in the direction of non-aqueous electrolyte batteries, non-aqueous electrolytes, secondary batteries, etc., can solve the problems of reduced discharge load characteristics and high resistance

Active Publication Date: 2017-06-13
MITSUBISHI CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0027] However, when the above-mentioned compounds are contained in the electrolytic solution, although the effect of improving the storage characteristics and cycle characteristics is obtained to a certain extent, since a film with high resistance is formed on the negative electrode side, there is a problem that the discharge load characteristics especially decrease. question

Method used

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  • Nonaqueous electrolyte and nonaqueous electrolyte secondary battery using the same
  • Nonaqueous electrolyte and nonaqueous electrolyte secondary battery using the same
  • Nonaqueous electrolyte and nonaqueous electrolyte secondary battery using the same

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preparation example Construction

[1025]

[1026] The non-aqueous electrolyte solution 4 of the present invention is prepared by dissolving an electrolyte, a cyclic sulfone compound, "a compound having a viscosity coefficient of 1.5 mPa·s or less at 25°C", a specific compound, and "other compounds" optionally added. . When preparing the non-aqueous electrolytic solution 4, in order to reduce the water content of the electrolytic solution, it is preferable to pre-dehydrate each raw material. Usually, it can be dehydrated to 50 ppm or less, preferably to 30 ppm or less, particularly preferably to 10 ppm or less. In addition, dehydration, deacidification treatment, etc. may be performed after preparing the electrolyte.

[1027] In the non-aqueous electrolyte battery, the non-aqueous electrolyte solution 4 of the present invention is preferably used as an electrolyte solution in secondary battery applications, for example, lithium secondary battery applications. Next, the non-aqueous electrolyte battery 4 using the...

Embodiment approach 5-1

[1045] The non-aqueous electrolyte solution 5 of the present invention contains a lithium salt and a non-aqueous organic solvent that dissolves the lithium salt. The non-aqueous organic solvent contains a cyclic polyamine compound and / or a cyclic polyamide compound, and further contains at least one compound selected from the group consisting of unsaturated carbonate, fluorine-containing carbonate, monofluorophosphate and difluorophosphate . This is referred to as "Embodiment 5-1".

[1046] [1. Cyclic polyamine compound]

[1047] [1-1. Type]

[1048] The cyclic polyamine compound contained in the non-aqueous electrolyte solution 5 of the present invention (hereinafter, appropriately referred to as "the cyclic polyamine compound of the present invention 5") is a cyclic compound having a structure formed by condensation of amines and their derivatives Things. That is, a cyclic compound in which a plurality of nitrogen atoms are bonded via an alkylene group, and a derivative in whic...

Embodiment approach 5-2

[1138] In addition, another main purpose of the present invention 5 is a non-aqueous electrolyte solution containing a lithium salt and a non-aqueous organic solvent that dissolves the lithium salt, wherein the non-aqueous organic solvent contains a cyclic polyamine compound, and is compared to all non-aqueous electrolytic solutions. The liquid contains 5-40% by mass of cyclic carbonate. This is referred to as "Embodiment 5-2".

[1139] [1. Cyclic polyamine compound]

[1140] [1-1. Type]

[1141] Same as above.

[1142] [1-2. Composition]

[1143] Same as above.

[1144] [2. Cyclic Carbonate]

[1145] The cyclic carbonate referred to in the present invention 5 is not particularly limited as long as it is a cyclic carbonate, and part or all of its hydrogen atoms may be substituted with halogens such as fluorine and chlorine. If you want to give examples, you can cite ethylene carbonate, propylene carbonate, butylene carbonate, fluoroethylene carbonate, difluoroethylene carbonate, fluoro...

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Abstract

An object is to provide a nonaqueous electrolyte and a nonaqueous-electrolyte secondary battery which have excellent discharge load characteristics and are excellent in high-temperature storability, cycle characteristics, high capacity, continuous-charge characteristics, storability, gas evolution inhibition during continuous charge, high-current-density charge / discharge characteristics, discharge load characteristics, etc. The object has been accomplished with a nonaqueous electrolyte which comprises: a monofluorophosphate and / or a difluorophosphate; and further a compound having a specific chemical structure or specific properties.

Description

[0001] This application is a division of the application with the filing date of April 4, 2008, the application number being 201510207936.6, and the invention title of "non-aqueous electrolyte for secondary batteries and non-aqueous electrolyte secondary batteries using the non-aqueous electrolyte" Application. Technical field [0002] The present invention relates to a non-aqueous electrolyte for a secondary battery and a secondary battery using the non-aqueous electrolyte. Specifically, the present invention relates to a non-aqueous electrolyte for a lithium secondary battery containing specific components and the use of the non-aqueous electrolyte Lithium secondary battery. Background technique [0003] <Non-aqueous electrolyte 1, non-aqueous electrolyte secondary battery 1> Corresponds to claims 1-8, 13, 14, 39-41 [0004] In recent years, with the miniaturization of electronic equipment, the demand for higher capacity of secondary batteries has been increasing, and lithi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0567H01M10/0569H01M4/134H01M4/587H01M10/0525H01M10/052
CPCH01M4/134H01M4/587H01M10/0525H01M10/0567H01M10/0569H01M2300/0025Y02E60/10Y02P70/50
Inventor 德田浩之藤井隆古田土稔竹原雅裕大贯正道大桥洋一木下信一
Owner MITSUBISHI CHEM CORP
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