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Non-aqueous electrolyte solution, and non-aqueous-electrolyte secondary cell using same

A non-aqueous electrolyte, secondary battery technology, applied in non-aqueous electrolyte batteries, secondary batteries, non-aqueous electrolytes, etc., can solve the problems of battery stability decline, battery capacity reduction, deterioration, etc. Excellent effect of discharge load characteristics

Active Publication Date: 2017-09-26
MITSUBISHI CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] If the lithium-ion secondary battery is repeatedly charged and discharged, the electrolyte will be decomposed on the electrodes or the materials constituting the battery will deteriorate, and the capacity of the battery will decrease.
In addition, depending on the situation, there is a possibility that the stability against battery swelling or rupture may decrease.

Method used

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  • Non-aqueous electrolyte solution, and non-aqueous-electrolyte secondary cell using same
  • Non-aqueous electrolyte solution, and non-aqueous-electrolyte secondary cell using same
  • Non-aqueous electrolyte solution, and non-aqueous-electrolyte secondary cell using same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-1

[0323] Under a dry argon atmosphere, ethylene carbonate (hereinafter, EC), ethylmethyl carbonate (hereinafter, EMC) and diethyl carbonate (hereinafter, DEC) were mixed so as to be 30% by volume, 40% by volume, and 30% by volume, respectively. volume % to make LiPF 6 Dissolved in the non-aqueous solvent thus mixed, LiPF 6 The concentration was 1.2M, and 2% by mass of vinylene carbonate and 2% by mass of fluoroethylene carbonate were added. Further, 0.3% by mass of Compound 2-10 was added to prepare a non-aqueous electrolytic solution.

Embodiment 2-1

[0344] Under a dry argon atmosphere, ethylene carbonate (hereinafter, EC), ethylmethyl carbonate (hereinafter, EMC) and diethyl carbonate (hereinafter, DEC) were mixed so as to be 30% by volume, 40% by volume, and 30% by volume, respectively. volume % to make LiPF 6 Dissolved in the non-aqueous solvent thus mixed, LiPF 6 The concentration was 1.2M, and 2% by mass of vinylene carbonate, 2% by mass of fluoroethylene carbonate, and 1% by mass of adiponitrile were added. Furthermore, 0.3% by mass of Compound 2-10 was added to prepare a non-aqueous electrolyte solution. Except having used this non-aqueous electrolytic solution, it carried out similarly to Example 1-1, and produced the sheet-shaped battery.

Embodiment 3-1

[0354] Under a dry argon atmosphere, ethylene carbonate (hereinafter, EC), ethylmethyl carbonate (hereinafter, EMC) and diethyl carbonate (hereinafter, DEC) were mixed so as to be 30% by volume, 40% by volume, and 30% by volume, respectively. volume % to make LiPF 6 Dissolved in the non-aqueous solvent thus mixed, LiPF 6 The concentration was 1.2M, and 2% by mass of vinylene carbonate, 2% by mass of fluoroethylene carbonate, and 1% by mass of adiponitrile were added. Furthermore, 0.3% by mass of Compound 2-10 was added to prepare a non-aqueous electrolyte solution. Except having used this non-aqueous electrolytic solution, it carried out similarly to Example 1-1, and produced the sheet-shaped battery.

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Abstract

Provided are a non-aqueous electrolyte solution, and a non-aqueous-electrolyte secondary cell using the non-aqueous electrolyte solution, with which it is possible to produce a non-aqueous secondary cell in which the emission of gas when the cell is used in high-temperature environments is suppressed, the residual capacity of the cell is improved, and cycle characteristics are improved, the cell furthermore having exceptional discharge load characteristics (is capable of high-rate discharge). The non-aqueous electrolyte solution and the non-aqueous-electrolyte secondary cell using the same are provided. The non-aqueous electrolyte solution is used in a non-aqueous-electrolyte secondary cell provided with a positive electrode having a positive-electrode active material capable of storing and discharging metal ions, and a negative electrode having a negative-electrode active material capable of storing and discharging metal ions. The non-aqueous electrolyte solution is characterized by including a bismaleimide compound having a specified structure.

Description

technical field [0001] The present invention relates to a nonaqueous electrolytic solution and a nonaqueous electrolytic solution secondary battery using the electrolytic solution. Background technique [0002] With the rapid progress of electronic equipment, people's demand for higher capacity of secondary batteries is increasing, and non-aqueous electrolyte batteries such as lithium-ion secondary batteries with high energy density are widely used, and people are actively developing them. Research. [0003] An electrolyte used in a nonaqueous electrolyte battery is usually mainly composed of an electrolyte and a nonaqueous solvent. LiPF is being used as an electrolyte solution for lithium-ion secondary batteries 6 A non-aqueous electrolyte solution in which an electrolyte such as a cyclic carbonate is dissolved in a mixed solvent of a high permittivity solvent such as a cyclic carbonate and a low-viscosity solvent such as a chain carbonate. [0004] When the lithium ion ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0567
CPCH01M10/052H01M2300/0025H01M10/0567C07D207/452Y02E60/10H01M10/0569H01M2300/0034H01G11/58H01M10/0525H01M10/0568H01M2300/004
Inventor 大桥洋一
Owner MITSUBISHI CHEM CORP
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