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Non-aqueous electrolyte solution, and lithium ion secondary battery having said non-aqueous electrolyte solution

A non-aqueous electrolyte and solution technology, applied in the direction of non-aqueous electrolyte batteries, non-aqueous electrolytes, secondary batteries, etc., can solve the problems of enlarging the size to make huge energy, high safety, etc., and achieve the effect of good capacity maintenance rate

Active Publication Date: 2015-11-25
ENVISION AESC ENERGY DEVICES LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Although lithium-ion secondary batteries can achieve high energy density, the enlarged size makes the energy huge, but requires high safety

Method used

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  • Non-aqueous electrolyte solution, and lithium ion secondary battery having said non-aqueous electrolyte solution
  • Non-aqueous electrolyte solution, and lithium ion secondary battery having said non-aqueous electrolyte solution
  • Non-aqueous electrolyte solution, and lithium ion secondary battery having said non-aqueous electrolyte solution

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0114] First, refer to figure 1 Production of the positive electrode 1 is described. 85% by mass LiMn as the positive electrode active material 2 o 4, 7% by mass of acetylene black as a conduction auxiliary material and 8% by mass of polyvinyl difluoride as a binder were mixed; N-methylpyrrolidone was added to the mixture, and further mixed to prepare a positive electrode slurry. The positive electrode slurry was applied on both surfaces of Al foil 2 with a thickness of 20 μm to become a current collector by the doctor blade method so that the thickness became 160 μm after the rolling process, dried at 120° C. for 5 minutes, and passed through the rolling process to thereby The positive electrode active material layer 14 is formed. A portion 5 to which no positive active is applied (on which no positive active is applied) is provided on either surface of the two end portions of the foil. The positive electrode conductive sheet 6 is provided on a portion 5 to which no posit...

Embodiment 2

[0124] In Example 2, a battery was fabricated and evaluated as in Example 1, except that it was prepared by mixing 10% by mass of tris(2,2,2-trifluoroethyl)phosphate (hereinafter, also referred to as PTTFE) other than non-aqueous electrolyte solutions.

Embodiment 3

[0126] In Example 3, a battery was produced and evaluated as in Example 1, except that a nonaqueous electrolyte solution was prepared by mixing 20% ​​by mass of PTTFE.

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Abstract

The exemplary embodiment has an object to provide a nonaqueous electrolyte solution having a flame retardancy over a long period and having a good capacity maintenance rate. The exemplary embodiment is a nonaqueous electrolyte solution containing a lithium salt, at least one oxo-acid ester derivative of phosphorus selected from compounds represented by a predetermined formula, and at least one disulfonate ester selected from a cyclic disulfonate ester and a linear disulfonate ester represented by the predetermined formulae.

Description

technical field [0001] The present invention relates to a nonaqueous electrolyte solution, and a lithium ion secondary battery having the nonaqueous electrolyte solution. Background technique [0002] Since lithium ion secondary batteries (devices with non-aqueous electrolyte solutions) can achieve high energy density, they are attracting attention as batteries for mobile phones, batteries for notebook computers, batteries for high-power storage, and batteries for automobiles. [0003] Although lithium-ion secondary batteries can achieve high energy density, the enlarged size makes the energy huge, but requires high safety. For example, particularly high safety is required in large-scale power supplies for energy storage and power supplies for automobiles. Therefore, safety measures such as structural design of batteries, packaging, etc., protective circuits, electrode materials, additives with overcharge protection functions, and enhanced shutdown functions of separators a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/052H01M10/0567H01M10/0569H01M10/0568H01M10/42H01G11/62H01G11/64H01G11/60H01M10/0565
CPCH01G9/038H01G11/60H01M10/052H01M10/0565H01M10/0567H01M10/0568H01M10/0569H01M10/4235Y02E60/122Y02E60/13Y02E60/10H01G11/62H01G11/64H01G9/035H01G9/145H01M10/0525H01M2300/0025
Inventor 金子志奈石川仁志桥诘洋子铃木锐二
Owner ENVISION AESC ENERGY DEVICES LTD
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