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Nonaqueous electrolyte solution and nonaqueous secondary battery

A non-aqueous electrolyte and secondary battery technology, which is applied in the direction of non-aqueous electrolyte batteries, secondary batteries, non-aqueous electrolytes, etc., can solve the problems of increasing the risk of battery fire, and achieve the purpose of suppressing battery deterioration, improving output performance, and suppressing deterioration Effect

Pending Publication Date: 2022-04-12
ASAHI KASEI KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In addition, high energy density and rapid charging of non-aqueous secondary batteries will increase the risk of battery fire, so further safety measures are also required

Method used

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  • Nonaqueous electrolyte solution and nonaqueous secondary battery
  • Nonaqueous electrolyte solution and nonaqueous secondary battery
  • Nonaqueous electrolyte solution and nonaqueous secondary battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0489] Hereinafter, the present invention will be described in more detail using examples, but the present invention is not limited to these examples.

no. 1 Embodiment approach 》

[0491] (1) Preparation of non-aqueous electrolyte

[0492] In an inert atmosphere, various non-aqueous solvents, various acid anhydrides, and various additives are mixed so as to have predetermined concentrations respectively, and various lithium salts are added so as to respectively become predetermined concentrations to prepare non-aqueous electrolyte solutions (S1)~(S44).

[0493] The abbreviations of nonaqueous solvents, lithium salts, and additives in Tables 1-1 to 1-6 have the following meanings, respectively. In addition, the parts by mass of the additives in Tables 1-1 to 1-6 represent parts by mass with respect to 100 parts by mass of the nonaqueous electrolytic solution not including the additives.

[0494] (lithium salt)

[0495] LiPF 6 : Lithium hexafluorophosphate

[0496] LiFSI: lithium bis(fluorosulfonyl)imide

[0497] LiBOB: lithium bisoxalate borate

[0498] LiFSO 3 : lithium fluorosulfonate

[0499] (non-aqueous solvent)

[0500] AcN: acetonitrile

[...

Embodiment 1～10 and comparative example 1～17

[0599] Here, the test results of the coin-type non-aqueous secondary battery (P1 / N1) will be described.

[0600] The quick charge capacity maintenance rate is an index indicating that the larger the value, the more charge can be made in a short time. The quick charge capacity retention rate is preferably 40% or more, more preferably 45% or more, and still more preferably 50% or more.

[0601] The restored charge capacity maintenance rate is an index of the irreversible capacity in the quick charge test. The larger the value, the smaller the amount of lithium irreversibly consumed in the fast charging test, and the more battery capacity can be used even after the fast charging. The recovery charge capacity retention rate is preferably 90% or higher, more preferably 95% or higher, and still more preferably 97% or higher. On the other hand, when the recovery charge capacity maintenance rate exceeds 100%, side reactions continue to occur in the battery, and it is preferably 100%...

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Abstract

Provided is a non-aqueous electrolyte solution containing: a non-aqueous solvent containing acetonitrile and vinylene carbonate; and a compound represented by general formula (1): R1-A-R2 (1) (In the formula, A represents a divalent group having a structure represented by any of formulae (1-2) to (1-5), R1 and R2 are each independently an aryl group, an optionally halogen atom-substituted alkyl group having 1-4 carbon atoms, an alkyl group, an optionally halogen atom-substituted vinylidene group, or an optionally halogen atom-substituted aryl group; or R1 and R2 are bonded to each other to form, together with A, a cyclic structure optionally having an unsaturated bond. A compound represented by the formula; the total content of the vinylene carbonate and the compound represented by general formula (1) is 0.1 vol% or more and less than 10 vol% with respect to the total amount of the non-aqueous solvent, and the content of the vinylene carbonate is less than the content of the compound represented by general formula (1).

Description

technical field [0001] The present invention relates to a non-aqueous electrolytic solution, a non-aqueous secondary battery and the like. Background technique [0002] Non-aqueous secondary batteries such as lithium-ion batteries are lightweight, high-energy, and have a long life, and are widely used as power sources for various portable electronic devices. In recent years, non-aqueous secondary batteries have also expanded in industrial applications represented by power tools such as electric tools, and in-vehicle applications such as electric vehicles and electric bicycles, and are also used in power storage fields such as residential power storage systems. Having attention. [0003] The electrolyte solution of the lithium-ion battery uses a non-aqueous electrolyte solution. For example, a combination of a high dielectric solvent such as a cyclic carbonate and a low-viscosity solvent such as a lower chain carbonate is generally used. In addition, in order to form an SE...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0569H01M10/0525
CPCH01M10/0567H01M10/0568H01M10/0569H01M4/5825H01M10/0525H01M50/417H01M50/423H01M50/44H01M50/457H01M50/454H01M50/489H01M50/449H01M50/451H01M50/434H01M50/443H01M2300/0028Y02E60/10H01M2300/0037H01M2300/0025
Inventor 加味根丈主松冈直树伊藤慎张珣
Owner ASAHI KASEI KK
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