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Non-aqueous Electrolytic Solution, And Non-aqueous Electrolyte Battery Comprising Same

A non-aqueous electrolyte and electrolyte technology, applied in non-aqueous electrolyte batteries, electrolytes, lithium batteries, etc., can solve the problem of lack of clear records, and achieve the effect of improving continuous charging characteristics and improving overcharging characteristics.

Inactive Publication Date: 2014-10-22
MITSUBISHI CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In addition, Patent Document 2 describes aromatic compounds such as 1-acetoxy-2-fluorobenzene, 1-acetoxy-3-fluorobenzene, and 1-acetoxy-4-fluorobenzene as additives for batteries. It is effective, but it is not clearly documented which characteristics can be improved

Method used

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  • Non-aqueous Electrolytic Solution, And Non-aqueous Electrolyte Battery Comprising Same
  • Non-aqueous Electrolytic Solution, And Non-aqueous Electrolyte Battery Comprising Same
  • Non-aqueous Electrolytic Solution, And Non-aqueous Electrolyte Battery Comprising Same

Examples

Experimental program
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Effect test

Embodiment 1

[0400] In a mixed solvent of ethylene carbonate (EC) as a saturated cyclic carbonate, dimethyl carbonate (DMC) as a chain carbonate, and ethyl methyl carbonate (EMC) (mixing volume ratio 2:7:1) In the 1mol / L ratio, LiPF as the electrolyte 6 After dissolving, 4-fluorophenyl acetate and vinylene carbonate (VC) were added so as to make them 2% by weight with respect to the total weight of the electrolytic solution, respectively, to prepare a non-aqueous electrolytic solution. Using the obtained non-aqueous electrolytic solution, a lithium secondary battery was manufactured according to the above-mentioned method, and a capacity evaluation test, an overcharge characteristic evaluation test, and a storage characteristic evaluation test were performed. The results are shown in Table 1.

Embodiment 2

[0402] In a mixed solvent of ethylene carbonate (EC), propylene carbonate (PC) as a saturated cyclic carbonate, and dimethyl carbonate (DMC) as a chain carbonate (mixing volume ratio 2:1:7 ), LiPF as electrolyte is made at a ratio of 1mol / L 6 After dissolving, 4-fluorophenyl acetate and vinylene carbonate (VC) were added so as to make them 2% by weight with respect to the total weight of the electrolytic solution, respectively, to prepare a non-aqueous electrolytic solution. Using the obtained non-aqueous electrolytic solution, a lithium secondary battery was manufactured according to the above-mentioned method, and a capacity evaluation test, an overcharge characteristic evaluation test, and a storage characteristic evaluation test were performed. The results are shown in Table 1.

Embodiment 3

[0404] In a mixed solvent of ethylene carbonate (EC) as a saturated cyclic carbonate, dimethyl carbonate (DMC) as a chain carbonate, and ethyl methyl carbonate (EMC) (mixing volume ratio 2:7:1) In the 1mol / L ratio, LiPF as the electrolyte 6 After dissolving, 4-fluorophenyl acetate and vinylene carbonate (VC) were added so as to make them respectively 4% by weight and 2% by weight relative to the total weight of the electrolyte solution to prepare a non-aqueous electrolyte solution. Using the obtained non-aqueous electrolytic solution, a lithium secondary battery was manufactured according to the above-mentioned method, and a capacity evaluation test, an overcharge characteristic evaluation test, and a storage characteristic evaluation test were performed. The results are shown in Table 1.

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Abstract

A nonaqueous electrolytic solution comprising a lithium salt and a nonaqueous organic solvent, wherein the nonaqueous organic solvent comprises: at least one member selected from the group consisting of saturated cyclic carbonates, linear carbonates, and aliphatic carboxylic acid esters, in a total proportion exceeding 90% by volume; and a fluorine-substituted aromatic ester compound represented by the following general formula (1) in an amount of 0.01-10% by weight based on the weight of the whole nonaqueous electrolytic solution; and a nonaqueous-electrolyte battery including the nonaqueous electrolytic solution. €ƒ€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ€ƒXn-Ph-OCOR€ƒ€ƒ€ƒ€ƒ€ƒ(1) [In general formula (1), Ph is phenylene, and R is a hydrocarbon group which has 1-12 carbon atoms and may have been substituted with a fluorine atom. X is a fluorine atom or a fluorine-substituted alkyl group having 1-12 carbon atoms, and n is an integer of 1-4.] Furthermore disclosed are: a nonaqueous electrolytic solution which comprises an electrolyte, a nonaqueous solvent and a compound represented by general formula (3); and a nonaqueous-electrolyte battery including the nonaqueous electrolytic solution. [In general formula (3), R 1 represents a hydrocarbon group which has 1-12 carbon atoms and may have been substituted with a fluorine atom, and R 2 to R 6 each independently represent a hydrogen atom, a fluorine atom, or an alkyl group which has 1-12 carbon atoms and may have been substituted with a fluorine atom, at least one of R 2 to R 6 representing an alkyl group which has 2 or more carbon atoms and may have been substituted with a fluorine atom. Symbol n represents an integer of 0 or 1. When n is 1, at least one of R 2 to R 6 represents an alkyl group which has 5 or more carbon atoms and may have been substituted with a fluorine atom.]

Description

[0001] This application is a divisional application of an application with a filing date of August 30, 2010, an application number of 201080037241.3, and an invention title of "Nonaqueous Electrolyte and a Nonaqueous Electrolyte Battery Using the Nonaqueous Electrolyte". technical field [0002] The present invention relates to a nonaqueous electrolytic solution and a nonaqueous electrolyte battery using the nonaqueous electrolytic solution. Background technique [0003] Lithium secondary batteries have the advantages of high energy density and low self-discharge. Therefore, in recent years, it has been widely used in power supplies for consumer portable devices such as mobile phones, notebook computers, and PDAs. [0004] A common electrolytic solution for a lithium secondary battery contains a lithium salt as a supporting electrolyte and a non-aqueous solvent as main components. For the non-aqueous solvent used, it is required to have a high dielectric constant to dissoci...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0567H01M10/0569H01M10/0525
CPCY02E60/122H01M10/056H01M10/0569H01M10/0568H01M10/0525H01M10/0567Y02E60/10H01M10/0563H01M10/052H01M2300/002
Inventor 大贯正道古田土稔深水浩二町田裕美子大桥洋一
Owner MITSUBISHI CHEM CORP
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