Additive for non-aqueous electrolyte solution, electrolyte solution for non-aqueous electrolyte solution battery, and non-aqueous electrolyte solution battery

Patent metadata

Field	Value
Publication number	US-11545697-B2
Application number	US-201816645601-A
Country	US
Kind code	B2
Filing date	Sep 12, 2018
Priority date	Sep 12, 2017
Publication date	Jan 3, 2023
Grant date	Jan 3, 2023

Abstract

An additive for a non-aqueous electrolyte solution that can suppress the initial gas generation amount when used in a non-aqueous electrolyte solution battery. The additive for a non-aqueous electrolyte solution is represented by any one of formulae [1] to [4]:

wherein R 1 , R 2 , R 3 , R 4 , X 1 , X 2 and Y are as defined in the specification.

First claim

What is claimed is:

1. An electrolyte solution for a non-aqueous electrolyte solution battery, comprising a non-aqueous solvent, a solute, and an additive for a non-aqueous electrolyte solution, wherein the additive is represented by any one of formula [1], formula [2], formula [3], and formula [4]:

wherein, in the formula [1], formula [2], formula [3], and formula [4],
X 1 and X 2 are each independently a fluorine atom or an organic group selected from the group consisting of a linear or branched alkyl group having 1 to 10 carbon atoms, a linear or branched alkoxy group having 1 to 10 carbon atoms, a linear or branched alkenyl group having 2 to 10 carbon atoms, a linear or branched alkenyloxy group having 2 to 10 carbon atoms, a linear or branched alkynyl group having 2 to 10 carbon atoms, a linear or branched alkynyloxy group having 2 to 10 carbon atoms, a cycloalkyl group having 3 to 10 carbon atoms, a cycloalkoxy group having 3 to 10 carbon atoms, a cycloalkenyl group having 3 to 10 carbon atoms, a cycloalkenyloxy group having 3 to 10 carbon atoms, an aryl group having 6 to 10 carbon atoms, and an aryloxy group having 6 to 10 carbon atoms, wherein the organic group optionally contains a fluorine atom, an oxygen atom, or an unsaturated bond;
Y is a carbon atom or a sulfur atom;
R 1 and R 2 are each independently an organic group selected from the group consisting of a linear or branched alkyl group having 1 to 10 carbon atoms, a linear or branched alkoxy group having 1 to 10 carbon atoms, a linear or branched alkenyl group having 2 to 10 carbon atoms, a linear or branched alkenyloxy group having 2 to 10 carbon atoms, a linear or branched alkynyl group having 2 to 10 carbon atoms, a linear or branched alkynyloxy group having 2 to 10 carbon atoms, a cycloalkyl group having 3 to 10 carbon atoms, a cycloalkoxy group having 3 to 10 carbon atoms, a cycloalkenyl group having 3 to 10 carbon atoms, a cycloalkenyloxy group having 3 to 10 carbon atoms, an aryl group having 6 to 10 carbon atoms, and an aryloxy group having 6 to 10 carbon atoms, wherein the organic group optionally contains a fluorine atom, an oxygen atom, or an unsaturated bond;
R 3 and R 4 are each independently an organic group selected from the group consisting of a linear or branched alkyl group having 1 to 10 carbon atoms, a linear or branched alkenyl group having 2 to 10 carbon atoms, a linear or branched alkynyl group having 2 to 10 carbon atoms, a cycloalkyl group having 3 to 10 carbon atoms, a cycloalkenyl group having 3 to 10 carbon atoms, and an aryl group having 6 to 10 carbon atoms, wherein the organic group optionally contains a fluorine atom, an oxygen atom, or an unsaturated bond; and
R 1 and R 2 or R 1 and R 4 optionally form together a cyclic structure as shown in formula [5] or formula [6]:

2. The non-aqueous electrolyte solution according to claim 1 , wherein, in the formula [1], formula [2], formula [3], and formula [4],
X 1 and X 2 are each independently a fluorine atom or a group selected from the group consisting of a methyl group, a trifluoromethyl group, and a phenyl group;
at least one of R 1 and R 2 is a group selected from the group consisting of a methyl group, a methoxy group, an ethyl group, an ethoxy group, a propyl group, a propoxyl group, a vinyl group, an allyl group, an allyloxy group, an ethynyl group, a 2-propynyl group, a 2-propynyloxy group, a phenyl group, and a phenyloxy group; and
at least one of R 3 and R 4 is a group selected from the group consisting of a methyl group, an ethyl group, a propyl group, a vinyl group, an allyl group, an ethynyl group, a 2-propynyl group, and a phenyl group.

3. The non-aqueous electrolyte solution according to claim 1 , wherein, in the formula [1], formula [2], formula [3], and formula [4],
X 1 and X 2 are each independently a fluorine atom or a group selected from the group consisting of a methyl group, a trifluoromethyl group, and a phenyl group; and
R 1 and R 2 or R 1 and R 4 form together a cyclic structure represented by any one of formula [7], formula [8], formula [9], formula [10], and formula [11]:

wherein, in the formula [7], formula [8], formula [9], formula [10], and formula [11],
R 5 , R 6 , R 7 , R 8 and R 9 are each independently a fluorine atom or an organic group selected from the group consisting of a linear or branched alkyl group having 1 to 10 carbon atoms, a linear or branched alkoxy group having 1 to 10 carbon atoms, a linear or branched alkenyl group having 2 to 10 carbon atoms, a linear or branched alkenyloxy group having 2 to 10 carbon atoms, a linear or branched alkynyl group having 2 to 10 carbon atoms, a linear or branched alkynyloxy group having 2 to 10 carbon atoms, a cycloalkyl group having 3 to 10 carbon atoms, a cycloalkoxy group having 3 to 10 carbon atoms, a cycloalkenyl group having 3 to 10 carbon atoms, a cycloalkenyloxy group having 3 to 10 carbon atoms, an aryl group having 6 to 10 carbon atoms, and an aryloxy group having 6 to 10 carbon atoms, wherein the organic group optionally contains a fluorine atom, an oxygen atom, or an unsaturated bond; and
a and c are each an integer of 0 to 6; b and d are each an integer of 0 to 4; and e is an integer of 0 to 8.

4. The non-aqueous electrolyte solution according to claim 3 , wherein, in the formula [1], formula [2], formula [3], and formula [4],
R 3 is a methyl group, an ethyl group, a propyl group, a vinyl group, an allyl group, an ethynyl group, a 2-propynyl group, or a phenyl group;
R 5 , R 6 , R 7 , R 8 , and R 9 are each independently a fluorine atom or a group selected from the group consisting of a methyl group, a vinyl group, an allyl group, an allyloxy group, an ethynyl group, a 2-propynyl group, and a phenyl group; and
a, b, c, d, and e are each an integer of 0 to 2.

5. The electrolyte solution for a non-aqueous electrolyte solution battery according to claim 1 , wherein a content of the additive for a non-aqueous electrolyte solution is within a range of 0.001 to 5.0 mass % based on the total amount of the non-aqueous solvent, the solute, and the additive for a non-aqueous electrolyte solution.

6. The electrolyte solution for a non-aqueous electrolyte solution battery according to claim 5 , wherein the solute is at least one selected from the group consisting of LiPF 6 , LiBF 4 , LiPF 2 (C 2 O 4 ) 2 , LiPF 4 (C 2 O 4 ), LiP(C 2 O 4 ) 3 , LiBF 2 (C 2 O 4 ), LiB(C 2 O 4 ) 2 , LiPO 2 F 2 , LiN(POF 2 ) 2 , LiN(FSO 2 )(POF 2 ), LiN(FSO 2 )(POF(OCH 2 C═CH)), LiN(FSO 2 ) 2 , LiN(CF 3 SO 2 ) 2 , LiN(CF 3 SO 2 )(FSO 2 ), LiSO 3 F, NaPF 6 , NaBF 4 , NaPF 2 (C 2 O 4 ) 2 , NaPF 4 (C 2 O 4 ), NaP(C 2 O 4 ) 3 , NaBF 2 (C 2 O 4 ), NaB(C 2 O 4 ) 2 , NaPO 2 F 2 , NaN(POF 2 ) 2 , NaN(FSO 2 )(POF 2 ), NaN(FSO 2 )(POF(OCH 2 C═CH)), NaN(FSO 2 ) 2 , NaN(CF 3 SO 2 )2, NaN(CF 3 SO 2 )(FSO 2 ), and NaSO 3 F.

7. The electrolyte solution for a non-aqueous electrolyte solution battery according to claim 1 , the electrolyte solution further comprising at least one selected from the group consisting of vinylene carbonate, fluoroethylene carbonate, ethynylethylene carbonate, trans-difluoroethylene carbonate, (ethoxy)pentafluorocyclotriphosphazene, tetravinylsilane, and 1,3-propanesultone.

8. The electrolyte solution for a non-aqueous electrolyte solution battery according to claim 1 , wherein the non-aqueous solvent is at least one selected from the group c

Assignees

• Central Glass Co Ltd

Inventors

• Morinaka Takayoshi
• Nakahara Keita
• Iwasaki Susumu
• Kawabata Wataru
• Takahashi Mikihiro

Classifications

• H01M10/054

  Accumulators with insertion or intercalation of metals other than lithium, e.g. with magnesium or aluminium · CPC title

• C07F9/65515

  the oxygen atom being part of a five-membered ring · CPC title

• H01M10/052

  Li-accumulators · CPC title

• H01M10/0568

  characterised by the solutes · CPC title

• H01M2300/0028

  characterised by the solvent · CPC title