Nonaqueous electrolytic solution and electrical storage device including the same

Patent metadata

Field	Value
Publication number	US-2020388887-A1
Application number	US-202017001922-A
Country	US
Kind code	A1
Filing date	Aug 25, 2020
Priority date	Mar 27, 2018
Publication date	Dec 10, 2020
Grant date	—

Abstract

A nonaqueous electrolytic solution including an electrolyte, a nonaqueous solvent, and a compound represented by Formula (1) below.

(in Formula (1), X 1 and X 2 each independently represent C, S, or P; n 1 and n 2 each independently represent 1 when X 1 and X 2 represent C or P and 2 when X 1 and X 2 represent S; n 1 represents 1 or 2; n 2 represents 1 or 2; Y 1 and Y 2 each independently represent a hydrocarbon group that may have a substituent or an —OW group (where W represents a hydrocarbon group that may have a substituent); m 1 represents 1 or 2, and m 2 represents 1 or 2; and Z represents a hydrocarbon group that may have a substituent, an —SiV 3 group (where V represents a hydrocarbon group that may have a substituent), an organic onium, or a metal).

First claim

1 . A nonaqueous electrolytic solution comprising a nonaqueous solvent and a compound represented by Formula (1) below.

(wherein, in Formula (1), P and O are not abbreviations but symbols of element;
X 1 and X 2 each independently represent C, S, or P;
n 1 and n 2 each independently represent 1 when X 1 and X 2 represent C or P and 2 when X 1 and X 2 represent S;
n 1 represents 1 when X 1 represents C or P and 2 when X 1 represents S;
n 2 represents 1 when X 2 represents C or P and 2 when X 2 represents S;
Y 1 and Y 2 each independently represent a hydrocarbon group that may have a substituent or an —OW group (where W represents a hydrocarbon group that may have a substituent);
m 1 represents 1 when X 1 represents C or S and 2 when X 1 represents P, and m 2 represents 1 when X 2 represents C or S and 2 when X 2 represents P; and
Z represents a hydrocarbon group that may have a substituent, an —SiV 3 group (where V represents a hydrocarbon group that may have a substituent), an organic onium, or a metal)

2 . The nonaqueous electrolytic solution according to claim 1 , wherein, in Formula (1), X 1 and X 2 represent C, n 1 and n 2 represent 1, and m 1 and m 2 represent 1.

3 . The nonaqueous electrolytic solution according to claim 1 or 2 , wherein, in Formula (1), Y 1 and Y 2 each independently represent a group selected from the group consisting of an alkyl group having 1 to 6 carbon atoms the hydrogen atoms of which may be partially replaced with halogen atoms, an alkenyl group having 2 to 6 carbon atoms the hydrogen atoms of which may be partially replaced with halogen atoms, an alkynyl group having 2 to 6 carbon atoms the hydrogen atoms of which may be partially replaced with halogen atoms, an aryl group having 6 to 12 carbon atoms the hydrogen atoms of which may be partially replaced with halogen atoms, and an arylalkyl group having 7 to 13 carbon atoms the hydrogen atoms of which may be partially replaced with halogen atoms, or
an —OW group where W is selected from the group consisting of an alkyl group having 1 to 6 carbon atoms the hydrogen atoms of which may be partially replaced with halogen atoms, an alkenyl group having 2 to 6 carbon atoms the hydrogen atoms of which may be partially replaced with halogen atoms, an alkynyl group having 2 to 6 carbon atoms the hydrogen atoms of which may be partially replaced with halogen atoms, an aryl group having 6 to 12 carbon atoms the hydrogen atoms of which may be partially replaced with halogen atoms, and an arylalkyl group having 7 to 13 carbon atoms the hydrogen atoms of which may be partially replaced with halogen atoms.

4 . The nonaqueous electrolytic solution according to any one of claims 1 to 3 , wherein, in Formula (1), Z represents a group selected from the group consisting of an alkyl group having 1 to 6 carbon atoms the hydrogen atoms of which may be partially replaced with halogen atoms, an alkenyl group having 2 to 6 carbon atoms the hydrogen atoms of which may be partially replaced with halogen atoms, an alkynyl group having 2 to 6 carbon atoms the hydrogen atoms of which may be partially replaced with halogen atoms, an aryl group having 6 to 12 carbon atoms the hydrogen atoms of which may be partially replaced with halogen atoms, and an arylalkyl group having 7 to 13 carbon atoms the hydrogen atoms of which may be partially replaced with halogen atoms,
an —SiV 3 group where V is selected from the group consisting of an alkyl group having 1 to 6 carbon atoms the hydrogen atoms of which may be partially replaced with halogen atoms, an alkenyl group having 2 to 6 carbon atoms the hydrogen atoms of which may be partially replaced with halogen atoms, an alkynyl group having 2 to 6 carbon atoms the hydrogen atoms of which may be partially replaced with halogen atoms, an aryl group having 6 to 12 carbon atoms the hydrogen atoms of which may be partially replaced with halogen atoms, and an arylalkyl group having 7 to 13 carbon atoms the hydrogen atoms of which may be partially replaced with halogen atoms, hydrogen, or an alkali metal.

5 . The nonaqueous electrolytic solution according to any one of claims 1 to 4 , wherein the content of the compound represented by Formula (1) is 0.001% by mass or more and 10% by mass or less.

6 . The nonaqueous electrolytic solution according to any one of claims 1 to 5 , the nonaqueous electrolytic solution comprising an electrolyte.

7 . The nonaqueous electrolytic solution according to any one of claims 1 to 6 , the nonaqueous electrolytic solution further comprising at least one compound selected from the group consisting of a fluorine-containing cyclic carbonate, a sulfur-containing organic compound, a phosphorus-containing organic compound, an organic compound having a cyano group, an organic compound having an isocyanate group, a silicon-containing compound, an aromatic compound, a cyclic carbonate having an unsaturated carbon-carbon bond, a fluorine-free carboxylate ester, a cyclic compound having plural ether linkages, a compound having an isocyanuric acid skeleton, a monofluorophosphate salt, a difluorophosphate salt, a borate salt, an oxalate salt, and a fluorosulfonate salt.

8 . The nonaqueous electrolytic solution according to claim 7 , wherein the total content of the at least one compound selected from the group consisting of a fluorine-containing cyclic carbonate, a sulfur-containing organic compound, a phosphorus-containing organic compound, an organic compound having a cyano group, an organic compound having an isocyanate group, a silicon-containing compound, an aromatic compound, a cyclic carbonate having an unsaturated carbon-carbon bond, a fluorine-free carboxylate ester, a cyclic compound having plural ether linkages, a compound having an isocyanuric acid skeleton, a monofluorophosphate salt, a difluorophosphate salt, a borate salt, an oxalate salt, and a fluorosulfonate salt is 0.001% by mass or more and 50% by mass or less of the total amount of the nonaqueous electrolytic solution.

9 . The nonaqueous electrolytic solution according to any one of claims 1 to 8 , the nonaqueous electrolytic solution being used for producing a nonaqueous electrolytic solution secondary battery.

10 . An electrical storage device comprising negative and positive electrodes capable of occluding and releasing a lithium ion, and a nonaqueous electrolytic solution including an electrolyte and a nonaqueous solvent, wherein the nonaqueous electrolytic solution is the nonaqueous electrolytic solution according to any one of claims 1 to 9 .

11 . The electrical storage device according to claim 10 , the electrical storage device being a nonaqueous electrolytic solution secondary battery.

Assignees

• Mitsubishi Chem Corp

Inventors

• Takehara Masahiro
• Kawakami Daisuke

Classifications

• H01M2300/0025

  Organic electrolyte · CPC title

• H01M10/0567 Primary

  characterised by the additives · CPC title

• C07F9/307

  Acids containing the structure -C(=X)-P(=X)(R)(XH) or NC-P(=X)(R)(XH), (X = O, S, Se) · CPC title

• H01M10/0525 Primary

  Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries · CPC title

• H01M2300/0051

  Carbonates · CPC title