US 2005/0233221 A1 · Solid electrolyte comprising fluorine-containing polymer having fluorine-containing ether chains

Abstract

There is provided a fluorine-containing polymer solid electrolyte which has an excellent ion-conducting property, is high in oxidation resistance, is stable electrochemically and thermally, has sufficient strength and is applicable to various electrochemical devices. The electrolyte comprises (I) a non-crystalline fluorine-containing polymer which has a polar nonionic functional group and has, in a side chain of the polymer molecule, a structural unit D having 1 to 4 units derived from a fluorine-containing ether in the form of continuous chain, (II) an electrolytic compound and as case demands, (III) a solvent. The electrolyte has an ionic conductivity of from 10−10 to 101 S/cm measured at 25° C. by an alternating current complex impedance method, and is useful for various electrochemical devices.

Claims34

Dependent claims

A fluorine-containing polymer solid electrolyte which has an ionic conductivity of from 10−10 to 101 S/cm measured at 25° C. by alternating current complex impedance method and comprises:

(I) a non-crystalline fluorine-containing polymer which has a polar nonionic functional group Y and has recurring units having, in a side chain thereof, a structural unit D derived from a fluorine-containing ether and represented by the formula (D):
—(d1)n1—(d2)n2—(d3)n3—(d4)n4—
wherein
(d1) is —(OCF2CF2CF2)—,
(d2) is —(OCFX1CF2)— or —(OCF2CFX1)—,
(d3) is —(OCFX2)—,
(d4) is —(OCH2CF2CF2)— or —(OCF2CF2CH2)—;
n1, n2, n3 and n4 are the same or different and each is 0 or an integer of 1 or more, n1+n2+n3+n4 is an integer of from 1 to 4;
X1 and X2 are the same or different and each is F or CF3;
in the side chain, two or more structural units (D) are not bonded continuously to each other, and
(II) an electrolytic compound.

8 more elements

A fluorine-containing polymer solid electrolyte which has an ionic conductivity of from 10−10 to 101 S/cm measured at 25° C. by alternating current complex impedance method and comprises:

(Ib) a non-crystalline fluorine-containing polymer having hydroxyl which has a number average molecular weight of from 500 to 1,000,000, has recurring units having, in its side chain, a structural unit D derived from a fluorine-containing ether and represented by the formula (D):
—(d1)n1—(d2)n2—(d3)n3—(d4)n4—
wherein
(d1) is —(OCF2CF2CF2)—,
(d2) is —(OCFX1CF2)— or —(OCF2CFX1)—,
(d3) is —(OCFX2)—,
(d4) is —(OCH2CF2CF2)— or —(OCF2CF2CH2)—;
n1, n2, n3 and n4 are the same or different and each is 0 or an integer of 1 or more, n1+n2+n3+n4 is an integer of from 1 to 4;
X1 and X2 are the same or different and each is F or CF3;
in the side chain, two or more structural units (D) are not bonded continuously to each other, and is represented by the formula (1b):
—(M1b)—(A)— (1b)
wherein the structural unit M1b is a structural unit derived from a fluorine-containing ethylenic monomer (m1b) having hydroxyl and represented by the formula (M1b-2):
wherein X3 and X4 are the same or different and each is H or F;
X5 is H, F, CH3 or CF3;
X6 and X7 are the same or different and each is H, F or CF3;
Rf2 is a fluorine-containing monovalent organic group having hydroxyl which has 2 to 100 carbon atoms and 1 to 4 structures of the formula (D1b):
D—(R1)n5—(OH)n6 (D1b)
wherein R1 is a di-, tri- or tetra-valent organic group;
n5 is 0 or 1;
n6 is an integer of from 1 to 3;
D is as defined in the formula (D), and two or more structural units (D) are not bonded continuously to each other;
a is 0 or an integer of from 1 to 3;
c is 0 or 1;
the structural unit A is a structural unit derived from a monomer (a) copolymerizable with the monomer (m1b), and
the structural units M1b and A are contained in amounts of from 1 to 100% by mole and from 0 to 99% by mole, respectively, and
(IIc) at least one selected from ionic polymers and salts thereof.

23 more elements

Dependencies are inferred from the claim text.

Solid electrolyte comprising fluorine-containing polymer having fluorine-containing ether chains

Life of this patent

Solid electrolyte comprising fluorine-containing polymer having fluorine-containing ether chains

Life of this patent

Abstract

Claims34