Nonaqueous electrolyte compositions comprising lithium glycolatoborate and fluorinated solvent

1. A lithium-ion battery comprising:

a housing;

an anode and a cathode that are disposed in the housing and in ionically conductive contact with one another;

an electrolyte composition that is disposed in the housing and providing an ionically conductive pathway between the anode and the cathode; and

a porous separator between the anode and the cathode,

wherein the cathode comprises a cathode active material which is charged to a potential greater than or equal to 4.35 V versus a Li/Li + reference electrode, and

wherein the electrolyte composition comprises:

a) a solvent mixture of about 30% by weight of ethylene carbonate and about 70% by weight of difluoroethyl acetate (DFEA);

b) lithium bis(glycolato) borate in an amount of about 1% by weight of the electrolyte composition;

c) 4-fluoroethylene carbonate in an amount of about 2% by weight of the electrolyte composition; and

d) LiPF 6 .

2. The battery of claim 1 , wherein the anode comprises an anode active material and the anode active material is lithium titanate or graphite.

3. The battery of claim 1 , wherein the cathode comprises a cathode active material that exhibits a capacity that is greater than 30 mAh/g in a potential range of more than 4.6 V versus a Li/Li + reference electrode.

4. The battery of claim 1 , wherein the cathode active material comprises:

a) a lithium-containing manganese composite oxide having a spinel structure as an active material, the lithium-containing manganese composite oxide comprising oxides of the formula (III):

Li x Ni y M z Mn 2-y-z O 4-d   (III)

where x is 0.03 to 1.0 and changes in accordance with release and uptake of lithium ions and electrons during charge and discharge, y is 0.3 to 0.6; M comprises one or more of Cr, Fe, Co, Li, Al, Ga, Nb, Mo, Ti, Zr, Mg, Zn, V, and Cu, z is 0.01 to 0.18, and d is 0 to 0.3; or

b) a composite material represented by the formula (IV):

x(Li 2-w A 1-v Q w+v O 3-e )·(1−x)(Li y Mn 2-z M z O 4-d )  (IV)

where: x is about 0 to about 0.1;

A comprises one or more of Mn or Ti;

Q comprises one or more of Al, Ca, Co, Cr, Cu, Fe, Ga, Mg, Nb, Ni, Ti, V, Zn, Zr or Y;

e is 0 to about 0.3;

v is 0 to about 0.5;

w is 0 to about 0.6;

M comprises one or more of Al, Ca, Co, Cr, Cu, Fe, Ga, Li, Mg, Mn, Nb, Ni, Si, Ti, V, Zn, Zr or Y;

d is 0 to about 0.5;

y is about 0 to about 1; and

z is about 0.3 to about 1;

wherein the Li y Mn 2-z M z O 4-d component has a spinel structure and the Li 2-w Q w+v A 1-v O 3-e component has a layered structure; or

c) a composition represented by the formula (V):

Li a Ni b Mn c Co d R e O 2-f Z f   (V)

where R is Al, Ni, Co, Mn, Cr, Fe, Mg, Sr, V, Zr, Ti, a rare earth element, or a combination thereof; Z is F, S, P, or a combination thereof; and 0.8≤a≤1.2, 0.1≤b≤0.9, 0.0≤c≤0.7, 0.05≤d≤0.4, 0≤e≤0.2; wherein the sum of b+c+d+e is about 1; and 0≤f≤0.08; or

d) a composition represented by the formula (VI):

Li a A 1-x R x DO 4-f Z f ,  (VI)

where A is Fe, Mn, Ni, Co, V, or a combination thereof;

R is Al, Ni, Co, Mn, Cr, Fe, Mg, Sr, V, Zr, Ti, a rare earth element, or a combination thereof;

D is P, S, Si, or a combination thereof;

Z is F, Cl, S, or a combination thereof;

0.8≤a≤2.2;

0≤x≤0.3; and

0≤f≤0.1; or

e) a composition represented by formula (VII):

Li a A 1-b ,R b D 2   (VII)

where A is Ni, Co, Mn, or a combination thereof;

R is Al, Ni, Co, Mn, Cr, Fe, Mg, Sr, V, Zr, Ti, a rare earth element, or a combination thereof;

D is 0, F, S, P, or a combination thereof; and

0.90≤a≤1.8 and 0≤b≤0.5.

5. An electronic device, transportation device, or telecommunications device, comprising the battery of claim 1 .