Electrolyte for lithium secondary battery and lithium secondary battery including the same
First Claim
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1. A lithium secondary battery comprising a cathode comprising a spinel-structure lithium nickel manganese composite oxide represented by Formula 1 below as a cathode active material;
- an anode comprising a lithium metal oxide represented by Formula 2 below as an anode active material; and
an electrolyte comprising a non-aqueous solvent and a lithium salt,wherein the non-aqueous solvent consists of;
1 to 60 wt % of a cyclic carbonate based on a total weight of the non-aqueous solvent, and40 to 99 wt % of a linear solvent based on a total weight of the non-aqueous solvent,wherein the cyclic carbonate is FEC, and the linear solvent is DMC or MP,
LixMyMn2−
yO4−
zAz
(1)
LiaM′
bO4−
cA′
c
(2)wherein, in Formula 1, 0.9≤
x≤
1.2, 0<
y<
2, and 0≤
z<
0.2;
M is at least one element selected from the group consisting of Al, Mg, Ni, Co, Fe, Cr, V, Ti, Cu, B, Ca, Zn, Zr, Nb, Mo, Sr, Sb, W, Ti, and Bi; and
A is at least one monovalent or divalent anion,wherein, in Formula 2, M′
is at least one element selected from the group consisting of Ti, Sn, Cu, Pb, Sb, Zn, Fe, In, Al, and Zr;
0.1≤
a≤
4 and 0.2≤
b≤
4, wherein a and b are determined according to oxidation number of M′
;
0≤
c<
0.2, wherein c is determined according to oxidation number of A′
; and
A′
is at least one monovalent or divalent anion.
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Abstract
Disclosed are an electrolyte for a lithium secondary battery which includes a non-aqueous solvent and a lithium salt and a lithium secondary battery including the same. The electrolyte includes 1 to 60 wt % of a cyclic carbonate and 40 to 99 wt % of a linear solvent based on a total weight of the non-aqueous solvent.
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Citations
9 Claims
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1. A lithium secondary battery comprising a cathode comprising a spinel-structure lithium nickel manganese composite oxide represented by Formula 1 below as a cathode active material;
- an anode comprising a lithium metal oxide represented by Formula 2 below as an anode active material; and
an electrolyte comprising a non-aqueous solvent and a lithium salt,wherein the non-aqueous solvent consists of; 1 to 60 wt % of a cyclic carbonate based on a total weight of the non-aqueous solvent, and 40 to 99 wt % of a linear solvent based on a total weight of the non-aqueous solvent, wherein the cyclic carbonate is FEC, and the linear solvent is DMC or MP,
LixMyMn2−
yO4−
zAz
(1)
LiaM′
bO4−
cA′
c
(2)wherein, in Formula 1, 0.9≤
x≤
1.2, 0<
y<
2, and 0≤
z<
0.2;M is at least one element selected from the group consisting of Al, Mg, Ni, Co, Fe, Cr, V, Ti, Cu, B, Ca, Zn, Zr, Nb, Mo, Sr, Sb, W, Ti, and Bi; and A is at least one monovalent or divalent anion, wherein, in Formula 2, M′
is at least one element selected from the group consisting of Ti, Sn, Cu, Pb, Sb, Zn, Fe, In, Al, and Zr;0.1≤
a≤
4 and 0.2≤
b≤
4, wherein a and b are determined according to oxidation number of M′
;0≤
c<
0.2, wherein c is determined according to oxidation number of A′
; andA′
is at least one monovalent or divalent anion. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
- an anode comprising a lithium metal oxide represented by Formula 2 below as an anode active material; and
Specification