Solid electrolyte, method for preparing the same, and battery using the same
First Claim
Patent Images
1. A solid electrolyte comprising a composition represented by Formula 1 below:
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aLi2O-bB2O3-cM-dX
(1)wherein M is at least one selected from the group consisting of TiO2, V2O5, WO3, and Ta2O5;
X is at least one selected from LiCl and Li2SO4;
0.4<
a<
0.55;
0.4<
b<
0.55;
0.02<
c<
0.05;
a+b+c=1, and 0≦
d<
0.2.
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0 Petitions
Accused Products
Abstract
A solid electrolyte including a composition represented by Formula 1 below is provided: aLi2O-bB2O3-cM-dX (1) wherein M is at least one selected from the group consisting of TiO2, V2O5, WO3, and Ta2O5; X is at least one selected from LiCl and Li2SO4; 0.4<a<0.55; 0.4<b<0.55; 0.02<c<0.05; a+b+c=1, and 0≦d<0.2. A method for preparing the solid electrolyte and a battery using the solid electrolyte are also provided. The solid electrolyte exhibits high ionic conductivity. Lithium and thin film batteries using the solid electrolyte are improved in charge/discharge rate, power output, and cycle life.
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Citations
9 Claims
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1. A solid electrolyte comprising a composition represented by Formula 1 below:
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aLi2O-bB2O3-cM-dX
(1)wherein M is at least one selected from the group consisting of TiO2, V2O5, WO3, and Ta2O5; X is at least one selected from LiCl and Li2SO4; 0.4<
a<
0.55;
0.4<
b<
0.55;
0.02<
c<
0.05;
a+b+c=1, and 0≦
d<
0.2. - View Dependent Claims (2)
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3. A lithium battery using a solid electrolyte comprising a composition represented by Formula 1 below:
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aLi2O-bB2O3-cM-dX
(1)wherein M is at least one selected from the group consisting of TiO2, V2O5, WO3, and Ta2O5; X is at least one selected from LiCl and Li2SO4; 0.4<
a<
0.55;
0.4<
b<
0.55;
0.02<
c<
0.05;
a+b+c=1, and 0≦
d<
0.2.
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4. A thin film battery using a solid electrolyte comprising a composition represented by Formula 1 below:
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aLi2O-bB2O3-cM-dX
(1)wherein M is at least one selected from the group consisting of TiO2, V2O5, WO3, and Ta2O5; X is at least one selected from LiCl and Li2SO4; 0.4<
a<
0.55;
0.4<
b<
0.55;
0.02<
c<
0.05;
a+b+c=1, and 0≦
d<
0.2.
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5. A method for preparing a solid electrolyte comprising a composition represented by Formula 1 below:
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aLi2O-bB2O3-cM-dX
(1)wherein M is at least one selected from the group consisting of TiO2, V2O5, WO3, and Ta2O5; X is at least one selected from LiCl and Li2SO4; 0.4<
a<
0.55;
0.4<
b<
0.55;
0.02<
c<
0.05;
a+b+c=1, and 0≦
d<
0.2,the method comprising; (a) mixing a Li2O precursor compound;
B2O3; and
at least one compound selected from the group consisting of TiO2, V2O5, WO3, and Ta2O5, followed by milling;(b) heating the resultant powder mixture so that the Li2O precursor compound is thermally decomposed into Li2O; (c) heating the resultant mixture to obtain a uniformly molten glass; and (d) quenching the molten glass to obtain a glassy solid electrolyte. - View Dependent Claims (6, 7, 8, 9)
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Specification