Solid electrolyte, method for preparing the same, and battery using the same
AssigneeSamsung Electronics Co., Ltd.
InventorsYoung-sin Park, Jong-heun Lee, Young-gu Jin, Seok-soo Lee
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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.
Claims9
A solid electrolyte comprising a composition represented by Formula 1 below:
- 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 lithium battery using a solid electrolyte comprising a composition represented by Formula 1 below:
- 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 thin film battery using a solid electrolyte comprising a composition represented by Formula 1 below:
- 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 a solid electrolyte comprising a composition represented by Formula 1 below:
- 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.
Dependencies are inferred from the claim text.