Negative electrode for a rechargeable lithium battery comprising a solid solution of titanium dioxide and tin dioxide
First Claim
1. An anode active composition for a negative electrode of a rechargeable lithium battery capable of reversibly intercalating lithium ions, comprising a solid solution of titanium dioxide and tin dioxide, said solid solution containing titanium dioxide and tin dioxide in amounts such that the ratio of titanium to tin in the solid solution corresponds to an intermetallic compound composition range of one of the compounds selected from the group consisting of Ti3 Sn, Ti2 Sn, Ti5 Sn3 and Ti6 Sn5.
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Abstract
Solid solution of titanium dioxide and tin dioxide is utilized as the anode active substance in the negative electrode of a rechargeable lithium battery. The lithium battery comprised of a negative electrode containing particles of titanium dioxide-tin dioxide solid solution, a non-aqueous lithium ion bearing electrolyte and a positive electrode, usually made of a lithium containing chalcogenide compound provides stable voltage, has high reversible anode capacity and high energy density.
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Citations
10 Claims
- 1. An anode active composition for a negative electrode of a rechargeable lithium battery capable of reversibly intercalating lithium ions, comprising a solid solution of titanium dioxide and tin dioxide, said solid solution containing titanium dioxide and tin dioxide in amounts such that the ratio of titanium to tin in the solid solution corresponds to an intermetallic compound composition range of one of the compounds selected from the group consisting of Ti3 Sn, Ti2 Sn, Ti5 Sn3 and Ti6 Sn5.
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4. A rechargeable lithium battery comprising:
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i) a negative electrode containing an anode active component comprising a solid solution of titanium dioxide and tin dioxide capable of reversibly intercalating lithium ions and having a composition range of TiO2 ;
SnO2 between 90;
10 and 5;
95 in weight;ii) a positive electrode comprising a lithiated transition metal chalcogenide compound as cathode active component; iii) a lithium ion bearing non-aqueous electrolyte; iv) a first current collector in contact with said negative electrode and a second current collector in contact with said positive electrode; and v) electrical leads and at least one moisture impervious layer for packaging and sealing said rechargeable lithium battery. - View Dependent Claims (5, 6, 7, 8, 9, 10)
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Specification