Electrodes and battery cells
First Claim
1. A rechargeable battery comprising a positive electrode, a solid electrolyte and a negative electrode comprising a ceramic electrode body comprising a ternary oxide material, the negative electrode undergoing on charging and discharging of the battery an electrode chemical reaction involving no change of phase, wherein the ternary oxide material is selected from the group consisting of cadmium germanate, zinc stannate, barium stannate, magnesium stannate, barium germanate, magnesium germanate and lead germanate.
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Abstract
Ceramic electrodes of cadmium germanate and other ternary oxide materials, provide electrodes for secondary battery cells. Open circuit voltages of 1.5 volts are attainable. The absence of crystallographic phase changes on charge/discharge is noted and renders possible the use of solid electrolytes, possibly in a unitary ceramic structure.
13 Citations
23 Claims
- 1. A rechargeable battery comprising a positive electrode, a solid electrolyte and a negative electrode comprising a ceramic electrode body comprising a ternary oxide material, the negative electrode undergoing on charging and discharging of the battery an electrode chemical reaction involving no change of phase, wherein the ternary oxide material is selected from the group consisting of cadmium germanate, zinc stannate, barium stannate, magnesium stannate, barium germanate, magnesium germanate and lead germanate.
- 5. A rechargeable battery comprising a positive electrode, an electrolyte and a negative electrode comprising a ceramic electrode body comprising a ternary oxide material, the negative electrode undergoing on charging and discharging of the battery an electrode chemical reaction involving no change in crystallographic structure phase and the battery providing an open cell voltage of at least 1.50 volts, wherein the ternary oxide material is selected from the group consisting of zinc stannate, lead stannate, barium stannate, magnesium stannate, barium germanate, and lead germanate.
- 7. A rechargeable battery comprising a positive electrode, an electrolyte and a negative electrode, the negative electrode having as electroactive material a ternary oxide selecting from the group consisting of cadmium germanate, zinc stannate, lead stannate, barium stannate, magnesium stannate, magnesium germanate, barium germanate and lead germanate.
- 9. A rechargeable battery comprising a positive electrode, an electrolyte and a negative electrode comprising a ceramic electrode body comprising a ternary oxide material, wherein the ternary oxide material is selected from the group consisting of cadmium germanate, zinc stannate, barium stannate, magnesium stannate, barium germanate, magnesium germanate and lead germanate.
Specification