High performance energy storage devices
View Patent ↗A lead-acid battery comprising: at least one lead-based negative electrode; at least one lead dioxide-based positive electrode; at least one capacitor electrode; and electrolyte in contact with the electrodes; wherein a battery part is formed by the lead based negative electrode and the lead dioxide-based positive electrode; and an asymmetric capacitor part is formed by the capacitor electrode and one electrode selected from the lead based negative electrode and the lead-dioxide based positive electrode; and wherein all negative electrodes are connected to a negative busbar, and all positive electrodes are connected to a positive busbar. The capacitor electrode may be a capacitor negative electrode comprising carbon and an additive mixture selected from oxides, hydroxides or sulfates of lead, zinc, cadmium, silver and bismuth, or a capacitor negative electrode comprising carbon, red lead, antimony in oxide, hydroxide or sulfate form, and optionally other additives. The capacitor electrode may be used in asymmetric capacitors and batteries of other types.
1. A lead-acid battery comprising:
at least one lead-based negative electrode;
at least one lead dioxide-based positive electrode;
at least one capacitor electrode; and
electrolyte in contact with the electrodes;
wherein a battery part is formed by the lead based negative electrode and the lead dioxide-based positive electrode; and an asymmetric capacitor part is formed by the capacitor electrode and one electrode selected from the lead based negative electrode and the lead-dioxide based positive electrode; and wherein all negative electrodes are connected to a negative busbar, and all positive electrodes are connected to a positive busbar.
2. The lead-acid battery of claim 1 , wherein the electrodes alternate between positive and negative electrodes.
3. The lead-acid battery of claim 1 , wherein the capacitor electrode comprises a high surface area material selected from carbon, ruthenium oxide, silver oxide, cobalt oxide and conducting polymers.
4. The lead-acid battery of claim 3 , wherein the high surface area material is a high surface area carbon material.
5. The lead-acid battery of claim 4 , wherein the high surface area material is activated carbon.
6. The lead-acid battery of claim 5 , wherein the activated carbon material has a surface area of between 1000 and 2500 m 2 /g.
7. The lead-acid battery of claim 4 , wherein the capacitor electrode further comprises carbon black.
8. The lead-acid battery of claim 7 , wherein the capacitor electrode comprises a coating comprising between 5-20% carbon black, 40-80% activated carbon, 0-10% carbon fibres, and 5-25% binder.
9. The lead-acid battery of claim 1 , wherein the lead-acid battery comprises at least one capacitor negative electrode comprising a high surface area active material and an additive or additive mixture comprising an oxide, hydroxide or sulfate of lead, zinc, cadmium, silver and bismuth, or a mixture thereof.
10. The lead-acid battery of claim 9 , wherein the additive includes at least one oxide, hydroxide or sulfate of lead or zinc.
11. The lead-acid battery of claim 9 , wherein the additive is present in a coating on the capacitor negative electrode in an amount that increases the potential window of the capacitor negative electrode to at least −1.2V.
12. The lead-acid battery of claim 9 , wherein the total additive content is between 5-40 wt %, based on the total capacitor coating composition.
13. The lead-acid battery of claim 9 , wherein the negative capacitor electrode additive comprises the compounds of the following metals in oxide, sulfate or hydroxide from: between 1-40 wt % Pb,; 1-20 wt % Zn; 0-5 wt % Cd and 0-5 wt % Ag.
14. The lead-acid battery of claim 1 , wherein the lead-acid battery comprises at least one capacitor positive electrode comprising:
a high surface area capacitor material, and a capacitor positive electrode additive comprising:
Pb 2 O 3 ,
an oxide, hydroxide or sulfate of antimony, and
optionally one or more additives selected from oxides, hydroxides and sulfates of iron and lead.
15. The lead-acid battery of claim 14 , wherein capacitor positive electrode additive is present in amount increases the potential window of the capacitor positive electrode to at least +1.2V.
16. The lead-acid battery of claim 14 , wherein the capacitor positive electrode additive is present in an amount of 5-40 wt % based on the total capacitor positive electrode coating composition.
17. The lead-acid battery of claim 14 , wherein the positive capacitor electrode additive comprises between 0-30 wt % Pb in oxide, sulfate or hydroxide form, 1-10 wt % Pb 2 O 3 , 0-2 wt % Fe in oxide, sulfate or hydroxide form and 0.05 to 1 wt % Sb in oxide, sulfate or hydroxide form.
18. The lead-acid battery of claim 1 , wherein the lead-acid battery comprises a negative electrode with at least two regions, including a battery-electrode material region and a capacitor-electrode material region.
19. The lead-acid battery of claim 18 , wherein the negative electrode comprises a lead-based battery electrode material region on one face, and a capacitor negative electrode material region on the opposite face.
20. The lead-acid battery of claim 1 , wherein the asymmetric capacitor part has ultracapacitor capacitance.
21. The lead-acid battery of claim 1 , wherein the asymmetric capacitor part has supercapacitor capacitance.
22. The lead-acid battery of claim 1 , wherein the electrolyte is sulphuric acid.
23. The lead-acid battery of claim 1 , wherein each of the positive and negative electrodes is separated from adjacent electrodes by porous separators.
24. The lead-acid battery of claim 23 , wherein the separators located between adjacent lead-based negative electrodes and lead dioxide-based positive electrodes have a thickness of between 1 and 2.5 millimeters.
25. The lead-acid battery of claim 23 , wherein the separators located in contact with a capacitor electrode surface have a thickness of between 0.01 and 0.1.
26. The lead-acid battery of claim 1 , wherein the lead-acid battery comprises a negative electrode with at least two regions, including a battery-electrode material region and a capacitor-electrode material region.
27. The lead-acid battery of claim 26 , wherein the negative electrode comprises a lead-based battery electrode material region on one face, and a capacitor negative electrode material region on the opposite face.
28. A lead-acid battery comprising:
at least one lead-based negative electrode,
at least one lead dioxide-based positive electrode,
at least one capacitor negative electrode, and
electrolyte in contact with the electrodes,
wherein the positive electrode and the lead-based negative electrode define a battery part, and the positive electrode and the capacitor negative electrode define an asymmetric capacitor part, with the positive electrode shared by the battery part and the asymmetric capacitor part, and wherein the lead-based negative and capacitor negative electrodes are connected to a negative busbar, and the positive electrode or electrodes are connected to a positive busbar.
29. The lead-acid battery of claim 28 , wherein the electrodes alternate between positive and negative electrodes.
30. The lead-acid battery of claim 28 , wherein the capacitor electrode comprises a high surface area carbon material.
31. The lead-acid battery of claim 28 , wherein the capacitor negative electrode comprises a high surface area active material and an additive or additive mixture comprising an oxide, hydroxide or sulfate of lead, zinc, cadmium, silver and bismuth, or a mixture thereof.
32. The lead-acid battery of claim 31 , wherein the additive includes at least one oxide, hydroxide or sulfate of lead or zinc.
33. The lead-acid battery of claim 31 , wherein the additive is present in a coating on the capacitor negative electrode in an amount that increases the potential window of the capacitor negative electrode to at least −1.2V.
34. The lead-acid battery of claim 31 , wherein the total additive content is between 5-40 wt %, based on the total capacitor coating composition.
35. The lead-acid battery of claim 31 , wherein the negative capacitor electrode additive comprises the compounds of the following metals in oxide, sulfate or hydroxide from: between 1-40 wt % Pb; 1-20 wt % Zn; 0-5 wt % Cd and 0-5 wt % Ag.
36. The lead-acid battery of claim 28 , wherein the lead-acid battery comprises at least one capacitor positive electrode comprising:
a high surface area capacitor material, and a capacitor positive electrode additive comprising:
Pb 2 O 3 ,
an oxide, hydroxide or sulfate of antimony, and
optionally one or more additives selected from oxides, hydroxides and sulfates of iron and lead.
37. The lead-acid battery of claim 36 , wherein the capacitor positive electrode additive is present in an amount of 5-40 wt %.
38. The lead-acid battery of claim 36 , wherein the positive capacitor electrode additive comprises between 0-30 wt % Pb in oxide, sulfate or hydroxide form, 1-10 wt % Pb 2 O 3 , 0-2 wt % Fe in oxide, sulfate or hydroxide form and 0.05 to 1 wt % Sb in oxide, sulfate or hydroxide form.
39. The lead-acid battery of claim 28 , wherein the asymmetric capacitor part has ultracapacitor capacitance.
40. The lead-acid battery of claim 28 , wherein the asymmetric capacitor part has supercapacitor capacitance.
41. The lead-acid battery of claim 28 , wherein the electrolyte is sulphuric acid.
42. The lead-acid battery of claim 28 , wherein each of the positive and negative electrodes is separated from adjacent electrodes by porous separators.
43. The lead-acid battery of claim 42 , wherein the separators located between adjacent lead-based negative electrodes and lead dioxide-based positive electrodes have a thickness of between 1 and 2.5 millimeters.
44. The lead-acid battery of claim 42 , wherein the separators located in contact with a capacitor electrode surface have a thickness of between 0.01 and 0.1.
45. A lead-acid battery comprising an alternating series of positive and negative electrodes and an electrolyte in contact with the electrodes, wherein:
at least one pair of adjacent positive and negative electrode regions store energy capacitively, and
at least one pair of adjacent lead dioxide positive and lead negative battery electrode regions store energy electrochemically,
and wherein the positive electrodes are directly connected by a first conductor and the negative electrodes are directly connected by a second conductor.
46. The lead-acid battery of claim 45 , wherein one of the positive and negative electrode regions is a capacitor electrode region.
47. The lead-acid battery of claim 46 , wherein the capacitor electrode region comprises a high surface area carbon material.
48. The lead-acid battery of claim 47 , wherein the capacitor electrode region is a negative capacitor electrode region, and comprises a high surface area carbon material and an additive or additive mixture comprising an oxide, hydroxide or sulfate of lead, zinc, cadmium, silver and bismuth, or a mixture thereof.
49. The lead-acid battery of claim 48 , wherein the additive includes at least one oxide, hydroxide or sulfate of lead or zinc.
50. The lead-acid battery of claim 48 , wherein the total additive content is between 5-40 wt %.
51. The lead-acid battery of claim 47 , wherein the negative capacitor electrode additive comprises compounds of the following metals in oxide, sulfate or hydroxide from: between 1-40 wt % Pb; 1-20 wt % Zn; 0-5 wt % Cd and 0-5 wt % Ag.
52. The lead-acid battery of claim 47 , wherein the capacitor electrode region is a positive capacitor electrode region, and comprises:
a high surface area capacitor material, and a capacitor positive electrode additive comprising:
Pb 2 O 3 ,
an oxide, hydroxide or sulfate of antimony, and
optionally one or more additives selected from oxides, hydroxides and sulfates of iron and lead.
53. The lead-acid battery of claim 52 , wherein the capacitor positive electrode additive is present in an amount of 5-40 wt %.
54. The lead-acid battery of claim 52 , wherein the positive capacitor electrode additive comprises between 0-30 wt % Pb in oxide, sulfate or hydroxide form, 1-10 wt % Pb 2 O 3 , 0-2 wt % Fe in oxide, sulfate or hydroxide form and 0.05 to 1 wt % Sb in oxide, sulfate or hydroxide form.
55. The lead-acid battery of claim 45 , wherein the lead negative battery region is on one face of a negative electrode, and a negative capacitor material region is on the opposite face of the negative electrode.
56. The lead-acid battery of claim 45 , wherein the electrolyte is sulphuric acid.
57. The lead-acid battery of claim 45 , wherein each of the positive and negative electrodes is separated from adjacent electrodes by porous separators.
58. The lead-acid battery of claim 57 , wherein the separators located between adjacent lead-based negative electrode regions and lead dioxide-based positive electrode regions have a thickness of between 1 and 2.5 millimeters.
59. The lead-acid battery of claim 57 , wherein the separators located in contact with a capacitor electrode region have a thickness of between 0.01 and 0.1.