Energy storage device
View Patent ↗An energy storage device comprising an anode, electrolyte, and cathode is provided. The cathode comprises a plurality of granules comprising a support material, an active electrode metal, and a salt material, such that the cathode has a granule packing density equal to or greater than about 2 g/cc. A cathode comprising greater than about 10 volume % total metallic content in a charged state of the cathode is also provided.
1. An energy storage device comprising an anode, electrolyte, and cathode, wherein the cathode comprises a plurality of granules comprising a support material, an active electrode metal, and a salt material, wherein the cathode has a granule packing density equal to or greater than about 2 g/cc.
2. The energy storage device of claim 1 , wherein the granule packing density is in a range from about 2.0 g/cc to about 2.7 g/cc.
3. The energy storage device of claim 1 , wherein the plurality of granules has a multimodal size distribution.
4. The energy storage device of claim 3 , wherein the multimodal size distribution is a bimodal distribution.
5. The energy storage device of claim 3 , wherein a first mode of the multimodal size distribution is less than about 250 micrometers.
6. The energy storage device of claim 5 , wherein at least 30 volume % of the plurality of granules in the first mode has median size lower than about 250 micrometers.
7. The energy storage device of claim 6 , wherein at least 50 volume % of the plurality of granules in the first mode has median size lower than about 250 micrometers.
8. The energy storage device of claim 3 , wherein a second mode of the multimodal size distribution is greater than about 250 micrometers.
9. The energy storage device of claim 8 , wherein at least 30 volume % of the plurality of granules in the second mode has median size greater than about 250 micrometers.
10. The energy storage device of claim 9 , wherein at least 50 volume % of the plurality of granules in the second mode has median size greater than about 250 micrometers.
11. The energy storage device of claim 8 , wherein a second mode of the multimodal size distribution is greater than about 500 micrometers.
12. The energy storage device of claim 1 , wherein the support material comprises copper.
13. The energy storage device of claim 12 , wherein the support material comprises zinc and copper.
14. The energy storage device of claim 13 , wherein the support material comprises brass.
15. The energy storage device of claim 1 , wherein the active electrode metal comprises zinc.
16. The energy storage device of claim 1 , wherein the salt material is sodium chloride.
17. An energy storage device comprising an anode, electrolyte, and cathode, wherein the cathode comprises a plurality of granules comprising brass, zinc, and sodium chloride, wherein the granules have a multimodal size distribution, and wherein the cathode has a granule packing density in a range from about 2.0 g/cc to about 2.7 g/cc.