Negative electrode for electrochemical cell

Abstract

We provide long-term and ultra-long-term (overall, ≥8 hours) energy storage systems. [Solution] Various embodiments may include a battery comprising a first electrode, an electrolyte, and a second electrode ionically conductively connected to the first electrode via the electrolyte. The first electrode comprises direct reduced iron ("DRI") pellets and a conductive material. The conductive material may be scattered between individual DRI pellets. The conductive material has a higher electrical conductivity than the DRI pellets.

Claims

1. First electrode, Electrolytes, and A battery comprising a second electrode ionically connected to the first electrode via the electrolyte, The first electrode comprises a direct reduced iron ("DRI") pellet and a conductive material. The conductive material has a higher electrical conductivity than the DRI pellet. The conductive material is scattered between the individual DRI pellets. battery.

2. The battery according to claim 1, wherein the conductive material includes a conductive wire.

3. The first electrode further includes a current collector, The battery according to claim 2, wherein the conductive wire is connected to the current collector.

4. The battery according to claim 1, wherein the conductive material includes one or more meshes.

5. The battery according to claim 4, wherein one or more of the meshes have openings smaller than the size of the DRI pellet.

6. The battery according to claim 1, wherein the conductive material includes a wool-like conductive material.

7. The battery according to claim 1, wherein the first electrode includes a current collector.

8. The battery according to claim 1, wherein the conductive material includes stainless steel or nickel.

9. The battery according to claim 1, wherein the DRI includes iron ore, directly reduced grade iron ore, reduced taconite, wustite, magnetite, hematite, cementite, iron oxide, or any combination thereof.

10. The battery according to claim 1, wherein the DRI pellet is moistened with the electrolyte.

11. The battery according to claim 1, wherein the electrolyte comprises a gel.

12. The battery according to claim 11, wherein the gel comprises a network-forming oxide dissolved in an alkaline liquid.

13. The network-forming oxide is boric acid (B ２ O ３ ) or alumina (Al ２ O ３ The battery according to claim 12, comprising )

14. The battery according to claim 11, wherein the gel comprises network-forming organic molecules dispersed in a liquid electrolyte.

15. The aforementioned electrolyte is... The battery according to claim 1, which can be formed into a gel-like state by dissolving silica from the DRI pellet.

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