{
  "$type": "site.standard.document",
  "description": "A method and apparatus for storing electrical energy using ensemble electrochemical cells each comprising a cylindrical exterior container, a coiled anodic aluminum wire, carbon graphite cathode, a sandy electrolyte medium, and an ionic electrolyte based on a compound mixture of urea, sea-salt, and…",
  "path": "/patents/1380847",
  "publishedAt": "2026-04-09T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "H01M10/38",
    "Fuel Cells Global LTD"
  ],
  "textContent": "A method and apparatus for storing electrical energy using ensemble electrochemical cells each comprising a cylindrical exterior container, a coiled anodic aluminum wire, carbon graphite cathode, a sandy electrolyte medium, and an ionic electrolyte based on a compound mixture of urea, sea-salt, and water. The invention teaches the use of inexpensive materials and simple assembling of sandy rechargeable cells into a hypogeal battery.",
  "title": "Hypogeal Battery Using Sandy Al-Ion Rechargeable Cells"
}