{
  "node": {
    "id": "term:ceramic-coated-separator",
    "type": "Term",
    "label": "Ceramic-coated separator",
    "properties": {
      "id": "ceramic-coated-separator",
      "name": "Ceramic-coated separator",
      "section": "topic-electrolytes",
      "definition": "A polyolefin separator coated with a thin layer of alumina or boehmite particles. The ceramic raises the temperature at which the film shrinks, so the electrodes stay apart longer in a thermal event.",
      "related": [
        "separator",
        "separator-shutdown",
        "thermal-runaway"
      ],
      "url": "https://lemonergy.com/learn/glossary/ceramic-coated-separator/",
      "mentions": [
        "polyethylene-polypropylene"
      ]
    }
  },
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      "source": "term:ceramic-coated-separator",
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    {
      "id": "edge:492",
      "source": "term:ceramic-coated-separator",
      "target": "term:separator",
      "type": "relatedTo",
      "properties": {
        "sourceFile": "terms.json",
        "meaning": "Related context; not a causal claim"
      }
    },
    {
      "id": "edge:493",
      "source": "term:ceramic-coated-separator",
      "target": "term:separator-shutdown",
      "type": "relatedTo",
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        "sourceFile": "terms.json",
        "meaning": "Related context; not a causal claim"
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      "target": "term:thermal-runaway",
      "type": "relatedTo",
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        "meaning": "Related context; not a causal claim"
      }
    },
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      "target": "term:polyethylene-polypropylene",
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      "id": "topic:topic-electrolytes",
      "type": "Topic",
      "label": "Electrolytes and separators",
      "properties": {
        "id": "topic-electrolytes",
        "name": "Electrolytes and separators",
        "lede": "What sits between the electrodes: liquid, gel and solid electrolytes, their salts, solvents and additives, and the separator that keeps the electrodes apart.",
        "context": "Connect transport with electronic isolation.",
        "example": "Greater liquid uptake may improve wetting while changing mechanical behavior. Several properties define separator performance.",
        "lesson_url": "https://lemonergy.com/learn/fundamentals/cell-anatomy/",
        "lesson_label": "Open cell anatomy"
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      "id": "term:separator",
      "type": "Term",
      "label": "Separator",
      "properties": {
        "id": "separator",
        "name": "Separator",
        "section": "topic-electrolytes",
        "definition": "A porous, electronically insulating film between the electrodes. Electrons cannot cross it; ions move through the electrolyte in its pores.",
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          "electrolyte",
          "ceramic-coated-separator",
          "separator-shutdown",
          "internal-short-circuit",
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        "example": {
          "title": "Different conduction paths",
          "text": "A separator prevents direct electronic contact while permitting ionic transport through its electrolyte-filled structure."
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        "mentions": []
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      "id": "term:separator-shutdown",
      "type": "Term",
      "label": "Separator shutdown",
      "properties": {
        "id": "separator-shutdown",
        "name": "Separator shutdown",
        "section": "topic-safety",
        "definition": "A built-in safety feature of polyolefin separators: around 130 °C the polyethylene layer melts and closes its pores, stopping ion flow and the current with it. It helps only if the separator does not also shrink and let the electrodes touch, so shutdown behavior is not universal.",
        "related": [
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        "mentions": [
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      "id": "term:thermal-runaway",
      "type": "Term",
      "label": "Thermal runaway",
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        "name": "Thermal runaway",
        "section": "topic-safety",
        "definition": "Self-accelerating heating in a cell: heat speeds up reactions that release more heat, until the cell vents, catches fire or ruptures. An internal short, overcharge or external heating can trigger it.",
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        "url": "https://lemonergy.com/learn/glossary/thermal-runaway/",
        "mentions": [
          "overcharge"
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    },
    {
      "id": "term:polyethylene-polypropylene",
      "type": "Term",
      "label": "Polyethylene and polypropylene",
      "properties": {
        "id": "polyethylene-polypropylene",
        "name": "Polyethylene and polypropylene",
        "abbr": "PE, PP",
        "aka": [
          "polyolefin",
          "polyethylene",
          "polypropylene"
        ],
        "section": "topic-electrolytes",
        "definition": "The two commodity polyolefins of a cell. Almost every separator is PE, PP or a layered combination: PE melts near 130 °C and closes its pores, while PP keeps its shape to about 165 °C. PP also forms the heat-sealing inner layer of pouch foil, and both appear in packs as insulating films and moulded parts.",
        "related": [
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        "mentions": []
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  ]
}