{
  "node": {
    "id": "term:delamination",
    "type": "Term",
    "label": "Delamination",
    "properties": {
      "id": "delamination",
      "name": "Delamination",
      "section": "topic-aging",
      "definition": "Separation of the electrode coating from its current collector, or of layers within a cell, which cuts the electronic path to part of the electrode. It is caused by poor adhesion, binder degradation, gas pockets or repeated swelling.",
      "related": [
        "binder-degradation",
        "coating",
        "swelling",
        "loss-of-active-material",
        "electrode-peel-test"
      ],
      "url": "https://lemonergy.com/learn/glossary/delamination/",
      "mentions": [
        "electrode",
        "binder",
        "current-collector",
        "electronic-path"
      ]
    }
  },
  "edges": [
    {
      "id": "edge:1559",
      "source": "term:delamination",
      "target": "topic:topic-aging",
      "type": "belongsTo",
      "properties": {
        "sourceFile": "terms.json"
      }
    },
    {
      "id": "edge:1560",
      "source": "term:delamination",
      "target": "term:binder-degradation",
      "type": "relatedTo",
      "properties": {
        "sourceFile": "terms.json",
        "meaning": "Related context; not a causal claim"
      }
    },
    {
      "id": "edge:1561",
      "source": "term:delamination",
      "target": "term:coating",
      "type": "relatedTo",
      "properties": {
        "sourceFile": "terms.json",
        "meaning": "Related context; not a causal claim"
      }
    },
    {
      "id": "edge:1562",
      "source": "term:delamination",
      "target": "term:swelling",
      "type": "relatedTo",
      "properties": {
        "sourceFile": "terms.json",
        "meaning": "Related context; not a causal claim"
      }
    },
    {
      "id": "edge:1563",
      "source": "term:delamination",
      "target": "term:loss-of-active-material",
      "type": "relatedTo",
      "properties": {
        "sourceFile": "terms.json",
        "meaning": "Related context; not a causal claim"
      }
    },
    {
      "id": "edge:1564",
      "source": "term:delamination",
      "target": "term:electrode-peel-test",
      "type": "relatedTo",
      "properties": {
        "sourceFile": "terms.json",
        "meaning": "Related context; not a causal claim"
      }
    },
    {
      "id": "edge:mentions/delamination/electrode",
      "source": "term:delamination",
      "target": "term:electrode",
      "type": "mentions",
      "properties": {
        "sourceFile": "terms.json",
        "method": "build_glossary.mention_index + mentions",
        "field": "definition",
        "meaning": "Text mention; not a causal claim"
      }
    },
    {
      "id": "edge:mentions/delamination/binder",
      "source": "term:delamination",
      "target": "term:binder",
      "type": "mentions",
      "properties": {
        "sourceFile": "terms.json",
        "method": "build_glossary.mention_index + mentions",
        "field": "definition",
        "meaning": "Text mention; not a causal claim"
      }
    },
    {
      "id": "edge:mentions/delamination/current-collector",
      "source": "term:delamination",
      "target": "term:current-collector",
      "type": "mentions",
      "properties": {
        "sourceFile": "terms.json",
        "method": "build_glossary.mention_index + mentions",
        "field": "definition",
        "meaning": "Text mention; not a causal claim"
      }
    },
    {
      "id": "edge:mentions/delamination/electronic-path",
      "source": "term:delamination",
      "target": "term:electronic-path",
      "type": "mentions",
      "properties": {
        "sourceFile": "terms.json",
        "method": "build_glossary.mention_index + mentions",
        "field": "definition",
        "meaning": "Text mention; not a causal claim"
      }
    }
  ],
  "neighbors": [
    {
      "id": "topic:topic-aging",
      "type": "Topic",
      "label": "Aging and degradation",
      "properties": {
        "id": "topic-aging",
        "name": "Aging and degradation",
        "lede": "Why a cell loses capacity and gains resistance, and the mechanisms behind it.",
        "context": "Separate mechanisms, observations and fitted models.",
        "example": "Capacity loss and resistance rise can have different causes; a film-growth curve cannot identify both.",
        "lesson_url": "https://lemonergy.com/learn/fundamentals/battery-aging/",
        "lesson_label": "Open aging"
      }
    },
    {
      "id": "term:binder-degradation",
      "type": "Term",
      "label": "Binder degradation",
      "properties": {
        "id": "binder-degradation",
        "name": "Binder degradation",
        "section": "topic-aging",
        "definition": "Loss of the binder’s ability to hold particles to each other and to the foil, from swelling in electrolyte, repeated strain or heat. Particles that lose contact stop storing lithium, and the coating can delaminate from the foil.",
        "related": [
          "binder",
          "loss-of-active-material",
          "delamination"
        ],
        "url": "https://lemonergy.com/learn/glossary/binder-degradation/",
        "mentions": [
          "electrolyte",
          "swelling",
          "coating"
        ]
      }
    },
    {
      "id": "term:coating",
      "type": "Term",
      "label": "Coating",
      "properties": {
        "id": "coating",
        "name": "Coating",
        "section": "topic-manufacturing",
        "definition": "Applying slurry to the moving foil at a controlled wet thickness, usually with a slot die, often on both sides. Coating weight per area must be held within about one percent across the web, because every downstream property depends on it.",
        "related": [
          "slot-die",
          "areal-loading",
          "drying",
          "electrode-manufacturing"
        ],
        "lesson": "fundamentals/cell-production/#electrodes",
        "example": {
          "title": "Wet and dry thickness differ",
          "text": "Wet coating includes solvent. Dry thickness also depends on retained solids and resulting structure."
        },
        "url": "https://lemonergy.com/learn/glossary/coating/",
        "mentions": [
          "slurry"
        ]
      }
    },
    {
      "id": "term:swelling",
      "type": "Term",
      "label": "Swelling",
      "properties": {
        "id": "swelling",
        "name": "Swelling",
        "section": "topic-aging",
        "definition": "Growth in a cell’s thickness, reversibly as the electrodes expand on charge and irreversibly as gas and SEI accumulate. Packs allow for it with compression pads, and a sudden swell in service is a warning sign.",
        "related": [
          "gas-generation",
          "pouch-cell",
          "silicon-anode",
          "stack-pressure",
          "compression-pad",
          "swelling-test"
        ],
        "url": "https://lemonergy.com/learn/glossary/swelling/",
        "mentions": [
          "sei"
        ]
      }
    },
    {
      "id": "term:loss-of-active-material",
      "type": "Term",
      "label": "Loss of active material",
      "properties": {
        "id": "loss-of-active-material",
        "name": "Loss of active material",
        "abbr": "LAM",
        "section": "topic-aging",
        "definition": "The degradation mode in which electrode material becomes unable to store lithium: particles crack and lose electronic contact, structures collapse, or transition metals dissolve. It is tracked separately for each electrode.",
        "related": [
          "particle-cracking",
          "transition-metal-dissolution",
          "loss-of-lithium-inventory",
          "capacity-fade"
        ],
        "url": "https://lemonergy.com/learn/glossary/loss-of-active-material/",
        "mentions": [
          "electrode",
          "aging-mechanism"
        ]
      }
    },
    {
      "id": "term:electrode-peel-test",
      "type": "Term",
      "label": "Electrode peel test",
      "properties": {
        "id": "electrode-peel-test",
        "name": "Electrode peel test",
        "aka": [
          "peel test",
          "adhesion test",
          "90° peel test",
          "180° peel test"
        ],
        "section": "topic-testing",
        "definition": "Pulling an adhesive tape stuck to a coated electrode away at 90° or 180° while recording the force per unit width, in N/m, to measure how firmly the coating holds to the foil and to itself. It checks binder content, drying and calendering, since weak adhesion leads to flaking during winding and to delamination in service.",
        "unit": "N/m",
        "related": [
          "binder",
          "delamination",
          "binder-migration",
          "calendering",
          "coating"
        ],
        "url": "https://lemonergy.com/learn/glossary/electrode-peel-test/",
        "mentions": [
          "electrode",
          "drying",
          "winding"
        ]
      }
    },
    {
      "id": "term:electrode",
      "type": "Term",
      "label": "Electrode",
      "properties": {
        "id": "electrode",
        "name": "Electrode",
        "section": "topic-components",
        "definition": "A solid conductor where the cell’s reaction happens, in contact with the electrolyte. A lithium-ion cell has a negative electrode and a positive electrode, each a porous coating on a metal foil.",
        "related": [
          "negative-electrode",
          "positive-electrode",
          "porous-electrode",
          "current-collector"
        ],
        "lesson": "fundamentals/cell-anatomy/#components",
        "example": {
          "title": "Two transport paths",
          "text": "Electrons need connected solid paths to the collector; ions need electrolyte paths to reaction sites. More of one constituent displaces others at fixed volume."
        },
        "url": "https://lemonergy.com/learn/glossary/electrode/",
        "mentions": [
          "electrolyte",
          "coating"
        ]
      }
    },
    {
      "id": "term:binder",
      "type": "Term",
      "label": "Binder",
      "properties": {
        "id": "binder",
        "name": "Binder",
        "section": "topic-components",
        "definition": "A polymer that holds electrode particles to each other and to the foil — typically PVDF for positive electrodes and CMC with SBR for graphite. It stores no charge, so cell designers use as little as the electrode needs.",
        "related": [
          "active-material",
          "conductive-additive",
          "slurry",
          "pvdf",
          "nmp",
          "paa"
        ],
        "lesson": "fundamentals/cell-architecture/#composite",
        "example": {
          "title": "Balance coating functions",
          "text": "Increasing binder fraction at fixed coating mass leaves less mass for active material and conductive additive. Adhesion and capacity are separate design considerations."
        },
        "url": "https://lemonergy.com/learn/glossary/binder/",
        "mentions": [
          "electrode",
          "graphite",
          "cmc",
          "sbr"
        ]
      }
    },
    {
      "id": "term:current-collector",
      "type": "Term",
      "label": "Current collector",
      "properties": {
        "id": "current-collector",
        "name": "Current collector",
        "section": "topic-components",
        "definition": "The thin metal foil that carries electrons between an electrode and the external circuit — usually copper on the negative side and aluminium on the positive side.",
        "related": [
          "copper-foil",
          "aluminium-foil",
          "tab",
          "electronic-path"
        ],
        "lesson": "fundamentals/cell-anatomy/#components",
        "example": {
          "title": "Follow current to a tab",
          "text": "Current converges through foil toward the tab. The collector contributes mass and resistance without being the principal active material."
        },
        "url": "https://lemonergy.com/learn/glossary/current-collector/",
        "mentions": [
          "electrode"
        ]
      }
    },
    {
      "id": "term:electronic-path",
      "type": "Term",
      "label": "Electronic path",
      "properties": {
        "id": "electronic-path",
        "name": "Electronic path",
        "section": "topic-electrochemistry",
        "definition": "The route electrons take during operation: from active particle through carbon additive to the foil, out through the tab and the external circuit, and back in at the other electrode. Everything on it adds resistance.",
        "related": [
          "ionic-path",
          "current-collector",
          "conductive-additive",
          "internal-resistance"
        ],
        "lesson": "fundamentals/cell-anatomy/#discharge",
        "url": "https://lemonergy.com/learn/glossary/electronic-path/",
        "mentions": [
          "electrode"
        ]
      }
    }
  ]
}