{
  "node": {
    "id": "term:electrode-wrinkling",
    "type": "Term",
    "label": "Electrode wrinkling and buckling",
    "properties": {
      "id": "electrode-wrinkling",
      "name": "Electrode wrinkling and buckling",
      "aka": [
        "wrinkling",
        "buckling",
        "foil wrinkles",
        "jelly-roll deformation"
      ],
      "section": "topic-manufacturing",
      "definition": "Out-of-plane waves or folds in an electrode. In production they come from calendering, where the coated area stretches more than the bare foil edge, and from uneven web tension in winding; in service, electrode expansion can buckle a tightly wound jelly roll. Wrinkles leave uneven gaps and pressure that cause local lithium plating or separator damage.",
      "related": [
        "calendering",
        "winding",
        "jelly-roll",
        "lithium-plating",
        "swelling"
      ],
      "url": "https://lemonergy.com/learn/glossary/electrode-wrinkling/",
      "mentions": [
        "electrode",
        "separator"
      ]
    }
  },
  "edges": [
    {
      "id": "edge:4855",
      "source": "term:electrode-wrinkling",
      "target": "topic:topic-manufacturing",
      "type": "belongsTo",
      "properties": {
        "sourceFile": "terms.json"
      }
    },
    {
      "id": "edge:4856",
      "source": "term:electrode-wrinkling",
      "target": "term:calendering",
      "type": "relatedTo",
      "properties": {
        "sourceFile": "terms.json",
        "meaning": "Related context; not a causal claim"
      }
    },
    {
      "id": "edge:4857",
      "source": "term:electrode-wrinkling",
      "target": "term:winding",
      "type": "relatedTo",
      "properties": {
        "sourceFile": "terms.json",
        "meaning": "Related context; not a causal claim"
      }
    },
    {
      "id": "edge:4858",
      "source": "term:electrode-wrinkling",
      "target": "term:jelly-roll",
      "type": "relatedTo",
      "properties": {
        "sourceFile": "terms.json",
        "meaning": "Related context; not a causal claim"
      }
    },
    {
      "id": "edge:4859",
      "source": "term:electrode-wrinkling",
      "target": "term:lithium-plating",
      "type": "relatedTo",
      "properties": {
        "sourceFile": "terms.json",
        "meaning": "Related context; not a causal claim"
      }
    },
    {
      "id": "edge:4860",
      "source": "term:electrode-wrinkling",
      "target": "term:swelling",
      "type": "relatedTo",
      "properties": {
        "sourceFile": "terms.json",
        "meaning": "Related context; not a causal claim"
      }
    },
    {
      "id": "edge:mentions/electrode-wrinkling/electrode",
      "source": "term:electrode-wrinkling",
      "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/electrode-wrinkling/separator",
      "source": "term:electrode-wrinkling",
      "target": "term:separator",
      "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-manufacturing",
      "type": "Topic",
      "label": "Manufacturing",
      "properties": {
        "id": "topic-manufacturing",
        "name": "Manufacturing",
        "lede": "The steps that turn powders and foils into a finished cell, in production order.",
        "context": "Place operations and quality checks in process order.",
        "example": "An electrode can meet coating mass targets but fail adhesion or moisture checks later.",
        "lesson_url": "https://lemonergy.com/learn/fundamentals/cell-production/",
        "lesson_label": "Open production"
      }
    },
    {
      "id": "term:calendering",
      "type": "Term",
      "label": "Calendering",
      "properties": {
        "id": "calendering",
        "name": "Calendering",
        "section": "topic-manufacturing",
        "definition": "Compressing a dried electrode coating between rollers to set its thickness, density and porosity. It is one of the electrode-making steps in cell production.",
        "related": [
          "porosity",
          "electrode-density",
          "drying",
          "slitting"
        ],
        "lesson": "fundamentals/cell-production/#electrodes",
        "example": {
          "title": "Connect thickness and density",
          "text": "At fixed mass and area, reducing thickness raises bulk density. The pore structure still needs to support wetting and transport."
        },
        "url": "https://lemonergy.com/learn/glossary/calendering/",
        "mentions": [
          "electrode",
          "cell-production",
          "coating"
        ]
      }
    },
    {
      "id": "term:winding",
      "type": "Term",
      "label": "Winding",
      "properties": {
        "id": "winding",
        "name": "Winding",
        "section": "topic-manufacturing",
        "definition": "Rolling the two electrode strips and two separator strips together around a mandrel into a jelly roll. It is fast and well understood, and it produces the round roll of a cylindrical cell or the flattened roll of many prismatic cells.",
        "related": [
          "jelly-roll",
          "stacking",
          "cylindrical-cell",
          "prismatic-cell"
        ],
        "lesson": "fundamentals/cell-production/#assembly",
        "url": "https://lemonergy.com/learn/glossary/winding/",
        "mentions": [
          "electrode",
          "separator"
        ]
      }
    },
    {
      "id": "term:jelly-roll",
      "type": "Term",
      "label": "Jelly roll",
      "properties": {
        "id": "jelly-roll",
        "name": "Jelly roll",
        "section": "topic-components",
        "definition": "Electrodes and separators wound together into a spiral. It is the inside of a cylindrical cell and of many prismatic cells; large pouch cells usually use stacked sheets instead.",
        "related": [
          "winding",
          "cylindrical-cell",
          "prismatic-cell",
          "stacking"
        ],
        "lesson": "fundamentals/cell-architecture/#whole-cell",
        "example": {
          "title": "Unroll the geometry",
          "text": "A wound assembly contains long electrode and separator strips; the cylindrical exterior does not make its electrodes solid cylinders."
        },
        "url": "https://lemonergy.com/learn/glossary/jelly-roll/",
        "mentions": []
      }
    },
    {
      "id": "term:lithium-plating",
      "type": "Term",
      "label": "Lithium plating",
      "properties": {
        "id": "lithium-plating",
        "name": "Lithium plating",
        "section": "topic-aging",
        "definition": "Lithium metal depositing on the negative-electrode surface instead of intercalating into it. It is promoted by charging at low temperature or high current.",
        "related": [
          "dendrite",
          "fast-charging",
          "intercalation",
          "np-ratio",
          "dead-lithium",
          "electrodeposition"
        ],
        "lesson": "fundamentals/battery-aging/#plating",
        "url": "https://lemonergy.com/learn/glossary/lithium-plating/",
        "mentions": []
      }
    },
    {
      "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: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: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.",
        "related": [
          "electrolyte",
          "ceramic-coated-separator",
          "separator-shutdown",
          "internal-short-circuit",
          "porosity"
        ],
        "lesson": "fundamentals/cell-architecture/#separator",
        "example": {
          "title": "Different conduction paths",
          "text": "A separator prevents direct electronic contact while permitting ionic transport through its electrolyte-filled structure."
        },
        "url": "https://lemonergy.com/learn/glossary/separator/",
        "mentions": []
      }
    }
  ]
}