{
  "node": {
    "id": "term:doctor-blade-coating",
    "type": "Term",
    "label": "Doctor-blade coating",
    "properties": {
      "id": "doctor-blade-coating",
      "name": "Doctor-blade coating",
      "aka": [
        "doctor blade",
        "knife coating",
        "blade coating",
        "tape casting"
      ],
      "section": "topic-manufacturing",
      "definition": "Spreading slurry by drawing it under a fixed blade, so the gap between blade edge and foil sets the wet thickness. Simple and cheap, it is the standard way to coat electrode sheets in the laboratory; production lines meter the slurry through a slot die instead, for tighter thickness control at speed.",
      "related": [
        "coating",
        "slot-die",
        "comma-coater",
        "slurry",
        "areal-loading"
      ],
      "url": "https://lemonergy.com/learn/glossary/doctor-blade-coating/",
      "mentions": [
        "electrode"
      ]
    }
  },
  "edges": [
    {
      "id": "edge:4818",
      "source": "term:doctor-blade-coating",
      "target": "topic:topic-manufacturing",
      "type": "belongsTo",
      "properties": {
        "sourceFile": "terms.json"
      }
    },
    {
      "id": "edge:4819",
      "source": "term:doctor-blade-coating",
      "target": "term:coating",
      "type": "relatedTo",
      "properties": {
        "sourceFile": "terms.json",
        "meaning": "Related context; not a causal claim"
      }
    },
    {
      "id": "edge:4820",
      "source": "term:doctor-blade-coating",
      "target": "term:slot-die",
      "type": "relatedTo",
      "properties": {
        "sourceFile": "terms.json",
        "meaning": "Related context; not a causal claim"
      }
    },
    {
      "id": "edge:4821",
      "source": "term:doctor-blade-coating",
      "target": "term:comma-coater",
      "type": "relatedTo",
      "properties": {
        "sourceFile": "terms.json",
        "meaning": "Related context; not a causal claim"
      }
    },
    {
      "id": "edge:4822",
      "source": "term:doctor-blade-coating",
      "target": "term:slurry",
      "type": "relatedTo",
      "properties": {
        "sourceFile": "terms.json",
        "meaning": "Related context; not a causal claim"
      }
    },
    {
      "id": "edge:4823",
      "source": "term:doctor-blade-coating",
      "target": "term:areal-loading",
      "type": "relatedTo",
      "properties": {
        "sourceFile": "terms.json",
        "meaning": "Related context; not a causal claim"
      }
    },
    {
      "id": "edge:mentions/doctor-blade-coating/electrode",
      "source": "term:doctor-blade-coating",
      "target": "term:electrode",
      "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: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:slot-die",
      "type": "Term",
      "label": "Slot die",
      "properties": {
        "id": "slot-die",
        "name": "Slot die",
        "section": "topic-manufacturing",
        "definition": "A precision coating head that extrudes slurry through a narrow slot onto the foil. It sets the coating width and thickness by pump rate and line speed, and can coat in intermittent patches to leave bare foil for tabs.",
        "related": [
          "coating",
          "areal-loading"
        ],
        "url": "https://lemonergy.com/learn/glossary/slot-die/",
        "mentions": [
          "slurry"
        ]
      }
    },
    {
      "id": "term:comma-coater",
      "type": "Term",
      "label": "Comma coater",
      "properties": {
        "id": "comma-coater",
        "name": "Comma coater",
        "aka": [
          "comma bar coater",
          "knife-over-roll coater"
        ],
        "section": "topic-manufacturing",
        "definition": "A knife-over-roll coater whose blade is a roll ground to a comma-shaped edge, set at a precise gap above a backing roll that carries the foil. It tolerates a wide range of slurry viscosity and is common on test and pilot lines, while high-volume electrode lines mostly use slot dies for faster, more uniform coating.",
        "related": [
          "coating",
          "doctor-blade-coating",
          "slot-die",
          "slurry-rheology"
        ],
        "url": "https://lemonergy.com/learn/glossary/comma-coater/",
        "mentions": [
          "electrode",
          "slurry"
        ]
      }
    },
    {
      "id": "term:slurry",
      "type": "Term",
      "label": "Slurry",
      "properties": {
        "id": "slurry",
        "name": "Slurry",
        "section": "topic-manufacturing",
        "definition": "The mixture of active material, conductive carbon, binder and solvent that is coated onto a current-collector foil to make an electrode. Positive slurries use NMP as solvent; graphite slurries are water-based.",
        "related": [
          "mixing",
          "coating",
          "nmp",
          "binder",
          "solids-content"
        ],
        "lesson": "fundamentals/cell-production/#electrodes",
        "url": "https://lemonergy.com/learn/glossary/slurry/",
        "mentions": [
          "electrode",
          "active-material",
          "graphite",
          "conductive-additive"
        ]
      }
    },
    {
      "id": "term:areal-loading",
      "type": "Term",
      "label": "Areal loading",
      "properties": {
        "id": "areal-loading",
        "name": "Areal loading",
        "aka": [
          "mass loading",
          "areal capacity"
        ],
        "section": "topic-components",
        "definition": "How much active material, or capacity, an electrode carries per square centimetre of foil, typically 2–5 mAh/cm². Higher loading raises energy density but lengthens the ion path, which limits fast charging.",
        "unit": "mAh/cm², mg/cm²",
        "related": [
          "coating",
          "energy-density",
          "fast-charging",
          "tortuosity"
        ],
        "example": {
          "title": "Convert mass and area",
          "text": "200 mg active material over 20 cm² gives 10 mg/cm² loading. State whether the measurement includes one or both coated sides."
        },
        "url": "https://lemonergy.com/learn/glossary/areal-loading/",
        "mentions": [
          "milliampere-hour",
          "electrode",
          "active-material"
        ]
      }
    },
    {
      "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"
        ]
      }
    }
  ]
}