{
  "node": {
    "id": "term:cryo-electron-microscopy",
    "type": "Term",
    "label": "Cryo-electron microscopy",
    "properties": {
      "id": "cryo-electron-microscopy",
      "name": "Cryo-electron microscopy",
      "abbr": "cryo-EM",
      "aka": [
        "cryo-TEM",
        "cryogenic electron microscopy"
      ],
      "section": "topic-analysis",
      "definition": "Electron microscopy of samples kept near liquid-nitrogen temperature, which spares beam-sensitive materials from damage. It produced the first atomic-resolution images of lithium-metal dendrites and their SEI in 2017 and is now a standard tool for lithium-metal anodes and other fragile interphases.",
      "related": [
        "transmission-electron-microscopy",
        "lithium-metal-anode",
        "sei",
        "dendrite",
        "focused-ion-beam-sem"
      ],
      "url": "https://lemonergy.com/learn/glossary/cryo-electron-microscopy/",
      "mentions": []
    }
  },
  "edges": [
    {
      "id": "edge:5536",
      "source": "term:cryo-electron-microscopy",
      "target": "topic:topic-analysis",
      "type": "belongsTo",
      "properties": {
        "sourceFile": "terms.json"
      }
    },
    {
      "id": "edge:5537",
      "source": "term:cryo-electron-microscopy",
      "target": "term:transmission-electron-microscopy",
      "type": "relatedTo",
      "properties": {
        "sourceFile": "terms.json",
        "meaning": "Related context; not a causal claim"
      }
    },
    {
      "id": "edge:5538",
      "source": "term:cryo-electron-microscopy",
      "target": "term:lithium-metal-anode",
      "type": "relatedTo",
      "properties": {
        "sourceFile": "terms.json",
        "meaning": "Related context; not a causal claim"
      }
    },
    {
      "id": "edge:5539",
      "source": "term:cryo-electron-microscopy",
      "target": "term:sei",
      "type": "relatedTo",
      "properties": {
        "sourceFile": "terms.json",
        "meaning": "Related context; not a causal claim"
      }
    },
    {
      "id": "edge:5540",
      "source": "term:cryo-electron-microscopy",
      "target": "term:dendrite",
      "type": "relatedTo",
      "properties": {
        "sourceFile": "terms.json",
        "meaning": "Related context; not a causal claim"
      }
    },
    {
      "id": "edge:5541",
      "source": "term:cryo-electron-microscopy",
      "target": "term:focused-ion-beam-sem",
      "type": "relatedTo",
      "properties": {
        "sourceFile": "terms.json",
        "meaning": "Related context; not a causal claim"
      }
    }
  ],
  "neighbors": [
    {
      "id": "topic:topic-analysis",
      "type": "Topic",
      "label": "Materials analysis and post-mortem",
      "properties": {
        "id": "topic-analysis",
        "name": "Materials analysis and post-mortem",
        "lede": "The laboratory techniques that look inside electrodes, interphases and electrolytes to see what a cell is made of and how it aged.",
        "context": "Connect results with scale and specimen preparation.",
        "example": "Surface and bulk measurements may find different compositions in the same electrode without contradiction.",
        "lesson_url": "https://lemonergy.com/learn/labs/battery-materials-lab/",
        "lesson_label": "Open materials lab"
      }
    },
    {
      "id": "term:transmission-electron-microscopy",
      "type": "Term",
      "label": "Transmission electron microscopy",
      "properties": {
        "id": "transmission-electron-microscopy",
        "name": "Transmission electron microscopy",
        "abbr": "TEM",
        "aka": [
          "STEM",
          "HRTEM"
        ],
        "section": "topic-analysis",
        "definition": "Imaging by passing an electron beam through a specimen thinner than about 100 nm, fine enough to resolve rows of atoms. It reveals the nanometre-thick rock-salt layer that forms on aged nickel-rich particles, the structure of SEI and CEI, and cracks within particles; specimens are usually thinned with a focused ion beam.",
        "related": [
          "scanning-electron-microscopy",
          "cryo-electron-microscopy",
          "focused-ion-beam-sem",
          "structural-degradation",
          "cei"
        ],
        "url": "https://lemonergy.com/learn/glossary/transmission-electron-microscopy/",
        "mentions": [
          "sei"
        ]
      }
    },
    {
      "id": "term:lithium-metal-anode",
      "type": "Term",
      "label": "Lithium metal anode",
      "properties": {
        "id": "lithium-metal-anode",
        "name": "Lithium metal anode",
        "section": "topic-components",
        "definition": "A negative electrode made of lithium metal itself. It stores about ten times more charge per gram than graphite, which is the main attraction of solid-state cells, but it is reactive and prone to uneven deposits.",
        "related": [
          "lithium-metal-battery",
          "dendrite",
          "solid-state-battery",
          "anode-free"
        ],
        "lesson": "fundamentals/solid-state-cell-production/#why",
        "url": "https://lemonergy.com/learn/glossary/lithium-metal-anode/",
        "mentions": [
          "electrode",
          "negative-electrode",
          "graphite"
        ]
      }
    },
    {
      "id": "term:sei",
      "type": "Term",
      "label": "Solid–electrolyte interphase",
      "properties": {
        "id": "sei",
        "name": "Solid–electrolyte interphase",
        "abbr": "SEI",
        "section": "topic-aging",
        "definition": "A film of electrolyte reaction products on the negative-electrode particles — graphite, and also silicon or lithium metal. It protects the electrode from further reaction but grows slowly for the whole life of the cell, consuming cyclable lithium.",
        "related": [
          "passivation",
          "formation",
          "calendar-aging",
          "loss-of-lithium-inventory",
          "cei"
        ],
        "lesson": "fundamentals/battery-aging/#sei",
        "url": "https://lemonergy.com/learn/glossary/sei/",
        "mentions": [
          "electrode",
          "graphite",
          "electrolyte"
        ]
      }
    },
    {
      "id": "term:dendrite",
      "type": "Term",
      "label": "Dendrite",
      "properties": {
        "id": "dendrite",
        "name": "Dendrite",
        "section": "topic-aging",
        "definition": "A tree-like metal deposit that can grow from the negative electrode through the separator, raising self-discharge or causing an internal short circuit.",
        "related": [
          "lithium-plating",
          "internal-short-circuit",
          "lithium-metal-anode",
          "separator"
        ],
        "lesson": "fundamentals/battery-aging/#plating",
        "url": "https://lemonergy.com/learn/glossary/dendrite/",
        "mentions": [
          "electrode",
          "negative-electrode",
          "self-discharge",
          "short-circuit"
        ]
      }
    },
    {
      "id": "term:focused-ion-beam-sem",
      "type": "Term",
      "label": "Focused ion beam SEM",
      "properties": {
        "id": "focused-ion-beam-sem",
        "name": "Focused ion beam SEM",
        "abbr": "FIB-SEM",
        "aka": [
          "focused ion beam",
          "FIB",
          "plasma FIB",
          "serial sectioning"
        ],
        "section": "topic-analysis",
        "definition": "A scanning electron microscope paired with an ion beam that mills material away at a chosen spot. It cuts clean cross-sections through particles and coatings, lifts out thin slices for TEM, and by alternately milling and imaging rebuilds an electrode’s microstructure in 3D for porosity and tortuosity.",
        "related": [
          "scanning-electron-microscopy",
          "transmission-electron-microscopy",
          "porosity",
          "tortuosity",
          "x-ray-computed-tomography"
        ],
        "url": "https://lemonergy.com/learn/glossary/focused-ion-beam-sem/",
        "mentions": [
          "electrode"
        ]
      }
    }
  ]
}