{
  "node": {
    "id": "term:secondary-cell",
    "type": "Term",
    "label": "Secondary cell",
    "properties": {
      "id": "secondary-cell",
      "name": "Secondary cell",
      "aka": [
        "rechargeable battery"
      ],
      "section": "topic-other-chemistries",
      "definition": "A cell whose reaction runs in both directions, so it can be recharged by driving current back into it. Lithium-ion, lead–acid and nickel–metal hydride are all secondary chemistries.",
      "related": [
        "primary-cell",
        "cycle",
        "lithium-ion"
      ],
      "url": "https://lemonergy.com/learn/glossary/secondary-cell/",
      "mentions": []
    }
  },
  "edges": [
    {
      "id": "edge:811",
      "source": "term:secondary-cell",
      "target": "topic:topic-other-chemistries",
      "type": "belongsTo",
      "properties": {
        "sourceFile": "terms.json"
      }
    },
    {
      "id": "edge:812",
      "source": "term:secondary-cell",
      "target": "term:primary-cell",
      "type": "relatedTo",
      "properties": {
        "sourceFile": "terms.json",
        "meaning": "Related context; not a causal claim"
      }
    },
    {
      "id": "edge:813",
      "source": "term:secondary-cell",
      "target": "term:cycle",
      "type": "relatedTo",
      "properties": {
        "sourceFile": "terms.json",
        "meaning": "Related context; not a causal claim"
      }
    },
    {
      "id": "edge:814",
      "source": "term:secondary-cell",
      "target": "term:lithium-ion",
      "type": "relatedTo",
      "properties": {
        "sourceFile": "terms.json",
        "meaning": "Related context; not a causal claim"
      }
    }
  ],
  "neighbors": [
    {
      "id": "topic:topic-other-chemistries",
      "type": "Topic",
      "label": "Other and emerging chemistries",
      "properties": {
        "id": "topic-other-chemistries",
        "name": "Other and emerging chemistries",
        "lede": "Batteries beyond today’s lithium-ion: lead, nickel and primary cells, flow and metal–air batteries, solid-state and lithium-metal cells, and the multivalent and sodium chemistries in development.",
        "context": "Do not carry lithium-ion assumptions into every chemistry.",
        "example": "Two chemistries can meet the same energy target with different voltage windows and charge termination.",
        "lesson_url": "https://lemonergy.com/learn/fundamentals/cell-anatomy/",
        "lesson_label": "Open cell anatomy"
      }
    },
    {
      "id": "term:primary-cell",
      "type": "Term",
      "label": "Primary cell",
      "properties": {
        "id": "primary-cell",
        "name": "Primary cell",
        "aka": [
          "non-rechargeable battery"
        ],
        "section": "topic-other-chemistries",
        "definition": "A cell designed to be discharged once and not recharged, such as an alkaline or lithium–manganese dioxide cell. Its reaction is not reversible in practice, unlike the secondary cells this glossary is mostly about.",
        "related": [
          "secondary-cell",
          "lithium-ion",
          "iec-60086-5",
          "lithium-iron-disulfide"
        ],
        "url": "https://lemonergy.com/learn/glossary/primary-cell/",
        "mentions": [
          "lithium-manganese-dioxide",
          "manganese"
        ]
      }
    },
    {
      "id": "term:cycle",
      "type": "Term",
      "label": "Cycle",
      "properties": {
        "id": "cycle",
        "name": "Cycle",
        "section": "topic-charging",
        "definition": "One discharge and one charge, in either order. A full cycle spans the whole usable capacity; a partial cycle covers only part of it, and aging tests usually report both the cycle count and the depth of discharge.",
        "related": [
          "cycle-life",
          "depth-of-discharge",
          "equivalent-full-cycle",
          "cycle-aging"
        ],
        "url": "https://lemonergy.com/learn/glossary/cycle/",
        "mentions": [
          "usable-capacity"
        ]
      }
    },
    {
      "id": "term:lithium-ion",
      "type": "Term",
      "label": "Lithium-ion battery",
      "properties": {
        "id": "lithium-ion",
        "name": "Lithium-ion battery",
        "abbr": "Li-ion",
        "section": "topic-chemistries",
        "definition": "A rechargeable cell in which lithium ions shuttle between two intercalation electrodes, typically graphite and a lithium metal oxide, through a non-aqueous electrolyte. Commercialised in 1991, it dominates portable electronics, electric vehicles and new grid storage.",
        "related": [
          "intercalation",
          "graphite",
          "nmc",
          "lfp",
          "rocking-chair",
          "lithium"
        ],
        "lesson": "fundamentals/battery-basics/#how-it-works",
        "url": "https://lemonergy.com/learn/glossary/lithium-ion/",
        "mentions": [
          "electrolyte"
        ]
      }
    }
  ]
}