{
  "node": {
    "id": "term:pitt",
    "type": "Term",
    "label": "Potentiostatic intermittent titration technique",
    "properties": {
      "id": "pitt",
      "name": "Potentiostatic intermittent titration technique",
      "abbr": "PITT",
      "section": "topic-testing",
      "definition": "The voltage-step counterpart of GITT: the potential is stepped and the decaying current recorded, giving the diffusion coefficient from the current transient. It needs a potentiostat rather than a cycler.",
      "related": [
        "gitt",
        "diffusion-coefficient",
        "potentiostat"
      ],
      "url": "https://lemonergy.com/learn/glossary/pitt/",
      "mentions": [
        "diffusion"
      ]
    }
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      "label": "Testing methods",
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        "name": "Testing methods",
        "lede": "The measurements and test procedures that characterise a cell or pack, from capacity and pulse tests to abuse and environmental tests.",
        "context": "Record specimen, state, instrument, temperature and timing.",
        "example": "Resistance immediately after a current step can differ from a ten-second value because slower polarization contributes.",
        "lesson_url": "https://lemonergy.com/learn/fundamentals/capacity-and-c-rate/",
        "lesson_label": "Open capacity measurements"
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      "id": "term:gitt",
      "type": "Term",
      "label": "Galvanostatic intermittent titration technique",
      "properties": {
        "id": "gitt",
        "name": "Galvanostatic intermittent titration technique",
        "abbr": "GITT",
        "section": "topic-testing",
        "definition": "A series of short constant-current pulses each followed by a long rest, so that both the equilibrium voltage curve and the solid diffusion coefficient can be extracted at each state of charge. It is slow, often days per cell, and a staple of parameterisation.",
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          "diffusion-coefficient",
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      "label": "Diffusion coefficient",
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        "name": "Diffusion coefficient",
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        "section": "topic-transport",
        "definition": "The proportionality constant D in Fick’s first law, in m²/s. It sets how fast a species spreads for a given concentration gradient.",
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          "solid-state-diffusion",
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        "mentions": [
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      "id": "term:potentiostat",
      "type": "Term",
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        "section": "topic-testing",
        "definition": "An instrument that controls the potential of an electrode against a reference and measures the current, or the reverse as a galvanostat. It is the tool for electrochemical impedance spectroscopy and three-electrode experiments.",
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          "electrochemical-impedance-spectroscopy",
          "three-electrode-cell",
          "reference-electrode",
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      "label": "Diffusion",
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        "name": "Diffusion",
        "section": "topic-transport",
        "definition": "The net movement of a species from where it is concentrated to where it is scarce, driven by random thermal motion. In a cell lithium diffuses through the electrolyte in the pores and, far more slowly, through the solid particles themselves.",
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        "url": "https://lemonergy.com/learn/glossary/diffusion/",
        "mentions": [
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}