{
  "abstract": "High-voltage lithium cobalt oxide (LiCoO 2 ) phone cells age faster in heat, yet public data on their life in hot climates are scarce. This study estimates how much a published electrolyte additive package (nitrile, LiDFOB or LiPO 2 F 2 , TMSPi,low FEC) and further cathode stabilisation (trace Ti–Mg–Al doping, surface coating, single-crystalparticles) could extend the life of an iPhone 17-type cell (3,692 mAh, 4.50 V, rated ≥1,000 cycles to 80%). A Monte Carlo life model (40,000 draws) was calibrated to public measurements: 165 owner battery-health readings, CALCE LiCoO 2 cycling and storage data, and Sandia cycling data at 25 and 35 °C, and was constrained by the EU EPREL rating. Median cycles to 80% were 910 (80% range 733–1,052) for the baseline and 1,239 (915–1,785) for the proposed chemistry at 25 °C, and 674 (533–818) versus 926 (673–1,340) under a defined hot-climate (Indian summer) usage profile. The life ratio was about 1.38x (1.10–1.93), with probabilities of 67%, 36% and 8% of exceeding 1.25x, 1.5x and 2x. A backtest on 20 held-out cells gave a median error of 21%, and the stated ranges are too narrow. The dominant uncertainty is the incremental benefit over additives already present in commercial electrolytes. Measured CALCE data also show severe loss for LiCoO 2 stored fully charged at 50 °C (about 49% in 166 days). A paired electrolyte test is proposed to resolve the main uncertainty.",
  "abstract_shown": true,
  "affiliations": [
    "Independent Researcher"
  ],
  "article_type": null,
  "arxiv": null,
  "author_total": 1,
  "authors": [
    {
      "affs": [
        0
      ],
      "name": "Anil Chundu",
      "orcid": "0009-0008-2890-9976"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/3yc60xhr4btdx.bib",
  "cited_by": 0,
  "doi": "10.26434/chemrxiv.15010912/v1",
  "fulltext_url": null,
  "id": "3yc60xhr4btdx",
  "issns": [],
  "landing_url": "https://chemrxiv.org/doi/full/10.26434/chemrxiv.15010912/v1",
  "language": null,
  "licence": "CC-BY",
  "licence_label": "CC BY",
  "licence_source": "journal",
  "licence_url": "https://creativecommons.org/licenses/by/4.0/",
  "metadata_licence": null,
  "native_subjects": [
    [
      "openalex",
      "2203|Advanced Battery Technologies Research"
    ]
  ],
  "openalex": "W7223392275",
  "pdf_url": "https://chemrxiv.org/doi/pdf/10.26434/chemrxiv.15010912/v1",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-22",
  "publisher": "American Chemical Society (ACS)",
  "ris": "https://research.draconitic.com/paper/3yc60xhr4btdx.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:17:26Z",
      "native_id": "10.26434/chemrxiv.15010912",
      "source": "chemrxiv",
      "url": "https://chemrxiv.org/doi/full/10.26434/chemrxiv.15010912/v1"
    }
  ],
  "subjects": [
    {
      "field": "chemistry",
      "origin": "source:chemrxiv",
      "subfield": "general"
    }
  ],
  "title": "Extending the Life of High-Voltage LiCoO2 Phone Cells in Hot Climates: An Evidence-Calibrated Assessment of Electrolyte and Cathode Improvements",
  "title_text": "Extending the Life of High-Voltage LiCoO2 Phone Cells in Hot Climates: An Evidence-Calibrated Assessment of Electrolyte and Cathode Improvements",
  "type": "preprint",
  "updated_at": "2026-10-30T12:17:26Z",
  "url": "https://research.draconitic.com/paper/3yc60xhr4btdx",
  "venue": "ChemRxiv",
  "versions": []
}