{
  "abstract": "Developing affordable and stable electrode materials is crucial for advancing sustainable supercapacitor technologies. In this study, a lead-free Co(II)-halide hybrid material (CoTEA) was synthesized via slow evaporation and evaluated as an electrode for aqueous electrochemical energy storage. Single-crystal X-ray diffraction showed a zero-dimensional structure consisting of isolated tetrahedral units separated by tetraethylammonium cations. Morphological and spectroscopic analyses confirmed the crystalline nature and the Co(II) oxidation state of the material. Optical measurements indicated semiconducting behavior with a band gap of 3.64 eV. The electrochemical response of CoTEA was highly dependent on the electrolyte used. At 5 mV s-1, specific capacitances of 5.01, 22.24, and 21.37 F g-1 were recorded in 1 M H2SO4, 0.5 M Na2SO4, and 6 M KOH, respectively. While Na2SO4 yielded the highest capacitance at the lowest scan rate, KOH demonstrated better rate performance and lower charge-transfer resistance, suggesting more efficient interfacial kinetics. In 6 M KOH, CoTEA achieved a GCD-specific capacitance of 21.41 F g-1 at 0.5 A g-1 and maintained about 85% of its initial capacitance after 3000 cycles. These results underscore the significant impact of electrolyte composition on the charge-storage behavior of CoTEA and present it as a promising, tunable material for aqueous supercapacitor applications.strong influence of electrolyte composition on the charge-storage behavior of CoTEA and highlight it as a promising tunable material for aqueous supercapacitor applications.",
  "abstract_shown": true,
  "affiliations": [
    "Faculty of Sciences of Sfax",
    "University of Sfax",
    "Department of Chemical Engineering, Engineering Faculty",
    "Sivas Cumhuriyet University",
    "Department of Inorganic Chemistry, Faculty of Chemical Technology",
    "University of Chemistry and Technology Prague",
    "Bordeaux INP, ICMCB, UMR 5026, Pessac, France, F-33600"
  ],
  "article_type": null,
  "arxiv": null,
  "author_total": 8,
  "authors": [
    {
      "affs": [
        0,
        1
      ],
      "name": "Dhouha Abid",
      "orcid": "0000-0002-5967-5876"
    },
    {
      "affs": [
        0,
        1
      ],
      "name": "Emna Ben Messaoud"
    },
    {
      "affs": [
        2,
        3
      ],
      "name": "Ayten Ateş"
    },
    {
      "affs": [
        4,
        5
      ],
      "name": "Sana Akir"
    },
    {
      "affs": [
        6
      ],
      "name": "Philippe Guionneau"
    },
    {
      "affs": [
        6
      ],
      "name": "Stanislav Pechev"
    },
    {
      "affs": [
        6
      ],
      "name": "Nathalie Daro"
    },
    {
      "affs": [
        0,
        1
      ],
      "name": "Zakaria Elaoud"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/1ascy89ctj929.bib",
  "cited_by": 0,
  "doi": "10.26434/chemrxiv.15008470/v1",
  "fulltext_url": null,
  "id": "1ascy89ctj929",
  "issns": [],
  "landing_url": "https://chemrxiv.org/doi/full/10.26434/chemrxiv.15008470/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",
      "2504|Supercapacitor Materials and Fabrication"
    ]
  ],
  "openalex": "W7211959192",
  "pdf_url": "https://chemrxiv.org/doi/pdf/10.26434/chemrxiv.15008470/v1",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-08",
  "publisher": "American Chemical Society (ACS)",
  "ris": "https://research.draconitic.com/paper/1ascy89ctj929.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:17:17Z",
      "native_id": "10.26434/chemrxiv.15008470",
      "source": "chemrxiv",
      "url": "https://chemrxiv.org/doi/full/10.26434/chemrxiv.15008470/v1"
    }
  ],
  "subjects": [
    {
      "field": "chemistry",
      "origin": "openalex:2504|Supercapacitor Materials and Fabrication",
      "subfield": "materials-polymers"
    }
  ],
  "title": "Electrolyte-Dependent Electrochemical Performance of a Lead-Free Semiconducting Co(II)-Halide Hybrid for Aqueous Supercapacitors",
  "title_text": "Electrolyte-Dependent Electrochemical Performance of a Lead-Free Semiconducting Co(II)-Halide Hybrid for Aqueous Supercapacitors",
  "type": "preprint",
  "updated_at": "2026-10-30T12:17:17Z",
  "url": "https://research.draconitic.com/paper/1ascy89ctj929",
  "venue": "ChemRxiv",
  "versions": []
}