{
    "title": "Two-dimensional siloxene nanosheets: novel high-performance supercapacitor electrode materials",
    "inventor_name": "Karthikeyan Krishnamoorthy et al.",
    "publication_year": 2018,
    "device_name": "Symmetric supercapacitor (SSC) device",
    "goal": "Develop high-performance supercapacitor electrodes using siloxene nanosheets",
    "problem_addressed": "Need for energy-storage electrodes with higher capacitance, energy density, rate capability and long-term cycling stability",
    "concept_summary": "Siloxene, a two-dimensional silicon-based nanosheet functionalized with O, H and OH groups, is fabricated and used as the electrode material in a symmetric supercapacitor employing 0.5 M tetraethylammonium tetrafluoroborate electrolyte. The material exhibits pseudocapacitive behavior arising from ion intercalation/deintercalation, delivering high specific capacitance, energy and power density, and excellent cycling stability.",
    "detailed_description": null,
    "principles": [
        "Pseudocapacitance",
        "Ion intercalation/deintercalation",
        "Surface redox reactions"
    ],
    "scientific_domains": [
        "Materials Science",
        "Electrochemistry"
    ],
    "mechanisms_of_action": [
        "Charge storage via surface redox (pseudocapacitance)",
        "Ion intercalation into siloxene layers"
    ],
    "materials": [
        "Siloxene (Si6H3(OH)3)n",
        "Tetraethylammonium tetrafluoroborate electrolyte"
    ],
    "energy_sources": [
        "Electrical energy (for charging/discharging)"
    ],
    "inputs": [
        "Siloxene electrode material",
        "Electrolyte solution (0.5 M TEABF4)",
        "Electrical power for charging"
    ],
    "outputs": [
        "Stored electrical energy",
        "Discharge current"
    ],
    "claimed_performance": "Maximum specific capacitance 2.18 mF cm^-^2, energy density 9.82 mJ cm^-^2, power density 272.5 mW cm^-^2, and 98 % capacitance retention after 10 000 charge-discharge cycles.",
    "experimental_evidence": "Cyclic voltammetry showed pseudocapacitive behavior; galvanostatic charge-discharge profiles displayed symmetric triangular curves; cycling test demonstrated 98 % retention after 10 000 cycles.",
    "replication_status": "Results reported in a peer-reviewed journal; no explicit independent replication mentioned.",
    "keywords": [
        "siloxene",
        "supercapacitor",
        "2D material",
        "pseudocapacitance",
        "energy storage"
    ],
    "related_technologies": [
        "Carbon-based supercapacitors",
        "Silicon-based electrode materials"
    ],
    "controversy_level": "low",
    "confidence_score": 0.9,
    "practicability_score": 0.7,
    "fringe_score": 0.2,
    "evidence_strength": 0.8,
    "risk_score": 0.1,
    "trl_estimate": 6,
    "source_urls": [
        "https://pubs.rsc.org/en/content/articlelanding/2018/ee/c8ee00160j#!divAbstract",
        "https://www.cambridge.org/core/journals/journal-of-materials-research/article/local-and-electronic-structure-of-siloxene/F4AB681764E0682EBD74EFF6D7FC9636",
        "http://statistics.roma2.infn.it/~marsili/Grafene/PhysRevB.56.13132.pdf",
        "https://www.worldscientific.com/doi/abs/10.1142/9789812812995_0020",
        "https://europepmc.org/articles/pmc6565710"
    ],
    "organizations": [
        "RexResearch",
        "University of ... (authors' affiliations not specified)"
    ],
    "applications": [
        "Electrochemical energy storage",
        "Portable and grid-scale supercapacitors"
    ],
    "limitations": [
        "Specific capacitance lower than some high-surface-area carbon materials",
        "Requires careful handling of liquid electrolyte"
    ],
    "open_questions": [
        "Scalability and cost of siloxene sheet production",
        "Long-term stability beyond 10 000 cycles",
        "Performance in alternative electrolytes or solid-state configurations"
    ],
    "red_flags": [],
    "evidence_quotes": [
        "Cyclic voltammetric studies of the siloxene SSC device revealed the presence of pseudocapacitance in the siloxene sheets that arose from an intercalation/deintercalation phenomenon.",
        "The galvanostatic charge-discharge profiles of the device displayed sloped symmetric triangular curves with a maximum specific capacitance of 2.18 mF cm^-^2, high energy density of 9.82 mJ cm^-^2, good rate capability, and excellent cycling stability of 98 % capacitance retention after 10 000 cycles.",
        "The siloxene SSC device delivered a maximum power density of 272.5 mW cm^-^2, which is higher than those of other silicon- and carbon-based SSCs."
    ],
    "category": "Nanotechnology"
}