{
    "title": "Glass Battery",
    "inventor_name": "John Goodenough",
    "publication_year": 2017,
    "device_name": "All-Solid-State Glass Battery",
    "goal": "Provide a fast-charging, non-combustible, high-energy-density rechargeable battery.",
    "problem_addressed": "Safety hazards (flammable liquid electrolytes), low energy density, slow charge rates, dendrite formation limiting cycle life in conventional lithium-ion batteries.",
    "concept_summary": "The invention replaces liquid electrolytes with a glass-based solid electrolyte that conducts alkali-metal ions (Li^+, Na^+, K^+) while being an electronic insulator. The glass electrolyte enables dendrite-free plating/stripping of alkali-metal anodes, high dielectric constant for enhanced charge storage, and operation over a wide temperature range, resulting in a safer, faster-charging battery with higher volumetric energy density.",
    "detailed_description": "Goodenough and colleagues developed a dried, water-solvated glass/amorphous solid electrolyte that conducts Li^+ or Na^+ with ionic conductivity >10^-^2 S cm^-^1 at 25  deg C and a large dielectric constant. The electrolyte is wet by metallic alkali-metal anodes, allowing plating and stripping without dendrite formation. Battery cells built with this glass electrolyte demonstrated >1 200 charge-discharge cycles, three-fold higher energy density than commercial Li-ion cells, and reliable operation from -20  deg C to 60  deg C. The material can be processed as a paste, dry-pressed into thin films, and used as both electrolyte and separator in rechargeable batteries, fuel cells, electrolyzers, and electric-double-layer capacitors.",
    "principles": [
        "Solid-state ion conduction",
        "High dielectric constant for electric-double-layer capacitance",
        "Alkali-metal plating/stripping without dendrites",
        "Temperature-stable ionic conductivity"
    ],
    "scientific_domains": [
        "Electrochemistry",
        "Materials Science",
        "Solid-State Physics"
    ],
    "mechanisms_of_action": [
        "Ion transport through glass electrolyte",
        "Metal plating/stripping at electrodes",
        "Suppression of dendrite growth via electronic insulation",
        "Enhanced capacitance via large dielectric constant"
    ],
    "materials": [
        "Lithium-glass electrolyte (Li-glass)",
        "Sodium-glass electrolyte (Na-glass)",
        "Water-solvated glass/amorphous solid",
        "BaKPO_4 (proton conductor)",
        "Precursors: LiOH, LiCl, NaCl, Ba(OH)_2, Sr(OH)_2, BaO, SrO, CaO, MgO, Al_2O_3, B_2O_3, SiO_2"
    ],
    "energy_sources": [
        "Alkali-metal (Li, Na, K) anode"
    ],
    "inputs": [
        "Electrical charging current",
        "Lithium or sodium ions",
        "Water (for solvation during synthesis)",
        "Heat (for drying and film formation)"
    ],
    "outputs": [
        "Electrical energy",
        "Heat (during charge/discharge)",
        "Hydrogen gas (in electrolysis mode, optional)"
    ],
    "claimed_performance": ">=3x energy density of current Li-ion batteries; >1 200 charge-discharge cycles; fast charge in minutes; operation from -20  deg C to 60  deg C; high volumetric energy density.",
    "experimental_evidence": "Lab tests showed ionic conductivity >10^-^2 S cm^-^1, >1 200 cycles with low resistance, and energy density three times that of commercial Li-ion cells. Figures in the patent demonstrate Arrhenius plots, dielectric constant measurements, and charge-discharge curves for Li-glass and Na-glass cells.",
    "replication_status": "Demonstrated in laboratory prototypes; no commercial scale-up reported.",
    "keywords": [
        "glass electrolyte",
        "all-solid-state battery",
        "non-combustible",
        "fast charging",
        "alkali-metal",
        "dendrite suppression",
        "high dielectric constant"
    ],
    "related_technologies": [
        "Lithium-ion battery",
        "Solid-state battery",
        "Electric-double-layer capacitor"
    ],
    "controversy_level": "low",
    "confidence_score": 0.9,
    "practicability_score": 0.7,
    "fringe_score": 0.2,
    "evidence_strength": 0.7,
    "risk_score": 0.2,
    "trl_estimate": 5,
    "source_urls": [
        "https://news.utexas.edu/2017/02/28/goodenough-introduces-new-battery-technology",
        "http://pubs.rsc.org/en/content/articlelanding/2016/ee/c5ee02924d#!divAbstract"
    ],
    "organizations": [
        "University of Texas at Austin",
        "UT Austin Office of Technology Commercialization"
    ],
    "applications": [
        "Electric vehicles",
        "Portable electronics",
        "Stationary energy storage"
    ],
    "limitations": [
        "Scalable manufacturing of glass electrolyte",
        "Long-term stability beyond 1 200 cycles",
        "Cost of precursor materials and drying process",
        "Integration with existing cathode technologies"
    ],
    "open_questions": [
        "How does the glass electrolyte perform at high current densities?",
        "What is the degradation mechanism over >10 000 cycles?",
        "Can the technology be adapted to high-voltage cathodes?",
        "What are the environmental impacts of large-scale glass electrolyte production?"
    ],
    "red_flags": [],
    "evidence_quotes": [
        "The researchers demonstrated that their new battery cells have at least three times as much energy density as today's lithium-ion batteries.",
        "In experiments, the researchers' cells have demonstrated more than 1 200 cycles with low cell resistance.",
        "The solid-glass electrolytes can operate, or have high conductivity, at -20  deg C and up to 60  deg C.",
        "The glass electrolytes allow plating and stripping of alkali metals on both the cathode and the anode side without dendrites.",
        "A dried, water-solvated glass/amorphous solid electrolyte conducts Li^+ or Na^+ nearly as rapidly as a flammable organic liquid at room temperature."
    ],
    "category": "Materials Science & Ceramics"
}