{"id":"ST-05","title":"Sodium Battery Technology: Periodic Table Electrochemistry, Hard Carbon Intercalation \u0026 Grid Blackout Resilience","route":"Science-and-Engineering/Chemistry/Electrochemistry/index.html","tabRoute":"Science-and-Engineering/Chemistry/Electrochemistry/Sodium-Battery-Technology/index.html","paperRoute":"Science-and-Engineering/Chemistry/Electrochemistry/Paper/index.html","date":"2026-10-25","model":"Gemini 4 Argon (gemini-4-argon · High Thinking + Google Search + Pandas)","summary":{"crustalAbundanceRatio":"1,180×","naPpm":23600,"liPpm":20,"ionicRadiusNa":1.02,"ionicRadiusLi":0.76,"ionicVolumeRatio":2.42,"sibCellCostUsdKwh":"41–49 $/kWh","lfpCellCostUsdKwh":"68 $/kWh","minus20CRetentionSibPct":92,"minus20CRetentionLfpPct":64,"maxCycleLife":"10,000 cycles"},"chemistries":[{"id":"SIB-PBW","chemistry":"Na-Ion Prussian White (CATL Gen-2 / Natron)","ion":"Na+ (r = 1.02 Å)","cathode":"Na2Fe[Fe(CN)6] (Prussian White)","anode":"Hard Carbon (Al foil)","gravWhKg":165,"volWhL":340,"cellCostUsdKwh":44,"cycleLife":8000,"tempRetMinus20Pct":92,"crustalPpm":23600,"zeroVoltSafe":"Yes (Al collector both sides)"},{"id":"SIB-NFM","chemistry":"Na-Ion Layered Oxide (HiNa NaNi1/3Fe1/3Mn1/3O2)","ion":"Na+ (r = 1.02 Å)","cathode":"O3/P2 Layered Transition Metal Oxide","anode":"Hard Carbon (Al foil)","gravWhKg":155,"volWhL":330,"cellCostUsdKwh":49,"cycleLife":4500,"tempRetMinus20Pct":88,"crustalPpm":23600,"zeroVoltSafe":"Yes (0 V short-circuit transport)"},{"id":"SIB-POLY","chemistry":"Na-Ion Polyanionic NFPP (Na4Fe3(PO4)2P2O7 Grid)","ion":"Na+ (r = 1.02 Å)","cathode":"Polyanionic Iron Pyrophosphate","anode":"Hard Carbon (Al foil)","gravWhKg":135,"volWhL":295,"cellCostUsdKwh":41,"cycleLife":10000,"tempRetMinus20Pct":90,"crustalPpm":23600,"zeroVoltSafe":"Yes (ultra-stable 3D framework)"},{"id":"LIB-LFP","chemistry":"Li-Ion LFP (LiFePO4 Prismatic BESS Benchmark)","ion":"Li+ (r = 0.76 Å)","cathode":"Olivine LiFePO4","anode":"Graphite (Cu foil required)","gravWhKg":190,"volWhL":410,"cellCostUsdKwh":68,"cycleLife":6500,"tempRetMinus20Pct":64,"crustalPpm":20,"zeroVoltSafe":"No (Cu dissolution \u003c 1.5 V)"},{"id":"LIB-LMFP","chemistry":"Li-Ion LMFP (Manganese-Doped LiMn0.6Fe0.4PO4)","ion":"Li+ (r = 0.76 Å)","cathode":"Olivine LMFP (4.0 V plateau)","anode":"Graphite / SiOx (Cu foil)","gravWhKg":225,"volWhL":490,"cellCostUsdKwh":74,"cycleLife":4500,"tempRetMinus20Pct":68,"crustalPpm":20,"zeroVoltSafe":"No (Cu collector corrosion)"},{"id":"LIB-NMC811","chemistry":"Li-Ion NMC-811 (High-Nickel Long-Range EV)","ion":"Li+ (r = 0.76 Å)","cathode":"LiNi0.8Mn0.1Co0.1O2","anode":"Graphite + Si (Cu foil)","gravWhKg":275,"volWhL":670,"cellCostUsdKwh":98,"cycleLife":2200,"tempRetMinus20Pct":72,"crustalPpm":20,"zeroVoltSafe":"No (thermal runaway O2 release)"}],"tempCurve":[{"tempC":-40,"sibRetentionPct":76.0,"lfpRetentionPct":28.0,"nmcRetentionPct":41.0},{"tempC":-30,"sibRetentionPct":85.0,"lfpRetentionPct":45.0,"nmcRetentionPct":56.0},{"tempC":-20,"sibRetentionPct":92.0,"lfpRetentionPct":64.0,"nmcRetentionPct":72.0},{"tempC":-10,"sibRetentionPct":96.0,"lfpRetentionPct":79.0,"nmcRetentionPct":85.0},{"tempC":0,"sibRetentionPct":98.5,"lfpRetentionPct":91.0,"nmcRetentionPct":94.0},{"tempC":25,"sibRetentionPct":100.0,"lfpRetentionPct":100.0,"nmcRetentionPct":100.0},{"tempC":45,"sibRetentionPct":99.0,"lfpRetentionPct":98.0,"nmcRetentionPct":95.0}],"pandasScript":"\"\"\"Reproducible Pandas analysis for ST-05: Sodium Battery Technology vs. Lithium-Ion.\"\"\"\nimport numpy as np\nimport pandas as pd\n\n# 1. Periodic Table \u0026 Faraday Law Fundamental Ratios\nF = 96485.3321  # C/mol\nM_Li, M_Na = 6.94, 22.99  # g/mol\nr_Li, r_Na = 0.76, 1.02   # Shannon 6-coord octahedral ionic radius (Angstroms)\nE0_Li, E0_Na = -3.04, -2.71  # V vs SHE\n\nq_Li = F / (3.6 * M_Li)  # 3861 mAh/g\nq_Na = F / (3.6 * M_Na)  # 1166 mAh/g\nvol_ratio = (r_Na / r_Li) ** 3\n\nprint(f\"Theoretical metal specific capacity: Li = {q_Li:.0f} mAh/g vs. Na = {q_Na:.0f} mAh/g\")\nprint(f\"Shannon ionic volume expansion (Na+/Li+)^3: {vol_ratio:.2f}x | Potential shift: +{E0_Na - E0_Li:.2f} V\")\n\n# 2. Load 6-chemistry benchmark table \u0026 compute Levelized Cost of Storage (LCOS $/MWh-cycle)\ndf = pd.read_csv(\"studies-sodium-chemistries.csv\")\ndf[\"cost_per_1000_cycles_usd_kwh\"] = (df[\"cellCostUsdKwh\"] / (df[\"cycleLife\"] / 1000.0)).round(2)\ndf[\"winter_effective_wh_kg_minus20C\"] = (df[\"gravWhKg\"] * df[\"tempRetMinus20Pct\"] / 100.0).round(1)\n\nprint(\"\\n=== Sodium-Ion vs. Lithium-Ion Chemistry Matrix (Pandas) ===\")\nprint(df[[\"id\", \"gravWhKg\", \"cellCostUsdKwh\", \"cycleLife\", \"tempRetMinus20Pct\", \"cost_per_1000_cycles_usd_kwh\", \"winter_effective_wh_kg_minus20C\"]])\n"}