Sodium-Based Battery Development DOE

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Sodium-Based Battery Development DOE ( sodium-based-battery-development-doe )

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Sodium battery design Anode Cathode Overall 2Na = 2Na+ + 2e- I2 + 2e- = 2I- 2Na + I2 = 2Na+ + 2I- E0 = 2.71V E0 = 0.54V E0 = 3.25V Sodium-Iodine Battery Chemistry Sodium-conductive ceramic separator • Physical barrier between anode and cathode improves efficiency and eliminates crossover • High sodium-ion conductivity for fast charge/discharge • Proprietary sodium (Na) superionic conductor (Nasicon) which is stable against molten sodium • Scaling from 100 Watt-hour to 250 Watt-hour modules 100 Wh NaSICON Tube 250 Watt-hour Focus on safety and low cost • Inherently safe chemistry – nonflammable • Projected cost: $35-100 / kWh, 3-10X below lithium 250 Wh Nasicon tube

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