1. A Breakthrough Technology for Energy Storage e-Zn

2. An Electrochemical Reactor - for storing electricity in zinc metal Energy storage section - $15/kWh Charging section - Zinc metal deposition Discharging section - Zinc metal dissolution Zinc + KOH e-Zn Structurally, the reactor has with three distinct sections: 1) a charging device on the top section to for energy absorption through zinc deposition, 2) a discharging device at the bottom section for energy delivery through zinc dissolution and 3) the mid section in between for energy storage.

3. 1.Using zinc metal -Cheap -High energy density 2. Separation of energy storage from energy conversion - Low cost material (energy) storage 3.In-cell storage section - Simple & easily scalable Principles for Low Cost Zinc + KOH e-Zn

4. Key Advantage - Low Cost Capacity Expansion $15/kWh Zinc + KOH e-Zn

5. Zinc: $5 ( 2kg) KOH: $5 (6kg) Containment: $5 (polymer) Storage at $15/kWh e-Zn

6. Low Cost for Long Duration System System with two-day capacity: $50/kWh e-Zn

7. Advantages over Batteries Low cost for capacity expansion –$15/kWh versus > $400/kWh for lithium batteries Inherently long life – simple mechanical operation –batteries chemically degrade on charge/discharge No capacity fading with time –capacity fades with time for batteries Non-flammable - aqueous electrolyte –lithium batteries use organic electrolyte – safety managed with sophisticated BMS e-Zn

8. First Product 1-20kW/24 hour storage system (12 hours cycling capacity + 12 hours reserve capacity) Value to users - Efficient-economical use of solar energy - Power independence from grids - Back up for power outages - Reserve capacity for raining days For each 1kW-24 kWh e-ZnBatteries $2400($100/kWh)$9,600 ($400/kWh) e-Zn

9. System with 2 Days Capacity - 12 hours daily cycling + 36 hours reserve capacity 24 hours (24kWh) $600 $9,600 + e-Zn: $2400 Battery ： $9,600 Per kW 1 day capacity 2 day system = $3,000 $19,200 + = e-Zn

10. Inventor & Founder Gregory X. Zhang, PhD – A visionary and experienced technology developer. He brings more than 20 years of research and development experience in zinc materials processing, electrochemistry, and zinc battery systems. –An acknowledged world-expert in zinc electrochemistry and the author of the book “Corrosion and Electrochemistry of Zinc”, which has been the most comprehensive book on the subject since its publication in 1996. Authored more than 50 peer-reviewed technical publications and holds a number of patents in the field.