Advent SPAC Presentation Deck

Advent Fuel Cells Outperform Competition Any Fuel, Anywhere Long lasting Fuel-Flexible Resilient High Power Cost Competitive ● ● ● ● Advent technology allows fuel cells to be: Bringing down cost/kW - Advent's fuel cell technology enables longer-lasting, lower cost, more robust and more powerful fuel ● cells • The same holds true for air purity; air pollution decreases power in low temperature fuel cells Degradation is still a problem for fuel cells Advent can more than triple lifetime (~10,000 hrs to 10% power loss vs 3,500) Hydrogen infrastructure can be delivered quickly and efficiently with methanol or other hydrogen sources such as biogas Impurities in regular hydrogen such as 10 ppm CO (carbon monoxide) kill a low temperature fuel cell - our materials withstand > 2 % CO Reducing humidity and temperature issues increases life and reduces cost, and these units work anywhere in the world Low temperature cannot run hot and dry - no less than 50% Relative Humidity (RH) and not hotter than 70 °C while our technology runs from 0% RH (Nevada) to 100% (Florida in the summer) • At least as powerful as current tech (1,100 mW/cm2 peak power) without the extra weight and volume of complex oling and water management Roll-to-roll processing mated to catalyst technology that reduces platinum 8-10 fold Simpler system design and fuel flexibility drop TCO massively www.advent.energy Advent vs incumbent LT-PEM technology -HT PEM Advent -Low Temp Lifetime/60 (hrs to 10% Voltage loss) Fuel Flexibility [CO Tolerance/1000 (ppm)] Resilience -Highest T 160 120 100 Runs Humid or Dry [%RH range (delta)] Peak Power/10 (mW/cm^2) AMCI ADVENT Acquisition Corp. 22

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