Solid Power SPAC Presentation Deck

Lithium Metal Anode Battery Roadmap Improvements in cell-level energy achieved through well-defined cell design optimization plan Anode Current Collector Anode Cathode Cathode Current Collector Ultra-Thin Lithium Metal Solid Electrolyte NMC811 Li Metal Electrolyte Conductive Carbon Active Material Catholyte Binder Pre A-Sample 320 Wh / kg, 550 Wh / L¹ Pouch Energy Density C/10 Room temperature max charge rate Today A-Sample Target Key Design Optimizations (Pre-A Sample to A-Sample) Increase footprint and number of layers Minimize resistance within layers Improve charge rate capability at low temperatures Note: All energy densities based on volumes of fully-charged cells. Refer to slide 49 for definitions of Sample stages. 1. As measured in 20 Ah cell. Solid Power | DCRC Commercialization Roadmap 360 Wh / kg, 760 Wh / L Pouch Energy Density 1C Room temperature max charge rate Decrease separator thickness Decrease stack pressure requirement ✓ Increase cathode specific capacity B-Sample Target 440 Wh / kg, 930 Wh / L Pouch Energy Density Room temperature max charge rate Key Design Optimizations (A-Sample to B-Sample) 2C+ Increase mAh /cm² ✓ Decrease separator thickness ✓ Increase cathode specific capacity Commercial Design Freeze 37

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