Solid Power DCRC+ Financial Overview

Commercialization Roadmap Lithium Metal Anode Battery Roadmap Improvements in cell-level energy achieved through well-defined cell design optimization plan Anode Current Collector Pre A-Sample A-Sample Target Li Metal 320 Wh / kg, 550 Wh / L¹ Pouch Energy Density 360 Wh / kg, 760 Wh / L Pouch Energy Density C/10 Electrolyte Anode Ultra-Thin Lithium Metal Solid Electrolyte Conductive Carbon Active Material Cathode NMC811 Cathode Current Collector Catholyte Binder B-Sample Target 440 Wh / kg, 930 Wh / L Pouch Energy Density Room temperature max charge rate 1C Room temperature max charge rate 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 ✓ Decrease separator thickness Decrease stack pressure requirement ✓ Increase cathode specific capacity 2C+ Room temperature max charge rate Key Design Optimizations (A-Sample to B-Sample) ✓ Increase mAh/cm² ✓ Decrease separator thickness Increase cathode specific capacity Today 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+ Commercial Design Freeze 37

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