Solid Power DCRC+ Financial Overview

Commercialization Roadmap High-Content Silicon Anode Battery Roadmap Improvements in cell-level energy achieved through well-defined cell design optimization plan. Anode Composite Pre A-Sample A-Sample Target Anolyte 320 Wh/kg, 740 Wh / L¹ Pouch Energy Density 340 Wh / kg, 770 Wh / L Pouch Energy Density Anode Current Collector Anode High-Content Silicon Electrolyte Solid Electrolyte Conductive Carbon Cathode NMC811 Active Material Cathode Current Collector Catholyte Binder B-Sample Target 390 Wh / kg, 930 Wh / L Pouch Energy Density 2C Room temperature max charge rate 3C Room temperature max charge rate Key Design Optimizations (Pre-A Sample to A-Sample) Increase footprint and number of layers ✓ Decrease stack pressure requirement Match small pouch cell performance on higher throughput 100 Ah cell pilot line Minimize resistance within layers 3C+ 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. Projected to 100 Ah cell based on cell stack-level values 340 Wh / kg and 900 Wh / L. Solid Power DCRC+ Commercial Design Freeze 36

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