Solid Power DCRC+ Financial Overview

Products and Technology Proven MWh-Scale Prototype Production Line Nearly identical production process to lithium-ion; future lithium-ion process improvements expected to be transferable Conditioning Assembly Electrode manufacturing 文文 Slurry Mix Slot Die Drying Coating Electrode Slitting Calendaring / Lamination anode seperator cathode Stamping Stacking Consolidation Weld Packaging Filling Pre- Formation Aging Degassing Formation Final Storage Lithium-ion process steps removed in solid-state production + Solid Power Characterization & QC ■ Since inception, compatibility with lithium-ion manufacturing processes has been fundamental to Solid Power's strategy, driving the selection of a sulfide-based solution and subsequent R&D ■ Utilizes industry standard lithium-ion production processes and equipment " - Substantially de-risks commercial success Allows for rapid deployment of technology among early adopter platforms Existing production lines can be transitioned as market demand grows (est. at 10% of cost of new plant) Minimal historical and future capex requirements to prove commercialization Existing lithium-ion production infrastructure accommodates sulfide solid electrolyte moisture sensitivity Solid Power's process eliminates electrolyte filling and formation cycling, which account for approximately 5% and 30% of capex in typical GWh-scale lithium-ion facility, respectively Removing 1.5 to 3-week formation process further improves Solid Power throughput Roll-to-roll production line will have successfully produced 0.2 Ah, 2 Ah and 20 Ah form factors and Li Metal and Si anode cells by end of 2021 Production line can be easily transitioned between Li Metal and Si anode cells - Source: Adapted from Bloomberg NEF. Solid Power DCRC+ Solid Power is positioned to deliver superior cells at scale 29

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