Solid Power SPAC Presentation Deck

Key Performance Metric Definitions Category Energy Density Power Density Charge Rate Cycle Life Calendar Life Operating Temperature Safety Conductivity Manufacturability Thermal Stability Li Metal Stability Moisture Stability Solid Power DCRC Description Measure of how much energy a battery contains relative to its weight (Wh/kg) or volume (Wh/L) Measure of the max rate of charge / discharge per weight of battery Time (in minutes) it takes to recharge the battery often defined as the C Rating; a battery with a 1C rate will take 60 minutes to full charge Number of charge and discharge cycles that a battery can sustain until its capacity falls below 80% of the original capacity The time for which a battery can be stored, as inactive or with minimal use, such that its capacity remains above 80% of the original capacity Ability of the battery to perform across a wide range of temperatures, particularly are ambient and low temperatures; EVS use thermal management systems to support stable operation in required temperature ranges Robustness of cell design and operation with respect to minimizing the risk of fire or explosion on battery failure Measure of how electrical current moves within the solid electrolyte in Siemens per meter (S/ m) Ease of processability to work electrolyte into a battery cell in a scalable process Stability of electrolyte material over a wide temperature range, especially at high temperatures Appendix Degree of reactivity / interfacial resistance the solid electrolyte has with a Li Metal anode Degree of reactivity the solid electrolyte has with moisture or water 48

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