Exhibit 99.1 SOLID POWER REPORTS THIRD QUARTER 2025 RESULTS LOUISVILLE, Colo., November 4, 2025 – Solid Power, Inc. (Nasdaq: SLDP), a leading developer of solid-state battery technology, today announced its operational and financial results for the third quarter of 2025. Recent Business Highlights "This Joint Evaluation Agreement marks meaningful advancement in Solid Power's path toward commercialization. Our electrolyte sampling efforts have culminated in this strategic partnership with Samsung SDI and BMW ...