Solid Power SPAC Presentation Deck

Transaction Summary Offering Size Valuation Pro-Forma Capital Structure Pro-Forma Ownership Listing/Ticker Decarbonization Team & Investment Focus ■ Solid Power DCRC ■ 1. Assumes no redemptions from public stockholders of DCRC. Decarbonization Plus Acquisition Corporation III (NASDAQ: DCRC) is a publicly listed special purpose acquisition company with approximately $350 million of cash held in trust. DCRC has entered into a business combination agreement with Solid Power PIPE size of $165 million Transaction reflects an approximate $1.2 billion enterprise value Implies a steep discount to peer trading levels Net of transaction expenses, Solid Power will have $599 million of cash to fund operations and growth¹ No additional capital requirements necessary to deliver on business plan ~67% existing Solid Power shareholders, ~24% SPAC and founder shares, ~9% PIPE investors NASDAQ: SLDP (post-merger) Erik Anderson | Chief Executive Officer Founder & CEO, WestRiver Group Exclusive focus on innovation economy, disrupter/attacker business models, brand leaders in breakthrough categories Early-stage investor history: Docusign, Teledoc, TopGolf ■ ■ Robert Tichio | Chairman 16-year history, Riverstone Holdings LLC Partner; Menlo Park & New York ESG & Sustainability investment strategy oversight ■ ■ ■ ▪ DCRC priced IPO in March 2021 Exclusive focus on six decarbonization families: ■ 1. Electrification of transport 2. Greening of fossil fuels 3. Grid flexibility & resilience 4. Agriculture 5. Next generation liquids fuels (e.g., hydrogen) 6. Next horizon resource use (e.g., smart buildings) 6

View entire presentation