Amprius Battery Technology and Expansion Plan

GRAPHITE VS. SILICON Why Silicon? 100% Silicon Anode (1) Has ~10x Capacity vs. Graphite Actual Anode Capacity Silicon anode can swell up to ~300% causing battery damage after a few cycles Before Cycling After Cycling Broken silicon particles 355 mAh/g 3,400 mAh/g Graphite (2) Silicon (2) Silicon Particles Anode Amprius Silicon Nanowire Anode 1.1.1 Silicon particles fail during cycling 1.1.3.6.1 (1) Actual percentage of silicon is 99.5-99.9% which is within the range of acceptable purity levels for materials that are considered 100%. (2) Based on Amprius measurements in half cells. Silicon nanowire structure maintains its form amprius 10

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