Amprius Battery Technology and Expansion Plan

SILICON ANODE STRUCTURE Amprius Solved the #1 Problem with Silicon Anodes 100% Silicon Nanowires(1) Allow Volume Expansion without Binders, Graphite or any Inactive Materials SILICON SURFACE SILICON COATING COATING Silicon Nanowires Conventional Graphite (and/or Silicon) Particles SILICON NANOWIRE TEMPLATE SUBSTRATE 1111 b Side View Top View Spacing between nanowires and silicon porosity accommodate silicon volume expansion • lons and electrons travel straight paths • Most conductive path for ions and electrons results in high power capability and fast charge rate (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%. amprius 11

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