The World Needs Better Batteries!
Amprius Technologies Passes Military Performance Specification Nail Penetration Test with Unprecedented 390 Wh/kg Cell


Why is battery technology evolving so slowly?

The main reason for the slow pace of battery improvement is chemistry. In conventional lithium-ion batteries the anode is made of carbon in the form of graphite, and graphite has reached its energy density limit.

A new anode material is required to improve battery performance, and that material is silicon. Silicon can store up to 10 times more lithium compared to graphite which enables batteries to have much greater energy. But silicon swells dramatically when it is charged with lithium and that can cause it to crack and stop working.



Amprius’ 100% silicon nanowire* technology

In 2007, scientists at Stanford University discovered a solution to the swelling problem of silicon anodes. Silicon nanowires were shown to tolerate swell and resist cracking. Amprius has perfected this technology and the result is the world’s first 100% silicon nanowire* anode for lithium-ion batteries.

The 100% silicon nanowire* anode is a direct replacement for graphite anodes. The rest of the battery components and manufacturing methods leverage the established global supply chain for lithium-ion batteries.

Benefits of Using Nanowires

  • Nanowires tolerate volume expansion and are rooted to the substrate
  • Nanowires have micro and macro porosity that accommodate swell
  • Nanowires improve Solid-Electrolyte-Interphase & cycle life
  • Anode thickness is reduced to half of a graphite electrode thickness

Advantages of Amprius’ 100% silicon nanowire* batteries

Highest content active silicon material – 100% silicon*: Because silicon is the best material for energy density, using 100% silicon* means that we can provide lithium-ion batteries with the highest energy density.

High conductivity and connectivity: Silicon nanowires are connected directly to the substrate with no binders. This means that there is nothing to block the flow of current. Our nanowire technology enables the highest ratio of energy to power.

Excellent cycle life: Amprius Technologies’ 100% Silicon Nanowire* Batteries have excellent cycle life that is continuously improving. This has been demonstrated in real world use with multiple organizations including US National Labs and major aerospace companies.



Revolutionizing battery technology
Amprius Technologies’ 100% silicon* lithium-ion batteries are game-changers. Having the highest energy density in the industry, our batteries can substantially improve the performance of electric vehicles, aircraft, drones, and wearables.

Urban Air Mobility – estimated flight time based on customer models
Soldier Power – real data based on Conformal Wearable Battery developed for US army
Smartwatch – customer-reported data
Electric Vehicle – estimated relative to Tesla Model 3 long-range battery specifications

Chart showing the present and future evolution of battery technology and performance


The future of batteries
Going forward, Amprius Technologies has an extensive product roadmap that further leverages 100% Silicon Nanowire* anodes. We are actively scaling silicon anode manufacturing to allow more industries to take advantage of our products. Our high performance lithium-ion batteries are currently being used in premium and mission critical applications and will soon expand to EV and consumer applications as our manufacturing capacity grows.
Disclaimer: Please note that this presentation contains forward-looking statements. These statements are based on Amprius’ technology, business and expected market opportunities and are subject to uncertainty and changes in circumstance, many of which are beyond Amprius’ control, which may cause actual results to differ materially from those expressed or implied in such forward-looking statements. For a more complete discussion on forward-looking statements and the uncertainties related to Amprius’ technology, business and expected market opportunities, please refer to its filings with the Securities and Exchange Commission, including the discussion of Amprius’ risk factors in its 8-K filed on September 16, 2022.