—Frequently asked questions
Pure-silicon anodes, answered.
Direct answers on product specifications, samples, compatibility and volume supply.
01Technology
- What does 100% active material mean?
- The active material is 100% silicon — there is no graphite in the blend. As in any lithium-ion electrode, the coated film also contains a small amount of conductive additive and binder (the electrode is about 80–85% silicon by weight). '100%' means the active material is entirely silicon, not a silicon-graphite mix — so the cell gets the full capacity of silicon instead of a diluted fraction of it.
- How high is the first-cycle efficiency?
- 70.energy's prelithiated pure-silicon anodes reach full-cell first-cycle efficiency of up to 99%. Prelithiation compensates the silicon anode's large first-cycle loss; the small remaining loss is cathode- and electrolyte-limited, as in any lithium-ion cell.
- Why up to 5% over-lithiation?
- The anode contains up to 5% extra lithium. This controlled buffer compensates the silicon anode's initial lithium loss and supports stable performance from cycle one.
- How does 70.energy's prelithiation compare to other methods?
- Chemical prelithiation adds lithium-rich additives to the electrolyte — effective, but it modifies the electrolyte chemistry and must be tuned per cell design. Electrochemical prelithiation pre-charges the anode in a separate step, adding equipment and process complexity. 70.energy integrates prelithiation into the anode production process: the anode arrives prelithiated, the cell maker assembles normally, no electrolyte modification, no extra assembly step. Compatible with LFP, LCO and NMC.
02Samples & supply
- How do I order samples and what do I get?
- Request first samples at 70.energy/samples. Available formats are anode sheets, material rolls, coin cells and small pouch cells. Every first order includes a free electrolyte consultation matched to your LFP, LCO or NMC chemistry. We reply within 2 business days.
- What volumes can you supply?
- Samples are step one. From a successful evaluation we scale to volume supply at production scale — or set up a joint mass-production project in which we industrialize a dedicated line or shared program with you.
03Manufacturing
- Where can I learn about prelithiation equipment?
- Technical information about prelithiation, production integration and the corresponding equipment is available at pre-lithiation.com. 70.energy focuses on supplying ready-to-evaluate anodes, cells and material rolls.
- Which chemistries are compatible?
- The anodes are compatible with LCO, LFP and NMC cathodes. Cycle stability has been measured across all three: 500 cycles with roughly 2% degradation on LFP, LCO and NMC cells.
04Company & market
- What does 70.energy do?
- 70.energy supplies prelithiated pure-silicon anodes: 100% silicon active material, full-cell first-cycle efficiency up to 99% and up to 5% over-lithiation buffer. Anode sheets, material rolls, coin cells and small pouch cells can be ordered as samples today, with a route to volume supply or a joint mass-production project.
- Who is it for?
- The product is for cell manufacturers, Li-ion capacitor producers and OEMs in robotics, spacetech and drones. End markets include heavy-lift drones, humanoid robotics and EV/motorsport.
- How does 70.energy make money?
- Through material and product supply plus IP licensing, earning a recurring per-kWh licence wherever cells are made. The technology is protected by foundational IP — patents granted in JP, US and CN, EP pending, plus PCT applications.
—Talk to the team