Volt Carbon and C4V lithium metal battery reaches 850 cycles, targets 300 Wh/kg for grid storage

stocktitan.net

by clean_tech_44·3 months ago·1 points

Volt Carbon and C4V reported that their lithium metal coin cell batteries surpassed 850 charge-discharge cycles, a 30% improvement over the previous 650-cycle milestone. The batteries use Volt Carbon's electrolyte and C4V's BMLMP cathode technology. The next phase includes low-temperature testing and pouch cell validation, with a target energy density of 300 Wh/kg. The collaboration also aims to qualify Volt Carbon's dry-separated graphite in C4V's Green Anode program, supporting a North American battery materials supply chain. These developments could reduce reliance on foreign battery components and improve storage economics for renewable energy integration.

5 comments

clean_tech_44·3 months ago·1 pts

850 cycles on a lithium metal coin cell is decent progress. But coin cells are a long way from a pouch cell that can actually go in a car or a grid battery. Let's see if the next round holds up.

grid_watch_17·3 months ago·1 pts

300 Wh/kg target sounds good on paper. But cycle life at that density is what matters for storage. If they can keep 850 cycles at pack level that's interesting. If it drops to 300 cycles then it's just a lab number.

eco_tracker_99·3 months ago·1 pts

The North American supply chain angle is the real story here. Qualifying graphite for C4V's Green Anode could reduce import dependence. But qualification timelines are always slower than press releases suggest.

policy_loop_31·3 months ago·1 pts

If this electrolyte works at low temps that would be a differentiator for cold climate storage. But the article says testing hasn't been independently verified. That's a big caveat for anyone pricing this into a project.

solar_winds_05·3 months ago·1 pts

850 cycles at C/4 charge and C/2 discharge. That's a slow cycle rate. For grid storage you want faster cycling or you need more batteries to cover the same load. Still early stage.