US Battery manufacturer Cuberg said it achieved a near-doubling of cycle life of its cells alongside improvement in energy and power.
Cuberg said testing of 5Ah pouch cells by independent third-party testing company Mobile Power Solutions had confirmed that cycle life had been extended from 370 to 672 cycles, with 80% capacity retention when testing ended.
The sample was charged at rates of C/2 charge and 1C discharge, with an hour’s rest in between.
The company said the cell started at an initial capacity of 4.28Ah and ended at 3.43Ah with each cycle started at 4.28 V and ended at 3.0V.
Its batteries are based on a non-flammable electrolyte combined with a lightweight lithium metal anode.
The company said the latest results confirm its lithium metal technology “can fulfil all key performance requirements”.
Cuberg said its lithium metal cells can be produced on existing lithium-ion manufacturing lines for electromobility solutions.
Northvolt buys Cuberg
In March, gigafactoty developer Northvolt bought Cuberg, which was spun out of Stanford University in 2015 with the goal of commercialising battery technology based on a liquid electrolyte combined with a lithium metal anode.
The firms aim to industrialise cells in 2025 that exceed 1,000Wh/L, while meeting automotive customer requirements.