Pure Lithium says it has cycled its Advanced Anode lithium metal battery more than 9,315 times at 100% depth of discharge, and that the cells are still cycling in its laboratory. The company reported negligible capacity fade over the run.
The cells were charged and discharged at 1C, a rate that fully charges or drains a battery in an hour. Pure Lithium estimates commercial lithium-ion cycle life at 250 to 2,000 cycles, depending on the application.
Larger swings early in the cycling data came from a lack of temperature control and power failures at the company’s original Boston laboratory, according to Pure Lithium.
In January 2025, the company reported more than 2,200 cycles under the same 1C rate and 100% depth of discharge while holding above 80% of capacity, from an anode it had designed to reach 1,000 cycles.
Pure Lithium says replacing the graphite anode in a conventional lithium-ion cell with lithium metal can double a cell’s energy density and cut weight and cost. Cycle life has been the main barrier to commercializing the chemistry. Pure Lithium says no other lithium metal battery in development has matched its result under equivalent testing conditions.
Emilie Bodoin, Pure Lithium’s founder, Chairman and CEO, says cycle life is the single largest determinant of the levelized cost of energy storage (LCOS), and puts the potential reduction from the company’s cycle life at 75%. This performance, she says, opens applications that have been out of reach of lithium metal battery companies, including grid-scale energy storage, data centers and electric vehicles.
“Our achievement of more than 9,315 cycles tells us the lithium metal battery is finally ready to serve these markets,” said Bodoin.
Source: Pure Lithium
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