LiFePO4 Coin Cells
Initial test data from batteries built using Solid Ultrabattery’s proprietary solid electrolyte battery.
The results of 3000 charge/discharge cycles from our LiFePO4 coin cells is shown in the figures below. The capacity retention of these cells indicate a high Coulombic efficiency (CE) close to 100% as shown in Figure 1.
After 3000 cycles of testing at C-rates of 0.2C and 1C charge/discharge, the cells maintained capacity retention of 80% as shown in Figure 2.
As depicted in Figure 3, Solid UltraBattery’s cells were tested at C-rates varied between 0.5C to 10C. The 5C rate was observed to sustain 80% capacity retention at 3000 cycles.
The first pouch cells fabricated with Solid UltraBattery’s solid electrolyte technology were made using an NMC chemistry and tested for safety against perforations by subjecting the pouch cell to a nail penetration test. The video below shows a view of the pouch cell during the penetration test. It was observed that Solid UltraBattery’s cells did not catch fire or exhibit any thermal runaway during the safety testing, as seen in the video below.