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Saint Jean Carbon - Director, Zhongwei Chen.
Director, Zhongwei Chen.
Source: University of Waterloo.
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  • Saint Jean Carbon (SJL) has reported test data for its solid electrolyte batteries
  • Capacity retention after 3,000 charge/discharge cycles from Solid Ultrabattery’s LiFePO4 coin cells indicates a high coulombic efficiency close to 100 per cent
  • Cells were tested at a C-rate of 5C and were observed to sustain 80-per-cent capacity retention at 3,000 cycles
  • Additionally, the cells did not catch fire or exhibit any thermal runaway during safety testing
  • The company’s battery plant in Guelph is expected to be fully operational in two weeks
  • Saint Jean is a carbon science company with interests in energy storage and green energy creation and re-creation
  • Saint Jean Carbon (SJL) closed down by 8.33 per cent trading at $0.165 per share

Saint Jean Carbon (SJL) has reported test data for its solid electrolyte batteries.

The capacity retention after 3,000 charge/discharge cycles from subsidiary Solid Ultrabattery’s LiFePO4 coin cells indicates a high coulombic efficiency close to 100 per cent.

After 3,000 cycles of testing at C-rates of 0.2C and 1C charge/discharge, the cells maintained 80-per-cent capacity retention.

The cells were tested at C-rates varied between 0.5C to 10C. The 5C rate was observed to sustain 80-per-cent capacity retention at 3,000 cycles.

The company fabricated the first pouch cells using NMC chemistry and tested them for safety against perforations by subjecting them to a nail penetration test. The cells did not catch fire or exhibit any thermal runaway during safety testing.

The prototype battery fabrication equipment arrived at Saint Jean’s battery plant in Guelph, Ontario in early November and is currently being commissioned. The plant is expected to be fully operational in two weeks. Initial pouch cells will be built in December to test and further validate Solid Ultrabattery’s technology.

Dr. Zhongwei Chen, Director at Saint Jean Carbon, commented,

“I am pleased to see that the initial results of the coin cells performed well, which validates the fidelity of our intellectual property. In the next phase, we plan to refine our solid-state electrolyte formulation and build pouch cells using NMC cathodes.

As we start to build these prototypes from our Guelph plant, we will no longer need to rely on suppliers to provide battery fabrication and test services. This enables us to better protect our intellectual property while we attempt to fully develop this battery technology rapidly.”

Saint Jean is a carbon science company with interests in energy storage and green energy creation and re-creation.

Saint Jean Carbon (SJL) closed down by 8.33 per cent trading at $0.165 per share.

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