By coating the iron sulfide cathodes in polymers, a research team was able to create transition-metal sulfide-based lithium batteries with stable cycling and high safety. After 300 cycles, a lithium carbide iron disulfide pouch cell retained 72.0% capacity with no capacity degradation after 100 cycles.
  • @0x0English
    7•5 hours ago

    After 300 cycles, a lithium carbide iron disulfide pouch cell retained 72.0% capacity

    Put that on a phone and the battery will degrade almost 30% in one year… seems a lot tbh.

  • peopleproblemsEnglish
    11•10 hours ago

    But, do they cause a runaway thermal reaction if pierced?

    I demand spicy pillows, not mild ones

    • @nousEnglish
      4•5 hours ago

      One of the fabricated battery pouch cells was even able to work after being folded and cut off. “That proves its high safety for practical application,” the researchers emphasized.

      If you can cut it in half and it still works I doubt piercing it will do much.

  • @[email protected]English
    27•14 hours ago

    I really like the safety aspect of this, but 72% capacity after 300 cycles seems low. What’s a use case scenario where this is preferable over lipo batteries?

    • @[email protected]English
      33•14 hours ago

      Much more stable chemistry. In stationary applications, like UPS systems and off grid electrical systems, lead acid is still the standard, due to having stable chemistry, very unlikely to catch fire, and a cost to capacity ratio that is still very good.

      The degradation seems pretty bad, but if it’s stable from 300 cycles onwards, you could take 75% as the actual capacity of the battery.

    • TerkErJerbsEnglish
      9•14 hours ago

      Boats, planes, drones, phones, bikes… Anywhere that you can maximize storage cell capacity in odd shaped volumes and spaces/designs. It’s great.