United States Patent and Trademark Office >>
Patent for Composite Lithium Borates and/or Phosphates and Polymer Coatings for Active Material Particles Granted to StoreDot
A major barrier in battery technology concerns safety requirements, particularly when batteries are overheated or overcharged, resulting in thermal runaway, cell breakdown, and possibly fire or explosion. Additionally, a short circuit or a design defect may also bring about battery failure resulting in fire and safety risks. Lithium ion batteries in particular, while having operational advantages, are potentially flammable due to their high reactivity, particular when in contact with humidity.
This patent granted to StoreDot covers improved anodes and cells, which enable fast charging rates with enhanced safety due to much reduced probability of metallization of lithium on the anode, preventing dendrite growth and related risks of fire or explosion.
Anodes and/or electrolytes have buffering zones for partly reducing and gradually introducing lithium ions into the anode for lithiation, to prevent lithium ion accumulation at the anode electrolyte interface and consequent metallization and dendrite growth.
Various anode active materials and combinations, modifications through nanoparticles, and a range of coatings which implement the improved anodes are covered.
