Tin silicon anode active material
First Claim
1. An anode, comprising anode active material particles which comprise 5-80% tin, wherein the anode active material particles further comprise nanoparticles attached thereto, wherein the nanoparticles are at least one order of magnitude smaller than the anode active material particles.
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Abstract
Improved anodes and cells are provided, 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 provided.
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Citations
13 Claims
- 1. An anode, comprising anode active material particles which comprise 5-80% tin, wherein the anode active material particles further comprise nanoparticles attached thereto, wherein the nanoparticles are at least one order of magnitude smaller than the anode active material particles.
Specification