TIN SILICON ANODE ACTIVE MATERIAL
First Claim
1. An anode comprising anode active material particles which comprise tin.
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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
20 Claims
- 1. An anode comprising anode active material particles which comprise tin.
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16. A method of making a Li-ion energy storage device, comprising:
- combining metalloid particles having a particle size of 100-500 nm and comprising a metalloid selected from the group consisting of Sn, Pb, Ge, Si, and alloys thereof, with B4C nanoparticles having a particle size of 10-50 nm, to form an anode active material.
- View Dependent Claims (17)
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18. A method comprising preparing an anode for a lithium ion cell from tin active material particles by forming a slurry with the tin active material particles, a solvent, and at least one additive selected from the group consisting of conductive particles, binder and plasticizer;
- and removing solvent and consolidating the slurry to form an anode.
- View Dependent Claims (19, 20)
Specification