Methods of preparing anodes using tin as active material
First Claim
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1. A method for preparing a lithium ion cell comprising:
- attaching nanoparticles to anode active material particles that comprise 5-80% tin, wherein the nanoparticles are at least one order of magnitude smaller than the anode active material particles,preparing an anode from the anode active material particles having the attached nanoparticles, andpreparing a lithium ion cell using the prepared anode.
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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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15 Claims
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1. A method for preparing a lithium ion cell comprising:
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attaching nanoparticles to anode active material particles that comprise 5-80% tin, wherein the nanoparticles are at least one order of magnitude smaller than the anode active material particles, preparing an anode from the anode active material particles having the attached nanoparticles, and preparing a lithium ion cell using the prepared anode. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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Specification