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US 2020/0006759 A1Published application
Core-shell-composite particles for anode materials of lithium-ion batteries
AssigneeWacker Chemie AG
InventorsSefer Ay, Robert Maurer, Jürgen Stohrer, Jennifer Wegener
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Abstract
The invention relates to core-shell composite particles, wherein the shell is based on carbon and is nonporous and the core is a porous aggregate containing a plurality of silicon particles, carbon and optionally further components, where the silicon particles have average particle sizes (d50) of from 0.5 to 5 μm and are present in the core in a proportion of ≥80% by weight, based on the total weight of the core-shell composite particles.
Claims15
A core-shell composite particle, comprising:
- a shell based on carbon and is nonporous, and
- a core, the core is a porous aggregate containing a plurality of silicon particles and carbon, wherein the silicon particles have average particle sizes d50 of from 0.5 to 5 μm and are present in the core in a proportion of ≥80% by weight, based on the total weight of the core-shell composite particle, and the core-shell composite particle contains from 91 to 99% by weight of silicon particles, based on the total weight of the core-shell composite particle, with the proviso that the core-shell composite particle docs not contain any graphite.
Dependencies are inferred from the claim text.