Cathode active material and lithium ion battery comprising said cathode active material
AssigneeBayerische Motoren Werke Aktiengesellschaft
InventorsRoland Jung, Thomas Woehrle
Life of this patent
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Abstract
A cathode active material for a lithium ion battery includes particles having a core-shell structure, where each of the particles has a core including a core material and a shell including a shell material. The core material is selected from the group consisting of: layered oxides, including overlithiated layered oxides, compounds having an olivine structure, compounds having a spinel structure, and combinations thereof. The shell material includes a spinel compound. The shell material and/or the core material is at least partially delithiated.
Claims8
A cathode active material for a lithium-ion battery, the cathode active material comprising:
- particles having a core-shell structure, each of the particles having a core comprising a core material and a shell comprising a shell material, wherein
- the core material is selected from the group consisting of:
- layered oxides, including overlithiated layered oxides, compounds having an olivine structure, compounds having a spinel structure and combinations thereof,
- the shell material comprises a manganese-containing spinel compound where manganese is the only transition metal present, the shell material being λ-Mn204 or LixMn204,
- the shell material has a degree of lithiation of x≤0.9, and
- the core material is optionally at least partially delithiated.
Dependencies are inferred from the claim text.