Cathode active material for lithium-ion batteries and method for manufacturing the same

Non-rocksalt layered cathode material with lithium occupying octahedral and tetrahedral sites

This technology is a non-rocksalt layered cathode active material designed to place lithium in both octahedral and tetrahedral sites by adjusting the composition of lithium and transition metals to maintain charge neutrality while disrupting spatial equilibrium.

Conventional rocksalt-based lithium-rich cathode active materials suffer from low oxygen stability within the Li-O-Li local structure, leading to structural collapse (spinel transformation) and voltage decay during charge-discharge cycles, as well as performance degradation caused by irreversible oxygen gas evolution.

By incorporating excess lithium to occupy both octahedral and tetrahedral sites, this technology reconstructs the non-hybridized oxygen state of Li-O-Li, making it ideal for simultaneously improving the reliability and efficiency of lithium-ion battery cathode materials.

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Key Features:

• Cathode active material for lithium-ion batteries with a specific chemical composition and a non-rocksalt layered structure
• Cathode active material designed with an excess of lithium that deviates from spatial equilibrium
• Structure where the excess lithium is arranged to occupy both octahedral and tetrahedral spaces
• Configuration that adjusts the composition of lithium and transition metals to maintain charge neutrality while disrupting spatial equilibrium

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