COMPOSITE CERAMIC ELECTROLYTE PARTICLE WITH HYDROPHOBIC PROTECTIVE LAYER FOR BATTERY ELECTRODE

A composite ceramic electrolyte particle with a hydrophobic protective layer for a battery electrode, wherein the composite ceramic electrolyte particle is a composite LLZO particle. The composite LLZO particle includes a first LLZO particle. A first hydroxide ion layer is coated on the first LLZO particle to form a second order LLZO composite particle. A first dopamine layer is coated on the second order LLZO composite particle to form a hydrophobic LLZO particle. An outer hydrophobic layer is coated on the hydrophobic LLZO particle to form the composite LLZO particle. The outer hydrophobic layer includes a plurality of peripheral composite particles. Each of the peripheral composite particles includes a peripheral particle. A second hydroxide ion layer is coated on the peripheral particle. A second dopamine layer is coated on the second hydroxide ion layer.