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US 2026/0128320 A1Published application
Cathode active material coated with lithium borate doped lithium carbonate and sulfide all-solid-state battery comprising same
AssigneeFactorial Inc.
InventorsMinh Nguyen, Fang Hao, Joanna Burdynska
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Abstract
Disclosed are cathode active material (CAM) coated with a lithium carbonate doped with lithium borate with a formula of Li2+xC1−xBxO3 wherein 0<x<0.5 and a preparation method therefor. Also disclosed is a cathode layer comprising the coated CAM in the form of particles. In one embodiment, an all-solid-state battery comprising the cathode layer exhibits improved stability and cycling performance.
Claims21
1-28. (canceled)
A coated cathode active material comprising:
- particles of a cathode active material (CAM);
- and
- a coating coated on surface of the particles,
- wherein the coating comprises a lithium carbonate doped with lithium borate (LCBO) having a formula of Li2+xC1−xBxO3, wherein 0<x≤0.3, and wherein the coating has a thickness in a range from 0.5 to 20 nm, and the LCBO is formed between lithium carbonate on surface of the particles of the CAM and lithium borate or a precursor of lithium borate,
- wherein the coating comprising the LCBO is prepared by:
- a) applying to the particles of the CAM with a coating solution comprising a solvent, a lithium precursor and a borate precursor, leading to particles of the CAM coated with the lithium precursor and the borate precursor after removal of the solvent;
- and
- b) annealing the particles of the CAM coated with the lithium precursor and the borate precursor, wherein lithium carbonate on surface of the particles of the CAM, the lithium precursor and the borate precursor are converted into the LCBO, thereby obtaining particles of the CAM coated with the LCBO.
5 more elements
Dependencies are inferred from the claim text.