Positive active material for rechargeable lithium battery and method of preparing same
AssigneeSamsung SDI Co., Ltd.
InventorsHo-Jin Kweon, Joon-Won Suh
Life of this patent
Estimating the term…
Abstract
A positive active material for a rechargeable lithium battery. The positive active material includes a core and a surface-treatment layer on the core. The core includes at least one lithiated compound and the surface-treatment layer includes at least one coating material selected from the group consisting of coating element included-hydroxides, oxyhydroxides, oxycarbonates, hydroxycarbonates and any mixture thereof.
Claims21
A positive electrode for a rechargeable lithium battery, comprising:
- a positive active material comprising:
- a core comprising at least one lithiated compound;
- and
- a surface-treatment layer on the core to form the positive active material, the surface-treatment layer comprising a coating material selected from the group consisting of non-lithium hydroxides, non-lithium oxyhydroxides, non-lithium oxycarbonates, non-lithium hydroxycarbonates and mixtures thereof,
- the coating material comprising a coating element selected from the group consisting of Mg, Co, Ca, Sn, V, Ge, Ga, As, Zr, and mixtures thereof, and the coating material having an amorphous form.
A positive active material for a rechargeable lithium battery, comprising:
- a core comprising at least one lithiated compound;
- and
- a surface-treatment layer on the core to form the positive active material, the surface-treatment layer comprising a coating material selected from the group consisting of non-lithium hydroxides or non-lithium oxyhydroxides, the coating material comprising a coating element selected from the group consisting of Sn, Ge, Ga, As, Zr, and mixtures thereof, and the coating material having an amorphous form.
A positive active material for a rechargeable lithium battery, comprising:
- a core comprising a lithium-cobalt chalcogenide compound, wherein the lithium-cobalt chalcogenide compound comprises a powder that has been heat-treated at least once with a metal source;
- and
- a non-lithium surface-treatment layer, on the core, including HB(OH)2.
A positive active material for a rechargeable lithium battery, comprising:
- a core comprising at least one lithiated compound;
- and
- selected from non-lithium hydroxides, non-lithium oxyhydroxides, non-lithium oxycarbonates, non-lithium hydroxycarbonates, and mixtures thereof, the coating material comprising an element selected from the group consisting of Sn, Ge, Ga, As, Zr, and a mixture thereof, and the coating material having an amorphous form, wherein the amorphous surface treatment layer is uniformly formed on the core.
Dependencies are inferred from the claim text.