Cathode material and method for manufacturing the same

Abstract

To provide a cathode material and a method of manufacturing the same.SOLUTION: A cathode material comprises a core made of a first material and a coating made of a second material and wrapping the core. The first material is a composition that is represented by the formula: LiNi0.5Mn1.5O4-δ (δ>0). The second material is a ternary halide containing lithium.SELECTED DRAWING: Figure 1

Claims

1. A cathode material comprising a core made of a first material and a coating made of a second material that surrounds the core, A cathode material characterized in that the first material is a composition represented by LiNi0.5Mn1.5O4-δ and δ>0, and the second material is lithium indium halide (LiInCl6).

2. The cathode material according to claim 1, characterized in that the second material is a composition represented by LiaMXb, and M is a non-lithium metal, X is a halogen, and a and b are positive integers.

3. The cathode material according to claim 1, characterized in that the thickness of the coating is 5 to 60 nm.

4. A nickel-manganese metal solution, a sodium hydroxide solution, and an ammonia solution are mixed in a container to obtain a precipitate, the precipitate is dried and sieved to obtain a nickel-manganese precursor, in a coprecipitation step. A sintering step is performed in which a lithium salt is added to the nickel-manganese precursor and the material is sintered in a low-oxygen environment to obtain the first material. A method for producing a cathode material, comprising a coating step in which a coating mixture is obtained by adding the first material to a halogen, the coating mixture is dried, and the cathode material is obtained by sintering in a vacuum environment, A method for producing a cathode material, characterized in that the nickel-manganese metal solution has a molar ratio of nickel to manganese of 1:

3.

5. The method for producing a cathode material according to claim 4, characterized in that the sintering step is carried out in a nitrogen atmosphere.

6. The method for producing a cathode material according to claim 4, characterized in that the sintering step is performed at 500°C to 1000°C for 1 to 13 hours.

7. The method for producing a cathode material according to claim 4, characterized in that, in the coating step, the weight of the halogen accounts for 1 to 10% of the total weight of the coating mixture.

8. The method for manufacturing a cathode material according to claim 4, characterized in that sintering is performed at 150°C to 250°C for 4 to 6 hours in the coating step.

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