Manufacturing method for cathode active material complex, and lithium secondary battery including the cathode active material complex

Patent metadata

Field	Value
Publication number	US-11101457-B2
Application number	US-201816182954-A
Country	US
Kind code	B2
Filing date	Nov 7, 2018
Priority date	Nov 8, 2017
Publication date	Aug 24, 2021
Grant date	Aug 24, 2021

Abstract

The present disclosure provides a process for the production of a cathode active material complex which is used for a lithium secondary battery, comprising the steps of: mixing a lithium metal phosphate with a solvent to prepare a first precursor; mixing the first precursor with a graphene oxide to prepare a second precursor solution; forming droplets from the second precursor solution; and making the droplets into a powder; wherein the formation of the powder is performed by spray pyrolysis method.

First claim

What is claimed is:

1. A process for the production of a cathode active material complex which is used for a lithium secondary battery, comprising the steps of:
mixing a lithium metal phosphate with a solvent to prepare a first precursor;
mixing the first precursor with a graphene oxide to prepare a second precursor solution;
forming droplets from the second precursor solution; and
making the droplets into a powder;
wherein the formation of the powder is performed by spray pyrolysis method in a reactor at a temperature of between 100° C. and 800° C. and particles of the cathode material complex have hollow shape, wherein a concentration of the first precursor is 0.15 M to 0.45 M.

2. The process of claim 1 , further comprising adding an acid to the second precursor solution between the preparation of the second precursor solution and the formation of the droplets.

3. The process of claim 1 , wherein the first precursor is at least one selected from a group consisting of acetate, nitrate, chloride, hydroxide, carbonate and oxide which contain metal(s).

4. The process of claim 1 wherein the droplets are formed by using an ultrasonic wave.

5. The process of claim 1 wherein droplets are formed by supplying inertia force that can overcome surface tension of the second precursor solution.

Assignees

• Korea Basic Science Inst

Inventors

• Ko You Na
• Kim Hae Jin
• Hong Won Gi
• Lee Jin Bae

Classifications

• H01M4/587

  for inserting or intercalating light metals · CPC title

• H01M4/583

  Carbonaceous material, e.g. graphite-intercalation compounds or CFx · CPC title

• C01B32/23

  Oxidation · CPC title

• Y02E60/10

  Energy storage using batteries · CPC title

• H01M4/364 Primary

  as mixtures · CPC title