Positive electrode material for lithium secondary battery and lithium secondary battery including same

Patent metadata

Field	Value
Publication number	US-11962001-B2
Application number	US-202117495314-A
Country	US
Kind code	B2
Filing date	Oct 6, 2021
Priority date	Mar 24, 2021
Publication date	Apr 16, 2024
Grant date	Apr 16, 2024

Abstract

Disclosed is a positive electrode material for a lithium secondary battery. The positive electrode material includes a positive electrode active material formed of Li—[Mn—Ti]-M-O-based material including a transition metal (M) to enable reversible intercalation and deintercalation of lithium and molybdenum oxide. The positive electrode active material is coated with the molybdenum oxide to form a coating layer on a surface thereof.

First claim

What is claimed is:

1. A positive electrode material for a lithium secondary battery, consisting of:
a positive electrode active material formed of Li—[Mn—Ti]-M-O-based material comprising a transition metal (M) to enable reversible intercalation and deintercalation of lithium, and
a coating layer comprising molybdenum oxide is formed on the positive electrode active material,
wherein the positive electrode active material comprises Li 1.25 +y[Mn 0.45 Ti 0.35 ] 0.975 M 0.025 O 2 and the coating layer comprises Li x MoO z , wherein x, y, and z are satisfying numerical ranges of 0≤x≤6, −0.02≤y≤0.02, and 2≤z≤4,
wherein the transition metal (M) is selected from the group consisting of W, Cr, Al, Ni, Co, V, and Zn.

2. The positive electrode material of claim 1 , wherein a weight of the coating layer is about 0.1 wt % to 20 wt % based on a weight of the positive electrode active material.

3. The positive electrode material of claim 1 , wherein a weight of the coating layer is about 1 wt % to 10 wt % based on a weight of the positive electrode active material.

4. A lithium secondary battery comprising:
a positive electrode comprising the positive electrode material consisting of the positive electrode active material and the coating layer of claim 1 ;
a negative electrode comprising a negative electrode active material;
a separator interposed between the positive electrode and the negative electrode; and
an electrolyte.

5. A vehicle comprising a battery of claim 4 .

Assignees

• Hyundai Motor Co Ltd
• Kia Corp
• Univ Sejong Ind Acad Coop Foud

Inventors

• Oh Seung Min
• Rhee Jun Ki
• Lee Yoon Sung
• Lee Ji Eun
• Ban Sung Ho
• Kim Ko Eun
• Jin Woo Young
• Park Sang Mok
• Lee Sang Hun
• Myung Seung Taek
• Kim Hee Jae
• Shin Min Young

Classifications

• H01M4/366 Primary

  as layered products · CPC title

• H01M4/505 Primary

  of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy · CPC title

• H01M4/62

  Selection of inactive substances as ingredients for active masses, e.g. binders, fillers · CPC title

• H01M10/0525

  Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries · CPC title

• H01M2004/028

  Positive electrodes · CPC title