Electrode, non-aqueous electrolyte battery, battery pack, and vehicle

Patent metadata

Field	Value
Publication number	US-11563204-B2
Application number	US-201916668417-A
Country	US
Kind code	B2
Filing date	Oct 30, 2019
Priority date	Mar 18, 2019
Publication date	Jan 24, 2023
Grant date	Jan 24, 2023

Abstract

According to one embodiment, an electrode includes a current collector and an active material layer. The active material layer is disposed on at least one of faces of the current collector. The active material layer comprises active materials which include at least a cobalt-containing oxide and a lithium nickel manganese oxide. A ratio of a weight of the cobalt-containing oxide to a total of weights of the cobalt-containing oxide and the lithium nickel manganese oxide is 5 wt % or more and 40 wt % or less.

First claim

What is claimed is:

1. An electrode comprising:
a current collector; and
an active material layer disposed on at least one the of the current collector,
wherein
the active material layer comprises active materials which include at least a first oxide and a second oxide,
the first oxide is a cobalt-containing oxide and the second oxide is a lithium nickel manganese oxide,
a ratio of a weight of the cobalt-containing oxide to a total of weights of the cobalt-containing oxide and the lithium nickel manganese oxide is 5 wt % or more and 40 wt % or less, and
the lithium nickel manganese oxide has a spinel structure,
wherein a ratio of an average particle size of the lithium nickel manganese oxide d50 Ni—Mn) to an average particle size of the cobalt-containing oxide d50(Co) is 10≤d50(Ni—Mn)/d50(Co)≤200.

2. The electrode according to claim 1 , wherein
the cobalt-containing oxide has a crystallite diameter of 1 nm or more and 100 nm less, and
the crystallite diameter is calculated from a half width of a main peak observed by X-ray diffraction measurement.

3. The electrode according to claim 1 , wherein
the ratio is 10 wt % or more and 20 wt % or less.

4. The electrode according to claim 1 , wherein
the lithium nickel manganese oxide has an average particle size of 1 μm or more and 20 μm or less.

5. The electrode according to claim 1 , wherein
the cobalt-containing oxide has an average particle size of 10 nm or more and 2 μm or less.

6. The electrode according to claim 1 , wherein
the cobalt-containing oxide contains at least one of LiM x Co 1−x PO 4 , Li 2 M x Co 1−x PO 4 F, LiM x Co 1−x O 2 , LiM x Co 1−x BO 3 , and LiM x Co 1−x SiO 4 where 0≤x≤0.8, and M includes at least one selected from the group consisting Mn, Ni, Fe, Mg, Zn and Al.

7. A non-aqueous electrolyte battery comprising:
a positive electrode;
a negative electrode which includes a titanium-containing oxide; and
a non-aqueous electrolyte,
wherein the positive electrode is the electrode according to claim 1 .

8. The non-aqueous electrolyte battery according claim 7 , wherein
the titanium-containing oxide contains at least one of
a spinel lithium titanate Li 4+x Ti 5 O 12 where −1≤x≤3,
a monoclinic β-type titanium composite oxide Li x TiO 2 , (where 0≤x),
a niobium titanium oxide Ti 1−x M1 x Nb 2−y ,M2 y O 7−δ where 0≤x<1, 0≤y<1, M1 and M2 contain at least one selected from the group consisting of Mg, Fe, Ni, Co, W, Ta and Mo, and M1 and M2 may be the same or different, and
an orthorhombic Na-containing niobium titanium composite oxide Li 2+v Na 2−w M1 x Ti 6−y−z Nb y M2 z O 14+δ where M1 includes at least one selected from the group consisting of Cs, K, Sr, Ba and Ca, M2 includes at least one selected from the group consisting of Zr, Sn, V, Ta, Mo, W, Fe, Co, Mn and Al, 0≤v≤4,0<w<2,0≤x<2,0<y≤6,0≤z<3, −05≤δ≤0.5.

9. The non-aqueous electrolyte battery according to claim 7 , wherein
the non-aqueous electrolyte is a liquid non-aqueous electrolyte.

10. A battery pack comprising:
the non-aqueous electrolyte battery according to claim 7 .

11. The battery pack according to claim 10 , further comprising:
a current-carrying external terminal; and
a protection circuit.

12. The battery pack according to claim 10 , further comprising:
a plurality of non-aqueous electrolyte batteries which are the non-aqueous electrolyte battery respectively,
wherein the non-aqueous electrolyte batteries are electrically connected in series or in parallel, or in series and parallel.

13. A vehicle comprising the battery pack according to claim 10 .

14. The vehicle according to claim 13 , wherein
the battery pack recovers a regenerative energy from a power of the vehicle.

Assignees

• Toshiba Kk

Inventors

• Yamashita Yasunobu
• Matsuno Shinsuke
• Takami Norio
• Inagaki Hiroki

Classifications

• H01M4/1391

  of electrodes based on mixed oxides or hydroxides, or on mixtures of oxides or hydroxides, e.g. LiCoOx · CPC title

• H01M4/131 Primary

  Electrodes based on mixed oxides or hydroxides, or on mixtures of oxides or hydroxides, e.g. LiCoOx · CPC title

• H01M4/485

  of mixed oxides or hydroxides for inserting or intercalating light metals, e.g. LiTi2O4 or LiTi2OxFy (H01M4/505, H01M4/525 take precedence) · CPC title

• H01M4/0404

  by coating on electrode collectors · CPC title

• H01M10/0569

  characterised by the solvents · CPC title