Positive electrode material and battery using same

Patent metadata

Field	Value
Publication number	US-11637287-B2
Application number	US-202016930430-A
Country	US
Kind code	B2
Filing date	Jul 16, 2020
Priority date	Jan 26, 2018
Publication date	Apr 25, 2023
Grant date	Apr 25, 2023

Abstract

Provided is a positive electrode material which further improves charge/discharge efficiency. The positive electrode material according to the present disclosure includes a positive electrode active material and a first solid electrolyte material. The first solid electrolyte material includes Li, M, and X, and does not include sulfur. M is at least one selected from the group consisting of metalloid elements and metal elements other than Li. X is at least one selected from the group consisting of Cl, Br, and I. The positive electrode active material includes a metal oxyfluoride.

First claim

The invention claimed is:

1. A positive electrode material, comprising:
a positive electrode active material particle and a first solid electrolyte material particle,
wherein the positive electrode active material particle and the first solid electrolyte material particle are in contact with each other,
the first solid electrolyte material particle is represented by the following composition formula:
Li a M b Y c X 6 ,

M is at least one selected from the group consisting of Mg, Ca, Sr, Ba, Zn, Sc, Al, Ga, Bi, Zr, Hf, Ti, Sn, Ta, and Nb,
X is at least one selected from the group consisting of Cl, Br, and I,
a+m′b+3c=6, a>0 and c>0 are satisfied,
m′ represents a valence of M, and
the positive electrode active material particle includes a metal oxyfluoride represented by the following composition formula:
Li p Me q O m F n ,

where
Me is at least one selected from the group consisting of Mn, Co, Ni, Fe, Al, Cu, V, Nb, Mo, Ti, Cr, Zr, Zn, Na, K, Ca, Mg, Pt, Au, Ag, Ru, W, B, Si, and P,
n′ represents a valence of Me,
0.5≤ p≤ 1.5,

0.5≤ q≤ 1.0

1≤ m< 2;

p+n′q= 2 m+n , and
0< n≤ 1.

2. The positive electrode material according to claim 1 , wherein the first solid electrolyte material particle is represented by at least one selected from the group consisting of Li 3 YCl 6 , Li 3 YBr 6 , Li 2.5 Y 0.5 Zr 0.5 Cl 6 , and Li 3 YBr 2 Cl 2 I 2 .

3. The positive electrode material according to claim 1 , wherein the metal oxyfluoride has a composition of Li 1.05 (Ni 0.35 Co 0.35 Mn 0.3 ) 0.95 O 1.9 F 0.1 .

4. A battery comprising:
a positive electrode comprising the positive electrode material according to claim 1 ;
a negative electrode; and
an electrolyte layer provided between the positive electrode and the negative electrode, wherein the electrolyte layer includes at least one of the first solid electrolyte material particle, an oxide solid electrolyte, a polymer solid electrolyte, a sulfide solid electrolyte, and a complex hydride solid electrolyte.

5. The battery according to claim 4 , wherein
the electrolyte layer includes the first solid electrolyte material particle.

6. The positive electrode material according to claim 1 , wherein
M is Zr.

7. The positive electrode material according to claim 1 , wherein
the first solid electrolyte material particle is represented by the following composition formula:
Li 6-3c Y c X 6 or Li 2.5 Y 0.5 Zr 0.5 Cl 6 , and
0< c< 2 is satisfied.

Assignees

• Panasonic Ip Man Co Ltd

Inventors

• Sugimoto Yuta
• Natsui Ryuichi
• Sasaki Izuru
• Miyazaki Akinobu

Classifications

• H01M2300/0068

  inorganic · CPC title

• H01M4/62 Primary

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

• C01G53/50

  of the type (MnO2)n-, e.g. Li(NixMn1-x)O2 or Li(MyNixMn1-x-y)O2 · CPC title

• H01M10/052

  Li-accumulators · CPC title

• H01M4/525

  of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy · CPC title