Nonaqueous electrolyte battery and battery pack

Patent metadata

Field	Value
Publication number	US-9979020-B2
Application number	US-201615053437-A
Country	US
Kind code	B2
Filing date	Feb 25, 2016
Priority date	Mar 12, 2015
Publication date	May 22, 2018
Grant date	May 22, 2018

Abstract

According to one embodiment, a nonaqueous electrolyte battery including a positive electrode, a negative electrode, and a nonaqueous electrolyte is provided. The positive electrode includes an active material including Li 1−x Mn 2−y−z Al y M z O 4 (−0.1≤x≤1, 0.20≤y≤0.35, 0≤z≤0.1, M is at least one metal selected from Mg, Ca, Ti, V, Cr, Fe, Co, Ni, Cu, Zn, Zr, Nb, Mo, and Sn). The negative electrode includes an active material including a first oxide represented by Li 4+a Ti 5 O 12 (−0.5≤a≤3) and a second oxide of at least one element selected from Al, Co, Cr, Cu, Fe, Mg, Ni, Zn, and Zr. The second oxide is included in an amount of from 300 ppm to 5000 ppm relative to a weight of the first oxide.

First claim

What is claimed is:

1. A nonaqueous electrolyte battery comprising:
a positive electrode comprising an active material comprising Li 1−x Mn 2−y−z Al y M z O 4 (−0.1≤x≤1, 0.20≤y≤0.35, 0≤z≤0.1, M is at least one metal selected from the group consisting of Mg, Ca, Ti, V, Cr, Fe, Co, Ni, Cu, Zn, Zr, Nb, Mo, and Sn);
a negative electrode comprising an active material comprising a mixture, the mixture comprising a first oxide represented by Li 4+a Ti 5 O 12 (−0.5≤a≤3), and a second oxide of at least one element selected from the group consisting of Al, Co, Cr, Cu, Fe, Mg, Ni, Zn, and Zr in an amount of from 300 ppm to 5000 ppm relative to a weight of the first oxide; and
a nonaqueous electrolyte.

2. The nonaqueous electrolyte battery according to claim 1 , which satisfies the following formula (1):
800≤( CA/A )≤4000  (1)

where A is a rated capacity [Ah] of the nonaqueous electrolyte battery, and CA is an area [cm2] of the positive electrode.

3. The nonaqueous electrolyte battery according to claim 2 , wherein the active material of the positive electrode comprises Li 1−x Co 1−b M′ b O 2 wherein 0.1≤x≤1, 0≤b≤0.3, M′ is at least one metal selected from the group consisting of Al, Mg, Ca, Ti V, Cr, Mn, Fe, Co, Ni, Cu, Zn, Zr, Nb, Mo, and Sn.

4. A battery pack comprising the nonaqueous electrolyte battery according to claim 1 .

5. The nonaqueous electrolyte battery according to claim 1 , wherein the mixture comprises first particles of the first oxide and second particles of the second oxide.

Assignees

• Toshiba Kk

Inventors

• Saruwatari Hidesato
• Yoshikawa Hikaru
• Kuriyama Hiromichi
• Murashi Yasuaki
• Nishio Naoki
• Yamamoto Dai

Classifications

• 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

• H01M4/505 Primary

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

• C01G51/42

  containing alkali metals, e.g. LiCoO2 · CPC title

• H01M4/131

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

• C01P2004/82

  two phases having the same anion, e.g. both oxidic phases · CPC title