Nonaqueous electrolyte battery and battery pack

Patent metadata

Field	Value
Publication number	US-2016268604-A1
Application number	US-201615053437-A
Country	US
Kind code	A1
Filing date	Feb 25, 2016
Priority date	Mar 12, 2015
Publication date	Sep 15, 2016
Grant date	—

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 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 [cm 2 ] 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≦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 .

Assignees

• Toshiba Kk

Inventors

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

Classifications

• H01M4/505 Primary

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

• H01M2004/027

  Negative electrodes · CPC title

• C01P2004/61

  Micrometer sized, i.e. from 1-100 micrometer · CPC title

• C01P2004/82

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

• H01M10/0525

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