Nonaqueous electrolyte battery, battery pack, and vehicle

Patent metadata

Field	Value
Publication number	US-2017271661-A1
Application number	US-201615392641-A
Country	US
Kind code	A1
Filing date	Dec 28, 2016
Priority date	Mar 15, 2016
Publication date	Sep 21, 2017
Grant date	—

Abstract

According to one embodiment, a nonaqueous electrolyte battery is provided. This nonaqueous electrolyte battery includes a negative electrode. The negative electrode includes a negative electrode active material including a titanium oxide, and has a coating that coats at least a portion of a surface of the negative electrode. The coating includes fluorine atoms, organic atoms and metal atoms.

First claim

1 . A nonaqueous electrolyte battery comprising a positive electrode, a negative electrode, and a nonaqueous electrolyte,
wherein the negative electrode comprises a negative electrode active material comprising a titanium oxide, and the negative electrode comprises a coating that coats at least a portion of a surface of the negative electrode, and the coating comprises fluorine atoms, organic atoms and metal atoms, and the coating satisfies the following formula (1):
0.2≦ F 1/ F 2≦0.8  (1)

where F1 represents a proportion (%) of an integrated intensity of a peak F1 derived from an amount of the fluorine atoms bonded to the organic atoms according to X-ray photoelectron spectroscopy to an integrated intensity of a peak F1S derived from a whole amount of the fluorine atoms according to the X-ray photoelectron spectroscopy, and F2 represents a proportion (%) of an integrated intensity of a peak F2 derived from an amount of the fluorine atoms bonded to the metal atoms according to the X-ray photoelectron spectroscopy to the integrated intensity of the peak F1S.

2 . The nonaqueous electrolyte battery according to claim 1 ,
wherein the coating comprises oxygen atoms bonded to the organic atoms, and satisfies the following formula (2):
1≦ O 1 A/O 1 B   (2)

where O1A represents a proportion (%) of an integrated intensity of a peak O1A at 532±0.5 eV in the X-ray photoelectron spectroscopy to an integrated intensity of a peak O1 derived from a whole amount of the oxygen atoms bonded to the organic atoms according to the X-ray photoelectron spectroscopy, and O1B represents a proportion (%) of an integrated intensity of a peak O1B at 533±0.5 eV in the X-ray photoelectron spectroscopy to the integrated intensity of the peak O1.

3 . The nonaqueous electrolyte battery according to claim 2 , wherein the coating further comprises oxygen atoms bonded to the metal atoms, and satisfies the following formula (3):
3.5≦ O 1/ O 2  (3)
where O1 represents a proportion (%) of an integrated intensity of a peak O1 derived from an amount of the oxygen atoms bonded to the organic atoms according to the X-ray photoelectron spectroscopy to an integrated intensity of a peak O1S derived from an whole amount of oxygen atoms according to the X-ray photoelectron spectroscopy, and O2 represents a proportion (%) of an integrated intensity of a peak O2 derived from an amount of the oxygen atoms bonded to the metal atoms according to the X-ray photoelectron spectroscopy to the integrated intensity of the peak O1S.

4 . The nonaqueous electrolyte battery according to claim 1 , wherein the ratio F1/F2 falls within a range of 0.5 to 0.78.

5 . The nonaqueous electrolyte battery according to claim 2 , wherein the ratio O1A/O1B falls within a range of 1.05 to 1.2.

6 . The nonaqueous electrolyte battery according to claim 3 , wherein the ratio O1/O2 falls within a range of 3.5 to 5.8.

7 . The nonaqueous electrolyte battery according to claim 1 , wherein the negative electrode active material has a BET specific surface area within a range of 5 m 2 /g to 100 m 2 /g.

8 . The nonaqueous electrolyte battery according to claim 1 , wherein the positive electrode comprises a positive electrode active material represented by Li x Fe 1−y Mn y PO 4 (where 0<x≦1, 0≦y≦1).

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

10 . The battery pack according to claim 9 , further comprising:
an external power distribution terminal; and a protective circuit.

11 . The battery pack according to claim 9 , wherein
the battery pack comprises a plural of nonaqueous electrolyte batteries, and the nonaqueous electrolyte batteries are electrically connected in series, in parallel, or in combination of in series and in parallel.

12 . A vehicle comprising the battery pack according to claim 9 .

13 . The vehicle according to claim 12 , wherein the battery pack is configured to recover a regenerative energy of a power of the vehicle.

Assignees

• Toshiba Kk

Inventors

• Yasuda Kazuhiro
• Yamashita Yasunobu
• Hoshina Keigo
• Isozaki Yoshiyuki
• Takami Norio

Classifications

• 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

• H01M10/0525

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

• H01M4/628

  Inhibitors, e.g. gassing inhibitors, corrosion inhibitors · CPC title

• H01M10/425

  Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing (printed circuits H05K1/00) · CPC title

• H01M4/131

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