Electrode, nonaqueous electrolyte battery, battery pack and vehicle

Patent metadata

Field	Value
Publication number	US-2018277828-A1
Application number	US-201715701525-A
Country	US
Kind code	A1
Filing date	Sep 12, 2017
Priority date	Mar 22, 2017
Publication date	Sep 27, 2018
Grant date	—

Abstract

According to one embodiment, an electrode is provided. The electrode includes an active material-containing layer. The active material-containing layer includes an Na-containing niobium-titanium composite oxide having an orthorhombic crystal structure. The active material-containing layer satisfies I 2 /I 1 ≥1. I 1 is an intensity of a peak P 1 appearing in a binding energy range of 289 eV to 292 eV in an X-ray photoelectron spectroscopy spectrum of the active material-containing layer. I 2 is an intensity of a peak P 2 appearing in a binding energy range of 283 eV to 285 eV in the X-ray photoelectron spectroscopy spectrum of the active material-containing layer.

First claim

What is claimed is:

1 . An electrode comprising:
an active material-containing layer comprising an Na-containing niobium-titanium composite oxide having an orthorhombic crystal structure, wherein the active material-containing layer satisfies I 2 /I 1 ≥1, where I 1 is an intensity of a peak P 1 appearing in a binding energy range of 289 eV to 292 eV in an X-ray photoelectron spectroscopy spectrum of the active material-containing layer, and I 2 is an intensity of a peak P 2 appearing in a binding energy range of 283 eV to 285 eV in the X-ray photoelectron spectroscopy spectrum.

2 . The electrode according to claim 1 , wherein the Na-containing niobium-titanium composite oxide is represented by a general formula of Li 2+v Na 2-w M1 x Ti 6-y-z Nb y M2 z O 14+δ ,
in the general formula; 0≤v≤4, 0<w<2, 0≤x<2, 0<y<2, 0≤z<3, and −0.5≤δ≤0.5; the M1 is at least one metal element selected from the group consisting of Cs, K, Mg, Sr, Ba and Ca; and the M2 is at least one metal element selected from the group consisting of Zr, Sn, V, Ta, Mo, W, Fe, Co, Mn and Al.

3 . The electrode according to claim 1 , wherein the active material-containing layer satisfies 1≤I 2 /I 1 ≤5.

4 . The electrode according to claim 1 , wherein the active material-containing layer satisfies 1≤I 2 /I 1 ≤3.

5 . A nonaqueous electrolyte battery comprising:
a negative electrode comprising the electrode according to claim 1 ; a positive electrode; and a nonaqueous electrolyte.

6 . The nonaqueous electrolyte battery according to claim 5 , wherein the Na-containing niobium-titanium composite oxide is represented by a general formula of Li 2+v Na 2-w M1 x Ti 6-y-z Nb y M2 z O 14+δ ,
in the general formula; 0≤v≤4, 0<w<2, 0≤x<2, 0<y<2, 0≤z<3, and −0.5≤5≤0.5; the M1 is at least one metal element selected from the group consisting of Cs, K, Mg, Sr, Ba and Ca; and the M2 is at least one metal element selected from the group consisting of Zr, Sn, V, Ta, Mo, W, Fe, Co, Mn and Al.

7 . The nonaqueous electrolyte battery according to claim 5 , wherein the active material-containing layer satisfies 1≤I 2 /I 1 ≤5.

8 . The nonaqueous electrolyte battery according to claim 5 , wherein the active material-containing layer satisfies 1≤I 2 /I 1 ≤3.

9 . The nonaqueous electrolyte battery according to claim 5 , wherein the nonaqueous electrolyte comprises ethylene carbonate.

10 . A battery pack comprising the nonaqueous electrolyte battery according to claim 5 .

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

12 . The battery pack according to claim 10 comprising a plural of nonaqueous electrolyte batteries, the plural of the nonaqueous electrolyte batteries being electrically connected in series, in parallel, or in combination of in series and in parallel.

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

14 . The vehicle according to claim 13 , which comprises a mechanism configured to convert kinetic energy of the vehicle into regenerative energy.

Assignees

• Toshiba Kk

Inventors

• Namiki Yusuke
• Hoshina Keigo
• Harada Yasuhiro
• Takami Norio

Classifications

• H01M2220/20

  Batteries in motive systems, e.g. vehicle, ship, plane · CPC title

• H01M10/05

  Accumulators with non-aqueous electrolyte (H01M10/39 takes precedence) · CPC title

• C01G33/006

  Compounds containing niobium, with or without oxygen or hydrogen, and containing two or more other elements · CPC title

• H01M4/48

  of inorganic oxides or hydroxides · CPC title

• H01M10/0525

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