Active material

Patent metadata

Field	Value
Publication number	US-9698422-B2
Application number	US-201615348011-A
Country	US
Kind code	B2
Filing date	Nov 10, 2016
Priority date	Oct 30, 2012
Publication date	Jul 4, 2017
Grant date	Jul 4, 2017

Abstract

According to one embodiment, an active material is provided. The active material includes orthorhombic system oxide represented by the following formula: Li x M1M2 2 O 6 . In this formula, 0≦x≦5, M1 is at least one selected from the group consisting of Fe and Mn, and M2 is at least one selected from the group consisting of Nb, Ta and V.

First claim

What is claimed is:

1. A nonaqueous electrolyte battery, comprising:
a negative electrode comprising a negative electrode active material;
a positive electrode; and
a nonaqueous electrolyte,
wherein the negative electrode active material comprises:
a niobium titanium composite oxide comprising monoclinic-system oxide, and
an orthorhombic system oxide represented by the following formula:
Li x M1M2 2 O 6

wherein 0≦x≦5, M1 is at least one selected from the group consisting of Fe and Mn, and M2 is at least one selected from the group consisting of Nb, Ta and V.

2. The nonaqueous electrolyte battery according to claim 1 , wherein the niobium titanium composite oxide is selected from the group consisting of Li x Nb 2 TiO 7 , Li x Nb 10 Ti 2 O 29 , Li x Nb 14 TiO 37 , and Li x Nb 24 TiO 62 .

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

4. The battery pack according to claim 3 , comprising a plurality of the nonaqueous electrolyte batteries.

5. The battery pack according to claim 4 , wherein the plurality of the nonaqueous electrolyte batteries are electrically connected to each other in series, in parallel or in the combination thereof.

6. The battery pack according to claim 3 , further comprising:
a protective circuit configured to detect a voltage of the nonaqueous electrolyte battery.

7. The nonaqueous electrolyte battery according to claim 1 , wherein the orthorhombic system oxide is represented by the formula Li x FeNb 2 O 6 , where 0≦x≦5, or the formula Li x FeV 2 O 6 , where 0≦x≦5.

8. The nonaqueous electrolyte battery according to claim 1 , wherein the orthorhombic system oxide has a BET specific surface area of 1 m 2 /g or more and 50 m 2 /g or less.

9. The nonaqueous electrolyte battery according to claim 1 , wherein the positive electrode comprises a positive electrode active material, and
the positive electrode active material comprises at least one selected from the group consisting of a manganese dioxide, an iron oxide, a copper oxide, a nickel oxide, a lithium manganese composite oxide, a lithium nickel composite oxide, a lithium cobalt composite oxide, a lithium nickel cobalt composite oxide, a lithium manganese cobalt composite oxide, a lithium-manganese-nickel composite oxide having a spinel structure, a lithium phosphorus oxide having an olivine structure, an iron sulfate, a vanadium oxide, and a lithium nickel cobalt manganese composite oxide.

10. The nonaqueous electrolyte battery according to claim 9 , wherein a primary particle diameter of the positive electrode active material is 100 nm or more and 1 μm or less.

11. The nonaqueous electrolyte battery according to claim 9 , wherein a specific surface area of the positive electrode active material is 0.1 m 2 /g or more and 10 m 2 /g or less.

Assignees

• Toshiba Kk

Inventors

• Inagaki Hiroki
• Zhang Wen
• Harada Yasuhiro
• Takami Norio

Classifications

• H01M10/486

  for measuring temperature · CPC title

• H01M10/48

  Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte (constructional details of current conducting connections for detecting conditions inside cells or batteries, e.g. details of voltage sensing terminals, H01M50/569) · CPC title

• C01G49/0018

  Mixed oxides or hydroxides, (C01G49/0009 takes precedence) · CPC title

• C01P2006/40

  Electric properties · CPC title

• H01M4/505

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