ACTIVE MATERIAL

• US 20140120380A1
• Filed: 10/25/2013
• Published: 05/01/2014
• Est. Priority Date: 10/30/2012
• Status: Abandoned Application

• Current Assignee: Kabushiki Kaisha Toshiba (Toshiba Corporation)
• Original Assignee: Kabushiki Kaisha Toshiba (Toshiba Corporation)
• Inventors: Inagaki, Hiroki, Zhang, Wen, Harada, Yasuhiro, Takami, Norio
• Application Number:
  US14/063,436
• Publication Number:
  US 20140120380A1
• Time in Patent Office: Days
• US Class Current: 429/7
• CPC Class Codes: C01G 23/005 Alkali titanates
• CPC Class Codes: C01G 33/00 Compounds of niobium
• CPC Class Codes: C01G 33/006 Compounds containing, besides niobium, two or more other elements, with the exception of oxygen or hydrogen
• CPC Class Codes: C01G 45/00 Compounds of manganese
• CPC Class Codes: C01G 49/0018 Mixed oxides or hydroxides, C01G49/0009 takes precedence
• CPC Class Codes: C01G 49/0072 containing manganese
• CPC Class Codes: C01P 2002/32 spinel-type (AB2O4)
• CPC Class Codes: C01P 2004/61 Micrometer sized, i.e. from 1-100 micrometer
• CPC Class Codes: C01P 2006/12 Surface area
• CPC Class Codes: C01P 2006/40 Electric properties
• CPC Class Codes: H01M 10/425 Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing printed circuits H05K1/00
• CPC Class Codes: H01M 10/48 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 Class Codes: H01M 10/486 for measuring temperature
• CPC Class Codes: H01M 4/131 Electrodes based on mixed oxides or hydroxides, or on mixtures of oxides or hydroxides, e.g. LiCoOx
• CPC Class Codes: H01M 4/485 of mixed oxides or hydroxides for inserting or intercalating light metals, e.g. LiTi2O4 or LiTi2OxFy H01M4/505, H01M4/525 take precedence
• CPC Class Codes: H01M 4/505 of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy
• CPC Class Codes: H01M 4/525 of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy
• CPC Class Codes: Y02E 60/10 Energy storage using batteries

Abstract

According to one embodiment, an active material is provided. The active material includes orthorhombic system oxide represented by the following formula: Li_xM1M2₂O₆. 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.

Claims

1. An active material comprising an orthorhombic system oxide represented by the following formula:

Li_xM1M2₂O₆

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 active material according to claim 1, wherein the orthorhombic system oxide is represented by the formula Li_xFeNb₂O₆, the formula Li_xFeV₂O₆, the formula Li_xFe_0.5Mn_0.5Nb₂O₆, the formula Li_xMnNb₂O₆, or the formula Li_xMnTa₂O₆.

3. The active material according to claim 1, wherein the orthorhombic system oxide is represented by the formula Li_xFeNb₂O₆ or the formula Li_xFeV₂O₆.

4. The active material according to claim 1, wherein the orthorhombic system oxide has a BET specific surface area of 1 m²/g or more but 50 m²/g or less.

5. A nonaqueous electrolyte battery, comprising:

a negative electrode comprising the active material according to claim 1;

a positive electrode; and

a nonaqueous electrolyte.

6. The nonaqueous electrolyte battery to claim 5, wherein the negative electrode further comprising niobium titanium composite oxide comprising monoclinic-system oxide.

7. The nonaqueous electrolyte battery to claim 6, wherein the niobium titanium composite oxide is selected from the group consisting of Li_xNb₂TiO₇, Li_xNb₁₀Ti₂O₂₉, Li_xNb₁₄TiO₃₇, and Li_xNb₂₄TiO₆₂.

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

9. The battery pack according to claim 8, comprising a plurality of the nonaqueous electrolyte battery.

10. The battery pack according to claim 9, wherein the plurality of the nonaqueous electrolyte battery are electrically connected to each other in series, in parallel or in the combination thereof.

11. The battery pack according to claim 8, further comprising:

a protective circuit configured to detect the voltage of the nonaqueous electrolyte battery.