Nonaqueous electrolytic solution secondary battery, and positive electrode and negative electrode used in the same

Patent metadata

Field	Value
Publication number	US-9312534-B2
Application number	US-201113991355-A
Country	US
Kind code	B2
Filing date	Dec 9, 2011
Priority date	Dec 9, 2010
Publication date	Apr 12, 2016
Grant date	Apr 12, 2016

Abstract

Provided is a nonaqueous electrolytic solution secondary battery having a high energy density, and a positive electrode and a negative electrode used therefor. The nonaqueous electrolytic solution secondary battery includes a positive electrode and a negative electrode, wherein: the negative electrode contains a negative electrode active material having an initial charge/discharge efficiency of 75% or less when charged and discharged by employing metallic Li as a counter electrode; and the positive electrode contains a metal oxide (X) represented by A x MeO y (wherein A is Na and/or K, Me is Ni and/or Cu, x satisfies 1.9≦x≦2.1, and y satisfies 1.9≦y≦2.1).

First claim

The invention claimed is:

1. A nonaqueous electrolytic solution secondary battery comprising a positive electrode and a negative electrode,
wherein the negative electrode contains a negative electrode active material having an initial charge/discharge efficiency of 75% or less when charged and discharged by employing metallic Li as a counter electrode,
the positive electrode contains at least one metal oxide (X) represented by A x MeO y , wherein A is at least one or two species selected from Na and K, Me is at least one or two species selected from Ni and Cu, x satisfies 1.9≦x≦2.1, and y satisfies 1.9≦y≦2.1,
the metal oxide (X) comprises Na 2 NiO 2 ,
the positive electrode includes a positive electrode active material (Z), and a content of the metal oxide (X) in the positive electrode is 2 to 20 wt % with respect to the total weight of the positive electrode active material (Z) and the metal oxide (X), and
the negative electrode includes a metal oxide (a) capable of absorbing and emitting lithium ions as the negative electrode active material.

2. The nonaqueous electrolytic solution secondary battery of claim 1 , wherein the negative electrode includes a carbon material (c) as the negative electrode active material.

3. The nonaqueous electrolytic solution secondary battery of claim 1 , wherein the metal oxide (a) is a silicon oxide.

4. The nonaqueous electrolytic solution secondary battery of claim 1 , wherein the negative electrode includes a metal (b) capable of forming an alloy with lithium as the negative electrode active material.

5. The nonaqueous electrolytic solution secondary battery of claim 4 , wherein the metal (b) is silicon.

6. The nonaqueous electrolytic solution secondary battery of claim 1 , wherein the content of the metal oxide (X) in the positive electrode is 2 to 10 wt % with respect to the total weight of the positive electrode active material (Z) and the metal oxide (X).

7. The nonaqueous electrolytic solution secondary battery of claim 1 , wherein the metal oxide (X) further comprises K 2 NiO 2 .

8. The nonaqueous electrolytic solution secondary battery of claim 7 , wherein the content of the metal oxide (X) in the positive electrode is 2 to 10 wt % with respect to the total weight of the positive electrode active material (Z) and the metal oxide (X).

9. The nonaqueous electrolytic solution secondary battery of claim 1 , wherein the metal oxide (X) further comprises K 2 CuO 2 .

10. The nonaqueous electrolytic solution secondary battery of claim 9 , wherein the content of the metal oxide (X) in the positive electrode is 2 to 10 wt % with respect to the total weight of the positive electrode active material (Z) and the metal oxide (X).

11. A positive electrode used for a nonaqueous electrolytic solution secondary battery,
wherein the positive electrode contains a metal oxide (X) represented by A x MeO y wherein A is at least one or two species selected from Na and K, Me is at least one or two species selected from Ni and Cu, x satisfies 1.9≦x≦2.1, and y satisfies 1.9≦y≦2.1,
the metal oxide (X) comprises Na 2 NiO 2 , and
the positive electrode includes a positive electrode active material (Z), and a content of the metal oxide (X) in the positive electrode is 2 to 20 wt % with respect to the total weight of the positive electrode active material (Z) and the metal oxide (X).

12. The positive electrode used for a nonaqueous electrolytic solution secondary battery of claim 11 , wherein the content of the metal oxide (X) in the positive electrode is 2 to 10 wt % with respect to the total weight of the positive electrode active material (Z) and the metal oxide (X).

13. The positive electrode used for a nonaqueous electrolytic solution secondary battery of claim 11 , wherein the metal oxide (X) further comprises K 2 NiO 2 .

14. The positive electrode used for a nonaqueous electrolytic solution secondary battery of claim 13 , wherein the content of the metal oxide (X) in the positive electrode is 2 to 10 wt % with respect to the total weight of the positive electrode active material (Z) and the metal oxide (X).

15. The positive electrode used for a nonaqueous electrolytic solution secondary battery of claim 11 , wherein the metal oxide (X) further comprises K 2 CuO 2 .

16. The positive electrode used for a nonaqueous electrolytic solution secondary battery of claim 15 , wherein the content of the metal oxide (X) in the positive electrode is 2 to 10 wt % with respect to the total weight of the positive electrode active material (Z) and the metal oxide (X).

17. A negative electrode used for a nonaqueous electrolytic solution secondary battery,
wherein the negative electrode contains a negative electrode active material having an initial charge/discharge efficiency of 75% or less when charged and discharged by employing metallic Li as a counter electrode, the negative electrode being obtained by charging with a positive electrode containing a metal oxide (X) represented by A x MeO y wherein A is at least one or two species selected from Na and K, Me is at least one or two species selected from Ni and Cu, x satisfies 1.9≦x≦2.1, and y satisfies 1.9≦y≦2.1 as a counter electrode,
the metal oxide (X) comprises Na 2 NiO 2 ,
the positive electrode includes a positive electrode active material (Z), and a content of the metal oxide (X) in the positive electrode is 2 to 20 wt % with respect to the total weight of the positive electrode active material (Z) and the metal oxide (X), and
the negative electrode includes a metal oxide (a) capable of absorbing and emitting lithium ions as the negative electrode active material.

18. The negative electrode used for a nonaqueous electrolytic solution secondary battery of claim 17 , wherein the negative electrode includes a carbon material (c) as the negative electrode active material.

19. The negative electrode used for a nonaqueous electrolytic solution secondary battery of claim 17 , wherein the metal oxide (a) is a silicon oxide.

20. The negative electrode used for a nonaqueous electrolytic solution secondary battery of claim 17 , wherein the negative electrode includes a metal (b) capable of forming an alloy with lithium as the negative electrode active material.

21. The negative electrode used for a nonaqueous electrolytic solution secondary battery of claim 20 , wherein the metal (b) is silicon.

22. A nonaqueous electrolytic solution secondary battery comprising a positive electrode and a negative electrode,
wherein the negative electrode contains a negative electrode active material having an initial charge/discharge efficiency of 75% or less when charged and discharged by employing metallic Li as a counter electrode,
the positive electrode contains a metal oxide (X) represented by A x MeO y , wherein A is at least one or two species selected from Na and K, Me is at least one or two species selected from Ni and Cu, x satisfies 1.9≦x≦2.1, and y satisfies 1.9≦y≦2.1,
the metal oxide (X) comprises Na 2 CuO 2 , and
the positive electrode includes a positive electrode active material (Z), and a content of the metal oxide (X) in the positive electrode is 2 to 15 wt % with respect to the total weight of the positive electrode active material (Z) and the metal oxide (X).

23. A positive electrode used for a nonaqueous electrolytic solution secondary battery,
wherein the positive electrode contains a metal oxide (X) represented by A x MeO y , wherein A is at least one or two species selected from Na and K, Me

Assignees

• Numata Tatsuji
• Takahashi Hiroo
• Kajita Tetsuya
• Nec Corp

Inventors

• Numata Tatsuji
• Takahashi Hiroo
• Kajita Tetsuya

Classifications

• H01M4/131 Primary

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

• H01M4/587

  for inserting or intercalating light metals · CPC title

• Y02T10/7011

  Cross-Sectional Technologies · mapped topic

• 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

• H01M4/386

  Silicon or alloys based on silicon · CPC title