Nonaqueous electrolyte-secondary battery

• US 5,478,674 A
• Filed: 04/28/1994
• Issued: 12/26/1995
• Est. Priority Date: 04/28/1993
• Status: Expired due to Term

• Current Assignee: UBE Industries Limited
• Original Assignee: Fuji Photo Film Co Limited (Fujifilm Holdings Corporation)
• Inventors: Miyasaka, Tsutomu
• Primary Examiner(s): Willis, Jr., Prince
• Assistant Examiner(s): CHANEY, CAROL DIANE
• Application Number:
  US08/233,929
• Time in Patent Office: 607 Days
• Field of Search: 429/223, 429/224, 429/218
• US Class Current: 429/231.3
• 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 4/621 Binders
• CPC Class Codes: H01M 4/624 Electric conductive fillers
• CPC Class Codes: H01M 4/625 Carbon or graphite
• CPC Class Codes: H01M 6/164 by the solvent
• CPC Class Codes: H01M 6/168 by additives

Abstract

A lithium ion type nonaqueous electrolyte-secondary battery which comprises a positive electrode which comprises, as an active material, a compound oxide represented by the following chemical formula (I):

Li.sub.x A.sub.y M.sub.z J.sub.m O.sub.p                   (I)

wherein A represents at least one alkali element selected from the group consisting of Na and K; M represents at least one transition element selected from the group consisting of Co, Mn and Ni; J represents an element having a glass-forming ability selected from the group consisting of B, Si, Ge, P, V, Zr, Sb and Ti; 0.8≦x≦1.3; 0≦y≦0.2; 0.8≦z≦2.0; 0.01≦m≦0.2; and 2.0≦p≦2.7; a negative electrode; and a nonaqueous electrolyte. The positive electrode-active material permits the production of nonaqueous electrolyte lithium type secondary batteries having excellent charge-discharge characteristics, discharge voltages and cycle properties.

Claims

1. A lithium ion type nonaqueous electrolyte-secondary battery comprising a positive electrode which comprises, as an active material, a compound oxide represented by the following chemical formula (I):

space="preserve" listing-type="equation">Li.sub.x A.sub.y M.sub.z J.sub.m O.sub.p (I)

wherein A represents at least one alkali element selected from the group consisting of Na and K;

M represents at least one transition element selected from the group consisting of Co, Mn and Ni;

J represents an element selected from the group consisting of B, Si, Ge, P, V, Zr, and Sb;

0.8≦

x≦

1.3;

0.01≦

y≦

0.2;

0.8≦

z≦

2.0;

0.01≦

m≦

0.2; and

2.0≦

p≦

4.7;

a negative electrode; and

a nonaqueous electrolyte.

2. The nonaqueous electrolyte-secondary battery of claim 1 wherein, in the chemical formula (I), A represents Na and M represents Co;

and 0.8≦

x≦

1.3;

0.02≦

y≦

0.1;

0.8≦

z≦

1. 0.02≦

m≦

0.1; and

2.0≦

p≦

2.7.

3. The nonaqueous electrolyte-secondary battery of claim 1 wherein, in the chemical formula (I), A represents Na;

M represents Co; and

J represents P or V.

4. The nonaqueous electrolyte-secondary battery of claim 1 wherein the positive electrode-active material is a compound oxide represented by the following chemical formula:

Li_x M_z Ge_m O_p (wherein M represents at least one transition element selected from the group consisting of Co, Mn and Ni;

0.9≦

x≦

1.3;

0.8≦

z≦

2.0;

0.01≦

m≦

0.2; and

2.0≦

p≦

4.5).

5. The nonaqueous electrolyte-secondary battery of claim 4 wherein, in the chemical formula of the compound oxide, M represents Co;

0.9≦

x≦

1.3;

0.8≦

z≦

1.0; and

2.0≦

p≦

2.2.

6. The nonaqueous electrolyte-secondary battery of claim 4 wherein the compound oxide positive electrode-active material has an average particle size of not more than 2.5 μ

m.

7. The nonaqueous electrolyte-secondary battery of claim 1 wherein the positive electrode-active material is a compound oxide represented by the following chemical formula:

Li_x A_y M_z T_m O_p (wherein A represents at least one alkali element selected from the group consisting of Na and K;

M represents at least one transition element selected from the group consisting of Co, Mn and Ni;

0.8≦

x≦

1.3;

0.01≦

y≦

0.2;

0.8≦

z≦

2.0;

0.01≦

m≦

0.2; and

2.0≦

p≦

4.7).

8. The nonaqueous electrolyte-secondary battery of claim 7 wherein, in the chemical formula of the compound oxide, A represents Na and M represents Co.

9. The nonaqueous electrolyte-secondary battery of claim 7 wherein, in the chemical formula of the compound oxide, A represents Na;

M represents Co;

0.8≦

x≦

1.3;

0.02≦

y≦

0.1;

0.8≦

z≦

1.0;

0.02≦

m≦

0.1; and

2.0≦

p≦

2.7.

10. The nonaqueous electrolyte-secondary battery of claim 1 wherein the nonaqueous electrolyte comprises a propylene carbonate or ethylene carbonate-containing mixed solvent and a supporting salt.

11. The nonaqueous electrolyte-secondary battery of claim 1 wherein a carbonaceous material is used as an active material for the negative electrode.

12. The nonaqueous electrolyte-secondary battery of claim 1 wherein the nonaqueous electrolyte comprises a mixed solvent containing at least two members selected from the group consisting of propylene carbonate, ethylene carbonate, diethyl carbonate and methyl propionate and a supporting salt.