US5478671A
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Nonaqueous secondary battery
Assignee: Ube Corp
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Filing: 1993-04-03
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Granted: 1995-12-26
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Expires: 2013-04-03
Abstract
Abstract A nonaqueous secondary battery comprises an anode active material, a cathode active material and a nonaqueous electrolyte. The anode active material is a transition metal oxide of which an inherent crystal structure has been changed by insertion of lithium ions, and is in the condition that the changed crystal structure is not changed during repeated charging and discharging.
Inventors
- 👤 Yoshio Idota
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:18
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/02; H01M4/36; H01M4/48; H01M4/485; H01M10/00; H01M10/05; H01M10/056; H01M10/0564; H01M10/0565; H01M4/13; H01M4/131; H01M4/64; H01M4/66; H01M4/661; H01M6/00; H01M6/14; H01M6/18; H01M6/185; H01M6/186; H01M4/50; H01M4/505; H01M4/52; H01M4/525; H01M4/62; H01M4/621; H01M4/624; H01M4/625; H01M6/16; H01M6/162; H01M6/181; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
70 words
A nonaqueous secondary battery which comprises an anode active material, a cathode active material and a nonaqueous electrolyte; wherein said anode active material is a transition metal oxide comprising lithium ions, and wherein an inherent crystal structure of the anode active material has been changed by insertion of the lithium ions, and is in the condition that said changed crystal structure is essentially not changed during repeated charging and discharging.
Claim 2
Dependent Claim
70 words
A nonaqueous secondary battery which comprises an anode active material, a cathode active material and a nonaqueous electrolyte; wherein said anode active material is a transition metal oxide comprising lithium ions, and wherein an inherent crystal structure of the anode active material has been changed by insertion of the lithium ions, and is in the condition that said changed crystal structure is essentially not changed during repeated charging and discharging.
Claim 3
Dependent Claim
55 words
The nonaqueous secondary battery as defined in claim 1, wherein said changed crystal structure of the anode active material is characterized by an X-ray diffractogram wherein each peak strength observed in the X-ray diffractogram at the diffraction angle of 5 to 70 degrees using Cu-Kα ray is in the range of 20 to 1,000 cps.
Claim 4
Dependent Claim
74 words
The nonaqueous secondary battery as defined in claim 1, wherein said change of inherent structure by insertion of lithium ions is confirmed by change of the X-ray diffractogram wherein the strength of a maximum peak of the transition metal oxide prior to insertion of lithium ions decreases to one fifth thereof or less, said maximum peak being observed in the X-ray diffractogram at the diffraction angle of 5 to 70 degrees using Cu-Kα ray.
Claim 5
Dependent Claim
22 words
The nonaqueous secondary battery as defined in claim 1, wherein said anode active material is obtained by electrochemical insertion of lithium ions.
Claim 6
Dependent Claim
31 words
The nonaqueous secondary battery as defined in claim 1, wherein lithium ions are inserted into said anode active material, wherein said anode active material is a transition metal oxide comprising lithium.
Claim 7
Dependent Claim
74 words
The nonaqueous secondary battery as defined in claim 1, wherein said transition metal oxide prior to insertion of lithium ions comprises a transition metal oxide represented by Li p MO j wherein M is at least one transition metal selected from the group consisting of Ti, V, Mn, Co, Fe, Ni, Cr, Nb and Mo, p is in the range of 0 to 3.1, and j is in the range of 1.6 to 4.1.
Claim 8
Dependent Claim
69 words
The nonaqueous secondary battery as defined in claim 1, wherein said anode active material comprises a lithium-containing transition metal oxide represented by Li x MO j wherein M is at least one transition metal selected from the group consisting of Ti, V, Mn, Co, Fe, Ni, Cr, Nb and Mo, x is in the range of 0.17 to 11.25, and j is in the range of 1.6 to 4.1.
Claim 9
Dependent Claim
66 words
The lithium secondary battery as defined in claim 1, wherein said anode active material comprises a lithium-containing transition metal oxide represented by Li x M q V 1-q O j wherein M is at least one transition metal, x is in the range of 0.17 to 11.25, q is in the range of 0 to 0.7, and j is in the range of 1.3 to 4.1.
Claim 10
Dependent Claim
65 words
The nonaqueous secondary battery as defined in claim 1, wherein said cathode active material comprises a lithium-containing transition metal oxide represented by Li y MO z wherein M is at least one transition metal selected from the group consisting of Co, Mn, Ni, V and Fe, y is in the range of 0.2 to 1.2, and z is in the range of 1.4 to 3.
Claim 11
Dependent Claim
152 words
The nonaqueous secondary battery as defined in claim 1, wherein said cathode active material comprises a lithium-containing transition metal oxide selected from the group consisting of Li y CoO 2 , Li y NiO 2 , Li y Co a Ni 1-a O 2 , Li y Co b V 1-b O z , Li y Co b Fe 1-b O 2 , Li y Mn 2 O 4 , Li y Mn c Co 2-c O 4 , Li y Mn c Ni 2-c O 4 , Li y Mn c V 2-c O 4 and Li y Mn c Fe 2-c O 4 wherein y is in the range of 0.5 to 1.2, a is in the range of 0.1 to 0.9, b is in the range of 0.8 to 0.98, c is in the range of 1.6 to 1.96, and z is in the range of 2.01 to 2.3.
Claim 12
Dependent Claim
25 words
The nonaqueous secondary battery as defined in claim 1, wherein the transition metal oxide into which the lithium ions are inserted has been previously burned.
Claim 13
Dependent Claim
33 words
The nonaqueous secondary battery as defined in claim 1, wherein the transition metal oxide into which the lithium ions are inserted has been previously burned at a temperature of 250° to 2,000° C.
Claim 14
Dependent Claim
33 words
The nonaqueous secondary battery as defined in claim 1, wherein the transition metal oxide into which the lithium ions are inserted has been previously burned at a temperature of 350° to 1,500° C.
Claim 15
Dependent Claim
49 words
The nonaqueous secondary battery as defined in claim 1, wherein the transition metal oxide into which the lithium ions are inserted contains Li and at least one element selected from the group consisting of Ca, P, B, Si, Na, K, Mg, Sn, Al, Ga, Ge, Ce, In and Bi.
Claim 16
Dependent Claim
78 words
The nonaqueous secondary battery as defined in claim 1, wherein the transition metal oxide into which the lithium ions are inserted contains Li and at least one element selected from the group consisting of P, B and Si, and which has been incorporated into the transition metal oxide by burning P 2 O 5 , Li 3 PO 4 , H 3 BO 3 or SiO 2 in combination with a transition metal oxide and a lithium compound.
Claim 17
Dependent Claim
77 words
The nonaqueous secondary battery as defined in claim 1, wherein the transition metal oxide into which the lithium ions are inserted contains Li and at least one element selected from the group consisting of Sn, Al, Ga, Ge, Ce, In and Bi, and which has been incorporated into the transition metal oxide by burning an oxide, a hydroxide, a carbonate or a nitrate of the element in combination with a transition metal oxide and a lithium compound.
Claim 18
Dependent Claim
31 words
The nonaqueous secondary battery as defined in claim 1, wherein the transition metal oxide into which the lithium ions are inserted has a mean grain size of 0.03 to 50 μm.
Claim 19
Dependent Claim
24 words
The nonaqueous secondary battery as defined in claim 1, wherein the cathode active material has a mean grain size of 0.03 to 50 μm.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1998-12-25 | 1999-06-26 | 1999-12-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-12-25 | 2003-06-26 | 2003-12-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-12-25 | 2007-06-26 | 2007-12-26 | $7700.00 | Window Closed / Lapsed |