US5487960A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Nonaqueous secondary battery
Assignee: Furukawa Battery Co Ltd
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Filing: 1995-05-03
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Granted: 1996-01-30
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Expires: 2015-05-03
Abstract
Abstract A nonaqueous secondary battery comprising a positive electrode and a negative electrode, in which a mixture of the positive electrode active material contains an acid containing at least one of P, B, Si, Mo, and W or a salt thereof. The battery has improved safety in case of abrupt temperature rise.
Inventors
- 👤 Mitsutoshi Tanaka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 05:39
CPC Classifications
H; H01; H01M; H01M10/00; H01M10/05; H01M4/00; H01M4/02; H01M4/36; H01M4/58; H01M4/5825; H01M2200/00; H01M6/00; H01M6/14; H01M6/16; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
43 words
A nonaqueous secondary battery comprising a positive electrode, negative electrode and an nonaqueous electrolytic solution, wherein the positive electrode comprises a mixture of active material and an acid containing at least one of P, B, Si, Mo, and W or a salt thereof.
Claim 2
Dependent Claim
43 words
A nonaqueous secondary battery comprising a positive electrode, negative electrode and an nonaqueous electrolytic solution, wherein the positive electrode comprises a mixture of active material and an acid containing at least one of P, B, Si, Mo, and W or a salt thereof.
Claim 3
Dependent Claim
24 words
The nonaqueous secondary battery as claimed in claim 1, wherein the active material of said positive electrode mainly comprises a lithium-containing transition metal oxide.
Claim 4
Dependent Claim
24 words
The nonaqueous secondary battery as claimed in claim 2, wherein said lithium-containing transition metal oxide contains at least one of Co, Mn, and Ni.
Claim 5
Dependent Claim
29 words
The nonaqueous secondary battery as claimed in claim 1, wherein said positive electrode active material is contained in an amount of 1 to 100 g in the secondary battery.
Claim 6
Dependent Claim
37 words
The nonaqueous secondary battery as claimed in claim 1, wherein said acid or a salt thereof is contained in an amount of from 0.05 to 10% by weight based on the active material of said positive electrode.
Claim 7
Dependent Claim
23 words
The nonaqueous secondary battery as claimed in claim 1, wherein a nonaqueous electrolytic solution used in said nonaqueous secondary battery comprises ethylene carbonate.
Claim 8
Dependent Claim
29 words
The nonaqueous secondary battery as claimed in claim 6, wherein the nonaqueous electrolytic solution used in said nonaqueous secondary battery comprises a mixture of ethylene carbonate and diethyl carbonate.
Claim 9
Dependent Claim
29 words
The nonaqueous secondary battery as claimed in claim 6, wherein the nonaqueous electrolytic solution used in said nonaqueous secondary battery comprises a mixture of ethylene carbonate and dimethyl carbonate.
Claim 10
Dependent Claim
32 words
The nonaqueous secondary battery as claimed in claim 7, wherein the nonaqueous electrolytic solution used in said nonaqueous secondary battery comprises a mixture of ethylene carbonate, diethyl carbonate and LiPF 6 .
Claim 11
Dependent Claim
32 words
The nonaqueous secondary battery as claimed in claim 8, wherein the nonaqueous electrolytic solution used in said nonaqueous secondary battery comprises a mixture of ethylene carbonate, dimethyl carbonate and LiPF 6 .
Claim 12
Dependent Claim
23 words
The nonaqueous secondary battery as claimed in claim 1, wherein the active material of said negative electrode mainly comprises a lithium-containing metal oxide.
Claim 13
Dependent Claim
22 words
The nonaqueous secondary battery as claimed in claim 11, wherein the active material of said negative electrode is a calcined carbonaceous material.
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) | 1999-01-29 | 1999-07-31 | 2000-01-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-01-29 | 2003-07-31 | 2004-01-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-01-29 | 2007-07-31 | 2008-01-30 | $7700.00 | Window Closed / Lapsed |