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Patent US5702845A successfully refreshed from Google Patents.
US5702845A
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Secondary battery using lithium
Assignee: Canon Inc
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Filing: 1996-03-13
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Granted: 1997-12-30
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Expires: 2016-03-13
Abstract
Abstract The present invention is directed to provide a secondary battery using lithium which includes at least a negative electrode, a positive electrode, a separator provided between said negative electrodes and said positive electrode, and an electrolyte, wherein at least either of said negative electrode or said positive includes an active material having porous hollow structure as a host for intercalating/deintercalating guest lithium ion. The secondary battery shows high electric capacity, high charging/discharging efficiency, high energy density, and long cycle life.
Inventors
- 👤 Soichiro Kawakami
- 👤 Naoya Kobayashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 20:12
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/02; H01M4/36; H01M4/48; H01M4/50; H01M4/505; H01M10/00; H01M10/05; H01M4/13; H01M4/134; H01M10/052; H01M10/0525; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
81 words
A secondary battery using lithium comprising at least a negative electrode, a positive electrode, a separator provided between said negative electrode and said positive electrode, and an electrolyte, wherein at least either of said negative electrode or said positive electrode comprises an active material having a porous hollow structure, wherein said porous hollow structure comprises an outer shell surrounding a hollow core section and a plurality of pores each extending completely through said shell to communicate with said hollow core section.
Claim 2
Dependent Claim
81 words
A secondary battery using lithium comprising at least a negative electrode, a positive electrode, a separator provided between said negative electrode and said positive electrode, and an electrolyte, wherein at least either of said negative electrode or said positive electrode comprises an active material having a porous hollow structure, wherein said porous hollow structure comprises an outer shell surrounding a hollow core section and a plurality of pores each extending completely through said shell to communicate with said hollow core section.
Claim 3
Dependent Claim
24 words
A secondary battery using lithium according to claim 1, wherein said active material acts as a host intercalating or deintercalating lithium ions as guests.
Claim 4
Dependent Claim
27 words
A secondary battery using lithium according to claim 1, wherein said active material having porous hollow structure for the positive electrode comprises at least a metal oxide.
Claim 5
Dependent Claim
36 words
A secondary battery using lithium according to claim 1, wherein said active material having porous hollow structure for said negative electrode or said positive electrode is provided with a conductive material in the hollow core section.
Claim 6
Dependent Claim
38 words
A secondary battery using lithium according to claim 1, wherein said active material having porous structure for said negative electrode is selected from the group consisting of a carbonaceous material, metal, metal oxide and a composite material thereof.
Claim 7
Dependent Claim
56 words
A secondary battery using lithium according to claim 1, wherein said active material for said negative electrode is a carbonaceous material, and contains at least one element selected from the group consisting of Group IIIB elements, Group IVB elements, Group VB elements, Group VIB elements, and Group VIIB elements in the periodic table of the elements.
Claim 8
Dependent Claim
26 words
A secondary battery using lithium according to claim 6, wherein said Group IIIB element contained in said carbonaceous active material for said negative electrode is boron.
Claim 9
Dependent Claim
34 words
A secondary battery using lithium according to claim 6, wherein said Group VB element contained in said carbonaceous active material for said negative electrode is at least one element selected from nitrogen and phosphorus.
Claim 10
Dependent Claim
26 words
A secondary battery using lithium according to claim 6, wherein said Group IVB element contained in said carbonaceous active material for said negative electrode is silicon.
Claim 11
Dependent Claim
34 words
A secondary battery using lithium according to claim 6, wherein said Group VIB element contained in said carbonaceous active material for said negative electrode is at least one element selected from oxygen and sulfur.
Claim 12
Dependent Claim
34 words
A secondary battery using lithium according to claim 6, wherein said Group VIIB element contained in said carbonaceous active material for said negative electrode is at least one element selected from fluorine and chlorine.
Claim 13
Dependent Claim
29 words
A secondary battery using lithium according to claim 1, wherein said battery further comprises a housing for storing said negative electrode, said positive electrode, said separator, and said electrolyte.
Claim 14
Dependent Claim
25 words
A secondary battery using lithium according to claim 1, wherein said negative electrode comprises an active material layer retaining said active material, and a collector.
Claim 15
Dependent Claim
25 words
A secondary battery using lithium according to claim 1, wherein said positive electrode comprises an active material layer retaining said active material, and a collector.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2000-12-29 | 2001-06-30 | 2001-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-12-29 | 2005-06-30 | 2005-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-12-29 | 2009-06-30 | 2009-12-30 | $7700.00 | Window Closed / Lapsed |