US4945014A
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Secondary battery
Assignee: Mitsubishi Chemical Corp
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Filing: 1989-02-02
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Granted: 1990-07-31
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Expires: 2009-02-02
Abstract
Abstract There is disclosed a secondary battery having a negative electrode composed of an active substance and a carrier carrying the active substance, which comprises (1) the active substance is lithium or an alkali metal mainly composed of lithium, (2) the carrier is a mixture composed of (a) a carbonaceous material having (i) an atomic ratio of hydrogen/carbon of less than 0.15 and (ii) a spacing of (002) planes (d 002 ) as determined by X-ray wide angle diffraction of 3.37 Å or more and a crystallite size in the direction of c axis of 150 Å or less, and (b) a metal capable of forming an alloy with the active substance and/or an alloy with the active substance.
Inventors
- 👤 Mitsutaka Miyabayashi
- 👤 Toshifumi Nishii
- 👤 Hiroshi Yui
- 👤 Kuniaki Inada
- 👤 Katsuji Ikeda
- 👤 Hiroyoshi Nose
- 👤 Kenji Tsuchiya
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 12:04
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/02; H01M4/13; H01M4/134; H01M10/00; H01M10/05; H01M10/052; H01M4/04; H01M4/0438; H01M4/0459; H01M4/36; H01M4/362; H01M4/364; H01M4/38; H01M4/58; H01M4/583; H01M4/587; H01M2004/026; H01M2004/027; H01M2300/00; H01M2300/0017; H01M2300/0025; H01M2300/0065; H01M2300/0068; H01M2300/0082; H01M4/043; H01M4/0433; H01M4/40; H01M4/405; H01M4/62; H01M4/621; H01M4/624; H01M4/625; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
117 words
In a secondary battery having a negative electrode composed of an active substance and a carrier carrying said active substance, the improvement wherein (1) said active substance is lithium or an alkali metal mainly composed of lithium, (2) said carrier is a mixture composed of (a) a carbonaceous material having (i) an atomic ratio of hydrogen/carbon of less than 0.15 and (ii) a spacing of (002) planes (d 002 ) as determined by X-ray wide angle diffraction of 3.37 Å or more and a crystallite size in the direction of c axis of 150 Å or less, and (b) an alloy including said active substance and/or a metal capable of forming an alloy with said active substance.
Claim 2
Dependent Claim
117 words
In a secondary battery having a negative electrode composed of an active substance and a carrier carrying said active substance, the improvement wherein (1) said active substance is lithium or an alkali metal mainly composed of lithium, (2) said carrier is a mixture composed of (a) a carbonaceous material having (i) an atomic ratio of hydrogen/carbon of less than 0.15 and (ii) a spacing of (002) planes (d 002 ) as determined by X-ray wide angle diffraction of 3.37 Å or more and a crystallite size in the direction of c axis of 150 Å or less, and (b) an alloy including said active substance and/or a metal capable of forming an alloy with said active substance.
Claim 3
Dependent Claim
24 words
The secondary battery according to claim 1, wherein a formulating amount of the carbonaceous material in the mixture is 10 to 97% by weight.
Claim 4
Dependent Claim
24 words
The secondary battery according to claim 2, wherein a formulating amount of the carbonaceous material in the mixture is 40 to 95% by weight.
Claim 5
Dependent Claim
24 words
The secondary battery according to claim 3, wherein a formulating amount of the carbonaceous material in the mixture is 50 to 93% by weight.
Claim 6
Dependent Claim
36 words
The secondary battery according to claim 1, wherein a volume average diameter of particles of the carbonaceous material is 100 μm or less and a specific surface area thereof is 1 m 2 /g or more.
Claim 7
Dependent Claim
40 words
The secondary battery according to claim 1, wherein said metal which is capable of being alloyed with said active substance and/or said alloy including said active substance is/are powder having a volume average particle size of 30 μm or less.
Claim 8
Dependent Claim
22 words
The secondary battery according to claim 1, wherein a total pore volume of said carbonaceous material is 1.5×10 -3 ml/g or more.
Claim 9
Dependent Claim
17 words
The secondary battery according to claim 1, wherein an average pore radius is 8 to 100 Å.
Claim 10
Dependent Claim
14 words
The secondary battery according to claim 1, wherein the mixture is a uniform mixture.
Claim 11
Dependent Claim
37 words
The secondary battery according to claim 1, wherein said carbonaceous material has a two-fold distance a 0 of a spacing (d 110 ) of (110) planes in X-ray wide angle diffraction being 2.38 Å to 2.47 Å.
Claim 12
Dependent Claim
26 words
The secondary battery according to claim 1, wherein said carbonaceous material has a crystallite size La in the direction of a-axis being 10 Å or more.
Claim 13
Dependent Claim
49 words
The secondary battery according to claim 1, wherein said carbonaceous material has the atomic ratio of hydrogen/carbon of less than 0.15, the spacing (d 002 ) of (002) planes of 3.39 to 3.75 Å and the crystalline size in the direction of c axis of 5 to 150 Å.
Claim 14
Dependent Claim
87 words
The secondary battery according to claim 1, wherein said carbonaceous material has the atomic ratio of hydrogen/carbon of less than 0.10, the spacing (d 002 ) of (002) planes of 3.41 to 3.70 Å, the crystallite size in the direction of c axis of 10 to 80 Å, a two-fold distance a 0 of a spacing (d 110 ) of (110) planes in X-ray wide angle diffraction of 2.38 Å to 2.47 Å and a crystallite size in the direction of a-axis of 2.39 to 2.46 Å.
Claim 15
Dependent Claim
34 words
The secondary battery according to claim 1, wherein said metal capable of forming an alloy with said active substance is at least one selected from the group consisting of Al, Pb, Bi and Cd.
Claim 16
Dependent Claim
34 words
The secondary battery according to claim 1, wherein said alloy with said active substance is an alloy of Li and at least one selected from the group consisting of Al, Pb, Bi and Cd.
Claim 17
Dependent Claim
42 words
The secondary battery according to claim 1, wherein said carrier is obtained by mechanically mixing carbonaceous material powder and powder of the metal capable of forming an alloy with the active substance and/or the powder of the alloy of the active substance.
Claim 18
Dependent Claim
39 words
The secondary battery according to claim 1, wherein said carrier is obtained by coating the metal capable of forming an alloy with the active substance and/or an alloy with the active substance on the surface of the carbonaceous material.
Claim 19
Dependent Claim
38 words
The secondary battery according to claim 1, wherein said carrier is obtained by mixing an organic compound and an organometallic compound containing the metal capable of forming an alloy with the active substance and then pyrolyzing the mixture.
Claim 20
Dependent Claim
39 words
The secondary battery according to claim 1, wherein said carrier is obtained by contacting an organometallic compound containing a metal capable of forming an alloy with the active substance, with the carbonaceous material and then pyrolyzing the organometallic compound.
Claim 21
Dependent Claim
24 words
The secondary battery according to claim 1 wherein a volume average diameter of particles of the carbonaceous material is 1 μm to 150 μm.
Claim 22
Dependent Claim
47 words
The secondary battery according to claim 1, wherein said metal which is capable of being alloyed with said active substance or an alloy of said active substance is powder having a volume average diameter of particles not more than a volume average diameter of the carbonaceous material.
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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) | 1993-07-30 | 1994-01-29 | 1994-07-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-07-30 | 1998-01-29 | 1998-07-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-07-30 | 2002-01-29 | 2002-07-31 | $7700.00 | Window Closed / Lapsed |