US5162170A
Expired / Lapsed
US
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Electrode for secondary battery
Assignee: Mitsubishi Chemical Corp
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Filing: 1990-07-16
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Granted: 1992-11-10
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Expires: 2010-07-16
Abstract
Abstract An electrode for a secondary battery, comprising a net or sheet made of a metal having laminated thereon a mixture comprising 85 to 99.9% by weight of a carbonaceous material and 0.1 to 15% by weight of an elastomer. The carbonaceous material has a hydrogen/carbon (H/C) atomic ratio of less than 0.15, a spacing (d 002 ) of the (002) plane according to an X-ray wide angle diffraction method of 3.37 Å to 3.75 Å, a volume average particle size of 0.5 μm and a total fine pore volume of 1.5×10 -3 ml/g or more. Lithium or a material substantially comprising lithium is carried on the carbonaceous material. The electrode has a thickness of 5 to 500 μm. The resultant electrode has an high energy density, and has the requisite flexibility to obtain a coil-shaped electrode.
Inventors
- 👤 Mitsutaka Miyabayashi
- 👤 Hiroshi Yui
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 18:09
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; H01M4/0461; H01M4/36; H01M4/362; H01M4/364; H01M4/38; H01M4/381; H01M4/58; H01M4/583; H01M4/587; H01M4/62; H01M4/621; H01M2004/026; H01M2004/027; H01M2300/00; H01M2300/0017; H01M2300/0025; H01M2300/0065; H01M4/043; H01M4/0433; H01M4/049; H01M4/0492; H01M4/40; H01M4/405; H01M4/624; H01M4/625; H01M4/64; H01M4/66; H01M4/661; H01M4/70; H01M4/72; H01M4/74; H01M6/00; H01M6/04; H01M6/06; H01M6/10; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
126 words
An electrode for a secondary battery, comprising a net or sheet made of a metal having laminated thereon a mixture comprising 85 to 99.9% by weight of a carbonaceous material and 0.1 to 15% by weight of an elastomer, said carbonaceous material having a hydrogen/carbon (H/C) atomic ratio of less than 0.15, a spacing (d 002 ) of the (002) plane according to the X-ray wide angle diffraction method of 3.37 Å to 3.75 Å, a volume average particle size of 0.5 μm to 150 μm and a total fine pore volume of 1.5×10 -3 ml/g or more, said carbonaceous material carrying an active substance comprising lithium, said electrode having a thickness of 5 to 500 μm and being rolled in the shape of a spiral.
Claim 2
Dependent Claim
126 words
An electrode for a secondary battery, comprising a net or sheet made of a metal having laminated thereon a mixture comprising 85 to 99.9% by weight of a carbonaceous material and 0.1 to 15% by weight of an elastomer, said carbonaceous material having a hydrogen/carbon (H/C) atomic ratio of less than 0.15, a spacing (d 002 ) of the (002) plane according to the X-ray wide angle diffraction method of 3.37 Å to 3.75 Å, a volume average particle size of 0.5 μm to 150 μm and a total fine pore volume of 1.5×10 -3 ml/g or more, said carbonaceous material carrying an active substance comprising lithium, said electrode having a thickness of 5 to 500 μm and being rolled in the shape of a spiral.
Claim 3
Dependent Claim
48 words
An electrode for a secondary battery according to claim 1, wherein the carbonaceous material has a G value as defined by the following formula of less than 2.5 in the Raman spectrum analysis by use of an argon ion laser beam with a wavelength of 5145 Å: ##EQU6##
Claim 4
Dependent Claim
30 words
The electrode for a secondary battery according to claim 1 which is a compression molded product of a mixture of particles of the carbonaceous material and particles of the elastomer.
Claim 5
Dependent Claim
30 words
The electrode for a secondary battery according to claim 1, which is a product obtained by mixing and drying particles of the carbonaceous material and an emulsion of the elastomer.
Claim 6
Dependent Claim
39 words
The electrode for a secondary battery according to claim 1, which is a product obtained by coating a solution of the elastomer onto the surface of particles of the carbonaceous material, drying the coated product and then pressurizing it.
Claim 7
Dependent Claim
44 words
The electrode for a secondary battery according to claim 1, which is a product obtained by mixing particles of the carbonaceous material coated on the surface with a solution of the elastomer and uncoated particles of the carbonaceous material, followed by pressurization under heating.
Claim 8
Dependent Claim
58 words
The electrode for a secondary battery according to claim 1, which is a product obtained by pressurizing under heating a mixture of 4/5 or less in weight ratio of particles of the carbonaceous material coated on the surface with a solution of the elastomer and 1/5 or more in weight ratio of uncoated particles of the carbonaceous material.
Claim 9
Dependent Claim
17 words
The electrode for a secondary battery according to claim 1, wherein the elastomer is a thermoplastic elastomer.
Claim 10
Dependent Claim
34 words
The electrode for a secondary battery according to claim 8, wherein the elastomer is a styrene type thermoplastic polymer comprising a block copolymer of styrene and a conjugated diene or a hydrogenated product thereof.
Claim 11
Dependent Claim
24 words
The electrode for a secondary battery according to claim 9, wherein the styrene type thermoplastic elastomer has a molecular weight of 2,000 to 50,000.
Claim 12
Dependent Claim
25 words
The electrode for a secondary battery according to claim 1, wherein he average fine pore radius of the carbonaceous material is 8 to 100 Å.
Claim 13
Dependent Claim
36 words
The electrode for a secondary battery according to claim 3, wherein said elastomer has particles of an average particle size of 1/2 or less of the average particle size of the particles of the carbonaceous material.
Claim 14
Dependent Claim
42 words
The electrode for a secondary battery according to claim 5, wherein the surface of particles of said carbonaceous material is coated by the elastomer with a thickness of 1/3 or less of the average particle size of particles of the carbonaceous material.
Claim 15
Dependent Claim
36 words
The electrode for a secondary battery according to claim 5, wherein the surface of particles of said carbonaceous material is coated by the elastomer over the surface area of 4/5 of the whole surface area thereof.
Claim 16
Dependent Claim
22 words
The electrode for a secondary battery according to claim 8, wherein he thermoplastic elastomer has a molecular weight of 2000 to 500,000.
Claim 17
Dependent Claim
21 words
The electrode for a secondary battery according to claim 1, wherein the net or sheet is made of nickel or copper.
Claim 18
Dependent Claim
174 words
The electrode for a secondary battery according to claim 2, wherein the hydrogen/carbon atomic ratio is less than 0.07; the spacing (d 002 ) of the (001) plane is 3.41 to 3.70 Å; the G value is less than 2.0; the volume average particle size is 2 to 100 μm; the total fine pore volume is 2.0×10 -3 ml/g or more; the carbonaceous material has an average fine pore radius of 8 to 100 Å; the carbonaceous material has a crystallite size in the c-axis direction of 220 Å or less; the carbonaceous material has a two-fold distance a 0 (=2d 110 ) of the spacing (d 110 ) of the (110) plane in an x-ray wide angle diffraction analysis of 2.38 to 2.47 Å and a crystallite size in the a-axis direction of 10 Å or more; the elastomer is a block copolymer of styrene and a conjugated diene, or a hydrogenation product thereof, having a molecular weight of 2000 to 500,000; and the net or sheet is made of nickel or copper.
Claim 19
Dependent Claim
178 words
The electrode for a secondary battery according to claim 2, wherein the hydrogen/carbon ratio is less than 0.05; the spacing (d 002 ) of the (002) plane is 3.4 to 3.70 Å; the g value is 0.2 to less than 1.2; the volume average particle size is 5 to 30 μm; the total fine pore volume is 3.0×10 -3 ml/g to 8×10 -2 ml/g; the carbonaceous material has an average fine pore radius of 10 to 80 Å; the carbonaceous material has a crystallite size in the c-axis direction of 5 to 150 Å; the carbonaceous material has a two-fold distance a 0 (=2d 110 ) of the spacing (d 110 ) of the (110) plane in an x-ray wide angle diffraction analysis of 2.39 to 2.46 Å and a crystallite size of in the a-axis direction of 15 to 150 Å, the elastomer is a block copolymer of styrene and a conjugated diene, or a hydrogenation product thereof, having a molecular weight of 2000 to 500,000; and the net or sheet is made of nickel or copper.
Claim 20
Dependent Claim
122 words
The electrode for a secondary battery according to claim 2, wherein the total fine pore volume is 4.0×10 -3 ml/g to 3×10 -2 ml/g; the average fine pore radius is 12 to 60 Å; the crystallite size in the c-axis direction is 10 to 80 Å; the crystallite size in the a-axis is 19 Å is 70 Å; the elastomer has a molecular weight of 5,000 to 300,000; said material comprising lithium being an alloy or lithium and a metal M selected from the group consisting of Al, Pb, Zn, Sn, Bi, In, Mg, Ga, Cd, Ag, Si, B, Au, Pt, Pd and Sb, said M in said alloy being in an amount of 5 to 50 weight % of said alloy.
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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) | 1995-11-10 | 1996-05-11 | 1996-11-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-11-10 | 2000-05-11 | 2000-11-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-11-10 | 2004-05-11 | 2004-11-10 | $7700.00 | Window Closed / Lapsed |