US5225296A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrode and method of producing the same
Assignee: Ricoh Co Ltd
•
Filing: 1990-11-21
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Granted: 1993-07-06
•
Expires: 2010-11-21
Abstract
Abstract An electrode comprises a porous carbon sheet comprising (a) carbon fibers and (b) a carbon matrix which comprises carbon particles and is integrally combined with the carbon fibers, having continuous through-holes. This electrode can be used as a cathode or anode for a battery. This type of electrode is prepared by depositing a phenolic resin on a phenolic resin sheet comprising phenolic resin fibers, and carbonizing the phenolic resin and the phenolic resin sheet in an oxygen-free atmosphere at temperatures in the range of 500 DEG C. to 3000 DEG C.
Inventors
- 👤 Toshiyuki Ohsawa
- 👤 Toshiyuki Kabata
- 👤 Yoshiaki Echigo
- 👤 Tutomu Sakaida
- 👤 Keiichi Asami
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:39
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/02; H01M4/13; H01M4/137; D; D01; D01F; D01F11/00; D01F11/10; D01F11/16; H01M4/64; H01M4/66; H01M4/663; H01M4/86; H01M4/96; Y; Y02; Y02E; Y02E60/00; Y02E60/10; Y02E60/30; Y02E60/50; Y02P; Y02P70/00; Y02P70/50
Claims Analysis
Total Claims: 38
Claim 1
Independent Claim
31 words
An electrode comprising a porous carbon sheet comprising (a) carbon fibers and (b) a carbon matrix which comprises carbon particles and is integrally combined with said carbon fibers, having continuous through-holes.
Claim 2
Dependent Claim
31 words
An electrode comprising a porous carbon sheet comprising (a) carbon fibers and (b) a carbon matrix which comprises carbon particles and is integrally combined with said carbon fibers, having continuous through-holes.
Claim 3
Dependent Claim
32 words
The electrode as claimed in claim 1, further comprising an electroconductive polymeric material which is deposited on the surface of said carbon fibers and said carbon particles in said porous carbon sheet.
Claim 4
Dependent Claim
29 words
The electrode as claimed in claim 2, wherein said electroconductive polymeric material is directly deposited on the surfaces of said carbon fibers and said carbon particles by electrolytic polymerization.
Claim 5
Dependent Claim
30 words
The electrode as claimed in claim 1, further comprising silica particles which are deposited on the surfaces of said carbon fibers and said carbon particles in said porous carbon sheet.
Claim 6
Dependent Claim
20 words
The electrode as claimed in claim 4, wherein said silica particles have a particle diameter of 1 μm or less.
Claim 7
Dependent Claim
33 words
The electrode as claimed in claim 4, further comprising an electroconductive polymeric material which is deposited on the silica-deposited surfaces of said carbon fibers and said carbon particles in said porous carbon sheet.
Claim 8
Dependent Claim
20 words
The electrode as claimed in claim 6, wherein said silica particles have a particle diameter of 1 μm or less.
Claim 9
Dependent Claim
82 words
An electrode comprising a porous carbon sheet comprising (a) carbon fibers and (b) a carbon matrix which comprises carbon particles and is integrally combined with said carbon fibers, having continuous through-holes, said porous carbon sheet being prepared by depositing a phenolic resin in the form of a dispersion on a phenolic resin sheet comprising phenolic resin fibers, and carbonizing said phenolic resin and said phenolic resin sheet in an oxygen-free atmosphere at temperatures in the range of 500° C. to 3000° C.
Claim 10
Dependent Claim
82 words
An electrode comprising a porous carbon sheet comprising (a) carbon fibers and (b) a carbon matrix which comprises carbon particles and is integrally combined with said carbon fibers, having continuous through-holes, said porous carbon sheet being prepared by depositing a phenolic resin in the form of a dispersion on a phenolic resin sheet comprising phenolic resin fibers, and carbonizing said phenolic resin and said phenolic resin sheet in an oxygen-free atmosphere at temperatures in the range of 500° C. to 3000° C.
Claim 11
Dependent Claim
114 words
An electrode comprising a porous carbon sheet comprising (a) carbon fibers, (b) a carbon matrix which comprises carbon particles and is integrally combined with said carbon fibers, having through-holes, and (c) silica particles deposited on the surfaces of said carbon fibers and said carbon matrix, said porous carbon sheet being prepared by (i) depositing a phenolic resin in the form of a dispersion on a phenolic resin sheet comprising phenolic resin fibers, (ii) carbonizing said phenolic resin and said phenolic resin sheet in an oxygen-free atmosphere at temperature in the range of 500° C. to 3000° C., and (iii) depositing said silica particles on the surfaces of said carbon fibers and said carbon matrix.
Claim 12
Dependent Claim
114 words
An electrode comprising a porous carbon sheet comprising (a) carbon fibers, (b) a carbon matrix which comprises carbon particles and is integrally combined with said carbon fibers, having through-holes, and (c) silica particles deposited on the surfaces of said carbon fibers and said carbon matrix, said porous carbon sheet being prepared by (i) depositing a phenolic resin in the form of a dispersion on a phenolic resin sheet comprising phenolic resin fibers, (ii) carbonizing said phenolic resin and said phenolic resin sheet in an oxygen-free atmosphere at temperature in the range of 500° C. to 3000° C., and (iii) depositing said silica particles on the surfaces of said carbon fibers and said carbon matrix.
Claim 13
Independent Claim
85 words
A method of producing an electrode comprising a porous carbon sheet comprising (a) carbon fibers and (b) a carbon matrix which comprises carbon particles and is integrally combined with said carbon fibers, having continuous through-holes, comprising the steps of (i) depositing a phenolic resin in the form of a dispersion on a phenolic resin sheet comprising phenolic resin fibers, and (ii) carbonizing said phenolic resin and said phenolic resin sheet in an oxygen-free atmosphere at temperatures in the range of 500° C. to 3000° C.
Claim 14
Independent Claim
85 words
A method of producing an electrode comprising a porous carbon sheet comprising (a) carbon fibers and (b) a carbon matrix which comprises carbon particles and is integrally combined with said carbon fibers, having continuous through-holes, comprising the steps of (i) depositing a phenolic resin in the form of a dispersion on a phenolic resin sheet comprising phenolic resin fibers, and (ii) carbonizing said phenolic resin and said phenolic resin sheet in an oxygen-free atmosphere at temperatures in the range of 500° C. to 3000° C.
Claim 15
Independent Claim
115 words
A method of producing an electrode comprising a porous carbon sheet comprising (a) carbon fibers, (b) a carbon matrix which comprises carbon particles and is integrally combined with said carbon fibers, having through-holes, and (c) silica particles deposited on the surfaces of said carbon fibers and said carbon matrix, comprising the steps of (i) depositing a phenolic resin in the form of a dispersion on a phenolic resin sheet comprising phenolic resin fibers, (ii) carbonizing said phenolic resin and said phenolic resin sheet in an oxygen-free atmosphere at temperatures in the range of 500° C. to 3000° C., and (iii) depositing said silica particles on the surfaces of said carbon fibers and said carbon matrix.
Claim 16
Independent Claim
115 words
A method of producing an electrode comprising a porous carbon sheet comprising (a) carbon fibers, (b) a carbon matrix which comprises carbon particles and is integrally combined with said carbon fibers, having through-holes, and (c) silica particles deposited on the surfaces of said carbon fibers and said carbon matrix, comprising the steps of (i) depositing a phenolic resin in the form of a dispersion on a phenolic resin sheet comprising phenolic resin fibers, (ii) carbonizing said phenolic resin and said phenolic resin sheet in an oxygen-free atmosphere at temperatures in the range of 500° C. to 3000° C., and (iii) depositing said silica particles on the surfaces of said carbon fibers and said carbon matrix.
Claim 17
Dependent Claim
35 words
A battery comprising as a cathode or anode electrode an electrode comprising (a) carbon fibers and (b) a carbon matrix which comprises carbon particles and is integrally combined with said carbon fibers, having continuous through-holes.
Claim 18
Dependent Claim
35 words
A battery comprising as a cathode or anode electrode an electrode comprising (a) carbon fibers and (b) a carbon matrix which comprises carbon particles and is integrally combined with said carbon fibers, having continuous through-holes.
Claim 19
Dependent Claim
35 words
The battery as claimed in claim 12, wherein said electrode further comprises an electroconductive polymeric material which is deposited on the surface of said carbon fibers and said carbon particles in said porous carbon sheet.
Claim 20
Dependent Claim
29 words
The battery as claimed in claim 13, wherein said electroconductive polymeric material is directly deposited on the surfaces of said carbon fibers and said carbon particles by electrolytic polymerization.
Claim 21
Dependent Claim
33 words
The battery as claimed in claim 12, wherein said electrode further comprises silica particles which are deposited on the surfaces of said carbon fibers and said carbon particles in said porous carbon sheet.
Claim 22
Dependent Claim
20 words
The battery as claimed in claim 15, wherein said silica particles have a particle diameter of 1 μm or less.
Claim 23
Dependent Claim
36 words
The battery as claimed in claim 15, wherein said electrode further comprises an electroconductive polymeric material which is deposited on the silica-deposited surfaces of said carbon fibers and said carbon particles in said porous carbon sheet.
Claim 24
Dependent Claim
20 words
The battery as claimed in claim 15, wherein said silica particles have a particle diameter of 1 μm or less.
Claim 25
Dependent Claim
90 words
A battery comprising as a cathode or anode an electrode comprising a porous carbon sheet comprising (a) carbon fibers and (b) a carbon matrix which comprises carbon particles and is integrally combined with said carbon fibers, having continuous through-holes, said porous carbon sheet being prepared by depositing a phenolic resin in the form of a dispersion on a phenolic resin sheet comprising phenolic resin fibers, and carbonizing said phenolic resin and said phenolic resin sheet in an oxygen-free atmosphere at temperatures in the range of 500° C. to 3000° C.
Claim 26
Dependent Claim
90 words
A battery comprising as a cathode or anode an electrode comprising a porous carbon sheet comprising (a) carbon fibers and (b) a carbon matrix which comprises carbon particles and is integrally combined with said carbon fibers, having continuous through-holes, said porous carbon sheet being prepared by depositing a phenolic resin in the form of a dispersion on a phenolic resin sheet comprising phenolic resin fibers, and carbonizing said phenolic resin and said phenolic resin sheet in an oxygen-free atmosphere at temperatures in the range of 500° C. to 3000° C.
Claim 27
Dependent Claim
122 words
A battery comprising as a cathode or anode an electrode comprising a porous carbon sheet comprising (a) carbon fibers, (b) a carbon matrix which comprises carbon particles and is integrally combined with said carbon fibers, having through-holes, and (c) silica particles deposited on the surfaces of said carbon fibers and said carbon matrix, said porous carbon sheet being prepared by (i) depositing a phenolic resin in the form of a dispersion on a phenolic resin sheet comprising phenolic resin fibers, (ii) carbonizing said phenolic resin and said phenolic resin sheet in an oxygen-free atmosphere at temperatures in the range of 500° C. to 3000° C., and (iii) depositing said silica particles on the surfaces of said carbon fibers and said carbon matrix.
Claim 28
Dependent Claim
122 words
A battery comprising as a cathode or anode an electrode comprising a porous carbon sheet comprising (a) carbon fibers, (b) a carbon matrix which comprises carbon particles and is integrally combined with said carbon fibers, having through-holes, and (c) silica particles deposited on the surfaces of said carbon fibers and said carbon matrix, said porous carbon sheet being prepared by (i) depositing a phenolic resin in the form of a dispersion on a phenolic resin sheet comprising phenolic resin fibers, (ii) carbonizing said phenolic resin and said phenolic resin sheet in an oxygen-free atmosphere at temperatures in the range of 500° C. to 3000° C., and (iii) depositing said silica particles on the surfaces of said carbon fibers and said carbon matrix.
Claim 29
Dependent Claim
14 words
The electrode as claimed in claim 1, having a porosity of 40% to 80%.
Claim 30
Dependent Claim
17 words
The battery as claimed in claim 12, wherein the electrode has a porosity of 40% to 80%.
Claim 31
Dependent Claim
17 words
The electrode as claimed in claim 1, having a volume resistivity of 50 Ω cm or less.
Claim 32
Dependent Claim
20 words
The battery as claimed in claim 12, wherein the electrode has a volume resistivity of 50 Ω cm or less.
Claim 33
Dependent Claim
17 words
The electrode as claimed in claim 1, having a water droplet absorptivity of one second or less.
Claim 34
Dependent Claim
19 words
The battery as claimed in claim 12, wherein the electrode has a water absorptivity of one second or less.
Claim 35
Dependent Claim
16 words
The electrode as claimed in claim 1, having a water absorption ratio of 60% or greater.
Claim 36
Dependent Claim
19 words
The battery as claimed in claim 12, wherein the electrode has a water absorption ratio of 60% or greater.
Claim 37
Dependent Claim
63 words
The electrode as claimed in claim 1, wherein said porous carbon sheet with said continuous through-holes exhibits a pressure drop of less than 1000 mm H 2 O when air is caused to flow at a rate of 10 Nl/min through said porous carbon sheet in the shape of a disk having a diameter of 10 mm and a thickness of 1 mm.
Claim 38
Dependent Claim
19 words
The electrode as claimed in claim 29, wherein said porous carbon sheet has a porosity of 40% to 80%.
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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) | 1996-07-05 | 1997-01-04 | 1997-07-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-07-05 | 2001-01-04 | 2001-07-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-07-05 | 2005-01-04 | 2005-07-06 | $7700.00 | Window Closed / Lapsed |