Chemistry: electrical current producing apparatus – product – and – Fuel cell – subcombination thereof – or method of making or... – Fuel cell with solid electrolyte
Reexamination Certificate
2005-11-24
2010-11-23
Kalafut, Stephen J. (Department: 1795)
Chemistry: electrical current producing apparatus, product, and
Fuel cell, subcombination thereof, or method of making or...
Fuel cell with solid electrolyte
C429S530000, C429S535000
Reexamination Certificate
active
07838164
ABSTRACT:
It is an object of the present invention to provide a method of producing a membrane electrode assembly using an interface resistance reducing composition which can simply reduce the resistance of the interface between an electrode and an electrolyte membrane in a short time at low temperatures at low pressure without polimerization while maintaining an effect of suppressing a fuel crossover even with an electrolyte membrane having high heat resistance, high strength, a high tensile elastic modulus and a low water content. This is achieved by a method of producing a membrane electrode assembly formed by sandwiching an electrolyte membrane between a pair of electrodes, comprising the steps of bonding at least one electrode to the electrolyte membrane sandwiching an interface resistance reducing composition containing a plasticizer between the electrode and the electrolyte membrane, and a membrane electrode assembly formed by sandwiching an electrolyte membrane between a pair of electrodes, wherein the membrane electrode assembly has a layer (A) at least between one electrode and the electrolyte membrane, and the value of the storage modulus C is 1 GPA or more when the storage moduli of the electrolyte membrane and the layer (A), which are measured with an ultramicro penetrometer, are regarded as C and D, respectively.
REFERENCES:
patent: 5403675 (1995-04-01), Ogata et al.
patent: 2002/0091225 (2002-07-01), McGrath et al.
patent: 2002/0155340 (2002-10-01), Nanaumi et al.
patent: 2003/0215682 (2003-11-01), Takashita et al.
patent: 2005/0112448 (2005-05-01), Nakamura et al.
patent: 2005/0181285 (2005-08-01), Sakamoto et al.
patent: 2006/0251951 (2006-11-01), Obata et al.
patent: 2 810 794 (2001-12-01), None
patent: 59-209278 (1984-11-01), None
patent: 2-305881 (1990-12-01), None
patent: 4-132168 (1992-05-01), None
patent: 4-255776 (1992-09-01), None
patent: 9-223503 (1997-08-01), None
patent: 2001-110428 (2001-04-01), None
patent: 2004-006306 (2004-01-01), None
patent: 2004-185930 (2004-07-01), None
patent: 2004185930 (2004-07-01), None
patent: 2005-129295 (2005-05-01), None
patent: 2004-224953 (2009-08-01), None
patent: 2004051776 (2004-06-01), None
patent: 2004091027 (2004-10-01), None
Ticianelli et al., “Methods to Advance Technology of Proton Exchange Membrane Fuel Cells”, J Electrochemical Science, Electrochemistry, 53, 269 (1958).
Seishiro Murata, “Scanned Probe Microscope for Nanotechnology”, edited Science Society of Japan, Maruzen Co., Ltd. (2002).
Sulchek etal., Characterization and optimization of scan speed for tapping-mode atomic force microscopy; Rev. Sci. Instrum., vol. 73, No. 8, pp. 2928-2936 (2002).
Wang et al., “Direct polymerization of sulfonated poly(arylene ether sulfone random (statistical copolymers: candidates for new proton exchange membranes”, Journal of Membrahe Science vol. 197, 231-242 (2002).
Yanagimachi et al., Synthesis of Phosphonated poly (4-phenoxybenzoyl-1,4-phenylene) (1), Polymer Preprints, Japan, 51,750 (2002).
Wang et al., “Synthesis of Sulfonated Poly (Arylene Ether Sulfones)S Via Direct Pyolymerization”, Polymer Preprints, Japan, 41(1), 237 (2000).
Takenaka et al., “Studies on Solid Polymer Electrolyte Water Electrolysis II. Preparation Methods for Membrane-Electrocatalyst Composite”, Denki Kagaku, 53 (4), 261 (1985).
European Search Report in related application EP05809174 mailed Jan. 26, 2010.
Adachi Shinya
Izuhara Daisuke
Kidai Masayuki
Nakamura Masataka
Shimoyama Naoki
Kalafut Stephen J.
Pillsbury Winthrop Shaw & Pittman LLP
Toray Industries Inc.
LandOfFree
Film electrode composite element and production method... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Film electrode composite element and production method..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Film electrode composite element and production method... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4204434