An electrochemical cell comprising a layered structure, the layered structure comprising at least a first layer and a second layer. The first layer and the second layer are arranged adjacent to each other and form a first interface, wherein the first interface comprises a first plurality of elongated nanostructures connected to a first surface of the first layer facing the second layer, and a second plurality of elongated nanostructures connected to a second surface of the second layer facing the first layer. The first plurality of elongated nanostructures and the second plurality of elongated nanostructures are mechanically entangled.

A method for manufacturing a composite bipolar plate from a composition including at least one lamellar graphite and at least one thermoplastic polymer. This method includes dry sieving of the composition with a sieve for which the mesh diameter is less than or equal to 1,000 m, dry blending of the sieved composition, deposition of the blended composition in a mold, this mold preferably being pre-heated, molding by thermocompression of the blended composition with induction heating of the mold, and removal from the mold of the thermocompressed composition leading to the obtaining of the composite bipolar plate. A composite bipolar plate manufactured by this method, to the use of this composite bipolar plate as well as to a fuel cell including such a composite bipolar plate.

A solid oxide fuel cell having an electric power generating element unit that is configured by sandwiching a solid electrolyte layer between a fuel electrode layer and an oxygen electrode layer with a pore that is present in the solid electrolyte layer and is covered with a sealing material. In addition, a pore that is present in an interconnector, which is electrically connected to the fuel electrode layer or the oxygen electrode layer, is covered with the sealing material. Consequently, the solid oxide fuel cell is capable of easily preventing gas leakage.

Provided are electrochemical cells that include a compound having the general formula

##STR00001##

wherein R.sub.1 is moiety associated with a lithium ion, X.sub.1 and X.sub.3 are unsubstituted methylene moieties, X.sub.2 and X.sub.4 are each independently selected from a substituted or unsubstituted methylene moiety, X is a substituted or unsubstituted C.sub.1-C.sub.10 alkylene moiety, arylene moiety or heteroarylene moiety, R.sub.2 is selected from Li, H, an alkyl moiety, or a heteroalkyl moiety, 0<m1, 0n1, and m+n=1.

Provided are electrochemical cells that include a compound having the general formula

##STR00001##

wherein R.sub.1 is moiety associated with a lithium ion, X.sub.1 and X.sub.3 are unsubstituted methylene moieties, X.sub.2 and X.sub.4 are each independently selected from a substituted or unsubstituted methylene moiety, X is a substituted or unsubstituted C.sub.1-C.sub.10 alkylene moiety, arylene moiety or heteroarylene moiety, R.sub.2 is selected from Li, H, an alkyl moiety, or a heteroalkyl moiety, 0<m1, 0n1, and m+n=1.

A process including coating a fuel cell component with an aqueous solution including a polyelectrolyte polymer.

A bipolar plate for a fuel cell is provided, which includes: a metal substrate having a flow field structure; a conducting adhesion layer formed on the metal substrate and having a polymeric adhesive and a plurality of conductive particles; and a pure graphite layer formed on the conducting adhesion layer and structurally corresponding to the flow field structure of the metal substrate. The graphite layer including expanded graphite powder is adhered to the metal substrate via the conducting adhesion layer, and a portion of the expanded graphite powder is embedded into the conducting adhesion layer.

A solid oxide fuel cell having an electric power generating element unit that is configured by sandwiching a solid electrolyte layer between a fuel electrode layer and an oxygen electrode layer with a pore that is present in the solid electrolyte layer and is covered with a sealing material. In addition, a pore that is present in an interconnector, which is electrically connected to the fuel electrode layer or the oxygen electrode layer, is covered with the sealing material. Consequently, the solid oxide fuel cell is capable of easily preventing gas leakage.

A solid oxide fuel cell having an electric power generating element unit that is configured by sandwiching a solid electrolyte layer between a fuel electrode layer and an oxygen electrode layer with a pore that is present in the solid electrolyte layer and is covered with a sealing material. In addition, a pore that is present in an interconnector, which is electrically connected to the fuel electrode layer or the oxygen electrode layer, is covered with the sealing material. Consequently, the solid oxide fuel cell is capable of easily preventing gas leakage.

A fuel cell stack is provided comprising membrane electrode assemblies and bipolar plates for supplying the membrane electrode assemblies with operating media and coolant, wherein a first bipolar plate comprises flow pathways having path depths that are different from path depths of corresponding flow pathways of a second bipolar plate. Moreover, a vehicle with a fuel cell system having such a fuel cell stack is provided.