Redox flow devices are described including a positive electrode current collector, a negative electrode current collector, and an ion-permeable membrane separating said positive and negative current collectors, positioned and arranged to define a positive electroactive zone and a negative electroactive zone; wherein at least one of said positive and negative electroactive zone comprises a flowable semi-solid composition comprising ion storage compound particles capable of taking up or releasing said ions during operation of the cell, and wherein the ion storage compound particles have a polydisperse size distribution in which the finest particles present in at least 5 vol % of the total volume, is at least a factor of 5 smaller than the largest particles present in at least 5 vol % of the total volume.

The present disclosure relates to an acid-base polymer blend membrane comprising at least one first polymer exhibiting acidic groups (A) and at least one second polymer exhibiting basic groups (B), wherein the molar ratio of acidic groups A / basic groups B in the acid-base polymer blend membrane is at least 1 / 0.25. Furthermore, the present disclosure relates to a cell membrane comprising a support structure and an acid-base polymer blend membrane, wherein the acid-base polymer blend membrane is impregnated on the support structure. Said cell membrane can be used in an electrodialysis cell, in a fuel cell, in a PEM electrolyzer, or in a redox flow battery, preferably in a redox flow battery.

The present disclosure relates to an acid-base polymer blend membrane comprising at least one first polymer exhibiting acidic groups (A) and at least one second polymer exhibiting basic groups (B), wherein the molar ratio of acidic groups A / basic groups B in the acid-base polymer blend membrane is at least 1 / 0.25. Furthermore, the present disclosure relates to a cell membrane comprising a support structure and an acid-base polymer blend membrane, wherein the acid-base polymer blend membrane is impregnated on the support structure. Said cell membrane can be used in an electrodialysis cell, in a fuel cell, in a PEM electrolyzer, or in a redox flow battery, preferably in a redox flow battery.

A fuel cell separator which is obtained by molding a composition that contains a carbonaceous material and a resin, and which is provided with a sealing part and a groove that serves as a gas flow channel on one surface or both surfaces. This fuel cell separator is configured such that the arithmetic mean heights Sa of the surface of the sealing part and the bottom surface and the peak of the groove on at least one surface are 0.50-1.60 μm and the profile peak heights Spk thereof are 1.50 μm or less as determined in accordance with ISO 25178-2 (2012). Consequently, this fuel cell separator has good hydrophilicity and good adhesion to a gasket.

A fuel cell separator which is obtained by molding a composition that contains a carbonaceous material and a resin, and which is provided with a sealing part and a groove that serves as a gas flow channel on one surface or both surfaces. This fuel cell separator is configured such that the arithmetic mean heights Sa of the surface of the sealing part and the bottom surface and the peak of the groove on at least one surface are 0.50-1.60 μm and the profile peak heights Spk thereof are 1.50 μm or less as determined in accordance with ISO 25178-2 (2012). Consequently, this fuel cell separator has good hydrophilicity and good adhesion to a gasket.

The present invention is directed to a fuel cell separator 1 Included in a fuel cell, and the fuel cell separator 1 includes: a substrate 11 made of stainless steel; a middle portion 30 including a power generating portion; and an outer peripheral portion 20 including a non-power generating portion. The middle portion 30 includes a dissimilar metal layer 12 different from the stainless steel included in the substrate on the substrate, and a carbon layer 13 provided on the dissimilar metal layer 12, and the outer peripheral portion 20 Includes a portion including the dissimilar metal layer 12, the carbon layer 13, and a resin layer 14 on the carbon layer, and a portion not including the dissimilar metal layer 12 or the carbon layer 13, and including the resin layer 14 on the substrate.

The present invention is directed to a fuel cell separator 1 Included in a fuel cell, and the fuel cell separator 1 includes: a substrate 11 made of stainless steel; a middle portion 30 including a power generating portion; and an outer peripheral portion 20 including a non-power generating portion. The middle portion 30 includes a dissimilar metal layer 12 different from the stainless steel included in the substrate on the substrate, and a carbon layer 13 provided on the dissimilar metal layer 12, and the outer peripheral portion 20 Includes a portion including the dissimilar metal layer 12, the carbon layer 13, and a resin layer 14 on the carbon layer, and a portion not including the dissimilar metal layer 12 or the carbon layer 13, and including the resin layer 14 on the substrate.

A proton conducting film includes a polymer having a first part and a second part which are connected by a covalent bond and a plasticizer. The first parts aggregate with each other to form a domain at an operation temperature of the proton conducting film, and the second part crosslinks the domains. The second part has a proton accepting group, and the plasticizer contains a proton donating compound having a pKa of 2.5 or less, and thus the plasticizer penetrates into the second part, and a glass transition temperature of the polymer is lowered compared to when the plasticizer is not included.

A resin composition for fabricating a separator which is easy to control viscosity, a method of preparing the same, and a battery including the same, are disclosed.

A resin composition for fabricating a separator which is easy to control viscosity, a method of preparing the same, and a battery including the same, are disclosed.