The invention relates to a single corrugated fuel cell and a cell stack. The single cell comprises an anode plate, a cathode plate, and a membrane electrode assembly; the anode plate is of a corrugated structure and a plurality of anode channels and anode ribs are arranged on the anode plate in parallel; the cathode plate is of a corrugated structure engaged with the anode plate and a plurality of cathode channels and cathode ribs are arranged on the cathode plate in parallel; the membrane electrode assembly is arranged between the anode plate and the cathode plate. The single cell presents a corrugated structure in a width direction of the channel. A plurality of single cells are stacked in sequence to form a fuel cell stack. Compared with the prior art, the invention significantly increases the reaction area per unit volume of the fuel cell through the corrugated structural design, thereby improving the power density of the fuel cell. In addition, the present invention has little change to the existing processing and manufacturing technology, and thus has high production feasibility.

A proton exchange membrane fuel cell bipolar plate (PEM FC BPP) assembly is provided. The PEM FC BPP assembly includes a cathode plate, an anode plate, and an insert. The insert is positioned between the cathode plate, an anode plate; and is comprised of a metal, a composite, a foil, a mesh, or a combination thereof, the insert includes at least one corrugated structure having peaks provided from 1-10 mm apart. The at least one corrugated structure is bonded to the anode and cathode plates at, at least one of its peaks and troughs. The disclosure also includes an electric device which includes the PEM FC BPP with cooling insert and where the electric device includes an electric vertical take-off and landing (eVTOL) aircraft.

A proton exchange membrane fuel cell bipolar plate (PEM FC BPP) assembly is provided. The PEM FC BPP assembly includes a cathode plate, an anode plate, and an insert. The insert is positioned between the cathode plate, an anode plate; and is comprised of a metal, a composite, a foil, a mesh, or a combination thereof, the insert includes at least one corrugated structure having peaks provided from 1-10 mm apart. The at least one corrugated structure is bonded to the anode and cathode plates at, at least one of its peaks and troughs. The disclosure also includes an electric device which includes the PEM FC BPP with cooling insert and where the electric device includes an electric vertical take-off and landing (eVTOL) aircraft.

A flow battery includes a first conductive plate and a second conductive plate. Each of the first and second conductive plates has an undulating surface formed with a first plurality of undulations which extend along a first axis of the conductive plate. and a second plurality of undulations which extend along a second, perpendicular axis of the conductive plate. The first and second conductive plates are arranged to form a first cell of the flow battery in which the respective undulating surfaces of the first and second conductive plates provide a cathode and a corresponding anode of the first cell, and define opposing walls of an electrolyte flow channel between the first and second conductive plates.