초록 ▼

The invention provides a method for preparing subassemblies for an electrochemical cell or a stack of electrochemical cells, particularly a stack of fuel cells for the direct generation of electricity. The method includes bonding together two or more electrochemical cell components, such as plates,

The invention provides a method for preparing subassemblies for an electrochemical cell or a stack of electrochemical cells, particularly a stack of fuel cells for the direct generation of electricity. The method includes bonding together two or more electrochemical cell components, such as plates, frames, flow fields, shims, gaskets, membranes and the like, to form subassemblies used to make an electrochemical cell stack. The bonding can be accomplished using either polymeric bonds (i.e., adhesives) where polymer and/or metal components are involved or metallurgical bonds (i.e., solder) where metal components are involved. The bonding provides tightly sealed cells and lower electronic contact resistances between components.

대표청구항 ▼

The invention provides a method for preparing subassemblies for an electrochemical cell or a stack of electrochemical cells, particularly a stack of fuel cells for the direct generation of electricity. The method includes bonding together two or more electrochemical cell components, such as plates,

The invention provides a method for preparing subassemblies for an electrochemical cell or a stack of electrochemical cells, particularly a stack of fuel cells for the direct generation of electricity. The method includes bonding together two or more electrochemical cell components, such as plates, frames, flow fields, shims, gaskets, membranes and the like, to form subassemblies used to make an electrochemical cell stack. The bonding can be accomplished using either polymeric bonds (i.e., adhesives) where polymer and/or metal components are involved or metallurgical bonds (i.e., solder) where metal components are involved. The bonding provides tightly sealed cells and lower electronic contact resistances between components. a liquid crystalline compound which is expressed by the following formula (B) R1: alkyl group with 1 to 10 carbons or alkenyl group with 2 to 10 carbons A: single bond or 1, 4-cyclohexylene group X: --F, --C1 or --CN Y, Z: --F or --H. 7. The liquid crystal display according to claim 6, wherein the driving method executed by the driving section comprises, in the selection step, before and after the application of the selection pulse, a time of applying substantially zero volts to the liquid crystal composition. 8. The liquid crystal display according to claim 6, wherein the chiral agent is contained in a range from 10 wt % to 40 wt % of the chiral nematic liquid crystal composition. 9. The liquid crystal display according to claim 6, wherein the liquid crystal composition further contains a coloring agent. 10. The liquid crystal display according to claim 6, wherein the liquid crystal composition further contains an ultraviolet-ray absorber. 11.