摘要:
A transition metal based ceramic material having the general formula Li&agr;M1−&bgr;T&bgr;NxO67, wherein M is a transition metal, T is a dopant metal, and wherein x is greater than 0 and less than or equal to l, &dgr; is 0, or less than or equal to 4; &agr; is less than or equal to 3−x, and &bgr; is less than 1 is disclosed. The ceramic material has utility as a cathode material for rechargeable lithium batteries.
摘要:
A multiphase material comprises a ceramic matrix material having one or more of Sn, Sb, Bi, Pb, Ag, In, Si and Ge nanodispersed in the matrix. The ceramic matrix is preferably based upon carbides, nitrides and oxides of group IV-VI transition metals taken singly or in combination.
摘要:
A fuel cell that includes a blocking agent for preventing hydrogen and air from contacting bare membrane. This in turn prevents the reaction of air and hydrogen gases at outside edges of the catalyst layers. The blocking agent is deposited within diffusion media layers on one or both of the anode and cathode sides of the fuel cell. The blocking agent extends into the diffusion media layers far enough so that it is within outside edges of the catalyst layers. In one embodiment, the blocking agent is a thermoplastic polymer, such as PVDF, that flows into the diffusion media layers in a melted format, where it hardens.
摘要:
A method of manufacturing a fuel cell membrane electrode assembly comprising forming and compressing a stack having a plurality of layers in a desired orientation. The layers comprise a membrane, a cathode, an anode, and at least one edge protection layer. The method includes providing at least one mechanical reinforcing layer adjacent the anode or cathode layer, and allowing the electrodes to relax under high heat to remove stress prior to lamination.