Suspensions for use as fuel for electrochemical fuel cells

Details Suspensions for use as fuel for electrochemical fuel cells Suspensions for use as fuel for electrochemical fuel cells

C - Chemistry, Metallurgy

10

L

C10L 1/12 (2006.01) C10L 1/10 (2006.01) C10L 1/18 (2006.01) H01M 8/08 (2006.01)

Patent

CA 2492362

A fuel composition for fuel cells includes a polar solvent such as water, a first portion of a first fuel dissolved in the solvent at a saturated concentration, and a second portion of the first fuel suspended in the solvent to serve as a reservoir of fuel as the dissolved portion is consumed. Preferably, the first fuel is a hybride such as NaBH4. Optionally, the fuel composition also includes a second fuel such as an alcohol that controls the solubility of the first fuel in the solvent, inhibits decomposition of first fuel and stabilizes the suspension. Preferably, the fuel composition also includes an additive such as alkali for stabilizing the first fuel.

L'invention concerne une composition de combustible conçue pour des piles à combustible. Cette composition comprend un solvant polaire tel que de l'eau, une première fraction d'un premier combustible qui est dissoute dans ledit solvant de façon que la concentration de saturation soit atteinte, ainsi qu'une seconde fraction dudit premier combustible qui est en suspension dans le solvant, cette seconde fraction servant de réserve de combustible lorsque la fraction dissoute est consommée. De préférence, le premier combustible se présente sous la forme d'un hybride de type NaBH¿4?. La composition de combustible contient éventuellement un second combustible tel qu'un alcool, qui régule en outre la solubilité du premier combustible dans le solvant, inhibe la décomposition de ce premier combustible et stabilise la suspension. De préférence, la composition de combustible comprend également un additif tel qu'un alcali pour stabiliser le premier combustible.

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