Liquid methanol concentration sensors for direct methanol fuel cells

Simple and reliable model for estimation of methanol cross-over in direct methanolfuel cells and its application on methanol-concentration control

“…Using the extreme values found for the various terms in eqns (16), (17) and (18), the values fork m andk x and their standard deviations can be substituted as a function of temperature using the Arrhenius relationship (19).…”

“…19 Feedforward control does not require a measurement on methanol concentration, and allows the system to be more reliable, lightweight and cheaper.…”

The methanol adsorption behavior on platinum/poly(2,5-dimethoxyaniline) composites for application in methanol sensing

“…The linear increase with methanol makes Pt/PDMA a potential material for methanol sensing. In this study, the methanol concentration was limited to 3 M because the methanol feed concentration range was usually lower than 5 M [29][30][31][32]. The reason for low methanol concentration range is that the cell performance is dramatically reduced at the high methanol concentration due to the problem of methanol crossover.…”

Which type of fuel cell is more competitive for portable application: Direct methanol fuel cells or direct borohydride fuel cells?

“…A 246-ml cartridge filled with pure MeOH is needed for 10 h operation at a 20 W power output, compared with a 612-ml cartridge filled with 10% NaBH 4 -20% NaOH aqueous solution in the 8e-DBFC system. [59]. c Relative density of 10% NaBH 4 -20% NaOH solution = 1.19 [24].…”