| 摘要 |
The fuel concentration in the electrolyte of fuel cells that are operated with liquid fuel is determined. Specifically, the concentration of methanol in the electrolyte of direct methanol fuel cells can be measured. The capacitance of a capacitor is measured with the fuel/electrolyte mixture placed as a dielectric. The dielectric constant of the mixture is proportional to the measured capacitance and, upon determining the dielectric constant of the mixture, the fuel concentration in the mixture or in the electrolyte can be calculated.
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