### Abstract

In this study, an over potential analysis was performed on a solid acid fuel cell using anhydrous membrane CsH_{2}PO_{4} in order to investigate the produced losses. The voltage losses were analyzed into three main parts, activation, concentration and ohmic. The used equations were chosen semi-empirical equations (exchange current density), mathematical and material balance equations. Cesium dihydrogen phosphate (CsH_{2}PO_{4}) was used as anhydrous membrane and the proton conductivity was calculated based on the Arrhenius law. The combination of semi-empirical equations, mathematical and Nernst equation were used to represent a model for the formulation voltage versus current density regarding the over potentials. By considering the power differentiation to current density, a non-linear equation was used in order to determine optimum current and voltage via Matlab Fsolve nonlinear program. The exergy as energy quality can be estimated using the over potentials. The enthalpy and the entropy were calculated using a polynomial equation via JANAF data. Hydrogen with a small fraction of water vapor and air were selected as a fuel. In addition, a parametric study was also conducted to examine the effects of various operating conditions, such as temperature, fuel flow rate and catalyst layer thickness on the exergy and the energy efficiency of the system. The effects of pressure, temperature and catalyst layer thickness on the current and voltage were investigated. The results showed that superior protonic conductivity and stability can be obtained at 240 °C. The effects of the decreasing catalyst layer thickness and increasing the pressure indicated the improvement in the current density. The increasing catalyst quality showed more efficient than changing both parameters.

Original language | English |
---|---|

Pages (from-to) | 123-132 |

Number of pages | 10 |

Journal | World Journal of Modelling and Simulation |

Volume | 7 |

Issue number | 2 |

Publication status | Published - 2011 |

### Fingerprint

### Keywords

- Cesium dihydrogen phosphate
- Exergy
- Over potential
- Solid acid fuel cell

### ASJC Scopus subject areas

- Modelling and Simulation
- Engineering(all)

### Cite this

_{2}PO

_{4}as anhydrous membrane.

*World Journal of Modelling and Simulation*,

*7*(2), 123-132.

**Overpotentials analysis in solid acid fuel cell using CsH _{2}PO_{4} as anhydrous membrane.** / Hosseini, Soraya; Wan Daud, Wan Ramli; Malakbalaa, Mohamad Rasool; Masoudi Soltani, Salman; Zolfagharei, Reza.

Research output: Contribution to journal › Article

_{2}PO

_{4}as anhydrous membrane',

*World Journal of Modelling and Simulation*, vol. 7, no. 2, pp. 123-132.

_{2}PO

_{4}as anhydrous membrane. World Journal of Modelling and Simulation. 2011;7(2):123-132.

}

TY - JOUR

T1 - Overpotentials analysis in solid acid fuel cell using CsH2PO4 as anhydrous membrane

AU - Hosseini, Soraya

AU - Wan Daud, Wan Ramli

AU - Malakbalaa, Mohamad Rasool

AU - Masoudi Soltani, Salman

AU - Zolfagharei, Reza

PY - 2011

Y1 - 2011

N2 - In this study, an over potential analysis was performed on a solid acid fuel cell using anhydrous membrane CsH2PO4 in order to investigate the produced losses. The voltage losses were analyzed into three main parts, activation, concentration and ohmic. The used equations were chosen semi-empirical equations (exchange current density), mathematical and material balance equations. Cesium dihydrogen phosphate (CsH2PO4) was used as anhydrous membrane and the proton conductivity was calculated based on the Arrhenius law. The combination of semi-empirical equations, mathematical and Nernst equation were used to represent a model for the formulation voltage versus current density regarding the over potentials. By considering the power differentiation to current density, a non-linear equation was used in order to determine optimum current and voltage via Matlab Fsolve nonlinear program. The exergy as energy quality can be estimated using the over potentials. The enthalpy and the entropy were calculated using a polynomial equation via JANAF data. Hydrogen with a small fraction of water vapor and air were selected as a fuel. In addition, a parametric study was also conducted to examine the effects of various operating conditions, such as temperature, fuel flow rate and catalyst layer thickness on the exergy and the energy efficiency of the system. The effects of pressure, temperature and catalyst layer thickness on the current and voltage were investigated. The results showed that superior protonic conductivity and stability can be obtained at 240 °C. The effects of the decreasing catalyst layer thickness and increasing the pressure indicated the improvement in the current density. The increasing catalyst quality showed more efficient than changing both parameters.

AB - In this study, an over potential analysis was performed on a solid acid fuel cell using anhydrous membrane CsH2PO4 in order to investigate the produced losses. The voltage losses were analyzed into three main parts, activation, concentration and ohmic. The used equations were chosen semi-empirical equations (exchange current density), mathematical and material balance equations. Cesium dihydrogen phosphate (CsH2PO4) was used as anhydrous membrane and the proton conductivity was calculated based on the Arrhenius law. The combination of semi-empirical equations, mathematical and Nernst equation were used to represent a model for the formulation voltage versus current density regarding the over potentials. By considering the power differentiation to current density, a non-linear equation was used in order to determine optimum current and voltage via Matlab Fsolve nonlinear program. The exergy as energy quality can be estimated using the over potentials. The enthalpy and the entropy were calculated using a polynomial equation via JANAF data. Hydrogen with a small fraction of water vapor and air were selected as a fuel. In addition, a parametric study was also conducted to examine the effects of various operating conditions, such as temperature, fuel flow rate and catalyst layer thickness on the exergy and the energy efficiency of the system. The effects of pressure, temperature and catalyst layer thickness on the current and voltage were investigated. The results showed that superior protonic conductivity and stability can be obtained at 240 °C. The effects of the decreasing catalyst layer thickness and increasing the pressure indicated the improvement in the current density. The increasing catalyst quality showed more efficient than changing both parameters.

KW - Cesium dihydrogen phosphate

KW - Exergy

KW - Over potential

KW - Solid acid fuel cell

UR - http://www.scopus.com/inward/record.url?scp=79960708473&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=79960708473&partnerID=8YFLogxK

M3 - Article

AN - SCOPUS:79960708473

VL - 7

SP - 123

EP - 132

JO - World Journal of Modelling and Simulation

JF - World Journal of Modelling and Simulation

SN - 1746-7233

IS - 2

ER -