Article
Green & Sustainable Science & Technology
Priyakant Pushkar, Arvind Kumar Mungray
Summary: The study showed that sediment height, anode size, and chamber volume can impact the diffusion impedance and power density in benthic microbial fuel cells (BMFCs), suggesting practical implications for improving energy generation efficiency. Microbial consortia were found to play a crucial role in mass transport phenomena and electrochemical diffusion in BMFCs.
SUSTAINABLE ENERGY TECHNOLOGIES AND ASSESSMENTS
(2021)
Article
Electrochemistry
Andrei Kulikovsky
Summary: This study uses a recent analytical model to analyze the impedance of PEM fuel cells. The results show that the resistivity of the peaks is affected by variations in oxygen transport parameters.
ELECTROCHIMICA ACTA
(2022)
Editorial Material
Electrochemistry
Andrei Kulikovsky
Summary: Pressure perturbation applied at the cathode channel of a PEM fuel cell leads to oscillating cell potential and current. Experimental spectra reported so far have shown that the measured voltage response under fixed total current is generally not reproducible, possibly due to random fluctuations of local current.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2022)
Article
Chemistry, Analytical
Andrei Kulikovsky
Summary: An analytical model for the concentration/pressure impedance on the cathode side of a PEM fuel cell has been developed, with analytical solution derived for the zeta impedance. Simple equations for the static point of zeta impedance have been obtained, allowing estimation of oxygen transport coefficients. The qualitative resemblance between the model and experimental zeta-spectrum has been demonstrated.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2021)
Article
Electrochemistry
Andrei Kulikovsky
Summary: A novel method is developed to calculate the cathode impedance of a PEM fuel cell based on charge and mass conservation equations. The cathode catalyst layer is divided into multiple sub-layers, and the steady-state variables within the sub-layers are assumed to be constant. By linearizing and Fourier-transforming the equations, analytical solutions for the overpotential and oxygen concentration perturbations are obtained for each sub-layer. Recurrent formulas are derived to express the perturbation amplitudes on one side of the sub-layer in terms of the values on the other side. By applying the recurrent relations multiple times from the CCL/GDL interface to the membrane surface, the system impedance can be obtained. The method shows high accuracy and tenfold acceleration in impedance spectrum calculations even with only 10 sub-layers and can be applied at arbitrary cell current.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2023)
Article
Electrochemistry
Felix Haimerl, Jarek P. Sabawa, Tuan A. Dao, Aliaksandr S. Bandarenka
Summary: Fuel cell electric vehicles have the potential to provide emission-free mobility, but further commercialization requires a deep understanding of degradation mechanisms. This study investigates the spatial distributions of key parameters in automotive-size fuel cells, revealing mass transport problems and proton resistance variations. The findings bridge the gap between simulation and experiment, providing valuable insights for fuel cell design and operating strategies.
Article
Chemistry, Physical
Tunahan Gunduz, Tolga Demircan
Summary: A numerical analysis was conducted to investigate the effects of current collector plate geometry on the performance of a cylindrical PEM fuel cell. The results showed that using helix flow channels in the current collector plate geometry can increase the flow density and current density of the fuel cell, and the power density also increases with the operating pressure.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Mathematics, Interdisciplinary Applications
Riccardo Caponetto, Fabio Matera, Emanuele Murgano, Emanuela Privitera, Maria Gabriella Xibilia
Summary: This paper presents the identification of a Fractional-Order Transfer Function (FOTF) to represent the behavior of a Fuel Cell (FC) in a set of working points using a data-driven approach. A genetic algorithm was used to determine the parameters that best fit the input data in each working point, and a method was proposed to select a single set of parameters to represent the system behavior in all considered working conditions. Comparisons with an equivalent circuit model from the literature showed the advantages of the proposed approach.
FRACTAL AND FRACTIONAL
(2021)
Article
Electrochemistry
Majid Shateri, Farschad Torabi
Summary: The accumulation of liquid water in dead-end mode operation of a PEM fuel cell decreases its performance. A new analytical model is proposed to investigate the effect of liquid water accumulation on the impedance of the fuel cell.
ELECTROCHIMICA ACTA
(2023)
Article
Chemistry, Physical
Zhifeng Xia, Huicui Chen, Ruirui Zhang, Lebin Chu, Tong Zhang, Pucheng Pei
Summary: This paper assembles three single PEM fuel cells with different cathode flow field plates and evaluates their output performance, economic characteristics, and durability. The mechanism behind the performance variation under different humidity conditions is also analyzed.
JOURNAL OF POWER SOURCES
(2022)
Article
Chemistry, Physical
K. Cwieka, A. Lysik, T. Wejrzanowski, T. Norby, W. Xing
Summary: This paper demonstrates the influence of modifications in microstructure and chemical composition on the electrochemical behavior of cathodes for molten carbonate fuel cells (MCFCs). By designing new three-layer cathode structures, combining porous silver, nickel oxide, and nickel foam layers, it is possible to enhance cell performance, decrease internal resistance, and improve charge transfer and mass transport efficiency.
JOURNAL OF POWER SOURCES
(2021)
Article
Green & Sustainable Science & Technology
Roma Agrahari, Radha Rani
Summary: A litre-scale multi-modular microbial fuel cell was operated using exo-electrogenic inoculum enriched from cow-dung for 45 days in batch mode, under three different circuit connections. Electrochemical analysis showed that the individual circuit had the highest power output and the lowest internal resistance. Additionally, the study reported COD removal rate and columbic efficiency of the MFC.
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Chemistry, Physical
Anantrao Vijay Shirsath, Caroline Bonnet, Stephane Rael, Francois Lapicque
Summary: Electrochemical pressure impedance spectroscopy (EPIS) is used to differentiate gas and liquid transport/transfer phenomena in electrochemical cells. This study investigates EPIS impedance in a membrane fuel cell under predominant gas transport control, with little presence of liquid water. Results show that operating the fuel cell with pure oxygen allows observation of gas convection, while oxygen dilution leads to diffusion phenomena. The presence of liquid water and poor management of it worsen gas transport situation in the porous layers.
JOURNAL OF POWER SOURCES
(2022)
Article
Electrochemistry
Andrei Kulikovsky
Summary: The impedance of oxygen transport in two porous layers A and B positioned between the air channel and cathode catalyst layer in a PEM fuel cell cannot be separated into individual layer impedances. The two-layer system functions as a unified oxygen transport media.
ELECTROCHEMISTRY COMMUNICATIONS
(2022)
Article
Energy & Fuels
Armin Abdollahipour, Hoseyn Sayyaadi
Summary: This study presents an electrochemical cooling system based on a continuous thermally regenerative electrochemical refrigerator cycle. The performance of the system was investigated through numerical simulations of the proton exchange membrane fuel cell (PEMFC) and proton exchange membrane electrolyzer cell (PEMEC). The effects of operating temperature and pressure on the system performance were also examined. The results showed that increasing the temperature of PEMEC improves the coefficient of performance (COP) and cooling capacity of the system while reducing the power consumption. Conversely, increasing the temperature of PEMFC has the opposite effect. Higher operating pressure increases the COP but decreases cooling capacity and power consumption. The COP to Carnot COP of the system is in the range of 0.017-0.067. Compared with other cooling technologies, this electrochemical cooling system shows promising potential, especially considering the expected improvements in efficiency and cost of PEMFCs and PEMECs.
Article
Electrochemistry
Mohammad Zarei Jelyani, Sahar Rashid-Nadimi, Saeed Asghari
JOURNAL OF SOLID STATE ELECTROCHEMISTRY
(2017)
Article
Chemistry, Physical
Roza Kolandooz, Saeed Asghari, Sahar Rashid-Nadimi, Amir Amirfazli
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2017)
Article
Energy & Fuels
Sajedeh Nasr Esfahani, Saeed Asghari, Sahar Rashid-Nadimi
Article
Thermodynamics
Amir Amirfazli, Saeed Asghari, Mohammad Sarraf
Article
Energy & Fuels
Amir Hossein Ahmaditaba, Ebrahim Afshari, Saeed Asghari
ENERGY SOURCES PART A-RECOVERY UTILIZATION AND ENVIRONMENTAL EFFECTS
(2018)
Article
Energy & Fuels
Yuhao Huang, Binh Thanh Tran, Saeed Asghari, Hoang-do Nguyen, Xiongbin Peng, Akhil Garg, My Loan Phung Le
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2018)
Article
Energy & Fuels
Yuhao Huang, Li Shui, Saeed Asghari, Paweena Prapainainar, Akhil Garg, Pankaj Kalita
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2018)
Article
Chemistry, Physical
Yuhao Huang, Akhil Garg, Saeed Asghari, Xiongbin Peng, My Loan Phung Le
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2018)
Article
Engineering, Environmental
Liu Yun, Duy Linh, Li Shui, Xiongbin Peng, Akhil Garg, My Loan L. E. Phung, Saeed Asghari, Jayne Sandoval
RESOURCES CONSERVATION AND RECYCLING
(2018)
Article
Thermodynamics
H. Mesforoush, M. R. Pakmanesh, H. Esfandiary, S. Asghari, E. Baniasadi
Article
Thermodynamics
Isar Dashti, Saeed Asghari, Mohammad Goudarzi, Quentin Meyer, Arjomand Mehrabani-Zeinabad, Dan J. L. Brett
Article
Energy & Fuels
N. Baharlou Houreh, E. Afshari, H. Shokouhmand, S. Asghari
JOURNAL OF ENERGY STORAGE
(2020)
Article
Chemistry, Physical
Ali Khanafari, Aria Alasty, Mohammad Jafar Kermani, Saeed Asghari
Summary: This study proposes an algorithm for diagnosing moisture content issues in polymer electrolyte membrane fuel cells. The algorithm compares experimental and model outputs to determine flooding, dehydration, or normal status, and can diagnose over 50% of PEMFC faults in commercial applications.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Thermodynamics
Samira Parand, Masoud Ziaei-Rad, Saeed Asghari
Summary: This study investigates the flow and heat transfer of nanofluid in a capillary-grooved heat pipe through numerical simulation and experimental measurements. The numerical results are compared with the experimental results, showing an average difference of 12% which is acceptable for phase change processes. It is found that water has better thermal performance than acetone in the grooved heat pipe. The use of nanofluid with 1% volume fraction significantly reduces the wall temperature and the temperature difference between evaporator and condenser, resulting in improved thermal performance of the heat pipe.
THERMAL SCIENCE AND ENGINEERING PROGRESS
(2023)
Article
Thermodynamics
Kamran Kianfar, Shokofeh Joodaki, Isar Dashti, Saeed Asghari
Summary: This study evaluates and measures the lifetime of heat pipes in space applications using different prediction methods. By combining various approaches, the failure time for the heat pipes is estimated to be between 12 and 60 years, in line with relevant standards.
THERMAL SCIENCE AND ENGINEERING PROGRESS
(2021)
