Voltage Reduction Technique for Use With Electrochemical Impedance Spectroscopy in High-Voltage Fuel Cell and Battery Systems

Homayouni, Hooman; DeVaal, Jake; Golnaraghi, Farid; Wang, Jiacheng

doi:10.1109/tte.2018.2806090

Cited by 16 publications

(5 citation statements)

References 36 publications

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“…The EIS measurements and polarization curves of the PS/I RFB cell shown in Figures and , respectively, demonstrate that the flow rate, magnetic field intensity, and nanoparticle concentrations affect the electrochemical characteristics of the battery; by implication, the structure and properties of the MFE are affected by these control parameters. The left arc in the EIS Nyquist plots is attributed to the summation of charge-transfer resistances at both positive and negative electrodes, and the right arc is attributed to the mass-transfer resistances, as illustrated in Figure a. , The effect of the concentration of MMWCNTs used to prepare the MFE is shown in Figure b. It was found that, at a low MMWCNT concentration (1 g L –1 ), the ohmic resistance of the MFE is larger than that for the carbon felt.…”

Section: Resultsmentioning

confidence: 94%

Novel Magnetic Flowable Electrode for Redox Flow Batteries: A Polysulfide/Iodide Case Study

Rahimi

Dehkordi

Gharibi

et al. 2021

Ind. Eng. Chem. Res.

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A novel approach named a magnetic flowable electrode (MFE) is proposed for the first time to enable enhancement of redox flow batteries (RFBs) performance. This approach enables the formation of a high active surface area electrode from magnetic nanomaterials, without the need to fabricate a self-supporting threedimensional electrode structure. To form a simple MFE, magnetic modified carbon nanotubes are dispersed in the electrolyte, and permanent magnets are embedded behind the current feeder to apply a magnetic field across the flow cell channels. With circulating electrolyte, magnetic carbon nanotubes are aggregated on the graphite bipolar plate to form a well-structured nanoscale percolating network and chains serving as an electrode. The superior electrochemical activity and stability of the MFE approach is demonstrated successfully relative to a conventional stationary carbon felt electrode using the positive electrode of a polysulfide-iodide RFB. The MFE provides high electrochemical active surface area and porosity, which result in lower cell impedances and pump losses, and higher battery efficiencies. The polysulfide-iodide RFB using an MFE gives stable cycling performance over 200 cycles (with replacement of the electrolyte after 100 cycles) and delivers a high energy efficiency of 79.3% at a current density of 20 mA cm −2 , which is larger than all previous reports for this RFB system. The MFE design opens new opportunities to develop the next-generation RFB systems and can be applied in various flow battery chemistries.

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Section: Resultsmentioning

confidence: 94%

Novel Magnetic Flowable Electrode for Redox Flow Batteries: A Polysulfide/Iodide Case Study

Rahimi

Dehkordi

Gharibi

et al. 2021

Ind. Eng. Chem. Res.

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“…Pressure of oxygen (Pa) P Modern public transportation sectors rely highly on hydrocarbon fuels, giving rise to enormous energy costs and a fair amount of carbon dioxide emissions [1], [2]. Hence recent years have seen the increasing trend for automobile manufacturers to develop the advanced energy storage techniques into the hybrid electric bus (HEB) [3]- [6], which is regarded as an appropriate substitute for conventional vehicles.…”

Section: Acapmentioning

confidence: 99%

“…The nonlinear term can be obtained from the following equations: Rbt (1) Rbt (1) UDC Rbt (0) Rbt (0) Cbt (1) Cbt ( (2) Rbt (2) Cbt (2) Cbt (2) Boost Converter where I HF C is fuel-cell current, the P H2 , P O2 , and P H2O are the pressure of hydrogen gas, oxygen and water. Ψ gas constant multiplied by temperature, and F stands for Faraday constant.…”

Section: A Electrical Domainmentioning

confidence: 99%

Supervisory Real-Time Multidomain Modeling and Hardware Emulation of Fuel-Cell Hybrid Electric Bus Behavioral Transients

Lyu

Dinavahi

2022

IEEE Access

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Real-time device-level multi-domain emulation can provide an accurate insight into behavioral transients of the hydrogen fuel-cell hybrid electric bus (HEB). However, the conventional electromagnetic transient (EMT) simulation suffers from the computation burden caused by the complex multi-domain subsystems. This paper develops a hybrid recurrent neural network (RNN) and EMT method for device-level multidomain emulation for fuel-cell and battery HEB. Two recurrent neural networks (RNN) are designed and trained to create device-level models of permanent magnet synchronous motor (PMSM) and the modular multilevel converter (MMC), respectively. The IGBTs' behavioral transients and thermal performance are integrated into the RNN-based MMC model. Moreover, the EMT models represent the energy behaviour of onboard fuel-cell stacks and battery stacks. The proposed multi-domain hybrid models are implemented on the Xilinx Versal™ adaptive compute acceleration platform (ACAP), where multiple AI engines and the programmable logic deal with the RNN and EMT models, respectively. The real-time hardware emulation is carried out at the time-step of 0.1 µs for device-level transients. The results show that the hybrid model has 96.3% accuracy; furthermore, it significantly reduces the HEB emulation time compared to conventional EMT methods.

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“…PEMFCs are a type of fuel cell that uses a polymer electrolyte membrane to conduct protons from the anode to the cathode. Proton exchange membrane fuel cells (PEMFCs) have a high power density, low operating temperature, and are ideal for portable and transportation applications [11], [12]. In the recent advances in PEMFCs, including the development of new materials, membrane electrode assemblies, and catalysts, and their impact on the performance of PEMFCs.…”

Section: Introductionmentioning

confidence: 99%

A comprehensive review on different types of fuel cell and its applications

Ramasamy,

Muruganantham,

Rajasekaran

et al. 2024

Bulletin EEI

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This review article provides an overview of various types of fuel cells that are currently being researched and developed. Fuel cells are electrochemical devices that convert chemical energy directly into electrical energy, making them a promising technology for clean and efficient energy production. The review covers the principles of operation and key characteristics of proton exchange membrane fuel cells (PEMFCs), solid oxide fuel cells (SOFCs), alkaline fuel cells (AFCs), direct methanol fuel cells (DMFCs), and microbial fuel cells (MFCs). The article also discusses the advantages and limitations of each type of fuel cell, as well as the current research and development efforts aimed at improving their performance and reducing their costs. Overall, this review provides a comprehensive understanding of the various types of fuel cells and their potential applications in the field of energy production.

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Voltage Reduction Technique for Use With Electrochemical Impedance Spectroscopy in High-Voltage Fuel Cell and Battery Systems

Cited by 16 publications

References 36 publications

Novel Magnetic Flowable Electrode for Redox Flow Batteries: A Polysulfide/Iodide Case Study

Novel Magnetic Flowable Electrode for Redox Flow Batteries: A Polysulfide/Iodide Case Study

Supervisory Real-Time Multidomain Modeling and Hardware Emulation of Fuel-Cell Hybrid Electric Bus Behavioral Transients

A comprehensive review on different types of fuel cell and its applications

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