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Coupled-inductor based diode assisted boost inverter for achieving high gain SCIE
期刊论文 | 2019 , 12 (3) , 410-420 | IET POWER ELECTRONICS
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Abstract :

A high-gain single-stage three-phase coupled-inductor diode-assisted boost inverter (CL-DABI) is presented for energy applications. A new scheme has been proposed which is simple, has less number of energy storage components and uses non-shoot-through pulse-width modulation (PWM) techniques such as sine-wave PWM and space vector modulation to get the maximum gain from a low-voltage dc source. During simulation and hardware implementation, it was observed that the SPWM method resulted in a lower conversion rate and higher device stress. To improve the shortcomings, extended sine-wave PWM (ESPWM) method is proposed to achieve high gain without compromising the conversion efficiency and putting devices under stress. Mathematical analysis, simulations results and experimental verifications are presented here. Hardware results prove the validity of the proposed CL-DABI with ESPWM by achieving high intermediate dc gain, excellent dc-ac coupling, less device stress, comparable power quality and smaller size.

Keyword :

high-gain three-phase CL-DABI simulations results higher device stress energy storage low-voltage dc source inductors energy storage components maximum gain single-stage three-phase coupled-inductor diode lower conversion rate energy applications PWM invertors SPWM method pulse-width modulation techniques mathematical analysis hardware implementation hardware results invertors high gain conversion efficiency excellent dc-ac coupling putting devices extended sine-wave PWM method simulation space vector modulation PWM power convertors switching convertors high intermediate dc gain

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GB/T 7714 Iqbal, Taosif , Lu, Haibin , Zaman, Shah et al. Coupled-inductor based diode assisted boost inverter for achieving high gain [J]. | IET POWER ELECTRONICS , 2019 , 12 (3) : 410-420 .
MLA Iqbal, Taosif et al. "Coupled-inductor based diode assisted boost inverter for achieving high gain" . | IET POWER ELECTRONICS 12 . 3 (2019) : 410-420 .
APA Iqbal, Taosif , Lu, Haibin , Zaman, Shah , Tan, Siew-Chong , Li, Guojun , Zhang, Xiongwen . Coupled-inductor based diode assisted boost inverter for achieving high gain . | IET POWER ELECTRONICS , 2019 , 12 (3) , 410-420 .
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Enhanced oxygen reduction reaction through Ca and Co Co-doped YFeO3 as cathode for protonic ceramic fuel cells EI SCIE
期刊论文 | 2019 , 413 , 148-157 | Journal of Power Sources
WoS CC Cited Count: 1
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Abstract :

Protonic ceramic fuel cells offer the potential for environmentally sustainable and cost-effective electric power generation. However, the power outputs of protonic ceramic fuel cells are far from the requirements due to the lack of active cathodes. In this work, porous thin sheets CaxY1-xFe0.5Co0.5O3-δ (x = 0.1, 0.3 and 0.5) are synthesized by a modified pechini method and investigated as cathode materials for protonic ceramic fuel cells. CaxY1-xFe0.5Co0.5O3-δ show high electrical conductivities and excellent chemical compatibility with Ba(Zr0.1Ce0.7Y0.2)O3 electrolyte. The maximum electrical conductivity of Ca0.3Y0.7Fe0.5Co0.5O3-δ reaches 202 S cm−1 in air at 750 °C. The detailed mechanism for oxygen reduction reaction reveals that the rate-limiting step of oxygen reduction reaction is transformed from charge transfer to O2 adsorption-dissociation with temperature rising or Ca doping. The composite cathode Ca0.3Y0.7Fe0.5Co0.5O3-δ-Ba(Zr0.1Ce0.7Y0.2)O3 presents a relatively low polarization resistance of 0.07 Ω cm2 at 750 °C in air. The power density of the anode-supported cell of NiO– Ba(Zr0.1Ce0.7Y0.2)O3∣Ba(Zr0.1Ce0.7Y0.2)O3∣Ca0.3Y0.7Fe0.5Co0.5O3-δ-Ba(Zr0.1Ce0.7Y0.2)O3 is 798 mW cm−2 as the electrolyte thickness is about 150 μm. The prepared CaxY1-xFe0.5Co0.5O3-δ oxides are promising candidates as high-performance cathodes for protonic ceramic fuel cells. © 2018 Elsevier B.V.

Keyword :

Anode supported cell Chemical compatibility Composite cathode Electrical conductivity High electrical conductivity Modified Pechini method Oxygen reduction reaction Polarization resistances

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GB/T 7714 Cui, Jiajia , Wang, Junkai , Zhang, Xiongwen et al. Enhanced oxygen reduction reaction through Ca and Co Co-doped YFeO3 as cathode for protonic ceramic fuel cells [J]. | Journal of Power Sources , 2019 , 413 : 148-157 .
MLA Cui, Jiajia et al. "Enhanced oxygen reduction reaction through Ca and Co Co-doped YFeO3 as cathode for protonic ceramic fuel cells" . | Journal of Power Sources 413 (2019) : 148-157 .
APA Cui, Jiajia , Wang, Junkai , Zhang, Xiongwen , Li, Guojun , Wu, Kai , Cheng, Yonghong et al. Enhanced oxygen reduction reaction through Ca and Co Co-doped YFeO3 as cathode for protonic ceramic fuel cells . | Journal of Power Sources , 2019 , 413 , 148-157 .
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Facile aqueous phase synthesis of Pd3Cu?B/C catalyst for enhanced glucose electrooxidation EI Scopus SCIE
期刊论文 | 2019 , 95 , 139-146 | Journal of the Taiwan Institute of Chemical Engineers
WoS CC Cited Count: 2 SCOPUS Cited Count: 2
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Abstract :

A novel Pd3Cu–B/C nanocatalyst is successfully synthesized via a simple aqueous phase approach and used as an anode catalyst for glucose electrooxidation reaction in fuel cell. Electrochemical characterization demonstrates that, in comparison with Pd3Cu/C and Pd/C, Pd3Cu–B/C nanocatalyst exhibits markedly improved electrocatalytic performance with larger electrochemical active surface area, higher activity and better stability. This significant improvement of electrocatalytic performance is due to the increased number of active sites, which comes from the electronic effect and strong interactions among Pd, Cu and B. We expect that both of the facile synthesis method and outstanding catalytic performance of Pd3Cu–B/C achieved in this study will open up new opportunities for direct glucose fuel cell application. © 2018 Taiwan Institute of Chemical Engineers

Keyword :

Aqueous-phase synthesis Catalytic performance Direct glucose fuel cell Electrocatalytic performance Electrochemical active surface areas Electrochemical characterizations Glucose electrooxidation Number of active sites

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GB/T 7714 Chai, Dan , Zhang, Xiongwen , Chan, Siew Hwa et al. Facile aqueous phase synthesis of Pd3Cu?B/C catalyst for enhanced glucose electrooxidation [J]. | Journal of the Taiwan Institute of Chemical Engineers , 2019 , 95 : 139-146 .
MLA Chai, Dan et al. "Facile aqueous phase synthesis of Pd3Cu?B/C catalyst for enhanced glucose electrooxidation" . | Journal of the Taiwan Institute of Chemical Engineers 95 (2019) : 139-146 .
APA Chai, Dan , Zhang, Xiongwen , Chan, Siew Hwa , Li, Guojun . Facile aqueous phase synthesis of Pd3Cu?B/C catalyst for enhanced glucose electrooxidation . | Journal of the Taiwan Institute of Chemical Engineers , 2019 , 95 , 139-146 .
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Facile Aqueous Phase Synthesis of Pd3Cu-B/C Nanocatalyst for Glucose Electrooxidation EI CPCI-S Scopus
会议论文 | 2018 , 301 | 5th Annual International Conference on Material Science and Environmental Engineering (MSEE)
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Abstract :

A novel Pd3Cu-B/C nanocatalyst was facilely synthesized through an aqueous phase process. And it was developed for use in the glucose electrooxidation reaction in fuel cells. Cyclic voltammetry shown that the electrochemical surface area of Pd3Cu-B/C is 2.25 times that of Pd/C. Glucose electrooxidation curves revealed that peak current on the Pd3Cu-B/C is actually 1.73 times of the Pd/C. This high performance of Pd3Cu-B/C could be ascribed to the synergistic effect between Pd, Cu and B.

Keyword :

Pd-based catalysts Fuel cells B-doped Glucose electrooxidation

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GB/T 7714 Chai, Dan , Lu, Haibin , Wang, Yaqian et al. Facile Aqueous Phase Synthesis of Pd3Cu-B/C Nanocatalyst for Glucose Electrooxidation [C] . 2018 .
MLA Chai, Dan et al. "Facile Aqueous Phase Synthesis of Pd3Cu-B/C Nanocatalyst for Glucose Electrooxidation" . (2018) .
APA Chai, Dan , Lu, Haibin , Wang, Yaqian , Hua, Xiuwen , Ren, Na , Zhang, Xiongwen . Facile Aqueous Phase Synthesis of Pd3Cu-B/C Nanocatalyst for Glucose Electrooxidation . (2018) .
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Numerical study on thermoelectric performance of cross-flow planar solid oxide fuel cell EI Scopus
会议论文 | 2018 | ASME 2018 12th International Conference on Energy Sustainability, ES 2018, collocated with the ASME 2018 Power Conference and the ASME 2018 Nuclear Forum
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Abstract :

This paper investigates the thermoelectric characteristics of cross-flow planar type solid oxide fuel cell (SOFC) with natural gas as fuel by using a three-dimensional numerical model. The results reveal that temperature and reactant concentration increase gradually along the direction of fuel gas flow, and the reactant concentration increases in the first and subsequently decreases. In addition, the lower the temperature, the higher ideal electromotive force is as well as the less actual output electromotive force. The hydrogen concentration is positively correlated with the current density and the ideal electromotive force. However, increasing the mass flow continuously beyond the reasonable range can decrease the current and electrochemical reaction intensity. Variation in wall thickness was also simulated and found that increasing the thickness would result in higher intensity of electrochemical reaction and increased current density but at the cost of low efficiency in SOFC. Thus an optimal design can make a balance between fuel utilization and output power of SOFC. © 2018 American Society of Mechanical Engineers. All rights reserved.

Keyword :

Electrochemical reactions Fuel utilization Hydrogen concentration Planar solid oxide fuel cells Reactant concentrations Thermoelectric characteristics Thermoelectric performance Three-dimensional numerical modeling

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GB/T 7714 Lu, Haibin , Xie, Changcheng , Hua, Xiuwen et al. Numerical study on thermoelectric performance of cross-flow planar solid oxide fuel cell [C] . 2018 .
MLA Lu, Haibin et al. "Numerical study on thermoelectric performance of cross-flow planar solid oxide fuel cell" . (2018) .
APA Lu, Haibin , Xie, Changcheng , Hua, Xiuwen , Iqbal, Taosif , Zhang, Xiongwen , Li, Guojun et al. Numerical study on thermoelectric performance of cross-flow planar solid oxide fuel cell . (2018) .
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NUMERICAL STUDY ON THERMOELECTRIC PERFORMANCE OF CROSS-FLOW PLANAR SOLID OXIDE FUEL CELL CPCI-S
会议论文 | 2018 | 12th ASME International Conference on Energy Sustainability
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Abstract :

This paper investigates the thermoelectric characteristics of cross-flow planar type solid oxide fuel cell (SOFC) with natural gas as fuel by using a three-dimensional numerical model. The results reveal that temperature and reactant concentration increase gradually along the direction of fuel gas flow, and the reactant concentration increases in the first and subsequently decreases. In addition, the lower the temperature, the higher ideal electromotive force is as well as the less actual output electromotive force. The hydrogen concentration is positively correlated with the current density and the ideal electromotive force. However, increasing the mass flow continuously beyond the reasonable range can decrease the current and electrochemical reaction intensity. Variation in wall thickness was also simulated and found that increasing the thickness would result in higher intensity of electrochemical reaction and increased current density but at the cost of low efficiency in SOFC. Thus an optimal design can make a balance between fuel utilization and output power of SOFC.

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GB/T 7714 Lu, Haibin , Xie, Changcheng , Hua, Xiuwen et al. NUMERICAL STUDY ON THERMOELECTRIC PERFORMANCE OF CROSS-FLOW PLANAR SOLID OXIDE FUEL CELL [C] . 2018 .
MLA Lu, Haibin et al. "NUMERICAL STUDY ON THERMOELECTRIC PERFORMANCE OF CROSS-FLOW PLANAR SOLID OXIDE FUEL CELL" . (2018) .
APA Lu, Haibin , Xie, Changcheng , Hua, Xiuwen , Lqbal, Taosif , Zhang, Xiongwen , Li, Guojun et al. NUMERICAL STUDY ON THERMOELECTRIC PERFORMANCE OF CROSS-FLOW PLANAR SOLID OXIDE FUEL CELL . (2018) .
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Molecular dynamics simulations of the coke formation progress on the nickel-based anode of solid oxide fuel cells EI SCIE Scopus
期刊论文 | 2018 , 91 , 40-47 | INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER
WoS CC Cited Count: 2 SCOPUS Cited Count: 2
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Abstract :

Coke formation on anode of solid oxide fuel cells (SOFC) can lead to SOFC performance degradation or even failure. This paper investigates transfer mechanism of carbon atoms in coke formation process on nickel-based anode using the reactive force field molecular dynamics simulation (ReaxFF-MD). The simulation results show that the transfer processes of carbon atoms in methane reforming are composed of three stages, and the alkyl makes formation of coke easier on the surface of Ni(100). The driving force of the carbon atoms diffusion into Ni (100) changes from the carbon concentration difference to the chemical potential difference, which leads to the generation of a new phase of carbon and the structural damage of the SOFC anode. The structural changes of Ni (100) during the carbon atom transport and precipitation are simulated and analyzed to reveal the chemical reaction mechanisms of coke formation, and provide theoretical foundation for optimal design in materials and operating parameters of SOFC anode.

Keyword :

Coke formation ReaxFF-MD Anode Solid oxide fuel cell

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GB/T 7714 Lu, Haibin , Hua, Dong , Iqabl, Taosif et al. Molecular dynamics simulations of the coke formation progress on the nickel-based anode of solid oxide fuel cells [J]. | INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER , 2018 , 91 : 40-47 .
MLA Lu, Haibin et al. "Molecular dynamics simulations of the coke formation progress on the nickel-based anode of solid oxide fuel cells" . | INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER 91 (2018) : 40-47 .
APA Lu, Haibin , Hua, Dong , Iqabl, Taosif , Zhang, Xiongwen , Li, Guojun , Zhang, Di . Molecular dynamics simulations of the coke formation progress on the nickel-based anode of solid oxide fuel cells . | INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER , 2018 , 91 , 40-47 .
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Investigation of carbon formation on Ni/YSZ anode of solid oxide fuel cell from CO disproportionation reaction EI SCIE Scopus
期刊论文 | 2018 , 91 , 23-29 | INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER
WoS CC Cited Count: 1 SCOPUS Cited Count: 1
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Abstract :

A challenge in the operation of solid oxide fuel cells (SOFCs) with hydrocarbon fuels is carbon deposition on the nickel/yttria-stabilized zirconia (Ni/YSZ) anode. This paper investigated the carbon formation on Ni/YSZ anode of solid oxide fuel cell (SOFC) due to CO disproportionation reaction. The steady-state rates of carbon formation under different CO/CO2 gas compositions were measured at temperature range from 600 degrees C to 800 degrees C. Experimental results showed that the steady-state rate of carbon formation caused by CO disproportionation reaction cannot solely be expressed with temperature or CO/CO2 gas ratios. A kinetic model divides the CO disproportionation reaction into several stepwise reactions, among which one of the stepwise reactions, namely, the C-O bond cleavage reaction, is considered as the rate-limiting step of the overall reaction. This kinetic model fits very well with the experimental results. Based on the kinetic model and experimental data, a steady-state rate equation of carbon formation in the process of CO disproportionation reaction was derived at the temperature from 600 degrees C to 800 degrees C on Ni/YSZ anode of SOFCs.

Keyword :

Carbon formation Steady-state rate CO disproportionation Solid oxide fuel cell

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GB/T 7714 Hua, Dong , Li, Guojun , Lu, Haibin et al. Investigation of carbon formation on Ni/YSZ anode of solid oxide fuel cell from CO disproportionation reaction [J]. | INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER , 2018 , 91 : 23-29 .
MLA Hua, Dong et al. "Investigation of carbon formation on Ni/YSZ anode of solid oxide fuel cell from CO disproportionation reaction" . | INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER 91 (2018) : 23-29 .
APA Hua, Dong , Li, Guojun , Lu, Haibin , Zhang, Xiongwen , Fan, Pengfei . Investigation of carbon formation on Ni/YSZ anode of solid oxide fuel cell from CO disproportionation reaction . | INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER , 2018 , 91 , 23-29 .
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Effects of Temperature Differences Among Cells on the Discharging Characteristics of Lithium-Ion Battery Packs with Series/Parallel Configurations during Constant Power Discharge EI SCIE Scopus
期刊论文 | 2018 , 6 (6) , 1067-1079 | ENERGY TECHNOLOGY
WoS CC Cited Count: 5 SCOPUS Cited Count: 4
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Abstract :

This work aims to make a comparative analysis of the unbalanced discharging phenomenon for battery packs with series/parallel configurations due to the temperature differences among the cells. A theoretically-based model is developed for the battery pack and constant power discharging processes are simulated by the model. At a constant temperature difference, lowering the operating temperature increases the divergence among the cell terminal voltages for the series pack and the cell discharging currents for the parallel pack. Increasing the temperature differences decreases the dischargeable energy of the series battery pack, whereas it has little effect on that of the parallel configuration. Given the same temperature difference, the cell energy differences within the parallel battery pack are 5-10 times higher than those within the series configuration, which shows that the temperature can be maintained much more uniformly for a parallel battery pack than for series configuration.

Keyword :

thermal management energy storage battery pack electric vehicles lithium-ion batteries

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GB/T 7714 Yang, Naixing , Zhang, Xiongwen , Li, Guojun et al. Effects of Temperature Differences Among Cells on the Discharging Characteristics of Lithium-Ion Battery Packs with Series/Parallel Configurations during Constant Power Discharge [J]. | ENERGY TECHNOLOGY , 2018 , 6 (6) : 1067-1079 .
MLA Yang, Naixing et al. "Effects of Temperature Differences Among Cells on the Discharging Characteristics of Lithium-Ion Battery Packs with Series/Parallel Configurations during Constant Power Discharge" . | ENERGY TECHNOLOGY 6 . 6 (2018) : 1067-1079 .
APA Yang, Naixing , Zhang, Xiongwen , Li, Guojun , Cai, Anjiang , Xu, Yunhua . Effects of Temperature Differences Among Cells on the Discharging Characteristics of Lithium-Ion Battery Packs with Series/Parallel Configurations during Constant Power Discharge . | ENERGY TECHNOLOGY , 2018 , 6 (6) , 1067-1079 .
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Comparative performance investigation of different gas flow configurations for a planar solid oxide electrolyzer cell EI SCIE Scopus
期刊论文 | 2017 , 42 (16) , 10785-10801 | INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | IF: 4.229
WoS CC Cited Count: 6 SCOPUS Cited Count: 9
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Abstract :

The performances of the solid oxide electrolyzer cells (SOECs) are closely tied to the designs of gas flow configurations. This paper performed a numerical comparative investigation on a planar SOEC with the co-flow, counter-flow, and cross-flow configurations. The experimental measurements for I-V curve were conducted and compared to the simulations for model validation. Based on the 3-dimensional numerical simulations, the distribution characteristics of the species mass fractions, temperature, current density, Nernst potential, and activation polarizations for variant gas flow configurations were analyzed and compared in detail. The intrinsic relationships and mutual effects between these parameters were examined. The simulation results show that the operating temperature gradient of the counter-flow configuration is smaller than that of co-flow and cross-flow, which is favorable for the durability of the cells. The distributions of the current density and activation polarizations in the case of cross-flow configuration appear in checkerboard characteristic. Compared to the co-flow and counter-flow, the cross-flow configuration obtains the best performance under the same boundary conditions as it produces the most hydrogen under the same boundary conditions. (C) 2017 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.

Keyword :

Gas flow configuration Solid oxide electrolyzer cell Numerical simulation Performance investigation

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GB/T 7714 Xu, Zonglei , Zhang, Xiongwen , Li, Guojun et al. Comparative performance investigation of different gas flow configurations for a planar solid oxide electrolyzer cell [J]. | INTERNATIONAL JOURNAL OF HYDROGEN ENERGY , 2017 , 42 (16) : 10785-10801 .
MLA Xu, Zonglei et al. "Comparative performance investigation of different gas flow configurations for a planar solid oxide electrolyzer cell" . | INTERNATIONAL JOURNAL OF HYDROGEN ENERGY 42 . 16 (2017) : 10785-10801 .
APA Xu, Zonglei , Zhang, Xiongwen , Li, Guojun , Xiao, Guoping , Wang, Jian-Qiang . Comparative performance investigation of different gas flow configurations for a planar solid oxide electrolyzer cell . | INTERNATIONAL JOURNAL OF HYDROGEN ENERGY , 2017 , 42 (16) , 10785-10801 .
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