The Experts below are selected from a list of 12153 Experts worldwide ranked by ideXlab platform
Jinhui Pang - One of the best experts on this subject based on the ideXlab platform.
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poly arylene ether ketone with tetra quaternary ammonium carbazole derivative pendant for Anion Exchange Membrane
Polymer, 2020Co-Authors: Kaiqi Wang, Di Liu, Liming Lin, Jinhui PangAbstract:Abstract As a key component of fuel cell, the Anion Exchange Membrane (AEM) must present high durability, which includes dimensional stability，thermal stability，and alkali resistance. In order to obtain AEM with high performance, besides stable structure, the polymer should have high molecular weight and advantaged functional group position. In this work, a novel high molecular weight polymer precursor, poly(arylene ether ketone) (PAEK) with iodobenzene pendent was designed and prepared. And then, the function tetra-quaternary ammonium carbazole was introduced onto polymer backbone by Ullmann grafting reaction and quaterisation. The obtained Membranes exhibited good dimensional stability, appropriate thermal stability and high ion conductivity. In addition, the Membranes exhibited good alkaline resistance, as it still kept 90% of the conductivity after immersion in 4M NaOH solution for a week. Over all, the Membranes in this work are promising for Anion Exchange Membrane fuel cell.
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poly arylene ether ketone with tetra quaternary ammonium carbazole derivative pendant for Anion Exchange Membrane
Polymer, 2020Co-Authors: Xuefeng Li, Kaiqi Wang, Jinhui PangAbstract:Abstract As a key component of fuel cell, the Anion Exchange Membrane (AEM) must present high durability, which includes dimensional stability，thermal stability，and alkali resistance. In order to obtain AEM with high performance, besides stable structure, the polymer should have high molecular weight and advantaged functional group position. In this work, a novel high molecular polymer precursor, poly(arylene ether ketone) (PAEK) with iodobenzene pendent was designed and prepared. And then, the function tetra-quaternary ammonium carbazole was introduced onto polymer backbone by Ullmann grafting reaction and quaterisation . The obtained Membranes exhibited good dimensional stability, appropriate thermal stability, and high ion conductivity. In addition, the Membranes exhibited good alkaline resistance, as it still kept 90% of the conductivity after immersion in 4M NaOH solution for a week. Over all, the Membrane in this work is promising for Anion Exchange Membrane fuel cell.
Kaiqi Wang - One of the best experts on this subject based on the ideXlab platform.
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poly arylene ether ketone with tetra quaternary ammonium carbazole derivative pendant for Anion Exchange Membrane
Polymer, 2020Co-Authors: Kaiqi Wang, Di Liu, Liming Lin, Jinhui PangAbstract:Abstract As a key component of fuel cell, the Anion Exchange Membrane (AEM) must present high durability, which includes dimensional stability，thermal stability，and alkali resistance. In order to obtain AEM with high performance, besides stable structure, the polymer should have high molecular weight and advantaged functional group position. In this work, a novel high molecular weight polymer precursor, poly(arylene ether ketone) (PAEK) with iodobenzene pendent was designed and prepared. And then, the function tetra-quaternary ammonium carbazole was introduced onto polymer backbone by Ullmann grafting reaction and quaterisation. The obtained Membranes exhibited good dimensional stability, appropriate thermal stability and high ion conductivity. In addition, the Membranes exhibited good alkaline resistance, as it still kept 90% of the conductivity after immersion in 4M NaOH solution for a week. Over all, the Membranes in this work are promising for Anion Exchange Membrane fuel cell.
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poly arylene ether ketone with tetra quaternary ammonium carbazole derivative pendant for Anion Exchange Membrane
Polymer, 2020Co-Authors: Xuefeng Li, Kaiqi Wang, Jinhui PangAbstract:Abstract As a key component of fuel cell, the Anion Exchange Membrane (AEM) must present high durability, which includes dimensional stability，thermal stability，and alkali resistance. In order to obtain AEM with high performance, besides stable structure, the polymer should have high molecular weight and advantaged functional group position. In this work, a novel high molecular polymer precursor, poly(arylene ether ketone) (PAEK) with iodobenzene pendent was designed and prepared. And then, the function tetra-quaternary ammonium carbazole was introduced onto polymer backbone by Ullmann grafting reaction and quaterisation . The obtained Membranes exhibited good dimensional stability, appropriate thermal stability, and high ion conductivity. In addition, the Membranes exhibited good alkaline resistance, as it still kept 90% of the conductivity after immersion in 4M NaOH solution for a week. Over all, the Membrane in this work is promising for Anion Exchange Membrane fuel cell.
Nobuhiro Kuriyama - One of the best experts on this subject based on the ideXlab platform.
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A high performance Anion Exchange Membrane-type ammonia borane fuel cell
Journal of Power Sources, 2008Co-Authors: Xin-bo Zhang, Kazuaki Yasuda, Jun-min Yan, Song Han, Hiroshi Shioyama, Nobuhiro Kuriyama, Qiang XuAbstract:The electrochemical behavior of the novel fuel cell directly using aqueous ammonia borane (NH3BH3 )a s the fuel has been systematically investigated. The cell consists of an oxygen cathode and an ammonia borane solution fed anode, where the catalyst layers are made of Vulcan XC-72 with 46.6 wt.% Pt. An Anion Exchange Membrane is employed as the electrolyte. It is found that the concentrations of NH3BH3 solution and temperatures significantly affect the open circuit potentials of the anode as well as the cell performance. Although the cell voltages decrease with the increase of current densities, the cell is capable of discharging at a current density of 185 mA cm −2 with the cell potential larger than 0.6 V. The obtained high energy densities indicate that the direct ammonia borane fuel cell holds potential applications for portable devices. © 2008 Elsevier B.V. All rights reserved.
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A high performance Anion Exchange Membrane-type ammonia borane fuel cell
Journal of Power Sources, 2008Co-Authors: Xin-bo Zhang, Kazuaki Yasuda, Jun-min Yan, Song Han, Hiroshi Shioyama, Nobuhiro KuriyamaAbstract:The electrochemical behavior of the novel fuel cell directly using aqueous ammonia borane (NH3BH3 )a s the fuel has been systematically investigated. The cell consists of an oxygen cathode and an ammonia borane solution fed anode, where the catalyst layers are made of Vulcan XC-72 with 46.6 wt.% Pt. An Anion Exchange Membrane is employed as the electrolyte. It is found that the concentrations of NH3BH3 solution and temperatures significantly affect the open circuit potentials of the anode as well as the cell performance. Although the cell voltages decrease with the increase of current densities, the cell is capable of discharging at a current density of 185 mA cm −2 with the cell potential larger than 0.6 V. The obtained high energy densities indicate that the direct ammonia borane fuel cell holds potential applications for portable devices. © 2008 Elsevier B.V. All rights reserved.
Zhengjin Yang - One of the best experts on this subject based on the ideXlab platform.
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Stability challenge in Anion Exchange Membrane for fuel cells
Current opinion in chemical engineering, 2016Co-Authors: Zhengjin Yang, Jin Ran, Bin Wu, Liang Wu, Tongwen XuAbstract:Polymeric Membrane based fuel cells are becoming increasingly important in light of their high efficiency. However, the wide application of proton Exchange Membrane fuel cell (PEMFC) was hindered by its high cost and total dependency on Pt catalysts. The steep rising of Anion Exchange Membrane fuel cells (AEMFCs) could be more beneficial as they have got the potentiality to settle this obstacle in a more cost effective way. Anion conducting material (especially polymeric Membranes and hybrid Membranes), known as an important and vital component face limitation in practical application due to its low stability under strong basic conditions. Herein, we presented the recent research findings on Anion Exchange Membrane (AEM) stability issues and the practice in constructing alkaline stable AEMs. The stability issue in Anion conductive metal organic frameworks (MOFs) was also covered.
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Stability challenge in Anion Exchange Membrane for fuel cells
Current opinion in chemical engineering, 2016Co-Authors: Zhengjin Yang, Jin Ran, Bin Wu, Liang Wu, Tongwen XuAbstract:Polymeric Membrane based fuel cells are becoming increasingly important in light of their high efficiency. However, the wide application of proton Exchange Membrane fuel cell (PEMFC) was hindered by its high cost and total dependency on Pt catalysts. The steep rising of Anion Exchange Membrane fuel cells (AEMFCs) could be more beneficial as they have got the potentiality to settle this obstacle in a more cost effective way. Anion conducting material (especially polymeric Membranes and hybrid Membranes), known as an important and vital component face limitation in practical application due to its low stability under strong basic conditions. Herein, we presented the recent research findings on Anion Exchange Membrane (AEM) stability issues and the practice in constructing alkaline stable AEMs. The stability issue in Anion conductive metal organic frameworks (MOFs) was also covered.
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Wittig reaction constructed an alkaline stable Anion Exchange Membrane
Journal of Membrane Science, 2016Co-Authors: Jianqiu Hou, Xinyu Wang, Yazhi Liu, Zhengjin YangAbstract:Abstract Pendant type Anion Exchange Membranes are currently believed to the state of the art Membrane due to enhanced stability. Yet, challenge lies in the limited strategy to construct such structure. Herein, pendant type Anion Exchange Membranes with flexible quaternary ammonium groups attached to poly(2,6-dimethyl-1,4-phenylene oxide) (PPO) backbone via length-tunable spacers were successfully prepared by mild and one-pot Wittig reaction. The as-prepared Membranes show restricted water swelling, high hydroxide conductivity and low methanol permeability at low ion Exchange capacity due to spacer induced microphase separation. Among them, QPPO-SC6 exhibits highest hydroxide conductivity (from 37.6 mS/cm at 20 °C to 99.5 mS/cm at 80 °C) and good chemical stability in alkaline environment at 80 °C. The mechanical and thermal properties of these Membranes were also investigated. Results prove that our strategy in preparing Anion Exchange Membranes with flexible spacers has great application potential in Anion Exchange Membrane fuel cells.
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Highly Water Resistant Anion Exchange Membrane for Fuel Cells.
Macromolecular rapid communications, 2015Co-Authors: Zhengjin Yang, Jianqiu Hou, Xinyu WangAbstract:For Anion Exchange Membranes (AEMs), achieving efficient hydroxide conductivity without excessive hydrophilicity presents a challenge. Hence, new strategies for constructing mechanically strengthened and hydroxide conductive (especially at controlled humidity) Membranes are critical for developing better AEMs. Macromolecular modification involving ylide chemistry (Wittig reaction) for the fabrication of novel AEMs with an interpenetrating polymer network structure is reported. The macromolecular modification is cost effective, facile, and based on a one-pot synthesis. AEM water uptake is reduced to 3.6 wt% and a high hydroxide conductivity (69.7 mS cm(-1) , 90 °C) is achieved simultaneously. More importantly, the Membrane exhibits similar tensile strength (>35 MPa) and comparable flexibility in both dry and wet states. These AEMs could find further applications within Anion Exchange Membrane fuel cells with low humidity or photoelectric assemblies.
Xin-bo Zhang - One of the best experts on this subject based on the ideXlab platform.
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A high performance Anion Exchange Membrane-type ammonia borane fuel cell
Journal of Power Sources, 2008Co-Authors: Xin-bo Zhang, Kazuaki Yasuda, Jun-min Yan, Song Han, Hiroshi Shioyama, Nobuhiro Kuriyama, Qiang XuAbstract:The electrochemical behavior of the novel fuel cell directly using aqueous ammonia borane (NH3BH3 )a s the fuel has been systematically investigated. The cell consists of an oxygen cathode and an ammonia borane solution fed anode, where the catalyst layers are made of Vulcan XC-72 with 46.6 wt.% Pt. An Anion Exchange Membrane is employed as the electrolyte. It is found that the concentrations of NH3BH3 solution and temperatures significantly affect the open circuit potentials of the anode as well as the cell performance. Although the cell voltages decrease with the increase of current densities, the cell is capable of discharging at a current density of 185 mA cm −2 with the cell potential larger than 0.6 V. The obtained high energy densities indicate that the direct ammonia borane fuel cell holds potential applications for portable devices. © 2008 Elsevier B.V. All rights reserved.
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A high performance Anion Exchange Membrane-type ammonia borane fuel cell
Journal of Power Sources, 2008Co-Authors: Xin-bo Zhang, Kazuaki Yasuda, Jun-min Yan, Song Han, Hiroshi Shioyama, Nobuhiro KuriyamaAbstract:The electrochemical behavior of the novel fuel cell directly using aqueous ammonia borane (NH3BH3 )a s the fuel has been systematically investigated. The cell consists of an oxygen cathode and an ammonia borane solution fed anode, where the catalyst layers are made of Vulcan XC-72 with 46.6 wt.% Pt. An Anion Exchange Membrane is employed as the electrolyte. It is found that the concentrations of NH3BH3 solution and temperatures significantly affect the open circuit potentials of the anode as well as the cell performance. Although the cell voltages decrease with the increase of current densities, the cell is capable of discharging at a current density of 185 mA cm −2 with the cell potential larger than 0.6 V. The obtained high energy densities indicate that the direct ammonia borane fuel cell holds potential applications for portable devices. © 2008 Elsevier B.V. All rights reserved.