The Experts below are selected from a list of 204 Experts worldwide ranked by ideXlab platform
Khalil Amine - One of the best experts on this subject based on the ideXlab platform.
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from Sodium oxygen to Sodium air battery enabled by Sodium Peroxide dihydrate
Nano Letters, 2020Co-Authors: Rongyue Wang, Dongzhou Zhang, Yifei Yuan, Khalil Amine, Tao Zhang, Reza ShahbazianyassarAbstract:Metal-air batteries have attracted extensive research interests due to their high theoretical energy density. However, most of the previous studies were limited by applying pure oxygen in the cathode, sacrificing the gravimetric and volumetric energy density. Here, we develop a real Sodium-"air" battery, in which the rechargeability of the battery relies on the reversible reaction of the formation of Sodium Peroxide dihydrate (Na2O2·2H2O). After an oxygen evolution reaction catalyst is applied, the charge overpotential is largely reduced to achieve a high energy efficiency. The Sodium-air batteries deliver high areal capacity of 4.2 mAh·cm-2 and have a decent cycle life of 100 cycles. The oxygen crossover effect is largely suppressed by replacing the oxygen with air, whereas the dense solid electrolyte interphase formed on the Sodium anode further prolongs the cycle life.
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From Sodium–Oxygen to Sodium–Air Battery: Enabled by Sodium Peroxide Dihydrate
Nano letters, 2020Co-Authors: Rongyue Wang, Dongzhou Zhang, Yifei Yuan, Tao Zhang, Reza Shahbazian-yassar, Khalil AmineAbstract:Metal-air batteries have attracted extensive research interests due to their high theoretical energy density. However, most of the previous studies were limited by applying pure oxygen in the cathode, sacrificing the gravimetric and volumetric energy density. Here, we develop a real Sodium-"air" battery, in which the rechargeability of the battery relies on the reversible reaction of the formation of Sodium Peroxide dihydrate (Na2O2·2H2O). After an oxygen evolution reaction catalyst is applied, the charge overpotential is largely reduced to achieve a high energy efficiency. The Sodium-air batteries deliver high areal capacity of 4.2 mAh·cm-2 and have a decent cycle life of 100 cycles. The oxygen crossover effect is largely suppressed by replacing the oxygen with air, whereas the dense solid electrolyte interphase formed on the Sodium anode further prolongs the cycle life.
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High-capacity Sodium Peroxide Based Na-O2 Batteries with Low Charge Overpotential via a Nanostructured Catalytic Cathode
ACS Energy Letters, 2018Co-Authors: Dongzhou Zhang, Yu Lei, Yifei Yuan, Khalil AmineAbstract:The suPeroxide based Na–O2 battery has circumvented the issue of large charge overpotential in Li–O2 batteries; however, the one-electron process leads to limited capacity. Herein, a Sodium Peroxide based low-overpotential (∼0.5 V) Na–O2 battery with a capacity as high as 7.5 mAh/cm2 is developed with Pd nanoparticles as catalysts on the cathode.
Jürgen Janek - One of the best experts on this subject based on the ideXlab platform.
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how to control the discharge product in Sodium oxygen batteries proposing new pathways for Sodium Peroxide formation
Energy technology, 2017Co-Authors: Daniel Schröder, Conrad L. Bender, Ricardo Pinedo, Waldemar Bartuli, Matthias Schwab, željko Tomovic, Jürgen JanekAbstract:It is an unsolved problem how to steer between Sodium suPeroxide and Sodium Peroxide as discharge products in Sodium–oxygen batteries. Sodium Peroxide yields a higher theoretical energy density; thus, it is preferred in view of maximized energy density. Three novel approaches to form Sodium Peroxide are presented: First, cells loaded with Sodium suPeroxide are further discharged in argon, with the aim of reducing Sodium suPeroxide to Peroxide. Second, carbon nanotube electrodes preloaded with Sodium Peroxide are utilized. Third, Sodium Peroxide is dissolved in the electrolyte to enhance precipitation of solid Sodium Peroxide. Interestingly, all approaches yield Sodium suPeroxide as a discharge product. Thus, it might not be possible to have high energy density Sodium–oxygen batteries with Sodium Peroxide as the discharge product. However, potential pathways for Peroxide formation during discharge have been excluded to help to find the true factors that govern the competition between suPeroxide and Peroxide formation.
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How to Control the Discharge Product in Sodium–Oxygen Batteries: Proposing New Pathways for Sodium Peroxide Formation
Energy Technology, 2017Co-Authors: Daniel Schröder, Conrad L. Bender, Ricardo Pinedo, Waldemar Bartuli, Matthias Schwab, Željko Tomović, Jürgen JanekAbstract:It is an unsolved problem how to steer between Sodium suPeroxide and Sodium Peroxide as discharge products in Sodium–oxygen batteries. Sodium Peroxide yields a higher theoretical energy density; thus, it is preferred in view of maximized energy density. Three novel approaches to form Sodium Peroxide are presented: First, cells loaded with Sodium suPeroxide are further discharged in argon, with the aim of reducing Sodium suPeroxide to Peroxide. Second, carbon nanotube electrodes preloaded with Sodium Peroxide are utilized. Third, Sodium Peroxide is dissolved in the electrolyte to enhance precipitation of solid Sodium Peroxide. Interestingly, all approaches yield Sodium suPeroxide as a discharge product. Thus, it might not be possible to have high energy density Sodium–oxygen batteries with Sodium Peroxide as the discharge product. However, potential pathways for Peroxide formation during discharge have been excluded to help to find the true factors that govern the competition between suPeroxide and Peroxide formation.
Elisabeth Kahr - One of the best experts on this subject based on the ideXlab platform.
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determination of rare earth elements y th zr hf nb and ta in geological reference materials g 2 g 3 sco 1 and wgb 1 by Sodium Peroxide sintering and inductively coupled plasma mass spectrometry
Geostandards and Geoanalytical Research, 2002Co-Authors: Thomas Meisel, Nina Schöner, Vaida Paliulionyte, Elisabeth KahrAbstract:Data are reported for rare earth elements (REE), Y, Th, Zr, Hf, Nb and Ta in four geological reference materials using Sodium Peroxide (Na2O2) sintering and inductively coupled plasma-mass spectrometry. The described procedure was used by students during their thesis work. A compilation of their reference material data acquired over one year of laboratory work demonstrates the ease and reliability of the method and the high reproducibility of the analytical results. Relative standard deviations of up to thirty six measurements of one reference material were lower than 5% for Y and the REE. Reproduciblities of Zr, Hf, Nb, Ta and Th were higher at between 5% and 10%, and can be attributed to the inhomogeneous distribution of zircon and other trace mineral phases and uncorrected drift effects. The concentration data are compared to reference and literature values and demonstrate that the procedure is also accurate. New data on G-3 show some systematic deviations from G-2, which are statistically significant. Des donnees de concentrations de Terres Rares, Y, Th, Zr, Hf, Nb et Ta dans quatre materiaux geologiques de reference apres agglomeration avec Na2O2 ont ete analyses par ICP-MS. La procedure decrite a ete utilisee par des etudiants durant leur these. Une compilation de leurs donnees acquises pendant plus d' un an de travail de laboratoire sur les materiaux de reference, a montre la facilitye et la fiabilite de la methode et la grande reproductibilite des resultats analytiques. Les deviations standards relatives sur 36 mesures d' un meme materiau de reference etaient inferieures a 5% pour Y et les Terres Rares. Les reproductibilites du Zr, Hf, Nb, Ta, et Th etaient entre 5 et 10 % et peuvent etre attribuees a la distribution inhomogene du zircon et des autres phases minerales accessoires et a des effets de derive mal corriges. Les donnees de concentration sont comparees aux valeurs de la litterature et aux valeurs de reference et demontrent que la procedure est aussi juste. De nouvelles donnees sur G-3 montrent quelques deviations systematiques par rapport a G-2, qui sont statistiquement significatives.
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Determination of Rare Earth Elements, Y, Th, Zr, Hf, Nb and Ta in Geological Reference Materials G‐2, G‐3, SCo‐1 and WGB‐1 by Sodium Peroxide Sintering and Inductively Coupled Plasma‐Mass Spectrometry
Geostandards and Geoanalytical Research, 2002Co-Authors: Thomas Meisel, Nina Schöner, Vaida Paliulionyte, Elisabeth KahrAbstract:Data are reported for rare earth elements (REE), Y, Th, Zr, Hf, Nb and Ta in four geological reference materials using Sodium Peroxide (Na2O2) sintering and inductively coupled plasma-mass spectrometry. The described procedure was used by students during their thesis work. A compilation of their reference material data acquired over one year of laboratory work demonstrates the ease and reliability of the method and the high reproducibility of the analytical results. Relative standard deviations of up to thirty six measurements of one reference material were lower than 5% for Y and the REE. Reproduciblities of Zr, Hf, Nb, Ta and Th were higher at between 5% and 10%, and can be attributed to the inhomogeneous distribution of zircon and other trace mineral phases and uncorrected drift effects. The concentration data are compared to reference and literature values and demonstrate that the procedure is also accurate. New data on G-3 show some systematic deviations from G-2, which are statistically significant. Des donnees de concentrations de Terres Rares, Y, Th, Zr, Hf, Nb et Ta dans quatre materiaux geologiques de reference apres agglomeration avec Na2O2 ont ete analyses par ICP-MS. La procedure decrite a ete utilisee par des etudiants durant leur these. Une compilation de leurs donnees acquises pendant plus d' un an de travail de laboratoire sur les materiaux de reference, a montre la facilitye et la fiabilite de la methode et la grande reproductibilite des resultats analytiques. Les deviations standards relatives sur 36 mesures d' un meme materiau de reference etaient inferieures a 5% pour Y et les Terres Rares. Les reproductibilites du Zr, Hf, Nb, Ta, et Th etaient entre 5 et 10 % et peuvent etre attribuees a la distribution inhomogene du zircon et des autres phases minerales accessoires et a des effets de derive mal corriges. Les donnees de concentration sont comparees aux valeurs de la litterature et aux valeurs de reference et demontrent que la procedure est aussi juste. De nouvelles donnees sur G-3 montrent quelques deviations systematiques par rapport a G-2, qui sont statistiquement significatives.
Yifei Yuan - One of the best experts on this subject based on the ideXlab platform.
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from Sodium oxygen to Sodium air battery enabled by Sodium Peroxide dihydrate
Nano Letters, 2020Co-Authors: Rongyue Wang, Dongzhou Zhang, Yifei Yuan, Khalil Amine, Tao Zhang, Reza ShahbazianyassarAbstract:Metal-air batteries have attracted extensive research interests due to their high theoretical energy density. However, most of the previous studies were limited by applying pure oxygen in the cathode, sacrificing the gravimetric and volumetric energy density. Here, we develop a real Sodium-"air" battery, in which the rechargeability of the battery relies on the reversible reaction of the formation of Sodium Peroxide dihydrate (Na2O2·2H2O). After an oxygen evolution reaction catalyst is applied, the charge overpotential is largely reduced to achieve a high energy efficiency. The Sodium-air batteries deliver high areal capacity of 4.2 mAh·cm-2 and have a decent cycle life of 100 cycles. The oxygen crossover effect is largely suppressed by replacing the oxygen with air, whereas the dense solid electrolyte interphase formed on the Sodium anode further prolongs the cycle life.
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From Sodium–Oxygen to Sodium–Air Battery: Enabled by Sodium Peroxide Dihydrate
Nano letters, 2020Co-Authors: Rongyue Wang, Dongzhou Zhang, Yifei Yuan, Tao Zhang, Reza Shahbazian-yassar, Khalil AmineAbstract:Metal-air batteries have attracted extensive research interests due to their high theoretical energy density. However, most of the previous studies were limited by applying pure oxygen in the cathode, sacrificing the gravimetric and volumetric energy density. Here, we develop a real Sodium-"air" battery, in which the rechargeability of the battery relies on the reversible reaction of the formation of Sodium Peroxide dihydrate (Na2O2·2H2O). After an oxygen evolution reaction catalyst is applied, the charge overpotential is largely reduced to achieve a high energy efficiency. The Sodium-air batteries deliver high areal capacity of 4.2 mAh·cm-2 and have a decent cycle life of 100 cycles. The oxygen crossover effect is largely suppressed by replacing the oxygen with air, whereas the dense solid electrolyte interphase formed on the Sodium anode further prolongs the cycle life.
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High-capacity Sodium Peroxide Based Na-O2 Batteries with Low Charge Overpotential via a Nanostructured Catalytic Cathode
ACS Energy Letters, 2018Co-Authors: Dongzhou Zhang, Yu Lei, Yifei Yuan, Khalil AmineAbstract:The suPeroxide based Na–O2 battery has circumvented the issue of large charge overpotential in Li–O2 batteries; however, the one-electron process leads to limited capacity. Herein, a Sodium Peroxide based low-overpotential (∼0.5 V) Na–O2 battery with a capacity as high as 7.5 mAh/cm2 is developed with Pd nanoparticles as catalysts on the cathode.
Daniel Schröder - One of the best experts on this subject based on the ideXlab platform.
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how to control the discharge product in Sodium oxygen batteries proposing new pathways for Sodium Peroxide formation
Energy technology, 2017Co-Authors: Daniel Schröder, Conrad L. Bender, Ricardo Pinedo, Waldemar Bartuli, Matthias Schwab, željko Tomovic, Jürgen JanekAbstract:It is an unsolved problem how to steer between Sodium suPeroxide and Sodium Peroxide as discharge products in Sodium–oxygen batteries. Sodium Peroxide yields a higher theoretical energy density; thus, it is preferred in view of maximized energy density. Three novel approaches to form Sodium Peroxide are presented: First, cells loaded with Sodium suPeroxide are further discharged in argon, with the aim of reducing Sodium suPeroxide to Peroxide. Second, carbon nanotube electrodes preloaded with Sodium Peroxide are utilized. Third, Sodium Peroxide is dissolved in the electrolyte to enhance precipitation of solid Sodium Peroxide. Interestingly, all approaches yield Sodium suPeroxide as a discharge product. Thus, it might not be possible to have high energy density Sodium–oxygen batteries with Sodium Peroxide as the discharge product. However, potential pathways for Peroxide formation during discharge have been excluded to help to find the true factors that govern the competition between suPeroxide and Peroxide formation.
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How to Control the Discharge Product in Sodium–Oxygen Batteries: Proposing New Pathways for Sodium Peroxide Formation
Energy Technology, 2017Co-Authors: Daniel Schröder, Conrad L. Bender, Ricardo Pinedo, Waldemar Bartuli, Matthias Schwab, Željko Tomović, Jürgen JanekAbstract:It is an unsolved problem how to steer between Sodium suPeroxide and Sodium Peroxide as discharge products in Sodium–oxygen batteries. Sodium Peroxide yields a higher theoretical energy density; thus, it is preferred in view of maximized energy density. Three novel approaches to form Sodium Peroxide are presented: First, cells loaded with Sodium suPeroxide are further discharged in argon, with the aim of reducing Sodium suPeroxide to Peroxide. Second, carbon nanotube electrodes preloaded with Sodium Peroxide are utilized. Third, Sodium Peroxide is dissolved in the electrolyte to enhance precipitation of solid Sodium Peroxide. Interestingly, all approaches yield Sodium suPeroxide as a discharge product. Thus, it might not be possible to have high energy density Sodium–oxygen batteries with Sodium Peroxide as the discharge product. However, potential pathways for Peroxide formation during discharge have been excluded to help to find the true factors that govern the competition between suPeroxide and Peroxide formation.
