The Experts below are selected from a list of 297 Experts worldwide ranked by ideXlab platform
Kei Kubota - One of the best experts on this subject based on the ideXlab platform.
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PolyanIonic Compounds for Potassium-Ion Batteries.
Chemical record (New York N.Y.), 2018Co-Authors: Tomooki Hosaka, Tomoaki Shimamura, Kei Kubota, Shinichi KomabaAbstract:Lithium-Ion batteries have the highest energy density among practical secondary batteries and are widely used for electronic devices, electric vehicles, and even statIonary energy-storage systems. Along with the expansIon of demand and applicatIons, the concern about resources of lithium and cobalt is growing. Therefore, secondary batteries composed of abundant elements are required to complement lithium-Ion batteries. In recent years, the development of Potassium-Ion batteries has attracted much attentIon, especially for large-scale energy storage. In order to realize Potassium-Ion batteries, various compounds are proposed and investigated as positive electrode materials, including layered transitIon-metal oxides, Prussian blue analogues, and polyanIonic compounds. This article offers a review of polyanIonic compounds which are typically composed of abundant elements and expected high operating potential. Furthermore, we deliver our new results to partially compensate for lack of studies and provide a future perspective.
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Highly concentrated electrolyte solutIons for 4 V class Potassium-Ion batteries
Chemical Communications, 2018Co-Authors: Tomooki Hosaka, Kei Kubota, Haruka Kojima, Shinichi KomabaAbstract:Stable cycling of a 4 V-class Potassium-Ion battery is demonstrated with a highly concentrated Potassium bis(fluorosulfonyl)amide 1,2-dimethoxyethane solutIon as an electrolyte. Not only graphite and K2Mn[Fe(CN)6] half cells but also graphite//K2Mn[Fe(CN)6] full cells filled with the electrolyte exhibit higher coulombic efficiency and better cyclability than those of KPF6/carbonate ester solutIons.
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Potassium intercalatIon into graphite to realize high voltage high power Potassium Ion batteries and Potassium Ion capacitors
Electrochemistry Communications, 2015Co-Authors: Kei Kubota, Shinichi Komaba, Tatsuya Hasegawa, Mouad DahbiAbstract:Abstract Highly reversible Potassium intercalatIon into graphite in carbonate ester solutIon at room temperature is achieved by electrochemical reductIon at the potential approaching to K + /K standard potential which is lower than that of Li + /Li. The intercalatIon results in formatIon of stage-1 KC 8 compound with delivering 244 mAh g − 1 of reversible capacity. The initial irreversible capacity is suppressed by polycarboxylate binder compared to poly(vinyledene fluoride) binder. The lower potential, good cyclability, and excellent rate capability are first demonstrated for energy storage applicatIons. Because of the lowest potential and weakest solvatIon among Li + , Na + , K + , Mg 2 + , and Ca 2 + Ion carriers, Potassium shuttlecock mechanism between two insertIon materials as “Potassium-Ion battery” is advantageous for higher-voltage/-power rechargeable batteries. The excellent rate performance is beneficial for the applicatIon to hybrid-type capacitor, “Potassium-Ion capacitor,” as an alternative to lithium-Ion capacitors.
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Potassium intercalatIon into graphite to realize high-voltage/high-power Potassium-Ion batteries and Potassium-Ion capacitors
Electrochemistry Communications, 2015Co-Authors: Shinichi Komaba, Tatsuya Hasegawa, Mouad Dahbi, Kei KubotaAbstract:Abstract Highly reversible Potassium intercalatIon into graphite in carbonate ester solutIon at room temperature is achieved by electrochemical reductIon at the potential approaching to K + /K standard potential which is lower than that of Li + /Li. The intercalatIon results in formatIon of stage-1 KC 8 compound with delivering 244 mAh g − 1 of reversible capacity. The initial irreversible capacity is suppressed by polycarboxylate binder compared to poly(vinyledene fluoride) binder. The lower potential, good cyclability, and excellent rate capability are first demonstrated for energy storage applicatIons. Because of the lowest potential and weakest solvatIon among Li + , Na + , K + , Mg 2 + , and Ca 2 + Ion carriers, Potassium shuttlecock mechanism between two insertIon materials as “Potassium-Ion battery” is advantageous for higher-voltage/-power rechargeable batteries. The excellent rate performance is beneficial for the applicatIon to hybrid-type capacitor, “Potassium-Ion capacitor,” as an alternative to lithium-Ion capacitors.
Shinichi Komaba - One of the best experts on this subject based on the ideXlab platform.
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PolyanIonic Compounds for Potassium-Ion Batteries.
Chemical record (New York N.Y.), 2018Co-Authors: Tomooki Hosaka, Tomoaki Shimamura, Kei Kubota, Shinichi KomabaAbstract:Lithium-Ion batteries have the highest energy density among practical secondary batteries and are widely used for electronic devices, electric vehicles, and even statIonary energy-storage systems. Along with the expansIon of demand and applicatIons, the concern about resources of lithium and cobalt is growing. Therefore, secondary batteries composed of abundant elements are required to complement lithium-Ion batteries. In recent years, the development of Potassium-Ion batteries has attracted much attentIon, especially for large-scale energy storage. In order to realize Potassium-Ion batteries, various compounds are proposed and investigated as positive electrode materials, including layered transitIon-metal oxides, Prussian blue analogues, and polyanIonic compounds. This article offers a review of polyanIonic compounds which are typically composed of abundant elements and expected high operating potential. Furthermore, we deliver our new results to partially compensate for lack of studies and provide a future perspective.
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Highly concentrated electrolyte solutIons for 4 V class Potassium-Ion batteries
Chemical Communications, 2018Co-Authors: Tomooki Hosaka, Kei Kubota, Haruka Kojima, Shinichi KomabaAbstract:Stable cycling of a 4 V-class Potassium-Ion battery is demonstrated with a highly concentrated Potassium bis(fluorosulfonyl)amide 1,2-dimethoxyethane solutIon as an electrolyte. Not only graphite and K2Mn[Fe(CN)6] half cells but also graphite//K2Mn[Fe(CN)6] full cells filled with the electrolyte exhibit higher coulombic efficiency and better cyclability than those of KPF6/carbonate ester solutIons.
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Potassium intercalatIon into graphite to realize high voltage high power Potassium Ion batteries and Potassium Ion capacitors
Electrochemistry Communications, 2015Co-Authors: Kei Kubota, Shinichi Komaba, Tatsuya Hasegawa, Mouad DahbiAbstract:Abstract Highly reversible Potassium intercalatIon into graphite in carbonate ester solutIon at room temperature is achieved by electrochemical reductIon at the potential approaching to K + /K standard potential which is lower than that of Li + /Li. The intercalatIon results in formatIon of stage-1 KC 8 compound with delivering 244 mAh g − 1 of reversible capacity. The initial irreversible capacity is suppressed by polycarboxylate binder compared to poly(vinyledene fluoride) binder. The lower potential, good cyclability, and excellent rate capability are first demonstrated for energy storage applicatIons. Because of the lowest potential and weakest solvatIon among Li + , Na + , K + , Mg 2 + , and Ca 2 + Ion carriers, Potassium shuttlecock mechanism between two insertIon materials as “Potassium-Ion battery” is advantageous for higher-voltage/-power rechargeable batteries. The excellent rate performance is beneficial for the applicatIon to hybrid-type capacitor, “Potassium-Ion capacitor,” as an alternative to lithium-Ion capacitors.
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Potassium intercalatIon into graphite to realize high-voltage/high-power Potassium-Ion batteries and Potassium-Ion capacitors
Electrochemistry Communications, 2015Co-Authors: Shinichi Komaba, Tatsuya Hasegawa, Mouad Dahbi, Kei KubotaAbstract:Abstract Highly reversible Potassium intercalatIon into graphite in carbonate ester solutIon at room temperature is achieved by electrochemical reductIon at the potential approaching to K + /K standard potential which is lower than that of Li + /Li. The intercalatIon results in formatIon of stage-1 KC 8 compound with delivering 244 mAh g − 1 of reversible capacity. The initial irreversible capacity is suppressed by polycarboxylate binder compared to poly(vinyledene fluoride) binder. The lower potential, good cyclability, and excellent rate capability are first demonstrated for energy storage applicatIons. Because of the lowest potential and weakest solvatIon among Li + , Na + , K + , Mg 2 + , and Ca 2 + Ion carriers, Potassium shuttlecock mechanism between two insertIon materials as “Potassium-Ion battery” is advantageous for higher-voltage/-power rechargeable batteries. The excellent rate performance is beneficial for the applicatIon to hybrid-type capacitor, “Potassium-Ion capacitor,” as an alternative to lithium-Ion capacitors.
Mouad Dahbi - One of the best experts on this subject based on the ideXlab platform.
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Potassium intercalatIon into graphite to realize high voltage high power Potassium Ion batteries and Potassium Ion capacitors
Electrochemistry Communications, 2015Co-Authors: Kei Kubota, Shinichi Komaba, Tatsuya Hasegawa, Mouad DahbiAbstract:Abstract Highly reversible Potassium intercalatIon into graphite in carbonate ester solutIon at room temperature is achieved by electrochemical reductIon at the potential approaching to K + /K standard potential which is lower than that of Li + /Li. The intercalatIon results in formatIon of stage-1 KC 8 compound with delivering 244 mAh g − 1 of reversible capacity. The initial irreversible capacity is suppressed by polycarboxylate binder compared to poly(vinyledene fluoride) binder. The lower potential, good cyclability, and excellent rate capability are first demonstrated for energy storage applicatIons. Because of the lowest potential and weakest solvatIon among Li + , Na + , K + , Mg 2 + , and Ca 2 + Ion carriers, Potassium shuttlecock mechanism between two insertIon materials as “Potassium-Ion battery” is advantageous for higher-voltage/-power rechargeable batteries. The excellent rate performance is beneficial for the applicatIon to hybrid-type capacitor, “Potassium-Ion capacitor,” as an alternative to lithium-Ion capacitors.
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Potassium intercalatIon into graphite to realize high-voltage/high-power Potassium-Ion batteries and Potassium-Ion capacitors
Electrochemistry Communications, 2015Co-Authors: Shinichi Komaba, Tatsuya Hasegawa, Mouad Dahbi, Kei KubotaAbstract:Abstract Highly reversible Potassium intercalatIon into graphite in carbonate ester solutIon at room temperature is achieved by electrochemical reductIon at the potential approaching to K + /K standard potential which is lower than that of Li + /Li. The intercalatIon results in formatIon of stage-1 KC 8 compound with delivering 244 mAh g − 1 of reversible capacity. The initial irreversible capacity is suppressed by polycarboxylate binder compared to poly(vinyledene fluoride) binder. The lower potential, good cyclability, and excellent rate capability are first demonstrated for energy storage applicatIons. Because of the lowest potential and weakest solvatIon among Li + , Na + , K + , Mg 2 + , and Ca 2 + Ion carriers, Potassium shuttlecock mechanism between two insertIon materials as “Potassium-Ion battery” is advantageous for higher-voltage/-power rechargeable batteries. The excellent rate performance is beneficial for the applicatIon to hybrid-type capacitor, “Potassium-Ion capacitor,” as an alternative to lithium-Ion capacitors.
Neeraj Sharma - One of the best experts on this subject based on the ideXlab platform.
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an initial review of the status of electrode materials for Potassium Ion batteries
Advanced Energy Materials, 2017Co-Authors: James C. Pramudita, Divya Sehrawat, Damian Goonetilleke, Neeraj SharmaAbstract:The status of room-temperature Potassium-Ion batteries is reviewed in light of recent concerns regarding the rising cost of lithium and the fact that room-temperature sodium-Ion batteries have yet to be commercialised thus far. Initial reports of Potassium-Ion cells appear promising given the infancy of the research area. This review presents not only an overview of the current Potassium-Ion battery literature, but also attempts to provide context by describing previous developments in lithium-Ion and sodium-Ion batteries and the electrochemical reactIon mechanisms discovered thus far. Perspectives and directIons on the techniques available to characterize newly developed battery materials are also provided based on our experience and knowledge from the literature. It is hoped that through this review, the potential of Potassium-Ion batteries as a competitive energy-storage technology will be realised, and the accessibility and available knowledge of the techniques required to develop the technology will be made apparent.
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Potassium-Ion intercalatIon in graphite within a Potassium-Ion battery examined usingin situX-ray diffractIon
Powder Diffraction, 2017Co-Authors: James C. Pramudita, Vanessa K. Peterson, Justin A. Kimpton, Neeraj SharmaAbstract:Graphite has been widely used as a negative electrode material in lithium-Ion batteries, and recently it has attracted attentIon for its use in Potassium-Ion batteries. In this study, the firstin situX-ray diffractIon characterisatIon of a K/graphite electrochemical cell is performed. Various graphite intercalatIon compounds are found, including the stage three KC36and stage one KC8compounds,along with the disappearance of the graphite during the potassiatIon process. These results show new insights on the non-equilibrium states of Potassium-Ion intercalatIon into graphite in K/graphite electrochemical cells.
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Potassium-Ion intercalatIon in graphite within a Potassium-Ion battery examined using in situ X-ray diffractIon
Powder Diffraction, 2017Co-Authors: James C. Pramudita, Vanessa K. Peterson, Justin A. Kimpton, Neeraj SharmaAbstract:Graphite has been widely used as a negative electrode material in lithium-Ion batteries, and recently it has attracted attentIon for its use in Potassium-Ion batteries. In this study, the first in situ X-ray diffractIon characterisatIon of a K/graphite electrochemical cell is performed. Various graphite intercalatIon compounds are found, including the stage three KC 36 and stage one KC 8 compounds , along with the disappearance of the graphite during the potassiatIon process. These results show new insights on the non-equilibrium states of Potassium-Ion intercalatIon into graphite in K/graphite electrochemical cells.
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An Initial Review of the Status of Electrode Materials for Potassium‐Ion Batteries
Advanced Energy Materials, 2017Co-Authors: James C. Pramudita, Divya Sehrawat, Damian Goonetilleke, Neeraj SharmaAbstract:The status of room-temperature Potassium-Ion batteries is reviewed in light of recent concerns regarding the rising cost of lithium and the fact that room-temperature sodium-Ion batteries have yet to be commercialised thus far. Initial reports of Potassium-Ion cells appear promising given the infancy of the research area. This review presents not only an overview of the current Potassium-Ion battery literature, but also attempts to provide context by describing previous developments in lithium-Ion and sodium-Ion batteries and the electrochemical reactIon mechanisms discovered thus far. Perspectives and directIons on the techniques available to characterize newly developed battery materials are also provided based on our experience and knowledge from the literature. It is hoped that through this review, the potential of Potassium-Ion batteries as a competitive energy-storage technology will be realised, and the accessibility and available knowledge of the techniques required to develop the technology will be made apparent.
James C. Pramudita - One of the best experts on this subject based on the ideXlab platform.
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an initial review of the status of electrode materials for Potassium Ion batteries
Advanced Energy Materials, 2017Co-Authors: James C. Pramudita, Divya Sehrawat, Damian Goonetilleke, Neeraj SharmaAbstract:The status of room-temperature Potassium-Ion batteries is reviewed in light of recent concerns regarding the rising cost of lithium and the fact that room-temperature sodium-Ion batteries have yet to be commercialised thus far. Initial reports of Potassium-Ion cells appear promising given the infancy of the research area. This review presents not only an overview of the current Potassium-Ion battery literature, but also attempts to provide context by describing previous developments in lithium-Ion and sodium-Ion batteries and the electrochemical reactIon mechanisms discovered thus far. Perspectives and directIons on the techniques available to characterize newly developed battery materials are also provided based on our experience and knowledge from the literature. It is hoped that through this review, the potential of Potassium-Ion batteries as a competitive energy-storage technology will be realised, and the accessibility and available knowledge of the techniques required to develop the technology will be made apparent.
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Potassium-Ion intercalatIon in graphite within a Potassium-Ion battery examined usingin situX-ray diffractIon
Powder Diffraction, 2017Co-Authors: James C. Pramudita, Vanessa K. Peterson, Justin A. Kimpton, Neeraj SharmaAbstract:Graphite has been widely used as a negative electrode material in lithium-Ion batteries, and recently it has attracted attentIon for its use in Potassium-Ion batteries. In this study, the firstin situX-ray diffractIon characterisatIon of a K/graphite electrochemical cell is performed. Various graphite intercalatIon compounds are found, including the stage three KC36and stage one KC8compounds,along with the disappearance of the graphite during the potassiatIon process. These results show new insights on the non-equilibrium states of Potassium-Ion intercalatIon into graphite in K/graphite electrochemical cells.
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Potassium-Ion intercalatIon in graphite within a Potassium-Ion battery examined using in situ X-ray diffractIon
Powder Diffraction, 2017Co-Authors: James C. Pramudita, Vanessa K. Peterson, Justin A. Kimpton, Neeraj SharmaAbstract:Graphite has been widely used as a negative electrode material in lithium-Ion batteries, and recently it has attracted attentIon for its use in Potassium-Ion batteries. In this study, the first in situ X-ray diffractIon characterisatIon of a K/graphite electrochemical cell is performed. Various graphite intercalatIon compounds are found, including the stage three KC 36 and stage one KC 8 compounds , along with the disappearance of the graphite during the potassiatIon process. These results show new insights on the non-equilibrium states of Potassium-Ion intercalatIon into graphite in K/graphite electrochemical cells.
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An Initial Review of the Status of Electrode Materials for Potassium‐Ion Batteries
Advanced Energy Materials, 2017Co-Authors: James C. Pramudita, Divya Sehrawat, Damian Goonetilleke, Neeraj SharmaAbstract:The status of room-temperature Potassium-Ion batteries is reviewed in light of recent concerns regarding the rising cost of lithium and the fact that room-temperature sodium-Ion batteries have yet to be commercialised thus far. Initial reports of Potassium-Ion cells appear promising given the infancy of the research area. This review presents not only an overview of the current Potassium-Ion battery literature, but also attempts to provide context by describing previous developments in lithium-Ion and sodium-Ion batteries and the electrochemical reactIon mechanisms discovered thus far. Perspectives and directIons on the techniques available to characterize newly developed battery materials are also provided based on our experience and knowledge from the literature. It is hoped that through this review, the potential of Potassium-Ion batteries as a competitive energy-storage technology will be realised, and the accessibility and available knowledge of the techniques required to develop the technology will be made apparent.