Search Results - "KUBOTA, Kei"

Towards K‐Ion and Na‐Ion Batteries as “Beyond Li‐Ion” by Kubota, Kei, Dahbi, Mouad, Hosaka, Tomooki, Kumakura, Shinichi, Komaba, Shinichi

“…Li‐ion battery commercialized by Sony in 1991 has the highest energy‐density among practical rechargeable batteries and is widely used in electronic devices,…”
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Impact of Ti and Zn Dual‐Substitution in P2 Type Na2/3Ni1/3Mn2/3O2 on Ni–Mn and Na‐Vacancy Ordering and Electrochemical Properties by Kubota, Kei, Asari, Takuya, Komaba, Shinichi

“…High‐entropy layered oxide materials containing various metals that exhibit smooth voltage curves and excellent electrochemical performances have attracted…”
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Electrochemistry and Solid‐State Chemistry of NaMeO2 (Me = 3d Transition Metals) by Kubota, Kei, Kumakura, Shinichi, Yoda, Yusuke, Kuroki, Kazutoshi, Komaba, Shinichi

“…Sodium 3d transition metal oxides for Na‐ion batteries have attracted attention of battery researchers because of their new chemistries and abundant material…”
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Sodium and Manganese Stoichiometry of P2-Type Na2/3MnO2 by Kumakura, Shinichi, Tahara, Yoshiyuki, Kubota, Kei, Chihara, Kuniko, Komaba, Shinichi

“…To realize a reversible solid‐state MnIII/IV redox couple in layered oxides, co‐operative Jahn–Teller distortion (CJTD) of six‐coordinate MnIII (t2g3–eg1) is a…”
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MgO‐Template Synthesis of Extremely High Capacity Hard Carbon for Na‐Ion Battery by Kamiyama, Azusa, Kubota, Kei, Igarashi, Daisuke, Youn, Yong, Tateyama, Yoshitaka, Ando, Hideka, Gotoh, Kazuma, Komaba, Shinichi

“…Extremely high capacity hard carbon for Na‐ion battery, delivering 478 mAh g−1, is successfully synthesized by heating a freeze‐dried mixture of magnesium…”
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Polyanionic Compounds for Potassium‐Ion Batteries by Hosaka, Tomooki, Shimamura, Tomoaki, Kubota, Kei, Komaba, Shinichi

“…Lithium‐ion batteries have the highest energy density among practical secondary batteries and are widely used for electronic devices, electric vehicles, and…”
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P′2-Na2/3Mn0.9Me0.1O2 (Me = Mg, Ti, Co, Ni, Cu, and Zn): Correlation between Orthorhombic Distortion and Electrochemical Property by Kumakura, Shinichi, Tahara, Yoshiyuki, Sato, Syuhei, Kubota, Kei, Komaba, Shinichi

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Development of KPF6/KFSA Binary-Salt Solutions for Long-Life and High-Voltage K‑Ion Batteries by Hosaka, Tomooki, Matsuyama, Tatsuo, Kubota, Kei, Yasuno, Satoshi, Komaba, Shinichi

“…A series of binary-salt electrolytes of KPF6/KN­(SO2F)2 (KFSA) in carbonate ester solvents have been developed for high-voltage K-ion batteries by clarifying…”
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Electrochemistry and Solid-State Chemistry of Layered Oxides for Li-, Na-, and K-Ion Batteries by KUBOTA, Kei

“…Since reversible lithium (de)intercalation of layered LiCoO2 and its high-voltage operation were discovered by Mizushima, Goodenough, and coworkers in 1980,…”
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New O2/P2-type Li-Excess Layered Manganese Oxides as Promising Multi-Functional Electrode Materials for Rechargeable Li/Na Batteries by Yabuuchi, Naoaki, Hara, Ryo, Kajiyama, Masataka, Kubota, Kei, Ishigaki, Toru, Hoshikawa, Akinori, Komaba, Shinichi

“…A new and promising P2‐type layered oxide, Na5/6[Li1/4Mn3/4]O2 is prepared using a solid‐state method. Detailed crystal structures of the sample are analyzed…”
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Understanding Particle-Size-Dependent Electrochemical Properties of Li2MnO3‑Based Positive Electrode Materials for Rechargeable Lithium Batteries by Yabuuchi, Naoaki, Kubota, Kei, Aoki, Yoshinori, Komaba, Shinichi

“…Electrochemical properties of Li-excess electrode materials, Li1.2Co0.13Ni0.13Mn0.54O2, with different primary particle sizes are studied in Li cells, and…”
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Concentration Effect of Fluoroethylene Carbonate on the Formation of Solid Electrolyte Interphase Layer in Sodium-Ion Batteries by Bouibes, Amine, Takenaka, Norio, Fujie, Takuya, Kubota, Kei, Komaba, Shinichi, Nagaoka, Masataka

“…Fluoroethylene carbonate (FEC) is an effective additive to improve the performance of Na-ion batteries (NIB). A recent experimental study has shown that a…”
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Understanding the Structural Evolution and Redox Mechanism of a NaFeO2-NaCoO2 Solid Solution for Sodium-Ion Batteries by Kubota, Kei, Asari, Takuya, Yoshida, Hiroaki, Yaabuuchi, Naoaki, Shiiba, Hiromasa, Nakayama, Masanobu, Komaba, Shinichi

“…Na‐ion batteries have become promising candidates for large‐scale energy‐storage systems because of the abundant Na resources and they have attracted…”
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High-Capacity Hard Carbon Synthesized from Macroporous Phenolic Resin for Sodium-Ion and Potassium-Ion Battery by Kamiyama, Azusa, Kubota, Kei, Nakano, Takeshi, Fujimura, Shun, Shiraishi, Soshi, Tsukada, Hidehiko, Komaba, Shinichi

“…Hard carbon is synthesized by heat-treating macroporous phenolic resin at different temperatures. We study influences of temperature on the structures and…”
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Enhanced Electrochemical Properties of KTiOPO4–rGO Negative Electrode for Sodium and Potassium Ion Batteries by Kumar, Petla Ramesh, Kubota, Kei, Igarashi, Daisuke, Komaba, Shinichi

“…Potassium titanyl phosphate (KTiOPO4) is a well-known material for nonlinear optical device applications, but its electrochemical properties are not yet well…”
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Application of modified styrene-butadiene-rubber-based latex binder to high-voltage operating LiCoO2 composite electrodes for lithium-ion batteries by Isozumi, Hayata, Horiba, Tatsuo, Kubota, Kei, Hida, Kazuo, Matsuyama, Takashi, Yasuno, Satoshi, Komaba, Shinichi

“…Styrene-butadiene rubber (SBR) is modified either by changing the degree of cross linkage, or by the partial substitution of acrylonitrile for styrene. Four…”
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Development of advanced electrolytes in Na-ion batteries: application of the Red Moon method for molecular structure design of the SEI layer by Bouibes, Amine, Takenaka, Norio, Kubota, Kei, Komaba, Shinichi, Nagaoka, Masataka

“…This review aims to overview state-of-the-art progress in the collaborative work between theoretical and experimental scientists to develop advanced…”
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Black Phosphorus as a High-Capacity, High-Capability Negative Electrode for Sodium-Ion Batteries: Investigation of the Electrode/Electrolyte Interface by Dahbi, Mouad, Yabuuchi, Naoaki, Fukunishi, Mika, Kubota, Kei, Chihara, Kuniko, Tokiwa, Kazuyasu, Yu, Xue-fang, Ushiyama, Hiroshi, Yamashita, Koichi, Son, Jin-Young, Cui, Yi-Tao, Oji, Hiroshi, Komaba, Shinichi

“…For a nonaqueous sodium-ion battery (NIB), phosphorus materials have been studied as the highest-capacity negative electrodes. However, the large volume change…”
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Thermal Stability of NaxCrO2 for Rechargeable Sodium Batteries; Studies by High-Temperature Synchrotron X-ray Diffraction by Yabuuchi, Naoaki, Ikeuchi, Issei, Kubota, Kei, Komaba, Shinichi

“…Thermal stability and phase transition processes of NaCrO2 and Na0.5CrO2 are carefully examined by high-temperature synchrotron X-ray diffraction method…”
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Active material and interphase structures governing performance in sodium and potassium ion batteries by Kim, Eun Jeong, Kumar, P. Ramesh, Gossage, Zachary T, Kubota, Kei, Hosaka, Tomooki, Tatara, Ryoichi, Komaba, Shinichi

“…Development of energy storage systems is a topic of broad societal and economic relevance, and lithium ion batteries (LIBs) are currently the most advanced…”
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