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{"insert":{"user_id":"7000009000","type":"published_papers"},"similar_merge":{"see_also":[{"@id":"https://ci.nii.ac.jp/naid/40020814240/","label":"url"},{"@id":"https://cir.nii.ac.jp/crid/1390860222062203264/","label":"url"},{"@id":"https://web.db.tokushima-u.ac.jp/cgi-bin/edb_browse?EID=336772","label":"url"}],"paper_title":{"en":"Charge compensation analysis of Li-rich layered oxide positive electrode using X-ray absorption fine structure measurement in the soft X-ray region","ja":"軟X 線XAFS によるリチウム過剰層状酸化物正極の電荷補償機構解析"},"authors":{"en":[{"name":"Yamanaka Keisuke"},{"name":"Oishi Masatsugu"},{"name":"Nakanishi Koji"},{"name":"Watanabe Iwao"},{"name":"Ohta Toshiaki"}],"ja":[{"name":"山中 恵介"},{"name":"大石 昌嗣"},{"name":"中西 康次"},{"name":"渡辺 巌"},{"name":"太田 俊明"}]},"publication_date":"2016-03","publication_name":{"en":"Advances in X-Ray Chemical Analysis, Japan","ja":"X線分析の進歩"},"volume":"47","starting_page":"321","ending_page":"330","languages":["jpn"],"referee":true,"identifiers":{"issn":["0911-7806"]},"published_paper_type":"scientific_journal"},"priority":"input_data"}
{"insert":{"user_id":"7000009000","type":"published_papers"},"similar_merge":{"see_also":[{"@id":"https://www.ncbi.nlm.nih.gov/pubmed/25959625","label":"url"},{"@id":"https://www.scopus.com/pages/publications/84930225716","label":"url"},{"@id":"https://web.db.tokushima-u.ac.jp/cgi-bin/edb_browse?EID=312553","label":"url"}],"paper_title":{"en":"Roles of transition metals interchanging with lithium in electrode materials","ja":"Roles of transition metals interchanging with lithium in electrode materials"},"authors":{"en":[{"name":"Kawaguchi Tomoya"},{"name":"Fukuda Katsutoshi"},{"name":"Tokuda Kazuya"},{"name":"Sakaida Masashi"},{"name":"Ichitsubo Tetsu"},{"name":"Oishi Masatsugu"},{"name":"Mizuki Junichiro"},{"name":"Matsubara Eiichiro"}],"ja":[{"name":"Kawaguchi Tomoya"},{"name":"Fukuda Katsutoshi"},{"name":"Tokuda Kazuya"},{"name":"Sakaida Masashi"},{"name":"Ichitsubo Tetsu"},{"name":"大石 昌嗣"},{"name":"Mizuki Junichiro"},{"name":"Matsubara Eiichiro"}]},"description":{"en":"Roles of antisite transition metals interchanging with Li atoms in electrode materials of Li transition-metal complex oxides were clarified using a newly developed direct labeling method, termed powder diffraction anomalous fine structure (P-DAFS) near the Ni K-edge. We site-selectively investigated the valence states and local structures of Ni in Li0.89Ni1.11O2, where Ni atoms occupy mainly the NiO2 host-layer sites and partially the interlayer Li sites in-between the host layers, during electrochemical Li insertion/extraction in a lithium-ion battery (LIB). The site-selective X-ray near edge structure evaluated via the P-DAFS method revealed that the interlayer Ni atoms exhibited much lower electrochemical activity as compared to those at the host-layer site. Furthermore, the present analyses of site-selective extended X-ray absorption fine structure performed using the P-DAFS method indicates local structural changes around the residual Ni atoms at the interlayer space during the initial charge; it tends to gather to form rock-salt NiO-like domains around the interlayer Ni. The presence of the NiO-like domains in the interlayer space locally diminishes the interlayer distance and would yield strain energy because of the lattice mismatch, which retards the subsequent Li insertion both thermodynamically and kinetically. Such restrictions on the Li insertion inevitably make the NiO-like domains electrochemically inactive, resulting in an appreciable irreversible capacity after the initial charge but an achievement of robust linkage of neighboring NiO2 layers that tend to be dissociated without the Li occupation. The P-DAFS characterization of antisite transition metals interchanging with Li atoms complements the understanding of the detailed charge-compensation and degradation mechanisms in the electrode materials.","ja":"Roles of antisite transition metals interchanging with Li atoms in electrode materials of Li transition-metal complex oxides were clarified using a newly developed direct labeling method, termed powder diffraction anomalous fine structure (P-DAFS) near the Ni K-edge. We site-selectively investigated the valence states and local structures of Ni in Li0.89Ni1.11O2, where Ni atoms occupy mainly the NiO2 host-layer sites and partially the interlayer Li sites in-between the host layers, during electrochemical Li insertion/extraction in a lithium-ion battery (LIB). The site-selective X-ray near edge structure evaluated via the P-DAFS method revealed that the interlayer Ni atoms exhibited much lower electrochemical activity as compared to those at the host-layer site. Furthermore, the present analyses of site-selective extended X-ray absorption fine structure performed using the P-DAFS method indicates local structural changes around the residual Ni atoms at the interlayer space during the initial charge; it tends to gather to form rock-salt NiO-like domains around the interlayer Ni. The presence of the NiO-like domains in the interlayer space locally diminishes the interlayer distance and would yield strain energy because of the lattice mismatch, which retards the subsequent Li insertion both thermodynamically and kinetically. Such restrictions on the Li insertion inevitably make the NiO-like domains electrochemically inactive, resulting in an appreciable irreversible capacity after the initial charge but an achievement of robust linkage of neighboring NiO2 layers that tend to be dissociated without the Li occupation. The P-DAFS characterization of antisite transition metals interchanging with Li atoms complements the understanding of the detailed charge-compensation and degradation mechanisms in the electrode materials."},"publication_date":"2015-06","publication_name":{"en":"Physical Chemistry Chemical Physics","ja":"Physical Chemistry Chemical Physics"},"volume":"17","number":"21","starting_page":"14064","ending_page":"14070","languages":["eng"],"referee":true,"identifiers":{"doi":["10.1039/c5cp00940e"],"issn":["1463-9084"]},"published_paper_type":"scientific_journal"},"priority":"input_data"}
{"insert":{"user_id":"7000009000","type":"published_papers"},"similar_merge":{"see_also":[{"@id":"https://www.scopus.com/pages/publications/84916912213","label":"url"},{"@id":"https://web.db.tokushima-u.ac.jp/cgi-bin/edb_browse?EID=312555","label":"url"}],"paper_title":{"en":"Structural modification by adding Li cations into Mg/Cs-TFSA molten salt facilitating Mg electrodeposition","ja":"Structural modification by adding Li cations into Mg/Cs-TFSA molten salt facilitating Mg electrodeposition"},"authors":{"en":[{"name":"Ohara Koji"},{"name":"Umebayashi Yasuhiro"},{"name":"Ichitsubo Tetsu"},{"name":"Matsumoto Kazuhiko"},{"name":"Hagiwara Rika"},{"name":"Arai Hajime"},{"name":"Mori Masahiro"},{"name":"Orikasa Yuki"},{"name":"Okamoto Shinya"},{"name":"Oishi Masatsugu"},{"name":"Aiso Yuka"},{"name":"Nohira Toshiyuki"},{"name":"Uchimoto Yoshiharu"},{"name":"Ogumi Zempachi"},{"name":"Matsubara Eiichiro"}],"ja":[{"name":"Ohara Koji"},{"name":"Umebayashi Yasuhiro"},{"name":"Ichitsubo Tetsu"},{"name":"Matsumoto Kazuhiko"},{"name":"Hagiwara Rika"},{"name":"Arai Hajime"},{"name":"Mori Masahiro"},{"name":"Orikasa Yuki"},{"name":"Okamoto Shinya"},{"name":"大石 昌嗣"},{"name":"Aiso Yuka"},{"name":"Nohira Toshiyuki"},{"name":"Uchimoto Yoshiharu"},{"name":"Ogumi Zempachi"},{"name":"Matsubara Eiichiro"}]},"publication_date":"2015","publication_name":{"en":"RSC Advances","ja":"RSC Advances"},"volume":"5","starting_page":"3063","ending_page":"3069","languages":["eng"],"referee":true,"identifiers":{"doi":["10.1039/c4ra13244k"],"issn":["2046-2069"]},"published_paper_type":"scientific_journal"},"priority":"input_data"}
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{"insert":{"user_id":"7000009000","type":"published_papers"},"similar_merge":{"see_also":[{"@id":"https://www.ncbi.nlm.nih.gov/pubmed/24611637","label":"url"},{"@id":"https://web.db.tokushima-u.ac.jp/cgi-bin/edb_browse?EID=312559","label":"url"}],"paper_title":{"en":"Three-dimensional nano electrode by metal nanowire nonwoven clothes","ja":"Three-dimensional nano electrode by metal nanowire nonwoven clothes"},"authors":{"en":[{"name":"Kawamori Makoto"},{"name":"Asai Takahiro"},{"name":"Shirai Yoshimasa"},{"name":"Yagi Shunsuke"},{"name":"Oishi Masatsugu"},{"name":"Ichitsubo Tetsu"},{"name":"Matsubara Eiichiro"}],"ja":[{"name":"Kawamori Makoto"},{"name":"Asai Takahiro"},{"name":"Shirai Yoshimasa"},{"name":"Yagi Shunsuke"},{"name":"大石 昌嗣"},{"name":"Ichitsubo Tetsu"},{"name":"Matsubara Eiichiro"}]},"description":{"en":"Metal nanowire nonwoven cloth (MNNC) is a metal sheet that has resulted from intertwined metal nanowires 100 nm in diameter with several dozen micrometers of length. Thus, it is a new metallic material having both a flexibility of the metal sheet and a large specific surface area of the nanowires. As an application that utilizes these properties, we propose a high-cyclability electrode for Li storage batteries, in which an active material is deposited or coated on MNNC. The proposed electrode can work without any binders, conductive additives, and current collectors, which might largely improve a practical gravimetric energy density. Huge electrode surfaces provide efficient ion/electron transports, and sufficient interspaces between the respective nanowires accommodate large volume expansions of the active material. To demonstrate these advantages, we have fabricated a NiO-covered nickel nanowire nonwoven cloth (NNNC) by electroless deposition under a magnetic field and annealing in air. The adequately annealed NNNC was shown to be an excellent conversion-type electrode that exhibits a quite high cyclability, 500 mAh/g at 1 C after 300 cycles, compared to that of a composite electrode consisting of NiO nanoparticles. Thus, the present design concept will contribute to a game-changing technology in future lithium ion battery (LIB) electrodes.","ja":"Metal nanowire nonwoven cloth (MNNC) is a metal sheet that has resulted from intertwined metal nanowires 100 nm in diameter with several dozen micrometers of length. Thus, it is a new metallic material having both a flexibility of the metal sheet and a large specific surface area of the nanowires. As an application that utilizes these properties, we propose a high-cyclability electrode for Li storage batteries, in which an active material is deposited or coated on MNNC. The proposed electrode can work without any binders, conductive additives, and current collectors, which might largely improve a practical gravimetric energy density. Huge electrode surfaces provide efficient ion/electron transports, and sufficient interspaces between the respective nanowires accommodate large volume expansions of the active material. To demonstrate these advantages, we have fabricated a NiO-covered nickel nanowire nonwoven cloth (NNNC) by electroless deposition under a magnetic field and annealing in air. The adequately annealed NNNC was shown to be an excellent conversion-type electrode that exhibits a quite high cyclability, 500 mAh/g at 1 C after 300 cycles, compared to that of a composite electrode consisting of NiO nanoparticles. Thus, the present design concept will contribute to a game-changing technology in future lithium ion battery (LIB) electrodes."},"publication_date":"2014-03-11","publication_name":{"en":"Nano Letters","ja":"Nano Letters"},"volume":"14","number":"4","starting_page":"1932","ending_page":"1937","languages":["eng"],"referee":true,"identifiers":{"doi":["10.1021/nl404753e"],"issn":["1530-6992"]},"published_paper_type":"scientific_journal"},"priority":"input_data"}
{"insert":{"user_id":"7000009000","type":"published_papers"},"similar_merge":{"see_also":[{"@id":"https://www.scopus.com/pages/publications/84904816334","label":"url"},{"@id":"https://web.db.tokushima-u.ac.jp/cgi-bin/edb_browse?EID=312558","label":"url"}],"paper_title":{"en":"Electrochemical behavior of magnesium alloys in alkali metal-TFSA ionic liquid for magnesium-battery negative electrode","ja":"Electrochemical behavior of magnesium alloys in alkali metal-TFSA ionic liquid for magnesium-battery negative electrode"},"authors":{"en":[{"name":"Oishi Masatsugu"},{"name":"Ichitsubo Tetsu"},{"name":"Okamoto Shinya"},{"name":"Matsubara Eiichiro"},{"name":"Nohira Toshiyuki"},{"name":"Hagiwara Rika"}],"ja":[{"name":"大石 昌嗣"},{"name":"Ichitsubo Tetsu"},{"name":"Okamoto Shinya"},{"name":"Matsubara Eiichiro"},{"name":"Nohira Toshiyuki"},{"name":"Hagiwara Rika"}]},"publication_date":"2014","publication_name":{"en":"Journal of the Electrochemical Society","ja":"Journal of the Electrochemical Society"},"volume":"161","starting_page":"A943","ending_page":"A947","languages":["eng"],"referee":true,"identifiers":{"doi":["10.1149/2.043406jes"],"issn":["0013-4651"]},"published_paper_type":"scientific_journal"},"priority":"input_data"}
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{"insert":{"user_id":"7000009000","type":"published_papers"},"similar_merge":{"see_also":[{"@id":"https://www.scopus.com/pages/publications/84877317728","label":"url"},{"@id":"https://web.db.tokushima-u.ac.jp/cgi-bin/edb_browse?EID=312577","label":"url"}],"paper_title":{"en":"In situ two-dimensional micro-imaging XAFS with CCD detector","ja":"In situ two-dimensional micro-imaging XAFS with CCD detector"},"authors":{"en":[{"name":"Tanida Hajime"},{"name":"Yamashige Hisao"},{"name":"Orikasa Yuki"},{"name":"Fujimoto Takahiro"},{"name":"Oishi Masatsugu"},{"name":"Murayama Haruno"},{"name":"Arai Hajime"},{"name":"Katayama Misaki"},{"name":"Inada Yasuhiro"},{"name":"Ohta Toshiaki"},{"name":"Uchimoto Yoshiharu"},{"name":"Ogumi Zempachi"}],"ja":[{"name":"Tanida Hajime"},{"name":"Yamashige Hisao"},{"name":"Orikasa Yuki"},{"name":"Fujimoto Takahiro"},{"name":"大石 昌嗣"},{"name":"Murayama Haruno"},{"name":"Arai Hajime"},{"name":"Katayama Misaki"},{"name":"Inada Yasuhiro"},{"name":"Ohta Toshiaki"},{"name":"Uchimoto Yoshiharu"},{"name":"Ogumi Zempachi"}]},"publication_date":"2013","publication_name":{"en":"Journal of Physics: Conference Series","ja":"Journal of Physics: Conference Series"},"volume":"430","starting_page":"012021","ending_page":"012021","languages":["eng"],"referee":true,"identifiers":{"doi":["10.1088/1742-6596/430/1/012021"],"issn":["1742-6596"]},"published_paper_type":"scientific_journal"},"priority":"input_data"}
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{"insert":{"user_id":"7000009000","type":"published_papers"},"similar_merge":{"see_also":[{"@id":"https://www.scopus.com/pages/publications/84876562870","label":"url"},{"@id":"https://web.db.tokushima-u.ac.jp/cgi-bin/edb_browse?EID=312560","label":"url"}],"paper_title":{"en":"Elastically constrained phase-separation dynamics competing with charge process in LiFePO4/FePO4 system","ja":"Elastically constrained phase-separation dynamics competing with charge process in LiFePO4/FePO4 system"},"authors":{"en":[{"name":"Ichitsubo Tetsu"},{"name":"Tokuda Kazuya"},{"name":"Yagi Shunsuke"},{"name":"Kawamori Makoto"},{"name":"Kawaguchi Tomoya"},{"name":"Doi Takayuki"},{"name":"Oishi Masatsugu"},{"name":"Matsubara Eiichiro"}],"ja":[{"name":"Ichitsubo Tetsu"},{"name":"Tokuda Kazuya"},{"name":"Yagi Shunsuke"},{"name":"Kawamori Makoto"},{"name":"Kawaguchi Tomoya"},{"name":"Doi Takayuki"},{"name":"大石 昌嗣"},{"name":"Matsubara Eiichiro"}]},"publication_date":"2013","publication_name":{"en":"Journal of Materials Chemistry. A, Materials for Energy and Sustainability","ja":"Journal of Materials Chemistry. A, Materials for Energy and Sustainability"},"volume":"1","number":"7","starting_page":"2567","ending_page":"2577","languages":["eng"],"referee":true,"identifiers":{"doi":["10.1039/c2ta01102f"],"issn":["2050-7488"]},"published_paper_type":"scientific_journal"},"priority":"input_data"}
{"insert":{"user_id":"7000009000","type":"published_papers"},"similar_merge":{"see_also":[{"@id":"https://www.ncbi.nlm.nih.gov/pubmed/21850304","label":"url"},{"@id":"https://www.scopus.com/pages/publications/80052537863","label":"url"},{"@id":"https://web.db.tokushima-u.ac.jp/cgi-bin/edb_browse?EID=312564","label":"url"}],"paper_title":{"en":"An X-ray Absorption Spectroscopic Study on Mixed Conductive La0.6Sr0.4Co0.8Fe0.2O3- Cathodes I. Electrical Conductivity and Electronic Structure","ja":"An X-ray Absorption Spectroscopic Study on Mixed Conductive La0.6Sr0.4Co0.8Fe0.2O3- Cathodes I. Electrical Conductivity and Electronic Structure"},"authors":{"en":[{"name":"Orikasa Yuki"},{"name":"Ina Toshiaki"},{"name":"Nakao Takayuki"},{"name":"Mineshige Atsushi"},{"name":"Amezawa Koji"},{"name":"Oishi Masatsugu"},{"name":"Arai Hajime"},{"name":"Ogumi Zempachi"},{"name":"Uchimoto Yoshiharu"}],"ja":[{"name":"Orikasa Yuki"},{"name":"Ina Toshiaki"},{"name":"Nakao Takayuki"},{"name":"Mineshige Atsushi"},{"name":"Amezawa Koji"},{"name":"大石 昌嗣"},{"name":"Arai Hajime"},{"name":"Ogumi Zempachi"},{"name":"Uchimoto Yoshiharu"}]},"description":{"en":"The electrical conduction mechanism of mixed conductive perovskite oxides, La(0.6)Sr(0.4)Co(0.8)Fe(0.2)O(3-δ), for cathode materials of solid oxide fuel cells has been investigated from electronic structural changes during oxygen vacancy formation. La(0.6)Sr(0.4)Co(0.8)Fe(0.2)O(3-δ) was annealed under various oxygen partial pressures p(O(2))s at 1073 K and quenched. Iodometric titration indicated that the oxygen nonstoichiometry of La(0.6)Sr(0.4)Co(0.8)Fe(0.2)O(3-δ) depended on the annealing p(O(2)), with more oxygen vacancies introduced at lower than at higher p(O(2))s. X-Ray absorption spectroscopic measurements were performed at the O K-, Co L-, Fe L-, Co K-, and Fe K-edges. The valence states of the Co and Fe ions were investigated by the X-ray absorption near edge structure (XANES) at the Co and Fe L(III)-edges. While the Fe average valence was almost constant, the valence of the Co ions decreased with oxygen vacancy introduction. The O K-edge XANES spectra indicated that electrons were injected into the Co 3d/O 2p hybridization state with oxygen vacancy introduction. Both absorption edges at the Co and Fe K-edge XANES shifted towards lower energies with oxygen vacancy introduction. The shift at the Co K-edge resulted from the decrease in the Co average valence and that at the Fe K-edge appeared to be caused by changes in the coordination environment around the Fe ions. The total conductivity of La(0.6)Sr(0.4)Co(0.8)Fe(0.2)O(3-δ) decreased with decreasing p(O(2)), due to a decreasing hole concentration.","ja":"The electrical conduction mechanism of mixed conductive perovskite oxides, La(0.6)Sr(0.4)Co(0.8)Fe(0.2)O(3-δ), for cathode materials of solid oxide fuel cells has been investigated from electronic structural changes during oxygen vacancy formation. La(0.6)Sr(0.4)Co(0.8)Fe(0.2)O(3-δ) was annealed under various oxygen partial pressures p(O(2))s at 1073 K and quenched. Iodometric titration indicated that the oxygen nonstoichiometry of La(0.6)Sr(0.4)Co(0.8)Fe(0.2)O(3-δ) depended on the annealing p(O(2)), with more oxygen vacancies introduced at lower than at higher p(O(2))s. X-Ray absorption spectroscopic measurements were performed at the O K-, Co L-, Fe L-, Co K-, and Fe K-edges. The valence states of the Co and Fe ions were investigated by the X-ray absorption near edge structure (XANES) at the Co and Fe L(III)-edges. While the Fe average valence was almost constant, the valence of the Co ions decreased with oxygen vacancy introduction. The O K-edge XANES spectra indicated that electrons were injected into the Co 3d/O 2p hybridization state with oxygen vacancy introduction. Both absorption edges at the Co and Fe K-edge XANES shifted towards lower energies with oxygen vacancy introduction. The shift at the Co K-edge resulted from the decrease in the Co average valence and that at the Fe K-edge appeared to be caused by changes in the coordination environment around the Fe ions. The total conductivity of La(0.6)Sr(0.4)Co(0.8)Fe(0.2)O(3-δ) decreased with decreasing p(O(2)), due to a decreasing hole concentration."},"publication_date":"2011-10","publication_name":{"en":"Physical Chemistry Chemical Physics","ja":"Physical Chemistry Chemical Physics"},"volume":"13","number":"37","starting_page":"16637","ending_page":"16643","languages":["eng"],"referee":true,"identifiers":{"doi":["10.1039/C1CP20982E"],"issn":["1463-9084"]},"published_paper_type":"scientific_journal"},"priority":"input_data"}
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{"insert":{"user_id":"7000009000","type":"published_papers"},"similar_merge":{"see_also":[{"@id":"https://web.db.tokushima-u.ac.jp/cgi-bin/edb_browse?EID=312568","label":"url"}],"paper_title":{"en":"Electrical conductivity and chemical diffusion in Perovskite-type proton conductors in H2H2O gas mixtures","ja":"Electrical conductivity and chemical diffusion in Perovskite-type proton conductors in H2H2O gas mixtures"},"authors":{"en":[{"name":"Yashiro Keiji"},{"name":"Akoshima Satoshi"},{"name":"Kudo Takao"},{"name":"Oishi Masatsugu"},{"name":"Matsumoto Hiroshige"},{"name":"Sato Kazuhisa"},{"name":"Kawada Tatsuya"},{"name":"Mizusaki Junichiro"}],"ja":[{"name":"Yashiro Keiji"},{"name":"Akoshima Satoshi"},{"name":"Kudo Takao"},{"name":"大石 昌嗣"},{"name":"Matsumoto Hiroshige"},{"name":"Sato Kazuhisa"},{"name":"Kawada Tatsuya"},{"name":"Mizusaki Junichiro"}]},"publication_date":"2011","publication_name":{"en":"Solid State Ionics","ja":"Solid State Ionics"},"volume":"192","number":"1","starting_page":"76","ending_page":"82","languages":["eng"],"referee":true,"identifiers":{"doi":["10.1016/j.ssi.2010.03.011"],"issn":["0167-2738"]},"published_paper_type":"scientific_journal"},"priority":"input_data"}
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