Control of physical properties in transition-metal oxides by electrochemical doping

• Project/Area Number: 23684022
• Research Category: Grant-in-Aid for Young Scientists (A)
• Allocation Type: Single-year Grants
• Research Field: Condensed matter physics II
• Research Institution: University of Tsukuba
• Principal Investigator: KOBAYASHI Wataru 筑波大学, 数理物質系, 助教 (70434313)
• Research Collaborator: MORITOMO Yutaka 筑波大学, 数理物質系, 教授 (00283466) ; SHIBATA Takayuki 筑波大学, 数理物質系, 研究員 (30758264)
• Project Period (FY): 2011-04-01 – 2015-03-31
• Project Status: Completed (Fiscal Year 2014)
• Budget Amount: ¥27,950,000 (Direct Cost: ¥21,500,000、Indirect Cost: ¥6,450,000); Fiscal Year 2014: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000); Fiscal Year 2013: ¥7,410,000 (Direct Cost: ¥5,700,000、Indirect Cost: ¥1,710,000); Fiscal Year 2012: ¥6,890,000 (Direct Cost: ¥5,300,000、Indirect Cost: ¥1,590,000); Fiscal Year 2011: ¥10,920,000 (Direct Cost: ¥8,400,000、Indirect Cost: ¥2,520,000)
• Keywords: 強相関電子 / ナトリウムイオン電池 / 酸化物エレクトロニクス / ナノエレクトロニクス / 薄膜 / 超伝導 / イオン拡散 / 高速充放電 / リチウムイオン二次電池

Outline of Final Research Achievements

We have developed novel materials by using electrochemical doping. We have found that NaxMO2 (M=Mn, Co) exhibits larger diffusion coefficient (D) than that of LiCoO2, which realizes a sodium-ion-secondary battery with high rate properties. A Li+ intercalation into Bi2Sr2CaCu2O8+d causes a clear enhancement of superconducting transition temperature from 75 K to 90 K. We have also invented thermo-electrochemical cell (thermocell) that converts heat into electrocity by electrochemical Seebeck effect.

Research Products

• [Journal Article] Fast discharge process of layered cobalt oxides due to high Na+ diffusion (2015)
  • Author(s): T. Shibata, Y. Fukuzumi, W. Kobayashi, and Y. Moritomo
  • Journal Title: Sci. Rep. Volume: 5 Issue: 1 Pages: 9006-9006
  • DOI: 10.1038/srep09006
  • NAID: 120007130325
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] Erratum: "Sodium Ion Diffusion in Layered NaxCoO2 (2015)
  • Author(s): T. Shibata, W. Kobayashi, and Y. Moritomo
  • Journal Title: Appl. Phys. Express Volume: 8 Issue: 2 Pages: 029201-029201
  • DOI: 10.7567/apex.8.029201
  • NAID: 210000137413
  • Peer Reviewed
• [Journal Article] Erratum: "Sodium ion diffusion in layered NaxMnO2 (0.49<= x <=0.75): Comparison with NaxCoO2 (2015)
  • Author(s): T. Shibata, W. Kobayashi, and Y. Moritomo
  • Journal Title: Appl. Phys. Express Volume: 8 Issue: 2 Pages: 029202-029202
  • DOI: 10.7567/apex.8.029202
  • NAID: 210000137414
• [Journal Article] Ionic model approach to battery voltage of NaMO2 (2014)
  • Author(s): W. Kobayashi, and Y. Moritomo
  • Journal Title: J. Phys. Soc. Jpn. Volume: 83 Issue: 10 Pages: 104712-104712
  • DOI: 10.7566/jpsj.83.104712
  • NAID: 210000133312
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Sodium ion diffusion in layered NaxMnO2 (0.49<= x <=0.75): Comparison with NaxCoO2 (2014)
  • Author(s): T. Shibata, W. Kobayashi, and Y. Moritomo
  • Journal Title: Appl. Phys. Express Volume: 7 Issue: 6 Pages: 067101-067101
  • DOI: 10.7567/apex.7.067101
  • NAID: 210000137146
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Thermal response of sodium ion state in NaMO2 (M=Cr and Fe) (2014)
  • Author(s): D. Tanabe, T. Shimono, W. Kobayashi, and Y. Moritomo
  • Journal Title: Physica Status Solidi (RRL) Volume: 8 Issue: 3 Pages: 287-287
  • DOI: 10.1002/pssr.201308295
  • Peer Reviewed
• [Journal Article] Structural Response of P2-Type NaxMnO2 against Na+ Intercalation (2013)
  • Author(s): T. Shimono, D. Tanabe, W. Kobayashi, and Y. Moritomo
  • Journal Title: J. Phys. Soc. Jpn. Volume: 82 Issue: 8 Pages: 83601-83601
  • DOI: 10.7566/jpsj.82.083601
  • NAID: 210000132673
  • Peer Reviewed
• [Journal Article] Sodium ion diffusion in NaxCoO2 (2013)
  • Author(s): T. Shibata, W. Kobayashi, and Y. Moritomo
  • Journal Title: Appl. Phys. Express Volume: 6 Issue: 9 Pages: 97101-97101
  • DOI: 10.7567/apex.6.097101
  • Peer Reviewed
• [Journal Article] Na-site energy of P2-type NaxMO2 (M=Mn and Co) (2013)
  • Author(s): D. Tanabe, T. Shimono, W. Kobayashi, and Y. Moritomo
  • Journal Title: Physica Status Solidi (RRL) Volume: 7 Issue: 12 Pages: 1097-1097
  • DOI: 10.1002/pssr.201308101
  • Peer Reviewed
• [Journal Article] Electronic State of NaxMO2 (M = Mn and Co) against x (2013)
  • Author(s): T. Shimono, D. Tanabe, W. Kobayashi, H. Nitani, and Y. Moritomo
  • Journal Title: J. Phys. Soc. Jpn. Volume: 82 Issue: 12 Pages: 124717-124717
  • DOI: 10.7566/jpsj.82.124717
  • Peer Reviewed
• [Journal Article] Intrinsic rapid Na+ intercalation observed in NaxCoO2 thin film (2013)
  • Author(s): T. Shibata, W. Kobayashi, and Y. Moritomo
  • Journal Title: AIP Advances Volume: 3 Issue: 3 Pages: 32104-32104
  • DOI: 10.1063/1.4794719
  • Peer Reviewed
• [Journal Article] Electrochemical lithium intercalation into Bi2Sr2CaCu2O8+d (2013)
  • Author(s): Takahiro Shimono
  • Journal Title: J. Phys.:Conf. Ser. Volume: 428 Pages: 12021-12021
  • DOI: 10.1088/1742-6596/428/1/012021
  • Peer Reviewed
• [Presentation] P2型NaxMO2の結晶構造の温度依存性 (2015)
  • Author(s): 赤羽 隆弘、柳田 歩、小林 航、守友 浩
  • Organizer: 第62回応用物理学会春季学術講演会
  • Place of Presentation: 東海大学湘南キャンパス
  • Year and Date: 2015-03-11 – 2015-03-14
• [Presentation] P2型NaxCoO2薄膜電極の放電曲線のレート依存性 (2015)
  • Author(s): 柳田 歩、柴田 恭幸、小林 航、守友 浩
  • Organizer: 第62回応用物理学会春季学術講演会
  • Place of Presentation: 東海大学湘南キャンパス
  • Year and Date: 2015-03-11 – 2015-03-14
• [Presentation] NaxMO2 (M=Co, Mn)薄膜における電気化学特性 (2014)
  • Author(s): 柴田恭幸、小林 航、守友浩
  • Organizer: 第55回電池討論会
  • Place of Presentation: 国立京都国際会館（京都市）
  • Year and Date: 2014-11-19 – 2014-11-21
• [Presentation] イオンモデルによるO3型層状酸化物の電位の考察 (2014)
  • Author(s): 小林 航、守友浩
  • Organizer: 第55回電池討論会
  • Place of Presentation: 国立京都国際会館（京都市）
  • Year and Date: 2014-11-19 – 2014-11-21
• [Presentation] O3型NaCoO2薄膜の電気化学特性 (2014)
  • Author(s): 柴田恭幸、小林 航、守友浩
  • Organizer: 第75回応用物理学会秋季学術講演会
  • Place of Presentation: 北海道大学札幌キャンパス
  • Year and Date: 2014-09-17 – 2014-09-20
• [Presentation] 遷移金属酸化物へのリチウムドーピングによる物性制御 (2011)
  • Author(s): 小林航
  • Organizer: 第1回連携研究会(筑波大学・KEK連携事業)
  • Place of Presentation: 筑波大学
  • Year and Date: 2011-10-01
• [Presentation] NaxMnO2におけるナトリウムイオン拡散
  • Author(s): 柴田恭幸、小林 航、守友浩
  • Organizer: 第61回応用物理学会春季学術講演会
  • Place of Presentation: 青山学院大学
• [Presentation] NaxMn0.5Co0.5O2のナトリウム濃度と結晶構造
  • Author(s): 下野貴弘,赤羽隆弘, 棚辺大輝,小林 航, 守友浩
  • Organizer: 日本物理学会 第69回年次大会
  • Place of Presentation: 東海大学平塚キャンパス
• [Presentation] Na0.7Mn0.5M0.5O2(M=Co,Fe)の構造解析
  • Author(s): 小林 航, 赤羽隆弘, 棚辺大輝, 下野貴弘, 守友浩
  • Organizer: 日本物理学会 第69回年次大会
  • Place of Presentation: 東海大学平塚キャンパス
• [Presentation] ナトリウムイオン電池正極材料のその場計測
  • Author(s): 仁谷浩明、小林航
  • Organizer: 「つくば連携研究」合同研究会
  • Place of Presentation: 筑波大学
• [Presentation] NaxCoO2におけるナトリウムイオン拡散
  • Author(s): 柴田恭幸，小林航，守友浩
  • Organizer: 第74回応用物理学会秋季学術講演会
  • Place of Presentation: 同志社大学
• [Presentation] NaxMO2(M=Co, Mn)のナトリウム濃度と電子状態
  • Author(s): 下野貴弘，棚辺大輝，小林航，守友浩
  • Organizer: 日本物理学会 2013年秋季大会
  • Place of Presentation: 徳島大学
• [Presentation] NaMO2(M=Cr,Fe)の構造解析
  • Author(s): 棚辺大輝，下野貴弘，小林航，守友浩
  • Organizer: 日本物理学会 2013年秋季大会
  • Place of Presentation: 徳島大学
• [Presentation] Intrinsic rapid Na+ intercalation observed in NaxCoO2 thin film
  • Author(s): W. Kobayashi, T. Shibata, and Y. Moritomo
  • Organizer: 17th international symposium on intercalation compounds
  • Place of Presentation: 仙台
• [Presentation] Layered Oxide NaxMO2 (M=Co, and Mn) as Cathode Material of Na+ Secondary Battery
  • Author(s): W. Kobayashi
  • Organizer: 2014 CENIDE-CNMM-TIMS Joint Symposium on Interdisciplinary Nano-Science and Technology
  • Place of Presentation: Qinghua university, Taiwan
  • Invited
• [Presentation] NaxCoO2薄膜の充放電特性
  • Author(s): 柴田恭幸
  • Organizer: 応用物理学会
  • Place of Presentation: 神奈川工科大学
• [Presentation] NaxMnO2の化学ポテンシャルと構造のx依存性
  • Author(s): 下野貴弘
  • Organizer: 日本物理学会
  • Place of Presentation: 広島大学
• [Presentation] Na0.7MO2の化学ポテンシャルと構造物性
  • Author(s): 棚辺大輝
  • Organizer: 日本物理学会
  • Place of Presentation: 広島大学
• [Presentation] Structural response of P2-type NaxMnO2 against Na+ intercalation
  • Author(s): W. Kobayashi
  • Organizer: Gordon Research Conferences: Nanomaterials for Applications in Energy Technology
  • Place of Presentation: Ventura, California, USA
• [Presentation] Intrinsic rapid Na+ intercalation observed in NaxCoO2 thin film
  • Author(s): T. Shibata
  • Organizer: Gordon Research Conferences: Nanomaterials for Applications in Energy Technology
  • Place of Presentation: Ventura, California, USA
• [Presentation] 層状岩塩型酸化物のアルカリ金属インターカレーション
  • Author(s): 下野貴弘
  • Organizer: 日本物理学会 2012年秋季大会
  • Place of Presentation: 横浜国立大学
• [Presentation] Electrochemical lithium intercalation into Bi2Sr2CaCu2O8+d
  • Author(s): T. Shimono
  • Organizer: XXIst International Symposium on the Jahn-Teller Effect
  • Place of Presentation: University of Tsukuba
• [Remarks] ナトリウムイオン電池材料の電位を予測生成メカニズムを解明 ～イオンモデルの新たな応用～
  • URL: http://www.tsukuba.ac.jp/attention-research/p201409301000.html
• [Remarks] 高速充放電可能なナトリウムイオン電池用材料の設計指針を発見
  • URL: http://www.tsukuba.ac.jp/attention-research/p201405280300.html