Developments of Functional Vanadium Ceramics System

• Project/Area Number: 18K04690
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Review Section: Basic Section 26020:Inorganic materials and properties-related
• Research Institution: University of Tsukuba
• Principal Investigator: ONODA Masashige 筑波大学, 数理物質系, 准教授 (30177282)
• Project Period (FY): 2018-04-01 – 2024-03-31
• Project Status: Completed (Fiscal Year 2023)
• Budget Amount: ¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000); Fiscal Year 2020: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000); Fiscal Year 2019: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000); Fiscal Year 2018: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
• Keywords: 機能性セラミックス / 熱電変換 / 2次電池 / 相関電子系 / 重い電子系 / 量子スピン系 / 熱電変換材料 / 2次電池用正極活物質 / バナジウムセラミックス / 相関電子 / 量子スピン

Outline of Final Research Achievements

I obtained achievements in the following fields regarding vanadium ceramics.
[Thermoelectric system] Origin of thermoelectric power of MxV2O5 and guidelines for improving thermoelectric performance. [Battery system] Charge/discharge characteristics of element substitution systems for composite crystal/superlattice type CuxV4O11. [Correlation system] (a) Physical properties of the LixV3(P2O7)3(PO4)2 system and the theory of xy-plane magnetism of the XXZ model with single-ion anisotropy. (b) Mixed-valence ion model in the incoherent metallic phase of LiV2O4 exhibiting heavy electron behavior, and theory of high-temperature magnetic susceptibility of metal-electron systems. Evidence that this material is located near the Mott insulator and effectiveness of the Planckian model in the coherent phase above 5 K. [Quantum spin system] Interchain interactions related to one-dimensional magnetism of γ-phase LiV2O5.

Academic Significance and Societal Importance of the Research Achievements

本研究は，バナジウムセラミックスの(1)熱電系，(2)電池系，(3)相関系，(4)量子スピン系に関する．(1)と(2)の機能性は，枯渇，温室ガス排出，放射性廃棄物の問題とは無縁の1次エネルギー源である水力，風力，太陽光等の再生可能エネルギーによって成り立つ社会を構築する上で必要不可欠なデバイスの開発に直結する．それらの性質は物質の結晶構造と電子状態に依存し，その根源を理解するためには，磁気電気的性質を統一的立場から解明することが重要である．高性能な熱電系および電池系は相関系あるいは量子スピン系の特徴を持つことが期待され，それらの分野の学術的発展にも大きく貢献する．

Research Products

• [Journal Article] <i>T</i>-Linear Resistivity and Thermoelectric Power in Heavy-Fermion Spinel LiV₂O₄ (2023)
  • Author(s): Onoda Masashige、Takada Satoshi
  • Journal Title: Journal of the Physical Society of Japan Volume: 92 Issue: 12 Pages: 1-5
  • DOI: 10.7566/jpsj.92.124706
  • Peer Reviewed
• [Journal Article] High-temperature magnetic susceptibility in metal-electron systems (2022)
  • Author(s): Onoda Masashige、Takada Satoshi
  • Journal Title: Physica B: Condensed Matter Volume: 643 Pages: 414177-414177
  • DOI: 10.1016/j.physb.2022.414177
  • Peer Reviewed
• [Journal Article] Enhanced V?V Bond Length Dependence of Magnetic Exchange Coupling in Frustrated Spinels Li₂V₂O₄ and M²⁺V₂O₄ near the Mott Transition (2022)
  • Author(s): Onoda Masashige、Iba Satoru
  • Journal Title: Journal of the Physical Society of Japan Volume: 91 Issue: 2
  • DOI: 10.7566/jpsj.91.023702
  • NAID: 210000159553
  • Peer Reviewed
• [Journal Article] Mixed-Valence Ion Model for Incoherent Metallic State in Heavy-Fermion Spinel LiV2O4 (2021)
  • Author(s): Onoda Masashige
  • Journal Title: Journal of the Physical Society of Japan Volume: 90 Issue: 3 Pages: 034701-034701
  • DOI: 10.7566/jpsj.90.034701
  • NAID: 210000158833
  • Peer Reviewed
• [Journal Article] Effective-Field Approach to Long-Range Order of Spin-1 and Spin-1/2 Mixed System in XXZ Model with Single-Ion Uniaxial Anisotropy (2020)
  • Author(s): Onoda Masashige、Takada Satoshi
  • Journal Title: Journal of the Physical Society of Japan Volume: 89 Issue: 7 Pages: 074002-074002
  • DOI: 10.7566/jpsj.89.074002
  • NAID: 40022283338
  • Peer Reviewed
• [Journal Article] Effective-Field Approach to Magnetic Properties of Spin-1 System in XXZ Model with Single-Ion Uniaxial Anisotropy (2020)
  • Author(s): Onoda Masashige，Takada Satoshi
  • Journal Title: Journal of the Physical Society of Japan Volume: 89 Issue: 3 Pages: 034002-034002
  • DOI: 10.7566/jpsj.89.034002
  • NAID: 210000158017
  • Peer Reviewed
• [Journal Article] Essential Difference between Magnetic Properties of Integer and Half-Integer Spin Systems in XXZ Model with Single-Ion Uniaxial Anisotropy (2019)
  • Author(s): Onoda Masashige，Takada Satoshi
  • Journal Title: Journal of the Physical Society of Japan Volume: 88 Issue: 6 Pages: 064003-064003
  • DOI: 10.7566/jpsj.88.064003
  • NAID: 40021915200
  • Peer Reviewed
• [Journal Article] Suppression of Ferromagnetic Order by Uniaxial Anisotropy and Its Influence on Nuclear Magnetic Relaxation for Li9V3(P2O7)3(PO4)2 (2019)
  • Author(s): Onoda Masashige、Takada Satoshi
  • Journal Title: Journal of the Physical Society of Japan Volume: 88 Issue: 3 Pages: 034709-034709
  • DOI: 10.7566/jpsj.88.034709
  • NAID: 210000135136
  • Peer Reviewed
• [Journal Article] 高容量2次電池正極活物質Li9V3(P2O7)3(PO4)2のスピンダイナミクス (2018)
  • Author(s): 小野田雅重
  • Journal Title: 第21回超イオン導電体物性研究会講演要旨集 Volume: 1 Pages: 23-26
• [Presentation] 新型機能性バナジウムポリアニオン系の1イオン異方性と磁気秩序II (2020)
  • Author(s): 小野田 雅重，平尾 亮磨
  • Organizer: 日本物理学会 第75回年次大会 17pB31-10
• [Presentation] 新型機能性バナジウムポリアニオン系の1イオン異方性と磁気秩序 (2019)
  • Author(s): 小野田 雅重，相川 俊，川原井 優太，平尾 亮磨
  • Organizer: 日本物理学会 2019年秋季大会 10pB11-13
• [Presentation] Li9V3(P2O7)3(PO4)2の磁気秩序不在下における帯磁率の増減と核磁気緩和への影響 (2019)
  • Author(s): 小野田雅重, 高田慧
  • Organizer: 日本物理学会第74回年次大会
• [Presentation] 高容量2次電池正極活物質Li9V3(P2O7)3(PO4)2のスピンダイナミクス (2018)
  • Author(s): 小野田雅重
  • Organizer: 第21回超イオン導電体物性研究会
• [Presentation] Li9V3(P2O7)3(PO4)2のスピンゆらぎと強磁性秩序 (2018)
  • Author(s): 小野田雅重, 高田慧
  • Organizer: 日本物理学会2018年秋季大会
• [Presentation] 固体電解質Li(BH4)1-xIxの結晶構造とイオンダイナミクス (2018)
  • Author(s): 小野田雅重
  • Organizer: 第5回電池材料解析ワークショップ
• [Book] 電気化学・インピーダンス測定のデータ解析手法と事例集 (2018)
  • Author(s): 小野田雅重
  • Total Pages: 522
  • Publisher: 技術情報協会
  • ISBN: 9784861047305
• [Remarks]
  • URL: https://www.px.tsukuba.ac.jp/~onoda/
• [Remarks]
  • URL: http://www.px.tsukuba.ac.jp/~onoda/