2021 Fiscal Year Final Research Report
Hybrid-Electrolytic Fabrication of Nanoporous Ti/Sn,Mo based Composite Films toward High-perfomance LIB Anodes
Project/Area Number |
19H02441
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Research Category |
Grant-in-Aid for Scientific Research (B)
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Allocation Type | Single-year Grants |
Section | 一般 |
Review Section |
Basic Section 26030:Composite materials and interfaces-related
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Research Institution | Nagoya Institute of Technology |
Principal Investigator |
Kure-Chu Song-Zhu 名古屋工業大学, 工学(系)研究科(研究院), 教授 (30633573)
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Co-Investigator(Kenkyū-buntansha) |
八代 仁 岩手大学, 理工学部, 教授 (60174497)
日原 岳彦 名古屋工業大学, 工学(系)研究科(研究院), 教授 (60324480)
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Project Period (FY) |
2019-04-01 – 2022-03-31
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Keywords | リチウムイオン電池負極材料 / ハイブリッド電析 / アノード酸化 / TiO2-TiN / Sn-SnO2 / MoO2-MoO3-MoN / MoS2 / アノード電析 |
Outline of Final Research Achievements |
This study proposes a novel process to fabricate various composite films with large capacity and high safety. Firstly, from the viewpoint of improving safety, a highly reactive and conductive nanoporous TiO2-TiO-TiN composite film as LIB anodes is formed on Ti by smart anodic oxidation that simultaneously realizes Ti oxidation and nitriding. Subsequently, we developed a hybrid plating technology that simultaneously deposit Sn-SnO2 and MoO2-MoO3-Mo2N composite nanoparticles into nanoporous TiO2-TiO-TiN composite film to achieve large-capacity and improve conductivity, thus leading to a high-performance TiO2-TiN/M-MOx LIB anode material.It is confirmed that the deposition of Sn-based and Mo-based materials into the TiO2-TiN films both improves the conductivity of the composite film and increases the areal specific discharge capacity for 5 to 16 times compared to the titania films without electrodeposition,indicating the feasiblity to improve both the safety and increase the capacity.
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Free Research Field |
材料の機能性表面処理(めっき、アノード酸化)、二次電池電極材料、自動車・電気部品の表面処理
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Academic Significance and Societal Importance of the Research Achievements |
本研究では、アノード酸化法でLiイオンとの作動電位が高いナノポーラスTiO2-TiO-TiN複合酸化皮膜をTi板上に形成し、TiO2膜の導電性と化学反応性を改善し、LIB電極材料としての反応効率を大幅に向上させた。また、ハイブリッド電析法を開発し、大容量且つ導電性Sn, Mo, Li系の複合ナノ粒子をその皮膜のナノ細孔中に析出させ、高性能のTiO2-TiN/M-MOx複合電極材料を創製し、世界初めでLIBの安全性とエネルギー密度の両者を同時に向上せた。特にめっきと同時にLiも複合膜に挿入して電極を活性化させることで、高性能化と製造コストの削減もできるほか、新たな学問領域の問題提起にもなる。
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