NAIST Division of Materials Science

Advanced Functional Materials Laboratory (with Osaka Municipal Technical Research Institute)

Staff & Contact
Educational StaffVisiting Prof. Yasuyuki Agari, Yutaka Fujiwara
Visiting Associate Prof. Masanari Takahashi
ContactTEL: +81-6-6963-8011
URLhttp://mswebs.naist.jp/LABs/omtri/index.html

Polymers, ceramics and metals are materials used widely in industry. Their applications are widespread from structural uses to a variety of functional uses. We devote our efforts to develop these materials and their nanocomposites to be applied in advanced industry. We focus on the nanostructure control of the materials to realize next generation electronic, optical, and energy devices. Another important challenge is the development of environmental-conscious material processing technology. Our laboratory is located in the Osaka Research Institute of Industrial Science and Technology, Morinomiya Center near the downtown area of Osaka city.  Our laboratory conducts intimate collaborations with engineers from private companies; this leads to the rapid application of the developed materials into practical devices.

Super hybrid materials made up of honeycomb structures with nanoparticles show 10 W/(m K) of thermal conductivity with electric insulation, although those with co-continuous phases, made by SPS method have been developed to attain super highly thermal conductivity (> 120 W/(m K). Furthermore, those with both a high thermal emissivity (> 0.9) and light transparency (haze<2%) have been developed, resulting in application to heat releasing materials in LED devices, communicators, robots and rockets.).

A group of environmental and functional polymer materials, poly(lactic acid) materials, was developed to obtain properties of similar flexibility, high elongation and transparency to polyethylene, although they were perfectly biodegradable. Additionally, poly(lactic acid) can be synthesized to have high adhesion strength and unique rheological properties, because of high brunch chains and approximately 1 of Mw/Mn.

The core technology to fabricate wiring pattern is selective polymer metallization using plating. Along with plating technology, nanoparticle fabrication and the surface engineering of polymers are fully used to develop wiring with controlled nanostructures at the metal/polymer interface.

Our research is aimed at the development of an all solid state lithium ion battery with high safety standards and high rechargeable capacity without liquid leakage. Our approaches to fabricate this lithium ion battery are economically and ecologically viable techniques expected to be used in industry. Core techniques employed are the slurry coating, aerosol deposition and the spray pyrolysis methods.

  • Fig. 1 Honeycomb structure of phenol resin particles with thermal conductive BN nanoparticles, or bridged structure of graphite plates with CNF has promoted thermal conductivity to increase immediately (two times).
  • Fig. 2 Metallizing of Polymer Substrates
  • Fig. 3 A cross-section of an all solid state lithium ion battery. The layer by layer structure is composed of a cathode (LiNi1/3Co1/3Mn1/3O2with Li3PS4 and acetylene black), a solid state electrolyte (Li3PS4), and an anode (carbon with Li3PS4 and acetylene black).

1.  T.Nagayama, T. Yamamoto, T. Nakamura, Y. Fujiwara, “Properties of electrodeposited invar Fe–Ni alloy/SiC composite film”, Surface and Coatings Technology, 322C, 70-75 (2017).

2.  Y.Agari, K. Uotani, K. Mizuuch, H. Hirano, J. Kadota, A. Okada, “Preparation and Properties of Al alloy/PPS Hybrid Materials with Co-continuous Phases by Spark Plasma Sintering Method”, Asia Thermophysical Properties Conference 2016 (Yokohama).

3.  M.Takahashi, J. Tani, H. Kido, A. Hayashi, K. Tadanaga, and M. Tatsumisago, “Thin Film Electrode Materials Li4Ti5O12 and LiCoO2 Prepared by Spray Pyrolysis Method”, 2011 IOP Conf. Ser. Mater. Sci. Eng., 18, 122004.

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