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Poly(imide- co -siloxane) as a Thermo-Stable Binder for a Thin Layer Cathode of Thermal Batteries

Author

Listed:
  • Ilwhan Oh

    (Department of Applied Chemistry and Department of IT Convergence Engineering, Kumoh National Institute of Technology, Gumi 730-701, Korea)

  • Jaeyoung Cho

    (Department of Applied Chemistry and Department of IT Convergence Engineering, Kumoh National Institute of Technology, Gumi 730-701, Korea)

  • Kwansu Kim

    (Department of Applied Chemistry and Department of IT Convergence Engineering, Kumoh National Institute of Technology, Gumi 730-701, Korea)

  • Jaehwan Ko

    (Department of Chemical and Biological Engineering, Gachon University, Seongnam 13120, Korea)

  • Haewon Cheong

    (Convergence Technology Research Directorate, Agency for Defense Development, Daejeon 305-600, Korea)

  • Young Soo Yoon

    (Department of Chemical and Biological Engineering, Gachon University, Seongnam 13120, Korea)

  • Hyun Min Jung

    (Department of Applied Chemistry and Department of IT Convergence Engineering, Kumoh National Institute of Technology, Gumi 730-701, Korea)

Abstract

The polymer binder, poly(imide- co -siloxane) (PIS), was synthesized and applied to form a thin cathode layer of composites for a thermal battery that has an unusually high operating temperature of 450 °C. The PIS was prepared through cross-linking of the polyimide with polysiloxane. The morphology of FeS 2 /PIS composites showed that FeS 2 particles was coated with the PIS cross-linked gel. The FeS 2 /PIS composites enabled to fabricate mechanically stable thin cathode layer that was 10–20% of the thickness of a conventional pellet-type cathode. The FeS 2 /PIS composites were stable up to 400 °C and maintained their morphology at this temperature. PIS coating layers decomposed at 450 °C, and a new residue was generated, which was observed by transmission electron microscopy, and the compositional change was analyzed. The FeS 2 /PIS composites showed enhanced thermal stability over that of FeS 2 in thermogravimetric analysis. The thermal battery with the PIS polymer binder showed a 20% discharge capacity increase when compared to a conventional pellet-type cathode.

Suggested Citation

  • Ilwhan Oh & Jaeyoung Cho & Kwansu Kim & Jaehwan Ko & Haewon Cheong & Young Soo Yoon & Hyun Min Jung, 2018. "Poly(imide- co -siloxane) as a Thermo-Stable Binder for a Thin Layer Cathode of Thermal Batteries," Energies, MDPI, vol. 11(11), pages 1-13, November.
    • Handle: RePEc:gam:jeners:v:11:y:2018:i:11:p:3154-:d:182820
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