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

1
Department of Applied Chemistry and Department of IT Convergence Engineering, Kumoh National Institute of Technology, Gumi 730-701, Korea
2
Department of Chemical and Biological Engineering, Gachon University, Seongnam 13120, Korea
3
Convergence Technology Research Directorate, Agency for Defense Development, Daejeon 305-600, Korea
*
Authors to whom correspondence should be addressed.
Energies 2018, 11(11), 3154; https://doi.org/10.3390/en11113154
Received: 23 October 2018 / Accepted: 10 November 2018 / Published: 14 November 2018
(This article belongs to the Section Energy Storage and Application)
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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 FeS2/PIS composites showed that FeS2 particles was coated with the PIS cross-linked gel. The FeS2/PIS composites enabled to fabricate mechanically stable thin cathode layer that was 10–20% of the thickness of a conventional pellet-type cathode. The FeS2/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 FeS2/PIS composites showed enhanced thermal stability over that of FeS2 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. View Full-Text
Keywords: thermal battery; polyimide; cathode; slurry casting; binder thermal battery; polyimide; cathode; slurry casting; binder
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Oh, I.; Cho, J.; Kim, K.; Ko, J.; Cheong, H.; Yoon, Y.S.; Jung, H.M. Poly(imide-co-siloxane) as a Thermo-Stable Binder for a Thin Layer Cathode of Thermal Batteries. Energies 2018, 11, 3154.

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