Peningkatan Konduktivitas Ionik Polimer Elektrolit Padat PEO/LiClO4 dengan Penambahan Epoksi

Rohma, Alisya (2023) Peningkatan Konduktivitas Ionik Polimer Elektrolit Padat PEO/LiClO4 dengan Penambahan Epoksi. Masters thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Polimer elektrolit padat (PEP) digunakan sebagai pengganti elektrolit cair untuk meningkatkan keamanan baterai ion lithium. Poliethylene oxide (PEO) memiliki kelarutan tinggi dalam garam lithium, stabilitas kimia dan termal yang baik sehingga cocok digunakan sebagai PEP. Namun, PEO sebagai polimer elektrolit padat memiliki konduktivitas ionik yang rendah yaitu 10-6-10-8 S/cm, sehingga perlu dimodifikasi untuk meningkatkan konduktivitas ioniknya. Penambahan konsentrasi garam LiClO4 sebagai sumber ion lithium dilakukan untuk mengurangi kristalinitas sehingga konduktivitas ionik polimer elektrolit padat meningkat. Epoksi ditambahkan untuk meningkatkan konduktivitas ionik dan kekuatan mekanik PEP. Polimer elektrolit padat diperoleh melalui metode solution casting. Uji karakteristik PEP dilakukan melalui FTIR, XRD, dan DSC. Konduktivitas ionik PEP diuji menggunakan EIS. Variasi konsentrasi garam pada PEP PEO/LiClO4 diperoleh konduktivitas ionik maksimum pada persen berat LiClO4 20% yaitu sebesar 9,23×10-5 S/cm. Penambahan epoksi sebanyak 5% kedalam PEP PEO/LiClO4 20% menunjukkan konduktivitas ionik tertinggi yaitu sebesar 2,90×10-4 S/cm. Penambahan epoksi membuktikan bahwa terjadi kenaikan konduktivitas ionik karena sifat perekat pada epoksi memberikan kontak yang efisien dengan elektroda.

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Solid polymer electrolyte (PEP) is used to replace liquid electrolytes to increase the safety of lithium-ion batteries. Polyethylene oxide (PEO) has a high solubility in lithium salts, good chemical and thermal stability, making it suitable for use as a solid polymer electrolyte. However, PEO as a solid polymer electrolyte has a low ionic conductivity of 10-6-10-8 S/cm, so it needs to be modified. The addition of the salt concentration of LiClO4 as a source of lithium ions was carried out to reduce the crystallinity so that the ionic conductivity of the solid electrolyte polymer increased. Epoxy resin is added to increase the mechanical strength of the PEP. Solid electrolyte polymer is obtained by the solution casting method. PEP characterization was obtained through FTIR, XRD, and DSC tests. PEP ion conductivity was tested using EIS. The variation of salt concentration in PEP PEO/LiClO4 obtained maximum ionic conductivity at 20 wt% LiClO4, 9.23 × 10-5 S/cm. The addition of 5% epoxy into 20% PEO/LiClO4 PEP showed the highest ionic conductivity of 2.90×10-4 S/cm. The addition of epoxy proves an increase in ionic conductivity due to the adhesive properties of the epoxy providing efficient contact with the electrodes.

Item Type: Thesis (Masters)
Uncontrolled Keywords: Lithium-ion battery, solid polymer electrolyte, LiClO4, PEO, Epoxy
Subjects: Q Science > QD Chemistry > QD115 Electrochemical analysis
Divisions: Faculty of Science and Data Analytics (SCIENTICS) > Chemistry > 47101-(S2) Master Thesis
Depositing User: Alisya Rohma
Date Deposited: 14 Feb 2023 02:02
Last Modified: 14 Feb 2023 02:02
URI: http://repository.its.ac.id/id/eprint/97038

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