Path: TopS1-Final ProjectChemistry-FMIPA2012

MEMBRAN POLIMER ELEKTROLIT DARI POLIBLEND PVA – PEG –LICLO LICLO4 UNTUK APLIKASI BATERAI ION LITIUM

MEMBRANES FROM POLYBLENDS OF PVA – PEG – LICLO4 FOR LITHIUM ION BATTERY APPLICATION

Undergraduate Theses from JBPTITBPP / 2017-09-27 11:42:31
Oleh : DANANG TRAYASRINDRA (NIM : 10508064); Pembimbing : Prof. Dr. I Made Arcana, S1 - Department of Chemistry
Dibuat : 2012, dengan 7 file

Keyword : Baterai ion litium, membran polielektrolit, LiClO4, konduktivitas

Keperluan akan baterai penyimpan energi listrik yang efisien dan aman dewasa ini semakin meningkat karena penggunaannya sebagai sumber energi listrik peralatan




elektronik dalam kehidupan sehari – hari. Salah satu baterai penyimpan energi listrik tersebut adalah baterai ion litium yang pada saat ini masih menggunakan cairan




elektrolit yang memiliki kelemahan karena dapat menimbulkan kebocoran, bahkan ledakan akibat panas pada waktu pemakaiannya. Salah satu usaha untuk memperbaiki kelemahan tersebut adalah dengan mengganti cairan elektrolit dengan




elektrolit padat ini dari polimer elektrolit. Pada penelitian ini, polimer elektrolit padat dibuat melalui pembentukan poliblend dari PVA (polivinil alkohol), PEG (polietilen glikol), dan garam LiClO4 digunakan sebagai garam ioniknya. Sifat membran poliblend yang dihasilkan dikarakterisasi melalui analisis gugus fungsi dengan FTIR




(Fourier transform infra red), konduktivitas dengan EIS (electrochemical impedance spectroscopy), ketahanan termal dengan TGA/DTA (thermal gravimetric analysis/differential thermal analysis), kristalinitas dengan XRD (X-ray diffraction), dan analisis kekuatan mekanik dengan Tensile tester. Membran poliblend dengan hantaran maksimum diperoleh pada membran dengan perbandingan PVA : PEG




(80% : 20%) dengan nilai konduktivitas 3,222x10-6 S/cm. Penambahan LiClO4 sebanyak 15% terhadap 1 gram, poliblend tersebut mampu meningkatkan konduktivitas menjadi 1,911x10-4 S/cm. Pada pengujian pemakaian baterai didapatkan nilai voltase awal sebesar 3,95 V, rata – rata laju penurunan 0,02 V/menit dan waktu pemakaian baterai 65 menit. Nilai voltase awal tersebut lebih tinggi dibandingkan voltase awal membran baterai komersial yaitu sebesar 3,84 V.




Pada proses pengisiannya, nilai voltase awal pengisian didapat sebesar 3,74 V dengan rata – rata laju peningkatan 0,00373 V/menit dengan waktu pengisian selama 55 menit, yang lebih tinggi dibandingkan dari membran baterai komersial. Membran PVA : PEG (80% : 20%) dengan penambahan garam LiClO4 15% memiliki potensi untuk diaplikasikan sebagai alternatif membran polielektrolit pada baterai ion litium.

Deskripsi Alternatif :

The need for the efficient and safe storage battery as an electrical energy resource today is increasing due to most of the electronic equipments such as hand phone and notebook use the battery as the electrical energy resource. One of the electrical energy storage battery is a lithium-ion battery, currently configured with a liquid electrolyte between the anode (lithium metal) and cathode (lithium metal oxide). The use of a liquid electrolyte leads to problems such as leakage of a flammable electrolyte, production of gases upon overcharge, as well as a thermal runway reaction when it is heated to high temperatures. One attempt to resolve this problem is to replace the liquid electrolyte with a solid electrolyte by using the polymer




electrolyte. Therefore, in this study was focused on the preparation of environmentally friendly polyelectrolyte membrane with low cost for lithium-ion battery applications. The preparation of polyelectrolyte membrane was done by casting of polymer solution with using polyblends of PVA (polyvinyl alcohol), PEG (polyethylene glycol), and LiClO4 used as an ionic salt. Polyelectrolyte membrane properties were characterized by analysis of functional groups with FTIR (Fourier transformer infrared), conductivity with EIS (electrochemical impedance spectroscopy), thermal resistance with TGA / DTA (thermal gravimetric analysis / differential thermal analysis), crystallinity with XRD (X-ray diffraction), and analysis of mechanical properties with tensile tester. The maximum conductivity with value of 3.22 x10-6 S/cm) was observed in polyelectrolyte membrane with ratio PVA : PEG (80%: 20%) and the addition of LiClO4 as the ionic electrolyte (15 % of total weight 1 gram) can increase the conductivity of membrane to 1.91 x10-4 S/cm. In the testing of membrane performance with using a commercial battery cell, polyelectrolyte membrane of PVA/PEG/Li was observed to have the initial voltage value of 3.95 Volt, it is higher than the value of the commercial membrane with the initial voltage of 3.84 Volt. In the discharging, the average decline rate of the voltage value for polyelectrolyte membrane of PVA/PEG/Li was 0.02 Volt/min with discharge time 65 minutes. However, in the charging the maximum voltage value and the average rate of charging were 3.74 Volt and 0.00373 Volt/min, respectively, with the charging time for 55 minutes, which were higher than the value of the commercial membrane. The polyelectrolyte membrane prepared by blending of PVA : PEG (80%: 20%) with the addition of LiClO4 15% could be applied as alternative




polyelectrolyte membranes for lithium-ion battery applications.

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  • Pembimbing : Prof. Dr. I Made Arcana, Editor: Alice Diniarti

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