Azmy, Ilham (2014) Pengaruh kosentrasi polivinil alkohol (PVA) terhadap performa elektrokima LiTi2 (PO4)3 hasil proses sol-gel sebagai anoda untuk baterai ion lithium tipe aqueous elektrolit. Undergraduate thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Penelitian tentang baterai ion lithium sebagai sistem penyimpanan energi berkembang begitu pesat. Pada baterai ion lithium, salah satu bagian utama adalah anoda yang terdiri atas material LiTi2(PO4)3. Maka, penelitian ini bertujuan untuk mengetahui pengaruh konsentarsi polivinil alkohol (PVA) terhadap performa elektrokimia LiTi2(PO4)3 sebagai anoda baterai ion lithium. Proses sintesis material LiTi2(PO4)3 dilakukan dengan proses sol-gel menggunakan Li2CO3, TiO2, NH4H2PO4, dan variasi penambahan konsentrasi 5 wt%, 10 wt%, 15 wt% polivinil alkohol (PVA). Pada pengujian XRD dari ketiga sampel, teridentifikasi LiTi2(PO4)3 sesuai dengan JCPDS 35-074 meskipun masih ada fasa lain dalam intensitas yang kecil. Pengujian SEM menunjukkan bahwa material LiTi2(PO4)3 5wt.% PVA memiliki ukuran partikel yang lebih kecil dibandingkan dengan lainnya. Namun demikian, ukuran partikel tidak merata dan masih ada sedikit aglomerasi karena proses kalsinasi pada temperatur tinggi. Pengujian performa elektrokimia Cyclic Voltammetry (CV) menunjukkan bahwa anoda LiTi2(PO4)3 5wt.% PVA menunjukkan nilai kinetik ion yang tinggi, karena pada anoda tersebut memiliki ukuran partikel yang paling kecil dibandingkan yang lainnya sehingga meningkatkan difusivitas ion Li+. Adapun pengujian Galvanostat Charge-Discharge menunjukkan bahwa anoda LiTi2(PO4)3 5wt.% PVA memiliki stabilitas yang lebih baik karena pada anoda LiTi2(PO4)3 5wt.% PVA memiliki sebaran ukuran partikel yang lebih kecil sehingga transfer ion saat proses interkalasi/de-interkalasi dapat berlangsung secara stabil.
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The development of research on lithium ion battery as energy storage system is very rapidly. In lithium ion battery, one of the main part composed as anode by the material LiTi2(PO4)3. So, this research aimed to determine the effect of the concentration of polyvinyl alcohol (PVA) on the electrochemical performance LiTi2(PO4)3 as an anode of lithium ion battery. The synthesis process of LiTi2(PO4)3 conducted by sol-gel process that using Li2CO3, TiO2, NH4H2PO4, and variations in concentrations of 5 wt%, 10 wt%, 15 wt% polyvinyl alcohol (PVA). In the XRD testing of three samples, identified LiTi2(PO4)3 according to JCPDF 35-074 although there is still other phase in a small intensity. The SEM test showed the material LiTi2(PO4)3 5wt.% PVA have particles size smaller than the other variations. However, the particle size is not homogeny and there is still little agglomeration due to the calcination process at high temperature. The electrochemical performance test of Cyclic Voltammetry (CV) showed that anode LiTi2(PO4)3 5wt.% PVA showed high ion kinetic values, because at the anode has the smallest particle size compared to the other, increasing the Li+ ion diffusivity. The Charge-Discharge Galvanostat testing showed that the anode LiTi2(PO4)3 5wt.% PVA has better stability because the anode LiTi2(PO4)3 5wt.% PVA has a particle size distribution smaller, so that the transfer of ions during the process of intercalation/de-intercalation can take place in a stable.
| Item Type: | Thesis (Undergraduate) |
|---|---|
| Additional Information: | RSMt 621.312 423 Azm p |
| Uncontrolled Keywords: | LiTi2 (PO4)3 polivinil alkohol (PVA); sol-gel; performa elektrokimia |
| Subjects: | Q Science > QD Chemistry > QD553 Electrochemistry. Electrolysis |
| Divisions: | Faculty of Industrial Technology > Material & Metallurgical Engineering > 28201-(S1) Undergraduate Thesis |
| Depositing User: | - Taufiq Rahmanu |
| Date Deposited: | 10 Jul 2019 04:33 |
| Last Modified: | 10 Jul 2019 04:33 |
| URI: | http://repository.its.ac.id/id/eprint/63796 |
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