Pengaruh Variasi Konsentrasi Karbon (Citric Acid) Terhadap Performa Elektrokimia Pada Material Katoda Na2MnPO4F/C

Safitri, Maya (2022) Pengaruh Variasi Konsentrasi Karbon (Citric Acid) Terhadap Performa Elektrokimia Pada Material Katoda Na2MnPO4F/C. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Penelitian ini bertujuan untuk mengetahui performa elektrokimia material katoda Na2MnPO4F/C akibat variasi konsentrasi pelapisan karbon. Material Na2MnPO4F/C sebagai material baterai natrium telah disintesis menggunakan metode solid state dengan variasi konsentrasi pelapisan karbon sebesar 0, 3, 5, dan 7 wt.%. Sumber karbon yang digunakan adalah citric acid (C6H8O7). Analisis X- Ray Diffraction (XRD) menunjukkan terbentuknya struktur monoklinik dengan space group P21/n dan tidak ada indikasi fase sekunder pada semua variasi konsentrasi pelapisan karbon. Ukuran kristal mengalami penurunan seiring dengan penambahan konsentrasi karbon. Analisis sifat konduktivitas listrik dan ionik pada semua variasi konsentrasi pelapisan karbon dilakukan menggunakan Electrochemical Impedance Spectroscopy (EIS). Nilai konduktivitas listrik (σe) material Na2MnPO4F/C tanpa pelapisan karbon (0 wt.%) hingga konsentrasi karbon 7 wt.% mengalami peningkatan sebesar 62%, yaitu dari nilai 1,50 × 10-8 S cm-1 menjadi 2,43 × 10-8 S cm-1. Performa puncak tegangan oksidasi-reduksi dari pengujian Cyclic Voltammetry (CV) dilakukan pada masing-masing sampel dengan scan rate 0,1 mV s-1. Performa pengisian dan pengosongan muatan (charging dan discharging) pada material katoda Na2MnPO4F/C dengan variasi konsentrasi karbon, menunjukkan semakin tinggi konsentrasi pelapisan karbon mengakibatkan nilai kapasitas muatan semakin tinggi, dimana pada konsentrasi karbon 7 wt% menunjukkan nilai kapasitas pengisian dan pengosongan terbesar yaitu 10,9 mAh/g.
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The research aims to identify electrochemical performance of Na2MnPO4F/C cathode materials due to variation of carbon coating concentration. Material Na2MnPO4F/C were synthesized via solid state methode with variation of carbon concentration 0, 3, 5, and 7 wt.%. The source of carbon comes from citric acid (C6H8O7). X-Ray Diffraction (XRD) results show that all of samples have formed to monoclinic structure with space group P21/n and no secondary phase was detected. The decrease of crystal size caused by increasing of carbon coating concentration. Analysis of electrical and ionic conductivity of all carbon coating concentration was determined using Electrochemical Impedance Spectroscopy (EIS). The value of electrical conductivity (σe) from Na2MnPO4F/C without carbon coating to a carbon concentration of 7 wt.% caused an increase of 62% ; 1,50 × 10-8 S cm-1 to 2,43 × 10-8 S cm-1. The potential peak performance of oxidation and reduction were analyzed using Cyclic Voltammetry (CV) at each sample with scan rate 0,1 mV s-1. The performance of charging and discharging capacity of cathode material Na2MnPO4F/C with carbon coating concentration shows that the enchancement of charge and discharge capacity caused by increasing of carbon coating concentration with 7 wt.% had the highest value. It delivered a charging and discharging capacity of 10,9 mAh/g.

Item Type:	Thesis (Other)
Additional Information:	RTFi 621.312 423 Saf p-1
Uncontrolled Keywords:	citric acid, katoda baterai, Na2MnPO4F/C, solid state
Subjects:	T Technology > TP Chemical technology > TP255 Electrochemistry, Industrial.
Divisions:	Faculty of Science and Data Analytics (SCIENTICS) > Physics > 45201-(S1) Undergraduate Thesis
Depositing User:	Mr. Tondo Indra Nyata
Date Deposited:	17 Jan 2023 03:33
Last Modified:	17 Jan 2023 03:33
URI:	http://repository.its.ac.id/id/eprint/95430

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