Analisis Pengaruh Variasi Konsentrasi NH4Br pada Proses Sintesis Katoda MnO2/Carbon Cloth terhadap Performa Elektrokimia Aqueous Rechargeable Zinc Ion Battery

Chotimah, Husnul (2022) Analisis Pengaruh Variasi Konsentrasi NH4Br pada Proses Sintesis Katoda MnO2/Carbon Cloth terhadap Performa Elektrokimia Aqueous Rechargeable Zinc Ion Battery. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Seiring dengan tren pemanfaatan energi terbarukan, aqueous rechargeable zinc ion battery (ARZIB) adalah kandidat yang menjanjikan untuk menggantikan baterai lithium. Karena beberapa keunggulan dari ARZIB yaitu harga yang murah, keberadaannya berlimpah, dan tidak beracun dengan MnO2 sebagai katodanya. MnO2 memiliki struktur polimorfik yang mempengaruhi kinerja baterai, dimana struktur polimorfik dapat dipengaruhi oleh konsentrasi prekursor. Pada penelitian ini KMnO4 dan NH4Br digunakan sebagai prekursor dalam proses sintesis katoda MnO2/carbon cloth untuk mengetahui pengaruh variasi konsentrasi NH4Br terhadap struktur polimorfik dan morfologi α-MnO2 nanowire, serta pengaruh variasi konsentrasi NH4Br terhadap performa elektrokimia dari ARZIB. Konsentrasi KMnO4 adalah 0,6 mmol dengan konsentrasi NH4Br yang digunakan adalah 0,6 mmol, 1,2 mmol, dan 1,8 mmol. Proses sintesis menggunakan metode oven hidrotermal dengan temperatur 180⁰C selama 15 jam. Berdasarkan hasil uji karakterisasi didapatkan bahwa pengaruh konsentrasi NH4Br pada ketiga variasi konsentrasi telah membentuk struktur polimorfik α-MnO2 dan morfologi nanowire dengan berbagai range diameter kurang dari 100 nm. Berdasarkan hasil uji performa elektrokimia didapatkan hasil bahwa baterai zinc sekunder dengan katoda yang terbentuk dari α-MnO2/carbon cloth dengan variasi konsentrasi 0,6 mmol NH4Br memiliki performa paling baik diantara variasi lainnya yaitu memiliki nilai Rct kecil senilai 38,11Ω, coulombic efficiency sebesar 98,79% pada siklus ke-100, dan memiliki kapasitas spesifik sebesar 565,08 mAh/g pada siklus kedua dan 320,16 mAh/g pada siklus ke-100.
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Along with the trend of using renewable energy, aqueous rechargeable zinc ion battery (ARZIB) is a promising candidate to replace lithium battery. Because some of the advantages of ARZIB are its low price, abundant content, and non-toxicity with MnO2 as the cathode. MnO2 has a polymorphic structure that affects battery performance, while the polymorphic structure can be affected by the concentration of precursors. In this study, KMnO4 and NH4Br were used as precursors in the cathode synthesis process of MnO2/carbon cloth to determine the effect of variations in NH4Br concentration on the polymorphic structure and morphology of α-MnO2 nanowires, as well as the effect of variations in NH4Br concentration on the electrochemical performance of ARZIB. The concentration of KMnO4 is 0.6 mmol with the concentrations of NH4Br used were 0.6 mmol, 1.2 mmol, and 1.8 mmol. The synthesis process used the hydrothermal oven method at 180⁰C for 15 hours. Based on the results of the characterization test, it is known that the effect of NH4Br concentration on the three concentration variations has formed a polymorphic structure of α-MnO2 and a nanowires morphology with a diameter range of less than 100 nm. Based on the results of the electrochemical performance test, it was found that a secondary zinc battery with a cathode formed α-MnO2/carbon cloth with a concentration variation of 0.6 mmol NH4Br has the best performance among other variations, which has a small Rct value of 38.11Ω, coulombic efficiency of 98 .79% in the 100th cycle, and has a specific capacity of 565.08 mAh/g in the second cycle and 320.16 mAh/g in the 100 th cycle.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	aqueous zinc ion battery, carbon cloth, hydrothermal, NH4Br, polimorph manganese dioxide, aqueous zinc ion battery, carbon cloth, hydrothermal, NH4Br, polimorf mangan dioksida,
Subjects:	Q Science > QD Chemistry > QD115 Electrochemical analysis
Divisions:	Faculty of Industrial Technology and Systems Engineering (INDSYS) > Material & Metallurgical Engineering > 28201-(S1) Undergraduate Thesis
Depositing User:	Husnul Chotimah
Date Deposited:	04 Feb 2022 08:02
Last Modified:	31 Oct 2022 02:37
URI:	http://repository.its.ac.id/id/eprint/92819

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