Pengaruh Aktivator Koh Terhadap Karakteristik Dan Kinerja Elektroda Karbon Tempurung Kemiri Pada Aplikasi Capacitive Deionization (CDI)

Noventine, Aurellina Putri (2026) Pengaruh Aktivator Koh Terhadap Karakteristik Dan Kinerja Elektroda Karbon Tempurung Kemiri Pada Aplikasi Capacitive Deionization (CDI). Other thesis, Institut Teknologi Sepuluh Nopember.

Text 5001221154-Undergraduate_thesis.pdf - Accepted Version Restricted to Repository staff only Download (2MB) | Request a copy

Abstract

Tingginya kadar ion terlarut dalam air mendorong pengembangan teknologi pengolahan air yang efektif dan hemat energi, salah satunya Capacitive Deionization (CDI). Kinerja CDI sangat dipengaruhi oleh karakteristik elektroda, sehingga diperlukan material yang memiliki konduktivitas listrik baik dan stabil secara elektrokimia. Karbon aktif dari biomassa merupakan salah satu material yang berpotensi digunakan sebagai elektroda CDI, salah satunya tempurung kemiri yang memiliki kandungan karbon tinggi. Penelitian ini bertujuan untuk menganalisis pengaruh variasi konsentrasi aktivator KOH terhadap karakteristik dan kinerja elektrokimia elektroda karbon tempurung kemiri serta mengevaluasi kesesuaian variasi konsentrasi KOH berdasarkan parameter kinerja elektrokimia untuk aplikasi CDI. Karbon diperoleh melalui proses karbonisasi tempurung kemiri dan diaktivasi menggunakan larutan KOH dengan variasi konsentrasi 5%, 10%, dan 15%. Karakterisasi dilakukan menggunakan Fourier Transform Infrared Spectroscopy (FTIR), pengujian konduktivitas listrik, Cyclic Voltammetry (CV), dan Electrochemical Impedance Spectroscopy (EIS). Hasil FTIR pada sampel KOH 15% menunjukkan adanya gugus fungsi O–H, C=C, dan C–O pada permukaan karbon. Nilai konduktivitas listrik meningkat seiring bertambahnya konsentrasi KOH dengan nilai tertinggi sebesar 972,6 µS/cm pada sampel KOH 15%. Kapasitansi spesifik tertinggi diperoleh pada sampel tanpa aktivasi sebesar 0,1345 F/g, sedangkan koefisien difusi ion natrium tertinggi diperoleh pada sampel KOH 5% sebesar 1,3251 cm²/s. Hasil penelitian menunjukkan bahwa variasi konsentrasi KOH memberikan pengaruh yang berbeda terhadap setiap parameter elektrokimia. Sampel tanpa aktivasi paling sesuai untuk kebutuhan penyimpanan muatan, sampel KOH 5% untuk transport ion, dan sampel KOH 15% untuk penghantaran elektron pada aplikasi CDI.
=======================================================================================================================================
The high content of dissolved ions in water encourages the development of effective and energy-efficient water treatment technology, one of which is Capacitive Deionization (CDI). The performance of CDI is greatly influenced by the characteristics of the electrode, so a material that has good electrical conductivity and is electrochemically stable is needed. Hazelnut shells are biomass that has the potential to be used as CDI electrodes because of its high carbon content. This study aims to analyze the effect of variations in the concentration of KOH activators on the characteristics and electrochemical performance of the carbon electrode of pecan shells and to evaluate the suitability of variations in KOH concentration based on electrochemical performance parameters for CDI applications. Carbon is obtained through the carbonization process of pecan shells and activated using KOH solutions with concentration variations of 5%, 10%, and 15%. Characterization was carried out using Fourier Transform Infrared Spectroscopy (FTIR), electrical conductivity testing, Cyclic Voltammetry (CV), and Electrochemical Impedance Spectroscopy (EIS). The FTIR results in the 15% KOH sample showed the presence of O–H, C=C, and C–O functional groups on the carbon surface. The electrical conductivity value increased as the KOH concentration increased, with the highest value of 972.6 μS/cm in the 15% KOH sample. The highest specific capacitance was obtained in the inactivated sample of 0,1345 F/g, while the highest sodium ion diffusion coefficient was obtained in the 5% KOH sample of 1.3251 cm²/s. The results showed that the variation in KOH concentration exerted a different influence on each electrochemical parameter. Samples without activation are best suited for charge storage needs, 5% KOH samples for ion transport, and 15% KOH samples for electron delivery in CDI applications.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Aktivasi KOH, Capacitive Deionization (CDI), Elektroda karbon, Kinerja elektrokimia, Tempurung kemiri, Activation, Carbon electrodes, Electrochemical performance, Hazelnut shells.
Subjects:	Q Science > QC Physics > QC100.5 Measuring instruments (General) Q Science > QC Physics > QC173.4.C63 Composite materials
Divisions:	Faculty of Science and Data Analytics (SCIENTICS) > Physics > 45201-(S1) Undergraduate Thesis
Depositing User:	Aurellina Putri Noventine
Date Deposited:	20 Jul 2026 15:02
Last Modified:	20 Jul 2026 15:02
URI:	http://repository.its.ac.id/id/eprint/135831

Actions (login required)

View Item