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ITS » Undergraduate Theses » Teknik Kimia
Posted by anisw@its.ac.id at 18/05/2016 11:15:11  •  1209 Views


SINTESA PARTIKEL MNO2 DENGAN TEKNIK ELEKTROKIMIA DALAM SEL MEMBRAN

SYNTHESYSOF MNO2 BY ELECTROCHEMICAL TECHNIQUE IN A MEMBRANE CELL

Author :
VISCARINI, VANDA PIRANTY ( 2310100017 )
ROKHIMA, NUR




ABSTRAK

Mangan dioksida MnO2 adalah elektroda yang menarik untuk desain superkapasitor karena mudah didapat biaya murah toksisitas rendah dan mempunyai rentang tegangan yang lebar. Kapasitansi spesifik MnO2 secara teori 615 Fg. Namun saat ini hanya 30 atau bahkan lebih rendah dari nilai teoritis yang dapat diperoleh. Partikel MnO2 dengan ukuran nano disintesis untuk meningkatkan kapasitas penyimpanan dan konduktifitas material tersebut. Sintesa MnO2 dilakukan dengan metode elektrokimia pada suhu ruang selama 4 jam menggunakan elektroda karbon dan larutan elektrolit berupa potassium permanganate KMnO4 dan potassium hidroksida KOH di mana daerah anoda dan katoda dipisahkan oleh membran nafion. Untuk memisahkan partikel yang tebentuk dari impurities dilakukan pengendapan dengan menggunakan centrifuge kemudian partikel dicuci sampai bersih dari impurities menggunakan aquadest. Diberikan alkohol pada hasil endapan supaya tidak menggumpal. Endapan partikel yang terbentuk kemudian dikeringkan dalam oven. Percobaan ini dilakukan pada pH larutan 7 - 11 dan variabel tegangan 1 - 5 V. Pada percobaan dengan menggunakan membran nafion larutan KMnO4 langsung dituangkan pada daerah katoda. Sintesis MnO2 menghasilkan MnO2 untuk superkapasitor yang nilai kapasitansi spesifiknya lebih besar yaitu 92267 Fg 945-MnO2 500.000 kali besar dibandingkan dengan kapasitor biasa dengan kapasitansi 17 mFg.


ABSTRACT

Manganese dioxide MnO2 is an attractive electrode for supercapacitor designs due to its availability low cost low toxicity and wide voltage windows. Specific capacitance of MnO2 is 1380 Fg in theoretical value. At present only 30 or even lower of theoretical value can be obtained. Nanostructure particles MnO2 are synthesized to improve their storage capacity and conductivity materials. Synthesis of MnO2 is prepared by electrochemical method in the room temperature for 3 hours using carbon as electrodes and potassium permanganate KMnO4 and potassium hydroxide KOH aselectrolyte solutions. Both of these electrodes are separated by nafion membrane. Then MnO2 are separated from their solution using centrifuge while are rinsed using distilled water until it turns into clear solution. The cleaned particles are dried at 100oC in the oven for 24 hours. This experiments are conducted with variable pH solution 7 10 and voltage 1 5 V. In using nafion membrane KMnO4 solution is directly poured in the cathode area. The synthetic of MnO2 give MnO2 for supercapacitor that the value of specific capacitance is greater than before about 92267 Fg 945-MnO2 500.000x greater than the ordinary capacitor with the capacitance about 17 mFg.



KeywordsMnO2; Elektrokimia; Superkapasitor
 
Subject:  NONE
Contributor
  1. Ir. Minta Yuwana, MS
  2. Prof.Dr.Ir.Heru Setyawan,M.Eng
Date Create: 23/01/2015
Type: Text
Format: pdf
Language: Indonesian
Identifier: ITS-Undergraduate-23001160008808
Collection ID: 23001160008808
Call Number: RSK 660.284 24 Vis s


Source
Undergraduate Theses of Chemical Engineering, RSK 660.284 24 Vis s, 2015

Coverage
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Rights
Copyright @2015 by ITS Library. This publication is protected by copyright and per obtained from the ITS Library prior to any prohibited reproduction, storage in a re transmission in any form or by any means, electronic, mechanical, photocopying, reco For information regarding permission(s), write to ITS Library




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  1.  ITS-Undergraduate-41556-2310100017-2310100079-abstract-idpdf.pdf - 215 KB
  2.  ITS-Undergraduate-41556-2310100017-2310100079-abstract-enpdf.pdf - 213 KB
  3.  ITS-Undergraduate-41556-2310100017-2310100079-conclusionpdf.pdf - 227 KB




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