Fabrication of Nickel Coating on a Stainless Steel Mesh for Supercapacitor Applications

Yıl 2019, Cilt: 5 Sayı: 2, 201 - 213, 19.12.2019

Naime Özdemir , Abdulcabbar Yavuz , Perihan Yilmaz Erdogan , Huseyin Zengin

https://doi.org/10.28979/comufbed.592527

Cited By: 4

Öz

A stainless steel mesh current collector was coated by one-step
electrochemical method for supercapacitor applications. As stainless steel mesh
has a high surface area, accessibility of ions may be achieved easier than bulk
stainless steel. Thin nickel films were synthesized in an aqueous solution
electrolyte medium by a three-electrodes electrochemical configuration system
under room temperature conditions by applying the potential of -1.5 V for 150,
300 and 600 seconds. The electrochemical capacitive characterization of the
prepared nickel films was investigated in 1 M KOH electrolyte solution. The surface
morphology of the prepared electrodes was examined. Microstructures of nickel
coatings obtained on stainless steel wire surface were similar to tree peels.
Therefore, electrodes with high surface area were obtained in the
electrodeposition of nickel from pyrophosphate medium. The ion and electron
transfer rates between the nickel-coated stainless steel mesh and the alkaline
electrolyte were increased. Nickel coated steel mesh having a redox reaction at
positive potential between +0.2 V and +0.6 V could be used as cathode
electrodes. The nickel/stainless steel mesh electrode has a specific capacity
of 1090 F g^-1 at the scan rate of 5 mV s^-1. As the
electroactivity of stainless steel in KOH electrolyte was increased with nickel
film, nickel-based coatings on stainless steel mesh surface in aqueous solution
can be used as cathode electrodes in supercapacitor applications.

Anahtar Kelimeler

nickel, stainless steel mesh, electrochemical properties, supercapacitor

Süperkapasitör Uygulamaları için Paslanmaz Çelik Örgü Üzerine Nikel Kaplama Üretimi

Öz

Süperkapasitör uygulamaları için tek adımda
paslanmaz çelik örgü akım toplayıcısı elektrokimyasal yöntemle kaplandı.
Paslanmaz çelik ağı yüksek yüzey alanına sahip olduğundan, iyonların
erişilebilirliği dökme paslanmaz çelikten daha kolaydır. İnce nikel filmler,
sulu çözelti elektrolit ortamında, oda sıcaklığı koşulları altında, 150, 300 ve
600 saniye boyunca -1.5 V potansiyelinin uygulanmasıyla üç elektrotlu bir
elektrokimyasal konfigürasyon sistemi ile sentezlendi. Hazırlanan nikel
filmlerin elektrokimyasal kapasitif özellikleri 1 M KOH elektrolit çözeltisinde
incelendi. Paslanmaz çelik örgü yüzeyinde elde edilen nikel kaplamaların mikro
yapıları ağaç kabuklarına benzemektedir. Bu yüzden, yüksek yüzey alanına sahip
elektrotlar, pirofosfat ortamından nikelin elektrodepolanması ile elde edildi.
Nikel kaplı paslanmaz çelik örgü ve bazik elektrolit arasındaki iyon ve
elektron transfer hızları arttırıldı. +0.2 V ve +0.6 V arasındaki pozitif
potansiyelde redoks reaksiyonuna sahip nikel kaplı çelik örgü, katot elektrot
olarak kullanılabilir. Nikel/paslanmaz çelik örgü elektrot, 5 mV s^-1
tarama hızında 1090 F g^-1 spesifik kapasitansa sahiptir. Paslanmaz
çeliğin KOH elektrolitinde elektroaktivitesi nikel filmle karıştırıldığında,
sulu çözelti içindeki paslanmaz çelik ağ yüzeyindeki nikel temelli kaplamalar,
süperkapasitör uygulamalarında katot elektrodu olarak kullanılabilir.

Anahtar Kelimeler

nikel, paslanmaz çelik örgü, elektrokimyasal özellikler, süperkapasitör

Kaynakça

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