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

Abstract

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.

Keywords

• nickel,stainless steel mesh,electrochemical properties,supercapacitor

Süperkapasitör Uygulamaları için Paslanmaz Çelik Örgü Üzerine Nikel Kaplama Üretimi

Abstract

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.

Keywords

• nikel,paslanmaz çelik örgü,elektrokimyasal özellikler,süperkapasitör

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