Production of a Supercapacitor for Energy Storage Using Mo-doped Microalgae

Abstract

In order to meet the energy storage needs and overcome the disadvantages of conventional capacitors and batteries, intensive studies have been carried out on supercapacitors recently. In this study, Molybdenum was doped to Microcystis aeruginosa, a freshwater algae biomass, and activated carbon was produced by combining carbonization and activation methods. Produced activated carbons were converted into electrodes using sputtering method and a supercapacitor cell was prepared. Electrochemical tests of the electrodes were performed with a two-electrode system using 6 M KOH as the electrolyte. The specific capacitance value of the electrode was calculated as 9.84 F/g at a current density of 1 A/g. The electrodes subjected to the stability test showed only a 5.75% capacitance reduction. In the light of the results, electrodes prepared are thought to be promising in the field of energy storage due to their cheapness, low internal resistance, and stability.

Keywords

• Supercapacitor
• Energy Storage
• Activated Carbon

Mo-katkılı Mikroalg Kullanılarak Enerji Depolama Amaçlı Süperkapasitör Üretimi

Öz

Enerji depolama ihtiyaçını gidermek ve geleneksel kondansatörler ve bataryaların dezavantajlarını aşmak için son zamanlarda süperkapasitörler üzerine yoğun çalışmalar yapılmaktadır. Bu çalışma kapsamında, tatlı su yosunu biyokütlesi olan Microcystis aeruginosa’ya Molibden katkılama yapılmış, karbonizasyon ve aktivasyon yöntemleri birleştirilerek aktif karbon üretimi gerçekleştirilmiştir. Üretilen aktif karbonlar püskürtme yöntemi kullanılarak elektrotlara dönüştürülmüş ve bir süperkapasitör hücresi hazırlanmıştır. Elektrotların elektrokimyasal testleri, elektrolit olarak 6 M KOH kullanılarak iki elektrotlu bir sistemle yapılmıştır. Elektrotunun spesifik kapasitans değeri 1 A/g akım yoğunluğunda 9,84 F/g olarak hesaplanmıştır. Kararlılık testine tabi tutulan elektrotlarda sadece %5,75 lik bir kapasite azalması görülmüştür. Elde edilen veriler ışığında hazırlanan elektrotların ucuzluğu, düşük iç direnci ve kararlılığı nedeniyle enerji depolama alanında umut vaat ettiği düşünülmektedir.

Anahtar Kelimeler

• Süperkapasitör
• Enerji Depolama
• Aktif Karbon.

Kaynakça

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