Bath temperature impact on morphological evolution of Ni(OH)2 thin films and their supercapacitive behaviour

Bulletin of materials science

U M Patil¹  C D Lokhande³  S C Jun¹  K V Gurav²  J H Kim² 

[1] Department of Mechanical Engineering, Yonsei University, Seoul 120-749, Korea$$Department of Mechanical Engineering, Yonsei University, Seoul 120-749, KoreaDepartment of Mechanical Engineering, Yonsei University, Seoul 120-749, Korea$$;Thin Film Photonic and Electronics Lab, Department of Material Science and Engineering, Chonnam National University, 300 Yongbong-Dong, Puk-Gu, Gwangju 500-757, S. Korea$$Thin Film Photonic and Electronics Lab, Department of Material Science and Engineering, Chonnam National University, 300 Yongbong-Dong, Puk-Gu, Gwangju 500-757, S. KoreaThin Film Photonic and Electronics Lab, Department of Material Science and Engineering, Chonnam National University, 300 Yongbong-Dong, Puk-Gu, Gwangju 500-757, S. Korea$$;Thin Film Physics Laboratory, Department of Physics, Shivaji University, Kolhapur 416 007, India$$Thin Film Physics Laboratory, Department of Physics, Shivaji University, Kolhapur 416 007, IndiaThin Film Physics Laboratory, Department of Physics, Shivaji University, Kolhapur 416 007, India$$

关键词: Ni(OH)2;    chemical bath deposition;    structural analysis;    surface morphology;    supercapacitive behaviour.;   

DOI  :  

学科分类：材料工程

来源: Indian Academy of Sciences

【 摘 要 】

Nanostructured Ni(OH)₂ thin films were deposited over stainless steel (SS) and glass substrate via simple chemical bath deposition (CBD) method. NiCl₂ :6H₂O were used as source of nickel and aqueous ammonia as a complexing agent. The coating process of Ni(OH)₂ material over substrate is based on the decomposition of ammonia complexed nickel ions at two different bath temperatures. The changes in structural, morphological and electro-chemical properties are examined as an impact of bath temperature. XRD studies reveal formation of mixed phase of ð›�? and ð›�? at lower bath temperature (313 K) while, pure ð›�? phase of Ni(OH)₂ thin films deposited was observed at higher bath temperature (353 K). The morphological evolution from honeycomb structure to vertically aligned flakes over the substrate is observed as the influence of bath temperature. The supercapacitive performance based on the morphology examined by using cyclic voltammetric measurements in 1 M KOH. The maximum specific capacitances of 610 and 460 F/g were observed for the vertical flake and honeycomb structured Ni(OH)₂ thin films, respectively.

【 授权许可】

Unknown