Pulsed Reverse Potential Electrodeposition of Carbon-Free Ni/NiO Nanocomposite Thin Film Electrode for Energy Storage Supercapacitor Electrodes

• Main Authors: Rania Afia Nuamah, Saleema Noormohammed, Dilip Kumar Sarkar
• Format: Article
• Language: English
• Published: MDPI AG 2021-06-01
• Series: Coatings
• Subjects: electrodeposition; pulse reverse potential (PRP); Ni/NiO nanocomposite; supercapacitor electrode; high capacitance retention; energy storage
• Online Access: https://www.mdpi.com/2079-6412/11/7/780
• ISSN: 2079-6412

A combined cyclic voltammetry and pulse reverse potential electrodeposition technique has been used to synthesize carbon-free Ni/NiO nanocomposite thin film supercapacitor electrode. The structural and morphological analyses have revealed the presence of crystalline phases of both Ni and NiO in the form of nanospheres of size ~50 nm. The electrochemical analysis of the Ni/NiOna nocomposite electrode has shown a remarkable performance by delivering a high specific capacitance of 2000 Fg⁻¹ at an applied current load of 1 Ag⁻¹ and a capacitance retention of 98.6%, after over 800 cycles under a high current load of 20 Ag⁻¹.