Nanoporous gold–copper oxide based all-solid-state micro-supercapacitors. Issue 102 (21st October 2016)

• Record Type: Journal Article
• Authors: Singh, Balwant Kr; Shaikh, Aasiya; Badrayyana, Subramanya; Mohapatra, Debananda; Dusane, Rajiv O.; Parida, Smrutiranjan
• Is Part Of: RSC advances. Volume 6:Issue 102(2016)
• Page Start: 100467
• Page End: 100475
• Publication Date: 2016-10-21
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1039/c6ra19744b
• Languages: English
• ISSNs: 2046-2069

Abstract

Abstract : Development of nanoporous gold (NPG)-based micro-supercapacitor by simple annealing–dealloying processes. Abstract : The rapid growth of miniaturized electronic devices has increased the demand for energy storage devices with small dimensions. Micro-supercapacitors have great potential to supplement or replace batteries and electrolytic capacitors for a wide range of applications. Micro-supercapacitor can be fabricated with micro-electronic devices for efficient energy storage unit. However, the lower energy densities of micro-supercapacitors are still a bigger challenge to its application in micro devices. In this paper, we report all-solid-state nanoporous gold (NPG)–copper oxide (CuO) based micro-supercapacitor prepared using a simple fabrication process. In this process, first NPG interdigital patterns were developed by using a simple annealing and dealloying procedure, and then CuO was electrodeposited on NPG interdigital microelectrodes. The nanoporous gold substrate provides good electronic/ionic conductivity with high intrinsic surface area for the electrodeposition of CuO, which forms a novel hybrid electrode. The NPG–CuO micro-supercapacitor exhibits maximum areal capacitance 26 mF cm −2, maximum specific energy 3.6 μW h cm −2 and maximum specific power 646 μW cm −2 . NPG–CuO micro-supercapacitors show excellent cyclic stability with 98% capacitance retention after 10 000 cycles.