Solution processed nanostructured cerium oxide electrode: Electrochemical engineering towards solid-state symmetric supercapacitor device Articles uri icon

authors

  • PANDIT, BIDHAN
  • KUMAR, NITISH
  • KOINKAR, PANKAJ M.
  • SANKAPAL, BABASAHEB R.

publication date

  • April 2019

start page

  • 96

end page

  • 107

volume

  • 839

International Standard Serial Number (ISSN)

  • 1572-6657

Electronic International Standard Serial Number (EISSN)

  • 1873-2569

abstract

  • Present work portrays the surface morphology dependent electrochemical behaviors tuned by annealing the chemical bath deposited (CBD) cerium oxide electrodes. The altered nanostructure properties are well-supported by in-depth structural and morphological analysis. Cerium oxide electrode annealed at 200 degrees C exhibits good surface properties enabling maximum electro-active porous cavities to penetrate electrolyte ions towards enhanced electron transfer. Consequently, the electrode exhibits maximum specific capacitance of 750 F/g with remarkably stable charge-discharge cycles. Fabricated symmetric solid-state supercapacitor device impressively expands potential window to 1.2 V with the aid of PVA-LiClO4 gel electrolyte with a peak specific capacitance of 321.3 F/g with top-up of 61.4 Wh/kg specific energy. The series combination of two devices confirms the strong energy storage ability by glowing 'VNIT' acronym designed through 21 red LEDs from the practical point of view.

subjects

  • Chemistry

keywords

  • cerium oxide; energy storage; supercapacitor; symmetric device