Spongy nano surface architecture of chemically grown BiVO4: High-capacitance retentive electrochemical supercapacitor Articles uri icon

authors

publication date

  • July 2021

start page

  • 25586

end page

  • 25595

issue

  • 50

volume

  • 46

International Standard Serial Number (ISSN)

  • 0360-3199

Electronic International Standard Serial Number (EISSN)

  • 1879-3487

abstract

  • Design of nanostructured surface architecture is currently playing a vital role to enhance
    the energy storage capability of electrode materials and opening up a new era for future
    technologies through electrochemical supercapacitors. Present effort portrays the growth
    of nanostructured bismuth vanadate (BiVO4) as an active electrode for supercapacitor
    application by using ease and industry scalable successive ionic layer adsorption and re-
    action (SILAR) method. Structural analysis reveals the development of orthorhombic
    structured BiVO4 with spongy nano-pebbles like surface architecture. Synthesized BiVO4
    electrode yields remarkable capacitance of 707 F/g @3 mV/s scan rate. Faradaic and
    capacitive type contributions have been evaluated for in-depth understanding along with
    the estimation of electrochemical active surface area. Electrochemical impedance spec-
    troscopy (EIS) analysis of BiVO4 electrode exhibits 5.723 and 0.89 U cm2 values of series and
    charge transfer resistances, respectively. Interestingly, BiVO4 electrode delivers
    outstanding capacitive retention of 102% even at 3500 cycles, indicating its potential candidature for the advancement in high capability supercapacitors with excellent stability
    for the future technologies.

keywords

  • bivo4; ecsa; silar; spongy nano-pebbles; supercapacitor