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<p>Traditional supercapacitor electrode materials possess low conductivity forcing to find the alternate material combinations. In this context, metal vanadates are explored as one among the variable alternates and showed better electrochemical performance because of their advantageous unique physico-chemical features, rapid electron transfer, better rate performance and stability. In this work, we have prepared cerium vanadate (CeVO<sub>4</sub>) and MWCNT-blended CeVO<sub>4</sub> with worm-like morphology using cost-effective low-temperature solution growth approach. The presence of MWCNT with the CeVO<sub>4</sub> nanostructures provided additional electro active sites leading the enhanced electrochemical performance including enhanced specific capacitance, rate performance, lower charge transfer resistance and good cyclic stability. We have assembled a hybrid supercapacitor full cell using the MWCNT-blended CeVO<sub>4</sub> electrode which exhibits a high energy density of 38.8 Wh kg<sup>−1</sup> at a power density of 614 W kg<sup>−1</sup>. These results indicate the MWCNT/ CeVO<sub>4</sub> nanostructures could be utilized for supercapacitor electrode application.</p>

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MWCNT/CeVO4 nanostructured composite as electrochemical supercapacitor electrodes

  • 期刊论文

  • 发表日期：

    2025年7月2日

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  • B. Saravanakumar,
  • K. Vijayakumar,
  • V. Regina Delcy,
  • L. Chitra,
  • D. Ganeshkumar,
  • A. Zulaiga,
  • V. C. Hariharan,
  • P. Gowtham

摘要

Traditional supercapacitor electrode materials possess low conductivity forcing to find the alternate material combinations. In this context, metal vanadates are explored as one among the variable alternates and showed better electrochemical performance because of their advantageous unique physico-chemical features, rapid electron transfer, better rate performance and stability. In this work, we have prepared cerium vanadate (CeVO4) and MWCNT-blended CeVO4 with worm-like morphology using cost-effective low-temperature solution growth approach. The presence of MWCNT with the CeVO4 nanostructures provided additional electro active sites leading the enhanced electrochemical performance including enhanced specific capacitance, rate performance, lower charge transfer resistance and good cyclic stability. We have assembled a hybrid supercapacitor full cell using the MWCNT-blended CeVO4 electrode which exhibits a high energy density of 38.8 Wh kg−1 at a power density of 614 W kg−1. These results indicate the MWCNT/ CeVO4 nanostructures could be utilized for supercapacitor electrode application.