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<p>Bimetallic phosphate has developed as an excellent electrode material for&#xa0;supercapacitors owing to its high theoretic capacity and eco-friendliness. Herein, a facile co-precipitation method was successfully utilized to synthesize the cobalt phosphate (Co<sub>3</sub>(PO<sub>4</sub>)<sub>2</sub>), chromium phosphate (CrPO<sub>4</sub>), and their composite (Co<sub>3</sub>(PO<sub>4</sub>)<sub>2</sub>/CrPO<sub>4</sub>). In their electrochemical results, the prepared electrode materials exhibited maximum specific capacitances of 645.8, 205.11, and 944.6 F/g at lower scan rate of 10&#xa0;mV/s through 3-electrode system, respectively. Furthermore, the prepared composite reveals the exponential specific capacity of 244.3 C/g as compared to the individual prepared Co<sub>3</sub>(PO<sub>4</sub>)<sub>2</sub> (129.4 C/g) and CrPO<sub>4</sub> (105.5 C/g) at a current density (CD) of 0.7 A/g. The Co<sub>3</sub>(PO<sub>4</sub>)<sub>2</sub>/CrPO<sub>4</sub> composite exhibits a high energy density (Ed) of 17.1 Wh/kg and power density (Pd) of 4166.6 W/kg with an impressive capacity retention of 91.80% with a Coulombic efficiency of 98.72% after 10000 GCD cycles. In addition, the Co<sub>3</sub>(PO<sub>4</sub>)<sub>2</sub>/CrPO<sub>4</sub> composite was evaluated by a theoretical modeling analysis to investigate capacitive and diffusion-controlled processes, revealing the high and low capacitive contribution of 76.82% and 51.16% at scan rates of 100 and 10&#xa0;mV/s, respectively. The remarkable electrochemical performance of Co<sub>3</sub>(PO<sub>4</sub>)<sub>2</sub>/CrPO<sub>4</sub> establishes it as a significant electrode material for supercapacitor applications. Our research establishes a foundation for a new type of electrode exhibiting improved electrochemical properties, providing a green and sustainable alternative for the development of energy storage.</p>

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Exploring the electrochemical activity of bimetallic phosphate (Co3(PO4)2/CrPO4)-based electrode material for supercapacitor applications

  • 期刊论文

  • 发表日期：

    2025年11月10日

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  • Majed Y. A. Almashnowi,
  • Mohsenah H. J. Mashniwi,
  • Muneerah Alomar,
  • Norah Salim Alhebshe,
  • Mohd Imran,
  • Syed Kashif Ali,
  • Muhammad Shahid Rashid

摘要

Bimetallic phosphate has developed as an excellent electrode material for supercapacitors owing to its high theoretic capacity and eco-friendliness. Herein, a facile co-precipitation method was successfully utilized to synthesize the cobalt phosphate (Co3(PO4)2), chromium phosphate (CrPO4), and their composite (Co3(PO4)2/CrPO4). In their electrochemical results, the prepared electrode materials exhibited maximum specific capacitances of 645.8, 205.11, and 944.6 F/g at lower scan rate of 10 mV/s through 3-electrode system, respectively. Furthermore, the prepared composite reveals the exponential specific capacity of 244.3 C/g as compared to the individual prepared Co3(PO4)2 (129.4 C/g) and CrPO4 (105.5 C/g) at a current density (CD) of 0.7 A/g. The Co3(PO4)2/CrPO4 composite exhibits a high energy density (Ed) of 17.1 Wh/kg and power density (Pd) of 4166.6 W/kg with an impressive capacity retention of 91.80% with a Coulombic efficiency of 98.72% after 10000 GCD cycles. In addition, the Co3(PO4)2/CrPO4 composite was evaluated by a theoretical modeling analysis to investigate capacitive and diffusion-controlled processes, revealing the high and low capacitive contribution of 76.82% and 51.16% at scan rates of 100 and 10 mV/s, respectively. The remarkable electrochemical performance of Co3(PO4)2/CrPO4 establishes it as a significant electrode material for supercapacitor applications. Our research establishes a foundation for a new type of electrode exhibiting improved electrochemical properties, providing a green and sustainable alternative for the development of energy storage.