High Performance\nof PPy/C-HCPs Composite Electrodes\nfor Removing Low-Concentration Cu<sup>2+</sup> Prepared by Electrospinning\nand Electropolymerization Costep Method

Capacitive\ndeionization (CDI) technology holds immense promise\nfor the effective removal of copper ions from solution medium. However,\nthe widespread application of CDI is hindered by limitations arising\nfrom the electrode formation process, which impacts the electrode’s\nmass transfer and adsorption performance. In pursuit of refining the\nelectrode formation process, this study employs a one-step simultaneous\nelectrospinning and electropolymerization method to fabricate PPy/C-HCPs\ncomposite electrodes. The results indicate that the fabricated PPy/C-HCPs\ncomposite electrode possesses a high specific surface area of 458.98\nm<sup>2</sup>/g, which is 1.83 times that of the electrode prepared\nusing the traditional electrodeposition method (251.26 m<sup>2</sup>/g). Furthermore, the maximum adsorption capacity for Cu<sup>2+</sup> reaches 82.83 mg/g, marking a 2.19-fold enhancement compared to\nelectrodes prepared through the same electrodeposition process (37.81\nmg/g). Moreover, even after 1000 repetitive scans, the electrode exhibits\nexceptional cyclic stability, with only a marginal 1.42% decrease\nin specific capacitance. This study introduces a streamlined process\nfor the preparation of high-performance electrode materials, providing\na foundation for the shaping applications of polypyrrole composite\nelectrode. Additionally, it presents a distinctive approach for the\npreparation of electrodes for CDI and supercapacitors, offering a\nunique perspective in the field.