Synthesis of FeP nanotube arrays as negative electrode for solid-state asymmetric supercapacitor

Abstract

Recently, metal phosphides have attracted considerable attention as promising electrode materials for supercapacitors. In this work, FeP nanotube arrays have been successfully synthesized on carbon cloth using ZnO nanorod arrays as the sacrificial templets, via a phosphidation process. The dimensions of the FeP nanotubes are characterized using SEM and TEM showing the diameter to be approximately 200 nm and with a wall thickness of 50-100 nm. The tubular structure of FeP nanotubes provides a facile ion pathway and reduced inner inactive material, thus they are favorable for supercapacitor applications. As a result, the as-synthesized FeP nanotube arrays deliver an improved specific capacitance of 149.11 F g −1 and a high areal capacitance of 300.1 mF cm −2 at a current density of 1 mA cm −2 . Furthermore, an MnO 2 //FeP solid-state asymmetric supercapacitor was fabricated with a high areal capacitance of 142 mF cm −2 , which indicates the great potential of FeP nanotube arrays to be a high-performing negative electrode material for supercapacitors.

Iron phosphide anchored nanoporous carbon as an efficient electrode for supercapacitors and the oxygen reduction reaction

“…50,51 In previous studies, arrays from FeP nanotubes and nanorods were used as negative electrodes for supercapacitor application and showed only 41% and 24.19% retention aer 5000 cycles, respectively. 29,31 Aer coating FeP nanorod arrays with PEDOT, the stability increased to 82.1%. 31 Porous N/P co-doped carbon showed capacitance retention of 86.3% aer 10 000 cycles.…”

“…26,28 Moreover, the poor stability of ironbased materials limits their electrochemical properties. [29][30][31][32] Thus, its combination with carbon is an effective strategy for keeping structural stability, improving electronic conductivity during cycling, and obtaining high surface area materials. [33][34][35] Accordingly, providing a safe synthetic method to obtain FeP/carbon (FeP/C) materials with high surface areas and high stability while exploring their performance as supercapacitors and ORR are highly important for satisfying the current needs for energy.…”

A Review of Electrospun Carbon Nanofiber-Based Negative Electrode Materials for Supercapacitors

“…In this regard, several attempts have been made to obtain anode materials with desirable properties. The major negative electrode materials include tin-based [18,19], copper-based [20], vanadium-based [21,22], MO-based [23,24], iron-based [25][26][27], and carbon-based electrode materials [28][29][30][31][32] (Table 1). We review the carbon fiber-based negative electrode details in this report.…”

A Review of Electrospun Carbon Nanofiber-Based Negative Electrode Materials for Supercapacitors

“…In this regard, several attempts have been made to obtain anode materials with desirable properties. The major negative electrode materials include tin-based [18,19], copper-based [20], vanadium-based [21,22], MO-based [23,24], iron-based [25][26][27] and carbon-based electrode materials [28][29][30][31] (Table 1). We review the carbon fiber-based negative electrode details in this report.…”