Dual‐Doped Molybdenum Trioxide Nanowires: A Bifunctional Anode for Fiber‐Shaped Asymmetric Supercapacitors and Microbial Fuel Cells

Abstract

A novel in situ N and low-valence-state Mo dual doping strategy was employed to significantly improve the conductivity, active-site accessibility, and electrochemical stability of MoO3 , drastically boosting its electrochemical properties. Consequently, our optimized N-MoO3-x nanowires exhibited exceptional performances as a bifunctional anode material for both fiber-shaped asymmetric supercapacitors (ASCs) and microbial fuel cells (MFCs). The flexible fiber-shaped ASC and MFC device based on the N-MoO3-x anode could deliver an unprecedentedly high energy density of 2.29 mWh cm(-3) and a remarkable power density of 0.76 μW cm(-1) , respectively. Such a bifunctional fiber-shaped N-MoO3-x electrode opens the way to integrate the electricity generation and storage for self-powered sources.

New Insights into the Operating Voltage of Aqueous Supercapacitors

“…To better select the appropriate electrodes for asymmetric SCs, Figure summarizes the available potential ranges of different active materials ,,. Notably, these data are just for reference, and will change with different electrolytes and different structures.…”

Facile Synthesis ZnS/ZnO/Ni(OH)2 Composites Grown on Ni Foam: A Bifunctional Materials for Photocatalysts and Supercapacitors

“…synthesized dual-doped molybdenum trioxide nanowires, which exhibited enhanced electrochemical properties for both fiber-shaped asymmetric supercapacitors and microbial fuel cells. This bifunctional anode material could be used for energy conversion and storage devices 4 . Thus it is possible to design new bifunctional materials with the function of both storing energy and treating sewage.…”

Resin‐Derived Ni3S2/Carbon Nanocomposite for Advanced Rechargeable Aqueous Zn‐Based Batteries

“…The Nyquist plots fit well with the equivalent circuit, which are inserted in Figure d. It is worth noting that the CPE is the constant phase element, R ct means the charge transfer resistance, the Z w is the Warburg impedance, and the R e stands for the total ohmic resistance . From the plots, the Ni 3 S 2 /carbon‐5 shows a smallest charge transfer resistance, indicating a good electrical conductivity of the high carbon content sample.…”