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.

A general ligand-assisted self-assembly approach to crystalline mesoporous metal oxides

“…To advance our understanding of the enhancement in OER activity, the electrochemically active surface area (ECSA) of the as-prepared catalysts was tested by electrochemical capacitance surface area measurements [35][36][37][38] . The ECSA is positively proportional to the double-layer capacitance (C dl ) (Fig.…”

Flexible all-solid-state micro-supercapacitor based on Ni fiber electrode coated with MnO2 and reduced graphene oxide via electrochemical deposition

“…Various flexible energy storage devices have been developed to power the flexible/bendable electronic equipment, such as flexible supercapacitors [21][22][23], flexible Li-ion batteries [24] and flexible rechargeable batteries [25].…”

Asymmetric All‐Metal‐Oxide Supercapacitor with Superb Cycle Performance

“…MOs with low work function( or electrochemical potential), such as SnO 2 ,M nO 2 ,a nd ZrO 2 ,a re appropriate for the cathode, [21,22] whereasM Os with high work function, such as MoO 3 ,V 2 O 5 , and WO 3 ,a re advantageous for the anode. [23,24] The work functions of MOs are directly related to their electrochemical redox potentials. [25] The operating voltage of an ASC is determined by its overpotential, which is closely related to the work function differenceb etween the anode and cathode, including the electrolyte.…”