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.

DOI: 10.1002/anie.201602631

http://onlinelibrary.wiley.com/doi/10.1002/anie.201602631/abstract