The Ti@MoOx nanorod array as a three dimensional film electrode for micro-supercapacitors

• Ti nanorod arrays were grown by oblique angle deposition method.
• Ti@MoOx core–shell nanorod arrays were prepared by electrodeposition.
• Ti@MoOx nanorod arrays exhibit superior electrochemical properties.
• Rate capability is remarkably improved after post-annealing in H2/Ar.

Ti@MoOx core–shell nanorod arrays with diameters within 100 nm were fabricated by electrodepositing MoOx on a Ti nanorod array prepared by oblique angle deposition. A high areal capacitance of 27 mF cm− 2 and satisfactory cycling stability were obtained. After post-annealing, MoO2 grains were introduced to enhance the rate capability, suggesting a potential pseudocapacitive micro-electrode.