Abstract

To meet the requirement of clean and efficient energy storage system for practical applications, supercapacitors (SCs) to be promising candidates for the next-generation energy storage devices have received tremendous attentions. In fact, the SCs can have broader potential if they are designed as flexible power supplies for wearable electronic devices [1–3]. Herein, we develop the first flexible, low-cost and high-performance hybrid electrode based on MnO₂ nanotubes (NTs) and carbon nanotubes (CNTs) by employing a facile vacuum-filtering method. Subsequently, the as-synthesized freestanding CNT/MnO₂ NT hybrid electrodes are assembled in the form of solid-state SC devices and the superior mechanical and electrochemical performance of these SCs have been demonstrated due to their unique design and micro/nanostructure. Finally, these SCs are integrated in a flexible power band that can drive watches and LEDs. The solid-state SC devices with outstanding flexibility and stability clearly demonstrate their broad applications as flexible, low-cost, high-performance power supplies in wearable electronic devices [4].

© 2015 Optical Society of America