Porous Dual‐Layered MoOx Nanotube Arrays with Highly Conductive TiN Cores for Supercapacitors. Issue 4 (23rd December 2014)

• Record Type: Journal Article
• Authors: Peng, Xiang; Huo, Kaifu; Fu, Jijiang; Gao, Biao; Wang, Lei; Hu, Liangsheng; Zhang, Xuming; Chu, Paul K.
• Is Part Of: ChemElectroChem. Volume 2:Issue 4(2015)
• Page Start: 512
• Page End: 517
• Publication Date: 2014-12-23
• Subjects: Electrochemistry -- Periodicals; 541.37
• DOI: 10.1002/celc.201402349
• Languages: English
• ISSNs: 2196-0216

Abstract

<abstract abstract-type="main" xml:lang="en"> <title>Abstract</title> <p>Porous dual‐layered molybdenum oxide (MoO_{<italic>x</italic>}) nanotube arrays (NTAs) with highly conductive titanium nitride (TiN) cores (MoO_{<italic>x</italic>}/TiN/MoO_{<italic>x</italic>} NTAs) are fabricated by depositing MoO_{<italic>x</italic>} on porous TiN NTAs produced by nitriding as‐anodized TiO₂ NTAs on Ti foils. The highly conductive TiN facilitates electron transfer and the porous MoO_{<italic>x</italic>} wall allows the electrolyte to permeate the nanotubes readily, maximizing the active sites of the MoO_{<italic>x</italic>} electroactive material to improve the specific capacitance and rate capability. The coaxial MoO_{<italic>x</italic>}/TiN/MoO_{<italic>x</italic>} NTA electrode shows a high specific capacitance of 97 mF cm⁻² (323 F g⁻¹) at a current density of 1 mA cm⁻², and 60 % capacitance is retained when the current density is increased 20 times. A symmetrical device based on the MoO_{<italic>x</italic>}/TiN/MoO_{<italic>x</italic>} NTA electrode exhibits a capacitance as high as 24 F cm⁻³ (based on the volume of MoO_{<italic>x</italic>}/TiN/MoO_{<italic>x</italic>} NTAs) and no significant decay is observed after charging/discharging for 10 000 cycles.</p> </abstract>