Electrochemical energy storage of TiO2 anodic oxide with a novel honeycomb morphology was characterized and compared with that of standard TiO2 nanotubes. The new morphology consists of several smaller-diameter (similar to 20 nm) nanotubes stacked inside of each honeycomb like hemisphere. The honeycomb like hemispheres are 160-200 nm in diameter with inter-wall thicknesses of 20-50 nm grown onto a planar barrier layer. The dual-layered honey-comb oxide has a total thickness of about 350-500 nm and high surface area. Cyclic voltammetry and galvanostatic charge-discharge tests were carried out on these oxide samples in as-anodized and thermally annealed conditions using 0.1 M NaOH and 0.1 M LiCl + 0.1 M HCl electrolytes. The honeycomb arrays showed an areal capacitance of 56 mF cm(-2) at 100 mV s(-1) scan rate, and 0.75 mFcm(-2) at a current density of 0.1 mA cm(-2). The areal capacitance of the honeycomb structured samples were about 60% higher than that of the regular TiO2 nanotubes. The honeycomb structured TiO2 also showed 33% higher capacitance retention after 10,000 cycles than that of regular TiO2 nano tubes. The higher capacitance retention could be attributed to the enhanced structural stability of the honeycomb structures. (C) 2017 Elsevier B.V. All rights reserved.