Enhanced Electrochemical Performance of Electropolymerized Self-Organized TiO2 Nanotubes Fabricated by Anodization of Ti Grid

Abstract

Self-organized Titanium dioxide (TiO 2) nanotubes grown on Ti grid acting as anode for Li-ion microbatteries were prepared via an electrochemical anodization. By tuning the anodization time, the morphology and length of the nanotubes were investigated by scanning electron microscope. When the anodization time reached 1.5 h, the TiO 2 nts/Ti grid anode showed a well-defined nanotubes, which are stable, well-adherent ∼90 nm with a length of 1.9 ± 0.1 µm. Due to their high surface utilization, surface area, and material loading per unit area, TiO 2 nts/Ti grid anode using polymer electrolyte exhibited a high areal capacity of 376 µAh cm −2 at C/10 rate and a stable discharge plateau at 1.8 V without using a polymer binder and conductive additive. The storage capacity of the TiO 2 nts/Ti grid after 10 cycles is 15 times higher compared to previous reports using planar Ti foils.

Direct Pre-lithiation of Electropolymerized Carbon Nanotubes for Enhanced Cycling Performance of Flexible Li-Ion Micro-Batteries

“…For the pristine CNT samples, SPAPE-coated CNT attains higher reversible capacity of 463 mAh g −1 (170 μAh cm −2 ) compared to pristine CNT (242 mAh g −1 , 89 μAh cm −2 ), while for the prelithiated samples, the pristine CNT and SPAPE-coated CNT yielded a reversible capacity of 356 mAh g −1 (131 μAh cm −2 ) and 508 mAh g −1 (187 μAh cm −2 ), respectively over 500 cycles at 10 C rate ( Figure 4b). Thus, it is clear that coating CNT with the polymer electrolyte via electropolymerization reaction has a beneficial impact, resulting in the improvement of the cell performance [33,46,56,57]. The enhancement can be attributed to the combination of two effects: the larger electrode/electrolyte interface resulting in improved charge transport and a better penetration of the polymer electrolyte onto the carbon nanotube surfaces [33].…”

Chemical Gas Sensors Studied at SENSOR Lab, Brescia (Italy): From Conventional to Energy-Efficient and Biocompatible Composite Structures

“…The procedure is mainly performed at room temperature (RT). The tubular structures can be prepared on different kinds of substrates for the fabrication of new generation functional devices [55][56][57][58][59]. The detailed description of the anodic formation of metal oxide nanotubes has been reported in previous works [15,53,54].…”

All-Solid-State Lithium Ion Batteries Using Self-Organized TiO2 Nanotubes Grown from Ti-6Al-4V Alloy

“…[8]. Among the various nanostructured oxide materials, special attention has been directed to TiO 2 nanotubes (TiO 2 NTs) because they have been already explored for many applications such as solar cells [9][10][11], sensors [12,13], photocatalysis [14][15][16], and rechargeable batteries [17,18]. In addition, the TiO 2 NTs materials have been extensively studied as anode material, thanks to the high surface-to-volume ratio leading to the enhanced electrochemical properties [19].…”