Three-Dimensional Branched TiO₂ Architectures in Controllable Bloom for Advanced Lithium-Ion Batteries

Abstract

Three-dimensional branched TiO2 architectures (3D BTA) with controllable morphologies were synthesized via a facile template-free one-pot solvothermal route. The volume ratio of deionized water (DI water) and diethylene glycol in solvothermal process is key to the formation of 3D BTA assembled by nanowire-coated TiO2 dendrites, which combines the advantages of 3D hierarchical structure and 1D nanoscale building blocks. Benefiting from such unique structural features, the BTA in full bloom achieved significantly increased specific surface areas and shortened Li(+) ion/electrons diffusion pathway. The lithium-ion batteries based on BTA in full bloom exhibited remarkably enhanced reversible specific capacity and rate performance, attributing to the high contact area with the electrolyte and the short solid state diffusion pathway for Li(+) ion/electrons promoting lithium insertion and extraction.

In Situ Fabrication of Branched TiO2/C Nanofibers as Binder‐Free and Free‐Standing Anodes for High‐Performance Sodium‐Ion Batteries

“…On the other hand, the in situ synthesis has been proven to be a promising method to avoid this problem. Wang et al demonstrated a facile one‐pot strategy to synthesize branched TiO 2 architectures, the reversible specific capacity, and rate performance was remarkably enhanced for LIBs. Previously, our group fabricated branched TiO 2 nanofibers via an in situ preparation method, which also possessed excellent Li + storage performance …”

In Situ Fabrication of Hierarchically Branched TiO2 Nanostructures: Enhanced Performance in Photocatalytic H2 Evolution and Li–Ion Batteries

“…To date, a variety of techniques derived from the epitaxial growth have been developed to prepare hierarchically branched TiO 2 (HB‐TiO 2 ) nanostructures, which tolerated some of abovementioned disadvantages, to some extent. On the other hand, the in situ synthesis has proven to be a promising alternative that was capable of circumventing such defects; consequently, the products displayed satisfactory performance in diverse fields . Wang et al prepared branched TiO 2 architectures by the in situ hydrothermal process, and this nanomaterial displayed improved reversible specific capacity and rate performance as anode for Li‐ion batteries, attributing to its high surface area and the short migration distance for Li + ion/electrons.…”

“…Wang et al prepared branched TiO 2 architectures by the in situ hydrothermal process, and this nanomaterial displayed improved reversible specific capacity and rate performance as anode for Li‐ion batteries, attributing to its high surface area and the short migration distance for Li + ion/electrons. [13a]…”

“…Moreover, the size of the secondary nanostructures needs to be further reduced. Li et al[13b] also fabricated TiO 2 nanofibers with special surface structures via the SiO 2 ‐assisted alkali‐hydrothermal method, which exhibited higher activity over photocatalytic degradation of Congo Red than that of the traditional TiO 2 nanofibers. Hwang et al prepared multiscale porous TiO 2 nanofibers by hydrofluoric acid etching SiO 2 /TiO 2 nanofibers.…”

“…Hwang et al prepared multiscale porous TiO 2 nanofibers by hydrofluoric acid etching SiO 2 /TiO 2 nanofibers. [13c] ZnO/TiO 2 and Al 2 O 3 /TiO 2 nanofibers were also used as substrates to synthesize porous TiO 2 by the in situ etching reaction. [13d,e] The branched TiO 2 nanostructures obtained via an in situ process were employed as dye‐sensitized solar cell photoanodes delivering excellent power conversion efficiency of 7.86%.…”