Multifunctional TiO₂–C/MnO₂ Core–Double-Shell Nanowire Arrays as High-Performance 3D Electrodes for Lithium Ion Batteries

Abstract

The unique TiO2-C/MnO2 core-double-shell nanowires are synthesized for the first time using as anode materials for lithium ion batteries (LIBs). They combine both advantages from TiO2 such as excellent cycle stability and MnO2 with high capacity (1230 mA h g(-1)). The additional C interlayer intends to improve the electrical conductivity. The self-supported nanowire arrays grown directly on current-collecting substrates greatly simplify the fabrication processing of electrodes without applying binder and conductive additives. Each nanowire is anchored to the current collector, leading to fast charge transfer. The unique one-dimensional core-double-shell nanowires exhibit enhanced electrochemical performance with a higher discharge/charge capacity, superior rate capability, and longer cycling lifetime.

Graphene-wrapped hierarchical TiO2 nanoflower composites with enhanced photocatalytic performance

“…77 Hydrothermal and solvothermal methods alone account for the synthesis of nanoparticles, 79 nanotubes, 80 nanosheets, 81 nanobelts, 82 nanorods, 83 , nanowires, 84 nanowire arrays, 85 and aerogels. 86 Hierarchical morphologies are becoming an important part of the photocatalysis research due to the many benefits of combining different morphologies into one material.…”

Recent Progress in Self‐Supported Metal Oxide Nanoarray Electrodes for Advanced Lithium‐Ion Batteries

“…For example, unique TiO 2 ‐C/MnO 2 core‐double‐shell nanowire arrays on Ti foil were fabricated as a heterostructured nanoarray anode for LIBs, and the fabrication process is shown in Figure 8 a 117. TiO 2 nanowires on Ti foil were first prepared by alkali hydrothermal reaction and ion exchange with HCl, followed by calcination.…”

“…b) Cross‐sectional SEM images of TiO 2 −C/MnO 2 nanowires. c) Cycling performance of three different nanowire electrodes beyond 100 cycles at a rate of 1 C. d) Rate performance of three different nanowire electrodes at various current densities from 0.1 to 30 C. Reproduced with permission 117. Copyright 2013, American Chemical Society.…”

Transmission electron microscopy analysis of some transition metal compounds for energy storage and conversion

“…Elemental mapping has been conducted for characterizing the chemical distribution of many coated structures, for example, TiN-BaTiO 3 core-shell particles [123], MnO 2 /TiN nanotube coaxial arrays [124], TiN-porous carbon [125], TiN@Si core-shell nanorods [126], TiO 2 -C/MnO 2 core-shell nanowires [127] and so on.…”