Synthesis of nanocomposites with carbon–SnO₂ dual-shells on TiO₂ nanotubes and their application in lithium ion batteries

Abstract

Through the introduction of well-distributed tin oxide nanocrystals on the surface of pre-prepared TiO2 nanotubes and followed by carbon coating, a novel TiO2 / SnO2-C double-shells nanotube has been synthesized. As an anode material of Li-ion batteries (LIBs), DSNTs exhibit excellent long-term cycling stability (256.0 mAh·g −1 at 1 A·g −1 , negligible capacity decay after 710 cycles) and satisfactory rate capability, which are ascribed to the synergetic effects of a unique combination of material properties in the well-designed conductive matrix: high volume stable titanium dioxide to form one-dimensional (1D) core section to maintain the structures, large theoretical capacity tin oxide as functional layer to increase capacity and high conductive carbon as buffer layer to accelerate charging rate.

Enhancing Catalytic Activity of Titanium Oxide in Lithium–Sulfur Batteries by Band Engineering

“…X-ray diffraction (XRD) patterns in Figure 3A and Figure S10 (Supporting Information) confirm that CNT@TiO 2 and CNT@TiO 2−x can be indexed in accordance with the anatase structure and that sulfur has been successfully incorporated into composites. [24] The presence of TiC bonds are supposed to promote for fast charge transfer at the heterojunction interfaces. [9a,23] X-ray photoelectron spectroscopy (XPS) was performed to reveal the chemical structure of the samples.…”

Spontaneously Formed Mott‐Schottky Electrocatalyst for Lithium‐Sulfur Batteries

“…The G-band represents the existence of graphitic carbon, while the D-band is assigned to a disorders or defects in the graphite structure. [16] The I D /I G values of CNT@TiON and CNT@TiO 2 are 0.96 and 0.24, respectively. The higher I D /I G ratio means more defects in CNT@TiON, implying successful doping of nitrogen atoms in CNTs.…”

In Situ Incorporation of Super‐Small Metallic High Capacity Nanoparticles and Mesoporous Structures for High‐Performance TiO2/SnO2/Sn/Carbon Nanohybrid Lithium‐Ion Battery Anodes

“…Titanium dioxide has been extensively researched as a promising lithium‐ion battery anode candidate in the last few decades . The appropriate lithiation potential (1.5–1.8 V vs Li + /Li) and low volume change upon lithiation enable stable cyclic performance and good operation safety.…”