SnO₂@TiO₂ Heterojunction Nanostructures for Lithium‐Ion Batteries and Self‐Powered UV Photodetectors with Improved Performances

Abstract

To overcome the issue of inferior cycling stability and rate capacity for SnO2 anode materials in lithium‐ion batteries, an effective strategy is explored to prepare a hybrid material consisting of rutile SnO2 nanoparticles and rutile TiO2 nanorods, considering not only the small lattice mismatch to achieve a better composited lattice structure but also their superior synergistic effect in electrochemical performances. The as‐prepared SnO2@TiO2 material, directly formed on a carbon cloth as a binder‐free anode, exhibits a reversible capacity of 700 mAh g−1 after 100 discharge/charge cycles at 200 mA g−1, as well as excellent cycling stability and rate capacity. After being calcinated at high temperature, the produced hollow SnO2@TiO2 hybrid microtubes were directly used to fabricate photoelectrochemical (PEC) UV detectors for future devices with self‐powered function. A high photocurrent response of 0.1 mA cm−2 was observed, together with an excellent self‐powered and fast response and “visible blind” characteristics. Such a hybrid material could achieve a complementary effect in lithium‐ion batteries and a superior band gap match in photovoltaic devices, and could consequently be extended to applications such as dye‐sensitized solar cells and supercapacitors.

Flexible fiber energy storage and integrated devices: recent progress and perspectives

“…Over the past few decades, a lot of active materials with nanostructures, such as CNTs [27][28][29], graphene [30][31][32][33], metal oxide [34][35][36][37], metal sulfide [38][39][40][41] and their composites [42][43][44][45], have been extensively studied as electrodes for SCs and LIBs, most of which showed favorable properties. Just as with conventional SCs and LIBs, it is necessary to design and develop novel electrodes with a wire shape to fabricate wire devices that can store energy.…”

Highly responsive UV-photodetectors based on single electrospun TiO2 nanofibres

“…1, 2 Among the different transparent materials, TiO2 is one of the most studied partially because of its interesting properties and promising applications in photocatalysis, solar cells, batteries or gas sensors. [3][4][5][6][7][8][9][10][11][12][13][14] Moreover, from the synthesis point of view, TiO2 results especially relevant because of the different synthetic methods that can be employed to obtain this material. For instance, TiO2 UV photodetectors fabricated by sol-gel, potentiostatic anodization or radio-frequency magnetron sputtering have been recently demonstrated.…”

Elaborately Designed Hierarchical Heterostructures Consisting of Carbon‐Coated TiO2(B) Nanosheets Decorated with Fe3O4 Nanoparticles for Remarkable Synergy in High‐Rate Lithium Storage

“…Here we report elaborately designed hierarchical heterostructures, consisting of carbon-coated TiO 2 (B) nanosheets decorated with Fe 3 O 4 nanoparticles, based on a one-step self-assembly strategy through van der Waals interactions. [ 57 ] We stress that compared to other hybridization approaches based on hydrothermal synthesis, [46][47][48][50][51][52][53]55,56 ] atomic layer deposition, [ 49 ] and thermal pyrolysis, [ 54 ] our one-step self-assembly strategy is really facile and energy-effi cient, since it does not require harsh …”