Large-scale low temperature fabrication of SnO2hollow/nanoporous nanostructures: the template-engaged replacement reaction mechanism and high-rate lithium storage
- 5 August 2014
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Nanoscale
- Vol. 6 (19), 11411-11418
- https://doi.org/10.1039/c4nr03395g
Abstract
The morphology-controlled synthesis of SnO2 hollow/nanoporous nanostructures (nanotubes, urchin-like morphologies and nanospheres) was achieved via a template-engaged replacement reaction at a mild temperature (lower than 80 °C). The formation mechanism of hollow interior and nanoporous walls for the obtained SnO2 nanostructures (SnO2 nanotubes were used as an example) was investigated based on TEM and HRTEM observations during different reaction stages. It is found that bridge voids firstly form at the MnO2/SnO2 interface, followed by the inward development of voids before the MnO2 core is completely consumed. Two types of short-circuited galvanic cells, MnO2/Mn2+∣SnO2/Sn2+ and concentration cell-SnO2/Sn2+ (interior)∣SnO2/Sn2+ (exterior), are probably responsible for the formation of SnO2 nanotubes and outward growth of SnO2 along MnO2. Moreover, the calculation result of the outer diameter of SnO2 nanotubes is in good agreement with the observation results by SEM and TEM. When evaluated as anodes for lithium ion batteries (LIBs), the three SnO2 nanostructures exhibit superior rate capability and cycling performance. Especially, SnO2 nanotubes present the best rate capability: specific capacities of above 800 mA h g−1 at 200 mA g−1 and about 500 mA h g−1 at 4000 mA g−1 were achieved, respectively. Importantly, the 1D morphology of SnO2 nanotubes can be well preserved after prolonged cycling at a relatively high current density, indicating good structural stability of the resulting nanotubes during the Li+ insertion/extraction process. These results indicate that the obtained SnO2 hollow/nanoporous nanostructures would be promising anode materials for next-generation LIBs.This publication has 49 references indexed in Scilit:
- Galvanic Replacement Reactions in Metal Oxide NanocrystalsScience, 2013
- Fully Reversible Conversion between SnO2 and Sn in SWNTs@SnO2@PPy Coaxial Nanocable As High Performance Anode Material for Lithium Ion BatteriesThe Journal of Physical Chemistry C, 2012
- N‐Doped Graphene‐SnO2 Sandwich Paper for High‐Performance Lithium‐Ion BatteriesAdvanced Functional Materials, 2012
- Tin Oxide with Controlled Morphology and Crystallinity by Atomic Layer Deposition onto Graphene Nanosheets for Enhanced Lithium StorageAdvanced Functional Materials, 2012
- Nanoscale Si coating on the pore walls of SnO2nanotube anode for Li rechargeable batteriesChemical Communications, 2010
- Reaction of Br2 with Adsorbed CO on Pt, Studied by the Surface Interrogation Mode of Scanning Electrochemical MicroscopyJournal of the American Chemical Society, 2009
- Enhanced Cyclic Performance and Lithium Storage Capacity of SnO2/Graphene Nanoporous Electrodes with Three-Dimensionally Delaminated Flexible StructureNano Letters, 2008
- High-Sensitivity Humidity Sensor Based on a Single SnO2 NanowireJournal of the American Chemical Society, 2007
- Laser Ablation Synthesis and Electron Transport Studies of Tin Oxide NanowiresAdvanced Materials, 2003
- Reductive dissolution of microparticulate manganese oxidesJournal of Solid State Electrochemistry, 2000