Adjusting the Chemical Bonding of SnO2@CNT Composite for Enhanced Conversion Reaction Kinetics
- 22 June 2017
- Vol. 13 (31)
- https://doi.org/10.1002/smll.201700656
Abstract
Carbon nanotubes (CNTs) with excellent electron conductivity are widely used to improve the electrochemical performance of the SnO2 anode. However, the chemical bonding between SnO2 and CNTs is not clearly elucidated despite it may affect the lithiation/delithiation behavior greatly. In this work, an SnO2@CNT composite with SnC and SnOC bonds as a linkage bridge is reported and the influence of the SnC and SnOC bonds on the lithium storage properties is revealed. It is found that the SnC bond can act as an ultrafast electron transfer path, facilitating the reversible conversion reaction between Sn and Li2O to form SnO2. Therefore, the SnO2@CNT composite with more SnC bond shows high reversible capacity and nearly half capacity contributes from conversion reaction. It is opposite for the SnO2@CNT composite with more SnOC bond that the electrons cannot be transferred directly to CNTs, resulting in depressed conversion reaction kinetics. Consequently, this work can provide new insight for exploration and design of metal oxide/carbon composite anode materials in lithium-ion battery.Keywords
Funding Information
- National Natural Science Foundation of China (51472152)
- China Postdoctoral Science Foundation (2016M592897XB)
- China Postdoctoral Science Foundation
This publication has 62 references indexed in Scilit:
- SnO2@PANI Core–Shell Nanorod Arrays on 3D Graphite Foam: A High-Performance Integrated Electrode for Lithium-Ion BatteriesACS Applied Materials & Interfaces, 2017
- Enhanced Structural and Electrochemical Stability of Self-Similar Rice-Shaped SnO2 NanoparticlesACS Applied Materials & Interfaces, 2017
- Fabrication of amorphous SnO2@C nanofibers as anode for lithium-ion batteriesMaterials Letters, 2017
- There-dimensional porous carbon network encapsulated SnO 2 quantum dots as anode materials for high-rate lithium ion batteriesElectrochimica Acta, 2016
- In situ growth of SnO 2 nanoparticles in heteroatoms doped cross-linked carbon frameworks for lithium ion batteries anodesElectrochimica Acta, 2016
- Fabrication of voids-involved SnO2@C nanofibers electrodes with highly reversible Sn/SnO2 conversion and much enhanced coulombic efficiency for lithium-ion batteriesJournal of Power Sources, 2016
- Room-temperature synthesis of colloidal SnO2 quantum dot solution and ex-situ deposition on carbon nanotubes as anode materials for lithium ion batteriesJournal of Alloys and Compounds, 2016
- Carbon coated SnO2nanoparticles anchored on CNT as a superior anode material for lithium-ion batteriesNanoscale, 2016
- Branched CNT@SnO2 nanorods@carbon hierarchical heterostructures for lithium ion batteries with high reversibility and rate capabilityJournal of Materials Chemistry A, 2014
- Graphene Nanoribbon and Nanostructured SnO2Composite Anodes for Lithium Ion BatteriesACS Nano, 2013