Anomalous Interfacial Lithium Storage in Graphene/TiO2 for Lithium Ion Batteries
- 2 October 2014
- journal article
- Published by American Chemical Society (ACS) in ACS Applied Materials & Interfaces
- Vol. 6 (20), 18147-18151
- https://doi.org/10.1021/am5050423
Abstract
Graphene/metal-oxide nanocomposites have been widely studied as anode materials for lithium ion batteries and exhibit much higher lithium storage capacity beyond their theoretical capacity through mechanisms that are still poorly understood. In this research, we present a comprehensive understanding in microscale of the discharge process of graphene/TiO2 containing surface, bulk, and interfacial lithium storage based on the first-principles total energy calculations. It is revealed that interfacial oxygen atoms play an important role on the interfacial lithium storage. The additional capacity originating from surface and interfacial lithium storage via an electrostatic capacitive mechanism contributes significantly to the electrode capacity. The research demonstrates that for nanocomposites used in energy storage materials, electrode and capacitor behavior could be optimized to develop high-performance electrode materials with the balance of storage capacity and rate.Keywords
Funding Information
- European Commission (1206)
- Ministry of Science and Technology of the People's Republic of China (2012CB825700)
- National Natural Science Foundation of China (11474216, 51272173, 51371157)
- Innovation Foundation of Tianjin University
- Central People's Government of the People's Republic of China (1206)
- Tianjin Province (12ZCZDGX00800)
This publication has 24 references indexed in Scilit:
- Free Standing Reduced Graphene Oxide Film Cathodes for Lithium Ion BatteriesACS Applied Materials & Interfaces, 2013
- Origin of additional capacities in metal oxide lithium-ion battery electrodesNature Materials, 2013
- Facile Preparation of Ordered Porous Graphene–Metal Oxide@C Binder‐Free Electrodes with High Li Storage PerformanceSmall, 2013
- Graphene-modified LiFePO4 cathode for lithium ion battery beyond theoretical capacityNature Communications, 2013
- Graphene: A Two‐Dimensional Platform for Lithium StorageSmall, 2013
- Scalable Synthesis of TiO2/Graphene Nanostructured Composite with High-Rate Performance for Lithium Ion BatteriesACS Nano, 2012
- Metal Oxide Hollow Nanostructures for Lithium‐ion BatteriesAdvanced Materials, 2012
- Sandwich‐Like, Graphene‐Based Titania Nanosheets with High Surface Area for Fast Lithium StorageAdvanced Materials, 2011
- Efficiency of ab-initio total energy calculations for metals and semiconductors using a plane-wave basis setComputational Materials Science, 1996
- Ab initiomolecular dynamics for liquid metalsPhysical Review B, 1993