In-situ nanoscale mapping of surface potential in all-solid-state thin film Li-ion battery using Kelvin probe force microscopy
- 15 March 2012
- journal article
- research article
- Published by AIP Publishing in Journal of Applied Physics
- Vol. 111 (6), 063723
- https://doi.org/10.1063/1.3699214
Abstract
This paper presents an in-situ study by combining contact dc-writing in biased scanning probe microscopy and non-contact Kelvin probe force microscopy to characterize the effect of bias-induced Li+ insertion/extraction on the changes of surface potential of TiO2anode in an all-solid-state thin filmLi-ion battery at nanoscale. With single layer TiO2film as the reference, the factors affecting the changes of the surface potential, including the Fermi energy level shift and charge screening related to TiO2 semiconductor behavior, and bias-induced Li+ intercalation/ de-intercalation related to battery behavior are investigated. Surface potential hysteresis loop can be formed for TiO2anodefilm, in which the potential value increases under the positive polarization and decreases under the negative polarization. In addition, TiO2anodefilm after Li+ insertion/extraction cycles has a lower surface potential, indicating the decrease of charge sustaining capacity and the surface electrical degradation. In addition, surface potential barriers (pits) after the positive (negative) polarization have been also observed, which is mainly attributed to the different electrical properties and charge accumulation at grain boundaries.This publication has 32 references indexed in Scilit:
- In situ study of topography, phase and volume changes of titanium dioxide anode in all-solid-state thin film lithium-ion battery by biased scanning probe microscopyJournal of Power Sources, 2012
- Surface potential measurement of aged Li-ion batteries using Kelvin probe microscopyJournal of Power Sources, 2011
- Stable bipolar surface potential behavior of copper-doped zinc oxide films studied by Kelvin probe force microscopyApplied Physics Letters, 2010
- Real Space Mapping of Li-Ion Transport in Amorphous Si Anodes with Nanometer ResolutionNano Letters, 2010
- Application of SKP for in situ monitoring of ion mobility along insulator/insulator interfacesElectrochimica Acta, 2009
- Electrical characterization of locally charged oxidized nanocrystalline diamond films by Kelvin force microscopyPhysica Status Solidi (a), 2008
- Issue and challenges facing rechargeable thin film lithium batteriesMaterials Research Bulletin, 2008
- Reaction of Li with Alloy Thin Films Studied by In Situ AFMJournal of the Electrochemical Society, 2003
- Nanostructural conductivity and surface-potential study of low-field-emission carbon films with conductive scanning probe microscopyApplied Physics Letters, 1999
- Lithium insertion into host materials: the key to success for Li ion batteriesElectrochimica Acta, 1999