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Title: Direct observation of lithium-ion transport under an electrical field in Lix CoO2 nanograins
Authors: Zhu, X.
Ong, C.S. 
Xu, X.
Hu, B.
Shang, J.
Yang, H.
Katlakunta, S.
Liu, Y.
Chen, X.
Pan, L.
Ding, J. 
Li, R.-W.
Issue Date: 2013
Citation: Zhu, X., Ong, C.S., Xu, X., Hu, B., Shang, J., Yang, H., Katlakunta, S., Liu, Y., Chen, X., Pan, L., Ding, J., Li, R.-W. (2013). Direct observation of lithium-ion transport under an electrical field in Lix CoO2 nanograins. Scientific Reports 3 : -. ScholarBank@NUS Repository.
Abstract: The past decades have witnessed the development of many technologies based on nanoionics, especially lithium-ion batteries (LIBs). Now there is an urgent need for developing LIBs with good high-rate capability and high power. LIBs with nanostructured electrodes show great potentials for achieving such goals. However, the nature of Li-ion transport behaviors within the nanostructured electrodes is not well clarified yet. Here, Li-ion transport behaviors in Lix CoO2 nanograins are investigated by employing conductive atomic force microscopy (C-AFM) technique to study the local Li-ion diffusion induced conductance change behaviors with a spatial resolution of ∼10 nm. It is found that grain boundary has a low Li-ion diffusion energy barrier and provides a fast Li-ion diffusion pathway, which is also confirmed by our first principles calculation. This information provides important guidelines for designing high performance LIBs from a point view of optimizing the electrode material microstructures and the development of nanoionics.
Source Title: Scientific Reports
ISSN: 20452322
DOI: 10.1038/srep01084
Appears in Collections:Staff Publications

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