2010
DOI: 10.1126/science.1195628
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In Situ Observation of the Electrochemical Lithiation of a Single SnO 2 Nanowire Electrode

Abstract: We report the creation of a nanoscale electrochemical device inside a transmission electron microscope--consisting of a single tin dioxide (SnO(2)) nanowire anode, an ionic liquid electrolyte, and a bulk lithium cobalt dioxide (LiCoO(2)) cathode--and the in situ observation of the lithiation of the SnO(2) nanowire during electrochemical charging. Upon charging, a reaction front propagated progressively along the nanowire, causing the nanowire to swell, elongate, and spiral. The reaction front is a "Medusa zone… Show more

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Cited by 1,495 publications
(1,219 citation statements)
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References 34 publications
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“…In recent years, the in situ TEM electrochemical testing technique has been used to probe structural variations of nanoscale electrode materials with high spatial resolution during discharge/charge 36, 37, 38, 39, 40, 41, 42, 43, 44, 45. We also constructed an electrochemical nanodevice using an Fe‐S@CNT as a working electrode for an in situ TEM experiment to examine its structural changes and to obtain direct insight into its Li‐storage mechanism.…”
Section: Resultsmentioning
confidence: 99%
“…In recent years, the in situ TEM electrochemical testing technique has been used to probe structural variations of nanoscale electrode materials with high spatial resolution during discharge/charge 36, 37, 38, 39, 40, 41, 42, 43, 44, 45. We also constructed an electrochemical nanodevice using an Fe‐S@CNT as a working electrode for an in situ TEM experiment to examine its structural changes and to obtain direct insight into its Li‐storage mechanism.…”
Section: Resultsmentioning
confidence: 99%
“…32,33 Here, we use this in situ TEM technique to observe the deformation and structural changes during lithiation of the Si@void@C material to gain insight into the volume change process. The in situ electrochemical cell is shown schematically in Figure 3A.…”
mentioning
confidence: 99%
“…The in situ experiments described above confirmed that the nanowire consisted of nanocrystalline Li x Sn and Sn dispersed in an amorphous Li 2 O matrix. The nanowire underwent dynamic structural evolution after charging, as can be seen in Figure 13 A–E and H 147, 151. Further, detailed observation of the microstructural evolution of electrodes has provided direct evidence regarding the spatial relationship between newly formed Li 2 O and Li x Sn 151.…”
Section: Multi‐electron Reactions In Libs and Nibsmentioning
confidence: 85%