Direct Realization of Complete Conversion and Agglomeration Dynamics of SnO2 Nanoparticles in Liquid Electrolyte

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The conversion reaction is important in lithium-ion batteries because it governs the overall battery performance, such as initial Coulombic efficiency, capacity retention, and rate capability. Here, we have demonstrated in situ observation of the complete conversion reaction and agglomeration of nanoparticles (NPs) upon lithiation by using graphene liquid cell transmission electron microscopy. The observation reveals that the Sn NPs are nucleated from the surface of SnO2, followed by merging with each other. We demonstrate that the agglomeration has a stepwise process, including rotation of a NP, formation of necks, and subsequent merging of individual NPs.
Publisher
AMER CHEMICAL SOC
Issue Date
2017-10
Language
English
Article Type
Article
Citation

ACS OMEGA, v.2, no.10, pp.6329 - 6336

ISSN
2470-1343
DOI
10.1021/acsomega.7b01046
URI
http://hdl.handle.net/10203/240052
Appears in Collection
MS-Journal Papers(저널논문)
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