A study on the interior microstructures of working Sn particle electrode of Li-ion batteries by in situ X-ray transmission microscopy
Journal
Electrochemistry Communications
Journal Volume
12
Journal Issue
2
Pages
234-237
Date Issued
2010
Author(s)
Abstract
The interior microstructures of Sn particles developed during electrochemical lithiation/de-lithiation have been revealed by in situ X-ray transmission microscopy (TXM). The Li-alloying particles exhibited the formation of core-shell internal structure along with crack formation within the lithiated zone during the first lithiation. The extent and speed of the expansion process was shown to be a strong function of particle size. Upon completion of the first de-lithiaiton, the particles only partially (?10%) contracted, while re-crystallization of Sn continued to take place within the interior of the particles during a following idle period. The re-crystallization process alleviated the pulverization problem and led to the formation of porous Sn particles, which exhibited remarkably attenuated dimensional variations during subsequent cycles. ? 2009 Elsevier B.V. All rights reserved.
Subjects
Alloying anode
Li-ion battery
Tin
Transmission X-ray microscopy
SDGs
Type
journal article