Please use this identifier to cite or link to this item:
|Title:||Nano-composites SnO(VO x ) as anodes for lithium ion batteries||Authors:||Das, B.
Subba Rao, G.V.
SnO(VO x )
|Issue Date:||Feb-2011||Citation:||Das, B., Reddy, M.V., Subba Rao, G.V., Chowdari, B.V.R. (2011-02). Nano-composites SnO(VO x ) as anodes for lithium ion batteries. Journal of Solid State Electrochemistry 15 (2) : 259-268. ScholarBank@NUS Repository. https://doi.org/10.1007/s10008-010-1126-5||Abstract:||Nano-composites of SnO(V 2O 3) x (x=0, 0.25, and 0.5) and SnO(VO) 0.5 are prepared from SnO and V 2O 3/VO by high-energy ball milling (HEB) and are characterized by X-ray diffraction (XRD), scanning electron microscopy, and high-resolution transmission electron microscopy techniques. Interestingly, SnO and SnO(VO) 0.5 are unstable to HEB and disproportionate to Sn and SnO 2, whereas HEB of SnO(V 2O 3) x gives rise to SnO 2.VO x . Galvanostatic cycling of the phases is carried out at 60 mAg -1 (0.12 C) in the voltage range 0.005-0.8 V vs. Li. The nano-SnO(V 2O 3) 0.5 showed a first-charge capacity of 435(±5)mAhg -1 which stabilized to 380(±5)mAhg -1 with no noticeable fading in the range of 10-60 cycles. Under similar cycling conditions, nano-SnO (x=0), nano-SnO(V 2O 3) 0.25, and nano-SnO(VO) 0.5 showed initial reversible capacities between 630 and 390(±5)mAhg -1. Between 10 and 50 cycles, nano-SnO showed a capacity fade as high as 59%, whereas the above two VO x -containing composites showed capacity fade ranging from 10% to 28%. In all the nano-composites, the average discharge potential is 0.2-0.3 V and average charge potential is 0.5-0.6 V vs. Li, and the coulombic efficiency is 96-98% after 10 cycles. The observed galvanostatic cycling, cyclic voltammetry, and ex situ XRD data are interpreted in terms of the alloying-de-alloying reaction of Sn in the nano-composite "Sn-VO x -Li 2O" with VO x acting as an electronically conducting matrix. © 2010 Springer-Verlag.||Source Title:||Journal of Solid State Electrochemistry||URI:||http://scholarbank.nus.edu.sg/handle/10635/97288||ISSN:||14328488||DOI:||10.1007/s10008-010-1126-5|
|Appears in Collections:||Staff Publications|
Show full item record
Files in This Item:
There are no files associated with this item.
checked on Nov 17, 2019
WEB OF SCIENCETM
checked on Nov 8, 2019
checked on Nov 9, 2019
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.