Please use this identifier to cite or link to this item:
|Title:||Nano-(V1/2Sb1/2Sn)O4: A high capacity, high rate anode material for Li-ion batteries|
|Authors:||Reddy, M.V. |
Subba Rao, G.V.
|Source:||Reddy, M.V., Subba Rao, G.V., Chowdari, B.V.R. (2011-07-21). Nano-(V1/2Sb1/2Sn)O4: A high capacity, high rate anode material for Li-ion batteries. Journal of Materials Chemistry 21 (27) : 10003-10011. ScholarBank@NUS Repository. https://doi.org/10.1039/c0jm04140h|
|Abstract:||Vanadium antimony tin oxide, M (micron size)-(V1/2Sb 1/2Sn)O4 with tetragonal rutile structure is prepared for the first time. The N (nanosize, 10-20 nm)-analogue is obtained by high energy ball milling of the above. They are characterized by Rietveld refinement of the X-ray diffraction data, high resolution transmission electron microscopy (HR-TEM), selected area electron diffraction (SAED), density and BET surface area studies. The Li-cycling properties were studied at ambient temperature (24 °C) and at 54 °C by galvanostatic discharge-charge cycling and cyclic voltammetry. Nano-(V1/2Sb1/2Sn)O4 shows stable cycling performance at 24 °C with capacities 450, 435 and 360 (±5) mA h g-1 at rates of 0.43, 1.0 and 3.5 C, respectively, in the range, 0.005-1.0 V vs. Li. These values are stable up to 100 cycles at 0.43 C and up to at least 50 cycles at 1 C and 3.5 C. At 54 °C and at 0.43 C, N-(V 1/2Sb1/2Sn)O4 delivers a stable capacity of 440 (±5) mA h g-1 in the range, 5-100 cycles. Under similar conditions the cycling performance of M-(V1/2Sb1/2Sn) O4 is inferior to that of the N-analogue. The M- and N-(V 1/2Sb1/2Sn)O4 showed main cathodic and anodic peaks at ∼0.2 V and ∼0.5 V, respectively, by CV. Complementary impedance studies are reported at various voltages and as a function of cycle number to support the Li-cycling mechanism involving alloying-de-alloying reactions of Sn and Sb with Li using (VO) as an inert matrix. © 2010 The Royal Society of Chemistry.|
|Source Title:||Journal of Materials Chemistry|
|Appears in Collections:||Staff Publications|
Show full item record
Files in This Item:
There are no files associated with this item.
checked on Feb 21, 2018
WEB OF SCIENCETM
checked on Jan 8, 2018
checked on Feb 18, 2018
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.