Please use this identifier to cite or link to this item:
|Title:||Nano-(Cd1/3Co1/3Zn1/3)CO3: A new and high capacity anode material for Li-ion batteries|
|Citation:||Sharma, Y., Sharma, N., Rao, G.V.S., Chowdari, B.V.R. (2009-07-28). Nano-(Cd1/3Co1/3Zn1/3)CO3: A new and high capacity anode material for Li-ion batteries. Journal of Materials Chemistry 19 (28) : 5047-5054. ScholarBank@NUS Repository. https://doi.org/10.1039/b906471k|
|Abstract:||The Li-storage and cycling behavior of the mixed-metal carbonate, nano-(Cd1/3Co1/3Zn1/3)CO3 (CCZC) prepared under ambient conditions by the precipitation method are reported. A reversible capacity of 680 (±10) mAhg-1, corresponding to 3.5 moles of cyclable Li per mole of the CCZC (theor., 3.33 moles of Li) stable in the range 8-60 cycles is observed when cycled at 0.09 C in the range, 0.005-3.0 V vs. Li. The nano-CCZC also shows stable and reversible capacities at various C- rates up to 170 cycles. At 0.6 C, the observed capacity of 360 (±10) mAhg-1 is comparable to the theoretical capacity (372 mAhg -1) of the graphite used in the present-day Li- ion batteries. On the basis of galvanostatic cycling, cyclic voltammetry, ex situ-XRD, -TEM and -SAED studies, a reaction mechanism is proposed in which the CCZC is first reduced by Li to nano-metal (M = Cd, Co and Zn) particles embedded in amorphous Li 2CO3 and this is followed by the formation of alloys (Li-Zn and Li-Cd). Upon charging the electrode, the de-alloying reaction and metal carbonate (MCO3) formation occurs, thereby contributing to the reversible capacity. We have shown for the first time that the carbonate ion (CO3 2-) is as good as the oxide, fluoride or oxy-fluoride ion in enabling the reversible 'conversion' and alloying-de-alloying reactions involving both transition and non-transition metal ions. © 2009 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 Sep 20, 2018
WEB OF SCIENCETM
checked on Sep 10, 2018
checked on Jul 20, 2018
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.