Saravanan, K. and Kalaiselvi, N. (2017) Reaping the redox switching capability of vanadium in Li3V2(PO4)3/ HHC composite to demonstrate the rocking chair electrode performance. Journal of Power Sources, 366. pp. 207-217. ISSN 0378-7753

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Abstract

The study exploits the functional advantages of vanadium with variable oxidation states to extract maximum energy from Li3V2(PO4)3/HHC composite containing human hair derived carbon. Vanadium, present in the form of V3þ in Li3V2(PO4)3 stabilizes itself electrochemically as V4þ by forming LiV2(PO4)3 through oxidation in the potential range 3.0e4.5 V and as V1þ by forming Li7V2(PO4)3 due to the reduction of V3þ into V1þ in the 0.01e3.0 V region, thus qualifying LVP as a rocking chair electrode. In other words, Li3V2(PO4)3/HHC composite demonstrates itself as anode and as cathode for lithium-ion batteries. Li3V2(PO4)3/HHC cathode exhibits ultra high capacity, excellent rate capability at 50C and retains about 99% capacity up to 1000 cycles. As anode, Li3V2(PO4)3/HHC delivers a capacity of 428 mAh g�1 at 50 mA g�1 and tolerates 5 A g�1 condition up to 1000 cycles with a negligible capacity fade. The dual electrode behavior of Li3V2(PO4)3/HHC may be attributed to the unique architecture of HHC that provides high electronic conductivity, facilitates rapid diffusion of lithium ions and admits volume changes during intercalation/deintercalation. More importantly, HHC is a cheap and eco-friendly carbon additive derived from filthy human hair, which in turn offers ample scope for the commercial exploitation of title electrode.

Item Type:	Article
Uncontrolled Keywords:	Li3V2(PO4)3;Human hair derived carbon;Lithium batteries;Anode;Cathode;Rocking chair electrode
Subjects:	Electrochemical Power Sources
Divisions:	UNSPECIFIED
Depositing User:	Dr. N Meyyappan
Date Deposited:	07 May 2019 09:02
Last Modified:	07 May 2019 09:02
URI:	http://cecri.csircentral.net/id/eprint/3216

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