N7-(carboxymethyl)guanine-Lithium Crystalline Complex: A Bioinspired Solid Electrolyte

Dutta, Dipak and Nagapradeep, N and Zhu, Haijin and Forsyth, Maria and Verma, Sandeep and Bhattacharyya, Aninda J (2016) N7-(carboxymethyl)guanine-Lithium Crystalline Complex: A Bioinspired Solid Electrolyte. In: SCIENTIFIC REPORTS, 6 .

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Abstract

Electrochemical device with components having direct significance to biological life processes is a potent futuristic strategy for the realization of all-round green and sustainable development. We present here synthesis design, structural analysis and ion transport of a novel solid organic electrolyte (G7Li), a compound reminiscent of ion channels, derived from regioisomeric N7-guanine-carboxylate conjugate and Li-ions. G7Li, with it's in-built supply of Li+-ions, exhibited remarkably high lithium-ion transference number (= 0.75) and tunable room temperature ionic conductivity spanning three decades (approximate to 10(-7) to 10(-3) Omega(-1) cm(-1)) as a function of moisture content. The ionic conductivity show a distinct reversible transition around 80-100 degrees C, from a dual Li+ and H+ (< 100 degrees C) to a pure Li+ conductor (> 100 degrees C). Systematic studies reveal a transition from water-assisted Li-ion transport to Li hopping-like mechanism involving guanine-Li coordination. While as-synthesized G7Li has potential in humidity sensors, the anhydrous G7Li is attractive for rechargeable batteries.

Item Type:	Journal Article
Publication:	SCIENTIFIC REPORTS
Additional Information:	Copy right for this article belongs to the NATURE PUBLISHING GROUP, MACMILLAN BUILDING, 4 CRINAN ST, LONDON N1 9XW, ENGLAND
Department/Centre:	Division of Chemical Sciences > Solid State & Structural Chemistry Unit
Date Deposited:	17 Feb 2017 09:19
Last Modified:	17 Feb 2017 09:19
URI:	http://eprints.iisc.ac.in/id/eprint/56263

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