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

Dipak Dutta, N. Nagapradeep, Haijin Zhu, Maria Forsyth, Sandeep Verma*, Aninda J. Bhattacharyya

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

6 Scopus citations


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 (≈10-7 to 10-3 Ω-1 cm-1) as a function of moisture content. The ionic conductivity show a distinct reversible transition around 80-100 °C, from a dual Li+ and H+ (<100 °C) to a pure Li+ conductor (>100 °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.

Original languageEnglish
Article number24499
JournalScientific Reports
StatePublished - 19 Apr 2016
Externally publishedYes


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