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

作者：Dutta Dipak; Nagapradeep N; Zhu Haijin; Forsyth Maria; Verma Sandeep^*; Bhattacharyya Aninda J^*

来源：Scientific Reports, 2016, 6(1): 24499.

DOI：10.1038/srep24499

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.

• 出版日期2016-4-19
• 单位迪肯大学