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Including Liquid Metal into Porous Elastomeric Films for Flexible and Enzyme-Free Glucose Fuel Cells: A Preliminary Evaluation
Denis Desmaële, Francesco La Malfa, Francesco Rizzi, Antonio Qualtieri, Massimo De Vittorio
Istituto Italiano di Tecnologia (IIT), Center for Biomolecular Nanotechnologies, Via Barsanti, 73010 Arnesano, Italy

Published: 22 November 2018 by MDPI in Journal of Low Power Electronics and Applications
MDPI, Volume 8; 10.3390/jlpea8040045
Abstract: This communication introduces a new flexible elastomeric composite film, which can directly convert the chemical energy of glucose into electricity. The fabrication process is simple, and no specific equipment is required. Notably, the liquid metal Galinstan is exploited with a two-fold objective: (i) Galinstan particles are mixed with polydimethylsiloxane to obtain a highly conductive porous thick film scaffold; (ii) the presence of Galinstan in the composite film enables the direct growth of highly catalytic gold structures. As a first proof of concept, we demonstrate that when immersed in a 20 mM glucose solution, a 5 mm-long, 5 mm-wide and 2 mm-thick sample can generate a volumetric power density up to 3.6 mW·cm−3 at 7 mA·cm−3 and 0.51 V without using any enzymes.
Keywords: Galinstan, enzyme-free, Liquid metal, Porous Gold, Glucose Fuel Cell
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