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Study on the Electrochemical Characteristics of a EGaIn Liquid Metal Electrode for Supercapacitor Applications
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 Title & Authors
Study on the Electrochemical Characteristics of a EGaIn Liquid Metal Electrode for Supercapacitor Applications
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Recent years, supercapacitors have been attracting a growing attention as an efficient energy storage, due to their long-lifetime, device reliability, simple device structure and operation mechanism and, most importantly, high power density. Along with the increasing interest in flexible/stretchable electronics, the supercapacitors with compatible mechanical properties have been also required. A eutectic gallium-indium (EGaIn) liquid metal could be a strong candidate as a soft electrode material of the supercapacitors because of its insulating surface oxide layer for electric double layer formation. Here, we report the electrochemical study on the charging/reaction process at the interface of EGaIn liquid metal and electrolyte. Numerical fitting of the charging current curves provides the capacitance of EGaIn/insulating layer/electrolyte (). This value is two orders of magnitude higher than a capacitance of a general metal electrode/electrolyte interface.
Eutectic Gallium-indium liquid metal;Supercapacitor;Oxide layer;Electrochemistry;Electric double-layer;
 Cited by
G. Wang, L. Zhang and J. Zhang. "A review of electrode materials for electrochemical supercapacitors", Chem. Soc. Rev., Vol. 41, No. 2, 2012, p. 797-828. crossref(new window)

Z. Weng, Y. Su, D.-W. Wang, F. Li, J. Du and H.-M. Cheng. "Graphene-Cellulose Paper Flexible Supercapacitors", Adv. Energy Mater., Vol. 1, No. 5, 2011, p. 917-922. crossref(new window)

T. Chen and L. Dai. "Flexible supercapacitors based on carbon nanomaterials", J. Mater. Chem. A, Vol. 2, No. 28, 2014, p. 10756-10775. crossref(new window)

M. F. El-Kady, V. Strong, S. Dubin and R. B. Kaner. "Laser Scribing of High-Performance and Flexible Graphene-Based Electrochemical Capacitors", Science, Vol. 335, No. 6074, 2012, p. 1326-1330. crossref(new window)

V. L. Pushparaj, M. M. Shaijumon, A. Kumar, S. Murugesan, L. Ci, R. Vajtai, R. J. Linhardt, O. Nalamasu and P. M. Ajayan. "Flexible energy storage devices based on nanocomposite paper", PNAS, Vol. 104, No. 34, 2007, p. 13574-13577. crossref(new window)

I. Shown, A. Ganguly, L.-C. Chen and K.-H. Chen. "Conducting polymer-based flexible supercapacitor", Energy Sci. Eng., Vol. 3, No. 1, 2015, p. 2-26. crossref(new window)

M. D. Dickey, R. C. Chiechi, R. J. Larsen, E. A. Weiss, D. A. Weitz and G. M. Whitesides. "Eutectic Gallium-Indium (EGaIn): A Liquid Metal Alloy for the Formation of Stable Structures in Microchannels at Room Temperature", Adv. Funct. Mater., Vol. 18, No. 7, 2008, p. 1097-1104. crossref(new window)

R. C. Chiechi, E. A. Weiss, M. D. Dickey and G. M. Whitesides. "Eutectic Gallium-Indium (EGaIn): A Moldable Liquid Metal for Electrical Characterization of Self-Assembled Monolayers", Angew. Chem. Int. Ed., Vol. 47, No. 1, 2008, p. 142-144. crossref(new window)

H.-J. Koo, J.-H. So, M. D. Dickey and O. D. Velev. "Towards All-Soft Matter Circuits: Prototypes of Quasi-Liquid Devices with Memristor Characteristics", Adv. Mater., Vol. 23, No. 31, 2011, p. 3559-3564. crossref(new window)

J.-H. So, H.-J. Koo, M. D. Dickey and O. D. Velev. "Ionic Current Rectification in Soft-Matter Diodes with Liquid-Metal Electrodes", Adv. Funct. Mater., Vol. 22, No. 3, 2012, p. 625-631. crossref(new window)

J.-H. So, J. Thelen, A. Qusba, G. J. Hayes, G. Lazzi and M. D. Dickey. "Reversibly Deformable and Mechanically Tunable Fluidic Antennas", Adv. Funct. Mater., Vol. 19, No. 22, 2009, p. 3632-3637. crossref(new window)

J.-H. So and M. D. Dickey. "Inherently aligned microfluidic electrodes composed of liquid metal", Lab Chip, Vol. 11, No. 5, 2011, p. 905-911. crossref(new window)

S. Zhu, J.-H. So, R. Mays, S. Desai, W. R. Barnes, B. Pourdeyhimi and M. D. Dickey. "Ultrastretchable Fibers with Metallic Conductivity Using a Liquid Metal Alloy Core", Adv. Funct. Mater., Vol. 23, No. 18, 2013, p. 2308-2314. crossref(new window)

E. Palleau, S. Reece, S. C. Desai, M. E. Smith and M. D. Dickey. "Self-Healing Stretchable Wires for Reconfigurable Circuit Wiring and 3D Microfluidics", Adv. Mater., Vol. 25, No. 11, 2013, p. 1589-1592. crossref(new window)

H.-J. Koo, S. T. Chang and O. D. Velev. "Ion-Current Diode with Aqueous $Gel/SiO_2$ Nanofilm Interfaces", Small, Vol. 6, No. 13, 2010, p. 1393-1397. crossref(new window)

Y. Lin, C. Cooper, M. Wang, J. J. Adams, J. Genzer and M. D. Dickey. "Handwritten, Soft Circuit Boards and Antennas Using Liquid Metal Nanoparticles", Small, Vol. 11, No. 48, 2015, p. 6397-6403. crossref(new window)

A. J. Bard and L. R. Faulkner. "Electrochemical Methods: Fundamentals and Applications". (Wiley, 2000).