Publisher : The Korean Hydrogen and New Energy Society
DOI : 10.7316/KHNES.2016.27.2.176
Title & Authors
Study on the Electrochemical Characteristics of a EGaIn Liquid Metal Electrode for Supercapacitor Applications SO, JU-HEE; KOO, HYUNG-JUN;
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.
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