Highly Stretchable and Transparent Supercapacitor by Ag-Au Core-Shell Nanowire Network with High Electrochemical Stability

Stretchable and transparent electronics have steadily attracted huge attention in wearable devices. Although Ag nanowire is the one of the most promising candidates for transparent and stretchable electronics, its electrochemical instability has forbidden its application to the development of electrochemical energy devices such as supercapacitors. Here, we introduce a highly stretchable and transparent super capacitor based on electrochemically stable Ag Au core shell nanowire percolation network electrode. We developed a simple solution process to synthesize the Ag Au core shell nanowire with excellent electrical conductivity as well as greatly enhanced chemical and electrochemical stabilities compared to pristine Ag nanowire. The proposed core shell nanowirebased supercapacitor still possesses fine optical transmittance and outstanding mechanical stability up to 60% strain. The Ag Au core shell nanowire can be a strong candidate for future wearable electrochemical energy devices.This work is supported by National Research Foundation of Korea (Grant No. 2012-0008779) Global Frontier R&D Program on Center for Multiscale Energy System (Grant No. 2012-054172), Nano-Material Technology Development Program (R2011-003-2009), Creative Materials Discovery Program (NRF-2016M3D1A1900035) funded by the Ministry of Science, ICT & Future, and the R&D Convergence Program, and by Seoul National University, Institute of Advanced Machinery and Design