Journal
CHEMICAL ENGINEERING JOURNAL
Volume 399, Issue -, Pages -Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2020.125075
Keywords
Copper nanowires; Flexible transparent electrodes; High stability; Electrodeposition
Categories
Funding
- National Natural Science Foundation of China [51522503]
- Program for New Century Excellent Talents in University [NCET-13-0175]
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Copper nanowire (CuNW) is one of the most promising materials for next-generation flexible transparent electrodes (FTEs). Currently, large-scale applications of CuNW in FTEs are still hindered by their poor resistance against oxidation, chemical, and electrochemical corrosion. Previous studies mainly focused on solving a single problem, which can hardly overcome these problems simultaneously. Hence, CuNW@alloy core shell network was developed to address these issues concurrently. It was fabricated by co-electrodepositing Ag-Au alloy layer onto CuNW network through the induction of cyanide in the electrolyte. Compared with pristine CuNW network that the electrical resistance increases a magnitude after storing in atmospheric environment for 12 h, the CuNW@alloy network is still stable after 168 h. The conductivity of CuNW@alloy network almost unchanged after 200 s H2O2 corrosion, while the pristine CuNW network loses conductivity quickly within 30 s. Furthermore, CuNW@alloy network keeps intact after anode oxidation in 1 mol/L H2SO4 solution for 1800 s, but the pristine CuNW nearly dissolves less than 10 s. In addition to high stability, excellent optoelectrical performance (14.2 Ohm/sq at a transmittance of 90.1%) and mechanical flexibility (remaining stable after 2000 bending cycles) is also obtained. Based on these advantages, a primary bifunctional device with electrochromic and supercapacitor performance is fabricated by electrochemical polymerizing polyaniline layer onto advanced CuNW@alloy FTEs, which can change colour with different input voltages and store energy simultaneously, demonstrating its potential in next multifunctional flexible electronics.
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