Title |
Ag-Cu nanoalloyed film as a high-performance cathode electrocatalytic material for zinc-air battery
|
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Published in |
Discover Nano, April 2015
|
DOI | 10.1186/s11671-015-0900-9 |
Pubmed ID | |
Authors |
Yimin Lei, Fuyi Chen, Yachao Jin, Zongwen Liu |
Abstract |
A novel Ag50Cu50 film electrocatalyst for oxygen reduction reaction (ORR) was prepared by pulsed laser deposition (PLD) method. The electrocatalyst actually is Ag-Cu alloyed nanoparticles embedded in amorphous Cu film, based on transmission electron microscopy (TEM) characterization. The rotating disk electrode (RDE) measurements provide evidence that the ORR proceed via a four-electron pathway on the electrocatalysts in alkaline solution. And it is much more efficient than pure Ag catalyst. The catalytic layer has maximum power density of 67 mW cm(-2) and an acceptable cell voltage at 0.863 V when current densities increased up to 100 mA cm(-2) in the Ag50Cu50-based primary zinc-air battery. The resulting rechargeable zinc-air battery exhibits low charge-discharge voltage polarization of 1.1 V at 20 mAcm(-2) and high durability over 100 cycles in natural air. |
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