银铜纳米合金薄膜作为锌空气电池的高性能阴极电催化材料。

Ag-Cu nanoalloyed film as a high-performance cathode electrocatalytic material for zinc-air battery.

作者信息

Lei Yimin, Chen Fuyi, Jin Yachao, Liu Zongwen

机构信息

State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, 127 Youyi Road, Xi'an, Shaanxi 710072 China.

School of Chemical and Biomolecular Engineering, University of Sydney, Chemical Engineering Building, Sydney, NSW 2006 Australia.

出版信息

Nanoscale Res Lett. 2015 Apr 23;10:197. doi: 10.1186/s11671-015-0900-9. eCollection 2015.

DOI:10.1186/s11671-015-0900-9

PMID:25977668

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC4411330/

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.

摘要

采用脉冲激光沉积（PLD）法制备了一种用于氧还原反应（ORR）的新型Ag50Cu50薄膜电催化剂。基于透射电子显微镜（TEM）表征，该电催化剂实际上是嵌入非晶态铜薄膜中的Ag-Cu合金纳米颗粒。旋转圆盘电极（RDE）测量结果表明，在碱性溶液中，ORR在电催化剂上通过四电子途径进行。并且它比纯银催化剂效率更高。在基于Ag50Cu50的一次锌空气电池中，当电流密度增加到100 mA cm(-2)时，催化层的最大功率密度为67 mW cm(-2)，电池电压为0.863 V时可接受。所得的可充电锌空气电池在20 mA cm(-2)时的充放电电压极化低至1.1 V，在自然空气中经过100多个循环具有高耐久性。