阴极
电化学
化学工程
钇
碳纤维
氟化物
电解质
锌
兴奋剂
作者
Wei Wang,Yajun Mi,Yumao Kang,Xianyi Liu,Sarah Imhanria,Ziqiang Lei
标识
DOI:10.1016/j.jpowsour.2020.228451
摘要
Abstract Recently, advanced nitrogen-containing carbon materials create a huge opportunity for developing efficient catalysts, and show great potential in zinc-air batteries (ZABs). In this study, YF3 doped nitrogen-containing carbon (YF3@NC) electrocatalyst is prepared using m-phenylenediamine as nitrogen and carbon sources. Yttrium chloride, ammonium fluoride and l -arginine are used as Y source, F source and assistant, respectively. Spherical YF3 precursor is obtained through a facile arginine-assisted hydrothermal method, which is then coated with nitrogen-containing carbon and pyrolyzed at high temperature to fabricate YF3@NC. It exhibits a positive onset potential (0.943 V), half-wave potential (0.836 V), high current density and good cycling stability (10 h degradation: 13%). When YF3@NC is applied as air cathode electrode in ZABs, the obtained battery has a high open circuit potential (1.478 V) and peak power density (75 mW cm−2). This approach makes YF3@NC to be a promising candidate as cathode catalyst in ZABs in the future.
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