期刊
ACS APPLIED NANO MATERIALS
卷 5, 期 9, 页码 12496-12505出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsanm.2c01991
关键词
Zn-air batteries; energy storage; electrocatalyst; zeolitic imidazolate frameworks; carbon nanomaterials; nanoparticles
资金
- Natural Sciences and Engineering Research Council of Canada (NSERC) [RGPIN-2020-04045, RGPIN-2018-04488]
- NSERC CREATE [CREATE-463990-2015]
- University of Alberta Faculties of Science and Graduate Studies
- Alberta Innovates Strategic Projects Program
- Future Energy Systems [FES T06 P03]
CoNi nanoparticle-decorated hollow carbon cubes (CoNi-HCCs) were synthesized using ZIF-67 as a sacrificial template. These CoNi-HCCs exhibited superior performance in zinc-air batteries, including higher discharge potential, charge potential, and peak power density, as well as better cycling stability.
CoNi nanoparticle-decorated hollow carbon cubes (CoNi-HCCs) were synthesized using ZIF-67 as a sacrificial template. The synthesis utilizes the thermal instability of ZIF-67, creating hollow carbon nanostructures while facilitating carbonization and introducing metal nanoparticles (e.g., CoNi). Prototype Zn-air batteries equipped with CoNi-HCCs exhibited a promising discharge potential of 1.21 V and a charge potential of 2.04 V at 20 mA cm(-2). These values are superior to those of Pt-Ru, whose discharge and charge potentials were 1.20 and 2.08 V, respectively. CoNi-HCCs also displayed a high peak power density of 159.6 mW cm(-2), which is significantly higher than the value for Pt-Ru (120.2 mW cm(-2)). After 90 h of bifunctional cycling at 10 mA cm(-2), CoNi-HCCs only experienced an efficiency loss of 3.4% and maintained 55.3% battery efficiency, much more durable than Pt-Ru (41.7% after only 60 h).
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