Seon-Ho Lee , Seong Hyeon Woo , Beom Jun Pak , Sungmin Kim , Yun Sik Kang , Seunghee Woo , Seok-Hee Park , Tae-Hyun Yang , Sung-Dae Yim
{"title":"Ink droplet drying analysis for understanding the ink-catalyst layer transition in proton exchange membrane fuel cells","authors":"Seon-Ho Lee , Seong Hyeon Woo , Beom Jun Pak , Sungmin Kim , Yun Sik Kang , Seunghee Woo , Seok-Hee Park , Tae-Hyun Yang , Sung-Dae Yim","doi":"10.1016/j.jpowsour.2023.233644","DOIUrl":null,"url":null,"abstract":"<div><p><span><span>There is still limited understanding of ink structure and the transition process from ink to the catalyst layer (CL) in proton exchange membrane fuel cells despite recent interest in the field. This study proposes a methodology for analyzing the CLs formed after drying single- and multi-ink droplets produced using an ultrasonic </span>spray<span>. Two model inks, Pt/Vulcan Carbon and Pt/Ketjen Black, are prepared using these catalysts, and their characteristics are analyzed through sedimentation behavior, ionomer<span> adsorption quantification, and rheology. The structural properties of the spray-dried CLs are examined using scanning electron microscopy, energy-dispersive X-ray spectroscopy, and scanning electron microscopy-Auger electron spectroscopy. These analyses reveal distinct differences in the CLs' structures, influenced by physical phenomena such as coffee ring formation and droplet coalescence, which are dependent on the ink properties. Furthermore, the structural characteristics of the CLs produced by the two model inks affect the electrochemical behavior of the 25 cm</span></span></span><sup>2</sup><span> fuel cell. This study establishes a correlation between the ink structure, CL structure, and fuel cell performance, emphasizing the usefulness of the ultrasonic spray coating method in advancing such investigations.</span></p></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":null,"pages":null},"PeriodicalIF":8.1000,"publicationDate":"2023-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Power Sources","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0378775323010200","RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}
引用次数: 0
Abstract
There is still limited understanding of ink structure and the transition process from ink to the catalyst layer (CL) in proton exchange membrane fuel cells despite recent interest in the field. This study proposes a methodology for analyzing the CLs formed after drying single- and multi-ink droplets produced using an ultrasonic spray. Two model inks, Pt/Vulcan Carbon and Pt/Ketjen Black, are prepared using these catalysts, and their characteristics are analyzed through sedimentation behavior, ionomer adsorption quantification, and rheology. The structural properties of the spray-dried CLs are examined using scanning electron microscopy, energy-dispersive X-ray spectroscopy, and scanning electron microscopy-Auger electron spectroscopy. These analyses reveal distinct differences in the CLs' structures, influenced by physical phenomena such as coffee ring formation and droplet coalescence, which are dependent on the ink properties. Furthermore, the structural characteristics of the CLs produced by the two model inks affect the electrochemical behavior of the 25 cm2 fuel cell. This study establishes a correlation between the ink structure, CL structure, and fuel cell performance, emphasizing the usefulness of the ultrasonic spray coating method in advancing such investigations.
期刊介绍:
The Journal of Power Sources is a publication catering to researchers and technologists interested in various aspects of the science, technology, and applications of electrochemical power sources. It covers original research and reviews on primary and secondary batteries, fuel cells, supercapacitors, and photo-electrochemical cells.
Topics considered include the research, development and applications of nanomaterials and novel componentry for these devices. Examples of applications of these electrochemical power sources include:
• Portable electronics
• Electric and Hybrid Electric Vehicles
• Uninterruptible Power Supply (UPS) systems
• Storage of renewable energy
• Satellites and deep space probes
• Boats and ships, drones and aircrafts
• Wearable energy storage systems