Pengcheng Liu , Daijun Yang , Bing Li , Jialun Kang , Cunman Zhang , Pingwen Ming , Xiangmin Pan , Hengzhi Liu
{"title":"苯甲酸作为添加剂:抑制质子交换膜燃料电池催化剂层裂缝形成的途径","authors":"Pengcheng Liu , Daijun Yang , Bing Li , Jialun Kang , Cunman Zhang , Pingwen Ming , Xiangmin Pan , Hengzhi Liu","doi":"10.1016/j.jpowsour.2023.233817","DOIUrl":null,"url":null,"abstract":"<div><p><span><span><span><span>Cracks are a common defect in the catalyst layers (CLs) of proton exchange membrane fuel cells (PEMFCs), deteriorating their performance. This study proposes </span>benzoic acid as a cracking inhibitor in the catalyst ink. The additive strengthens the network of </span>catalyst particles<span><span> by promoting attractive interaction within them. Molecular dynamics simulations demonstrate that the inhibitor facilitates the desorption of </span>ionomer<span> from the Pt/carbon surface, weakening the repulsion force within catalyst particles. Rheology experiments indicate that the addition of benzoic acid transforms the catalyst ink from a sol-like to a gel-like, improving its viscosity and storage modulus. The stronger attractive interactions within the inhibitor-added ink impart anti-cracking ability, preventing stress release during the drying process. Furthermore, </span></span></span>optical microscopy<span> reveals a significant decrease in both the crack area and the maximum length of cracks in the CL after incorporating the inhibitor. Specifically, the crack area decreases from 13% to 2%, while the maximum crack length decreases from nearly 400 μm to 150 μm. Single cell tests show that the inhibitor-added sample exhibits a higher peak power density of 0.893 W/cm</span></span><sup>2</sup> compared to the standard sample's 0.873 W/cm<sup>2</sup>. Overall, this study presents an effective method for manufacturing high-quality CLs in PEMFCs, ensuring improved performance.</p></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":null,"pages":null},"PeriodicalIF":8.1000,"publicationDate":"2023-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Benzoic acid as additive: A route to inhibit the formation of cracks in catalyst layer of proton exchange membrane fuel cells\",\"authors\":\"Pengcheng Liu , Daijun Yang , Bing Li , Jialun Kang , Cunman Zhang , Pingwen Ming , Xiangmin Pan , Hengzhi Liu\",\"doi\":\"10.1016/j.jpowsour.2023.233817\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p><span><span><span><span>Cracks are a common defect in the catalyst layers (CLs) of proton exchange membrane fuel cells (PEMFCs), deteriorating their performance. This study proposes </span>benzoic acid as a cracking inhibitor in the catalyst ink. The additive strengthens the network of </span>catalyst particles<span><span> by promoting attractive interaction within them. Molecular dynamics simulations demonstrate that the inhibitor facilitates the desorption of </span>ionomer<span> from the Pt/carbon surface, weakening the repulsion force within catalyst particles. Rheology experiments indicate that the addition of benzoic acid transforms the catalyst ink from a sol-like to a gel-like, improving its viscosity and storage modulus. The stronger attractive interactions within the inhibitor-added ink impart anti-cracking ability, preventing stress release during the drying process. Furthermore, </span></span></span>optical microscopy<span> reveals a significant decrease in both the crack area and the maximum length of cracks in the CL after incorporating the inhibitor. Specifically, the crack area decreases from 13% to 2%, while the maximum crack length decreases from nearly 400 μm to 150 μm. Single cell tests show that the inhibitor-added sample exhibits a higher peak power density of 0.893 W/cm</span></span><sup>2</sup> compared to the standard sample's 0.873 W/cm<sup>2</sup>. Overall, this study presents an effective method for manufacturing high-quality CLs in PEMFCs, ensuring improved performance.</p></div>\",\"PeriodicalId\":377,\"journal\":{\"name\":\"Journal of Power Sources\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":8.1000,\"publicationDate\":\"2023-11-15\",\"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/S037877532301193X\",\"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}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Power Sources","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S037877532301193X","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}
Benzoic acid as additive: A route to inhibit the formation of cracks in catalyst layer of proton exchange membrane fuel cells
Cracks are a common defect in the catalyst layers (CLs) of proton exchange membrane fuel cells (PEMFCs), deteriorating their performance. This study proposes benzoic acid as a cracking inhibitor in the catalyst ink. The additive strengthens the network of catalyst particles by promoting attractive interaction within them. Molecular dynamics simulations demonstrate that the inhibitor facilitates the desorption of ionomer from the Pt/carbon surface, weakening the repulsion force within catalyst particles. Rheology experiments indicate that the addition of benzoic acid transforms the catalyst ink from a sol-like to a gel-like, improving its viscosity and storage modulus. The stronger attractive interactions within the inhibitor-added ink impart anti-cracking ability, preventing stress release during the drying process. Furthermore, optical microscopy reveals a significant decrease in both the crack area and the maximum length of cracks in the CL after incorporating the inhibitor. Specifically, the crack area decreases from 13% to 2%, while the maximum crack length decreases from nearly 400 μm to 150 μm. Single cell tests show that the inhibitor-added sample exhibits a higher peak power density of 0.893 W/cm2 compared to the standard sample's 0.873 W/cm2. Overall, this study presents an effective method for manufacturing high-quality CLs in PEMFCs, ensuring improved performance.
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