Chuyi Zhao, Lei Tan, Jingsan Xu, Xiaotong Wu, Yuanyuan Cui, Chao Lin, Xiaopeng Li, Teng Long, Wei Luo
{"title":"通过增强介孔碳纳米纤维的介观质量输运优化氧还原反应","authors":"Chuyi Zhao, Lei Tan, Jingsan Xu, Xiaotong Wu, Yuanyuan Cui, Chao Lin, Xiaopeng Li, Teng Long, Wei Luo","doi":"10.1007/s42765-024-00503-8","DOIUrl":null,"url":null,"abstract":"<div><p>Precious metal-free electrocatalysts often require significantly more loadings to achieve similar performance as Pt does in fuel cells and metal air batteries. The high loadings cause substantial mass transportation resistance. To address this challenge, we synthesized ordered mesoporous carbon nanofiber electrocatalyst that enables unimpeded mass transfer at mesoscale. The synthesis was based on electrospinning of supramolecular micelles, which were stretched under hydrodynamic forces and self-assembled as in oriented and ordered form. Ordered mesoporous carbon nanofibers (OMCNFs) were obtained after removing the micelle template. The aligned mesopores over electrode scale strongly accelerate diffusion kinetics. The OH<sup>−</sup> ion diffusion coefficient of OMCNF is 26 times larger than that of the nanofiber with non-ordered pores (NMCNF) and 206 times larger than that of Pt/C. As a result, the electrocatalytic performance of OMCNF was maintained at increased catalyst loadings, while performance deterioration was observed in NMCNF and Pt/C. The assembled zinc-air batteries using aqueous electrolyte and solid-state electrolyte delivered high power density and nice cycling performance.</p><h3>Graphical Abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":459,"journal":{"name":"Advanced Fiber Materials","volume":"7 2","pages":"554 - 562"},"PeriodicalIF":17.2000,"publicationDate":"2024-12-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Optimizing Oxygen Reduction Reaction through Enhanced Mesoscopic Mass Transport in Ordered Mesoporous Carbon Nanofibers\",\"authors\":\"Chuyi Zhao, Lei Tan, Jingsan Xu, Xiaotong Wu, Yuanyuan Cui, Chao Lin, Xiaopeng Li, Teng Long, Wei Luo\",\"doi\":\"10.1007/s42765-024-00503-8\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>Precious metal-free electrocatalysts often require significantly more loadings to achieve similar performance as Pt does in fuel cells and metal air batteries. The high loadings cause substantial mass transportation resistance. To address this challenge, we synthesized ordered mesoporous carbon nanofiber electrocatalyst that enables unimpeded mass transfer at mesoscale. The synthesis was based on electrospinning of supramolecular micelles, which were stretched under hydrodynamic forces and self-assembled as in oriented and ordered form. Ordered mesoporous carbon nanofibers (OMCNFs) were obtained after removing the micelle template. The aligned mesopores over electrode scale strongly accelerate diffusion kinetics. The OH<sup>−</sup> ion diffusion coefficient of OMCNF is 26 times larger than that of the nanofiber with non-ordered pores (NMCNF) and 206 times larger than that of Pt/C. As a result, the electrocatalytic performance of OMCNF was maintained at increased catalyst loadings, while performance deterioration was observed in NMCNF and Pt/C. The assembled zinc-air batteries using aqueous electrolyte and solid-state electrolyte delivered high power density and nice cycling performance.</p><h3>Graphical Abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>\",\"PeriodicalId\":459,\"journal\":{\"name\":\"Advanced Fiber Materials\",\"volume\":\"7 2\",\"pages\":\"554 - 562\"},\"PeriodicalIF\":17.2000,\"publicationDate\":\"2024-12-05\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Advanced Fiber Materials\",\"FirstCategoryId\":\"88\",\"ListUrlMain\":\"https://link.springer.com/article/10.1007/s42765-024-00503-8\",\"RegionNum\":1,\"RegionCategory\":\"工程技术\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"MATERIALS SCIENCE, MULTIDISCIPLINARY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Advanced Fiber Materials","FirstCategoryId":"88","ListUrlMain":"https://link.springer.com/article/10.1007/s42765-024-00503-8","RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"MATERIALS SCIENCE, MULTIDISCIPLINARY","Score":null,"Total":0}
Optimizing Oxygen Reduction Reaction through Enhanced Mesoscopic Mass Transport in Ordered Mesoporous Carbon Nanofibers
Precious metal-free electrocatalysts often require significantly more loadings to achieve similar performance as Pt does in fuel cells and metal air batteries. The high loadings cause substantial mass transportation resistance. To address this challenge, we synthesized ordered mesoporous carbon nanofiber electrocatalyst that enables unimpeded mass transfer at mesoscale. The synthesis was based on electrospinning of supramolecular micelles, which were stretched under hydrodynamic forces and self-assembled as in oriented and ordered form. Ordered mesoporous carbon nanofibers (OMCNFs) were obtained after removing the micelle template. The aligned mesopores over electrode scale strongly accelerate diffusion kinetics. The OH− ion diffusion coefficient of OMCNF is 26 times larger than that of the nanofiber with non-ordered pores (NMCNF) and 206 times larger than that of Pt/C. As a result, the electrocatalytic performance of OMCNF was maintained at increased catalyst loadings, while performance deterioration was observed in NMCNF and Pt/C. The assembled zinc-air batteries using aqueous electrolyte and solid-state electrolyte delivered high power density and nice cycling performance.
期刊介绍：
Advanced Fiber Materials is a hybrid, peer-reviewed, international and interdisciplinary research journal which aims to publish the most important papers in fibers and fiber-related devices as well as their applications.Indexed by SCIE, EI, Scopus et al.
Publishing on fiber or fiber-related materials, technology, engineering and application.
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