{"title":"采用液相沉积法将氧化钛包覆石墨毡作为钒氧化还原液流电池的负极","authors":"Chien-Sheng Huang, Jui-Yu Wang, Jung-Jie Huang","doi":"10.1007/s11581-025-06115-5","DOIUrl":null,"url":null,"abstract":"<div><p>Using a mixed solution of (NH<sub>4</sub>)<sub>2</sub>TiF<sub>6</sub> and H<sub>3</sub>BO<sub>3</sub>, this study performed liquid phase deposition (LPD) to deposit TiO<sub>2</sub> on graphite felt (GF) for application in the negative electrode of a vanadium redox flow battery (VRFB). The results revealed that LPD-TiO<sub>2</sub> uniformly coated GF, effectively transforming the original hydrophobic nature of GF into a superhydrophilic nature. After annealing at 500 ℃ in an atmospheric environment, the oxygen vacancies in the TiO<sub>2</sub> thin film were optimized, considerably enhancing its mass transfer efficiency and electrochemical activity. The VRFB comprising the LPD-TiO<sub>2</sub>/GF negative electrode achieved a coulombic efficiency, voltage efficiency, and energy efficiency of 96.2%, 71.8%, and 69.3%, respectively, at 125 mA/cm<sup>2</sup>, which were significantly superior to the corresponding efficiencies of 95.7%, 60.3%, and 57.7%, respectively, achieved by the VRFB with the acid cleaned GF. These findings demonstrate that the proposed technology has great potential for application in VRFBs.</p></div>","PeriodicalId":599,"journal":{"name":"Ionics","volume":"31 3","pages":"2539 - 2551"},"PeriodicalIF":2.4000,"publicationDate":"2025-02-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Titanium oxide covers graphite felt as negative electrode for vanadium redox flow battery by liquid phase deposition\",\"authors\":\"Chien-Sheng Huang, Jui-Yu Wang, Jung-Jie Huang\",\"doi\":\"10.1007/s11581-025-06115-5\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>Using a mixed solution of (NH<sub>4</sub>)<sub>2</sub>TiF<sub>6</sub> and H<sub>3</sub>BO<sub>3</sub>, this study performed liquid phase deposition (LPD) to deposit TiO<sub>2</sub> on graphite felt (GF) for application in the negative electrode of a vanadium redox flow battery (VRFB). The results revealed that LPD-TiO<sub>2</sub> uniformly coated GF, effectively transforming the original hydrophobic nature of GF into a superhydrophilic nature. After annealing at 500 ℃ in an atmospheric environment, the oxygen vacancies in the TiO<sub>2</sub> thin film were optimized, considerably enhancing its mass transfer efficiency and electrochemical activity. The VRFB comprising the LPD-TiO<sub>2</sub>/GF negative electrode achieved a coulombic efficiency, voltage efficiency, and energy efficiency of 96.2%, 71.8%, and 69.3%, respectively, at 125 mA/cm<sup>2</sup>, which were significantly superior to the corresponding efficiencies of 95.7%, 60.3%, and 57.7%, respectively, achieved by the VRFB with the acid cleaned GF. These findings demonstrate that the proposed technology has great potential for application in VRFBs.</p></div>\",\"PeriodicalId\":599,\"journal\":{\"name\":\"Ionics\",\"volume\":\"31 3\",\"pages\":\"2539 - 2551\"},\"PeriodicalIF\":2.4000,\"publicationDate\":\"2025-02-03\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Ionics\",\"FirstCategoryId\":\"92\",\"ListUrlMain\":\"https://link.springer.com/article/10.1007/s11581-025-06115-5\",\"RegionNum\":4,\"RegionCategory\":\"化学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q3\",\"JCRName\":\"CHEMISTRY, PHYSICAL\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Ionics","FirstCategoryId":"92","ListUrlMain":"https://link.springer.com/article/10.1007/s11581-025-06115-5","RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}
Titanium oxide covers graphite felt as negative electrode for vanadium redox flow battery by liquid phase deposition
Using a mixed solution of (NH4)2TiF6 and H3BO3, this study performed liquid phase deposition (LPD) to deposit TiO2 on graphite felt (GF) for application in the negative electrode of a vanadium redox flow battery (VRFB). The results revealed that LPD-TiO2 uniformly coated GF, effectively transforming the original hydrophobic nature of GF into a superhydrophilic nature. After annealing at 500 ℃ in an atmospheric environment, the oxygen vacancies in the TiO2 thin film were optimized, considerably enhancing its mass transfer efficiency and electrochemical activity. The VRFB comprising the LPD-TiO2/GF negative electrode achieved a coulombic efficiency, voltage efficiency, and energy efficiency of 96.2%, 71.8%, and 69.3%, respectively, at 125 mA/cm2, which were significantly superior to the corresponding efficiencies of 95.7%, 60.3%, and 57.7%, respectively, achieved by the VRFB with the acid cleaned GF. These findings demonstrate that the proposed technology has great potential for application in VRFBs.
期刊介绍：
Ionics is publishing original results in the fields of science and technology of ionic motion. This includes theoretical, experimental and practical work on electrolytes, electrode, ionic/electronic interfaces, ionic transport aspects of corrosion, galvanic cells, e.g. for thermodynamic and kinetic studies, batteries, fuel cells, sensors and electrochromics. Fast solid ionic conductors are presently providing new opportunities in view of several advantages, in addition to conventional liquid electrolytes.
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