Dan Wu, Niuniu Zhang, Weimin Gao, Qingquan Li, Xinna Gao, Shuang Wang, Quantong Che
{"title":"通过季铵化共价有机框架掺杂电纺丝二元聚合物加速氢氧根离子传导的新型阴离子交换膜","authors":"Dan Wu, Niuniu Zhang, Weimin Gao, Qingquan Li, Xinna Gao, Shuang Wang, Quantong Che","doi":"10.1039/d4ta04614e","DOIUrl":null,"url":null,"abstract":"The mutual restriction between hydroxide ions conductivity and alkaline stability is the main obstacle for the practical application of anion exchange membranes (AEMs) in anion exchange membrane fuel cells. In this research, we design a binary polymer nanofibers of polyvinylidene fluoride (PVDF) and polystyrene-block-poly(ethylene-ran-butylene)-block-polystyrene (SEBS) through the electrospinning technique. A quaternized covalent organic framework (QACOF) is synthesized to accelerate the hydroxide ions conduction though consisting of successive and hydrophilic hydroxide ions conduction channels based on the quaternary ammonium groups. Additionally, the ordered microchannel structures of QACOF can further accelerate the hydroxide ions conduction process. The novel AEMs are thus constructed via re-stacking of PVDF-SEBS binary polymer nanofibers with the designed QACOF. The QACOF can be closely adhered to PVDF-SEBS binary polymer nanofibers even if the PVDF-SEBS/1%QACOF membrane was immersed in 2 M of KOH solution for 480 h. As a result, the single fuel cell equipped with the PVDF-SEBS/1%QACOF membrane exhibits the maximum power densities of 89.8 mW/cm2 at 30 °C and 264.2 mW/cm2 at 60 °C. Particularly, the reinforced hydroxide ions conduction and remarkable conductivity stability at subzero temperature have been realized owing to the confine of hydroxide ions conduction by chemically inert PVDF-SEBS binary polymer nanofibers. For instance, the hydroxide conductivity of the PVDF-SEBS/1%QACOF membrane is 2.58 mS/cm at -25 °C and retained to 32.4 mS/cm at 80 oC in a 480 h test.","PeriodicalId":82,"journal":{"name":"Journal of Materials Chemistry A","volume":null,"pages":null},"PeriodicalIF":10.7000,"publicationDate":"2024-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"An Novel Anion Exchange Membrane with Accelerated Hydroxide Ions Conduction through Quaternized Covalent Organic Framework Doped Electrospinning Binary Polymer\",\"authors\":\"Dan Wu, Niuniu Zhang, Weimin Gao, Qingquan Li, Xinna Gao, Shuang Wang, Quantong Che\",\"doi\":\"10.1039/d4ta04614e\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"The mutual restriction between hydroxide ions conductivity and alkaline stability is the main obstacle for the practical application of anion exchange membranes (AEMs) in anion exchange membrane fuel cells. In this research, we design a binary polymer nanofibers of polyvinylidene fluoride (PVDF) and polystyrene-block-poly(ethylene-ran-butylene)-block-polystyrene (SEBS) through the electrospinning technique. A quaternized covalent organic framework (QACOF) is synthesized to accelerate the hydroxide ions conduction though consisting of successive and hydrophilic hydroxide ions conduction channels based on the quaternary ammonium groups. Additionally, the ordered microchannel structures of QACOF can further accelerate the hydroxide ions conduction process. The novel AEMs are thus constructed via re-stacking of PVDF-SEBS binary polymer nanofibers with the designed QACOF. The QACOF can be closely adhered to PVDF-SEBS binary polymer nanofibers even if the PVDF-SEBS/1%QACOF membrane was immersed in 2 M of KOH solution for 480 h. As a result, the single fuel cell equipped with the PVDF-SEBS/1%QACOF membrane exhibits the maximum power densities of 89.8 mW/cm2 at 30 °C and 264.2 mW/cm2 at 60 °C. Particularly, the reinforced hydroxide ions conduction and remarkable conductivity stability at subzero temperature have been realized owing to the confine of hydroxide ions conduction by chemically inert PVDF-SEBS binary polymer nanofibers. For instance, the hydroxide conductivity of the PVDF-SEBS/1%QACOF membrane is 2.58 mS/cm at -25 °C and retained to 32.4 mS/cm at 80 oC in a 480 h test.\",\"PeriodicalId\":82,\"journal\":{\"name\":\"Journal of Materials Chemistry A\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":10.7000,\"publicationDate\":\"2024-09-21\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of Materials Chemistry A\",\"FirstCategoryId\":\"88\",\"ListUrlMain\":\"https://doi.org/10.1039/d4ta04614e\",\"RegionNum\":2,\"RegionCategory\":\"材料科学\",\"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 Materials Chemistry A","FirstCategoryId":"88","ListUrlMain":"https://doi.org/10.1039/d4ta04614e","RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}
An Novel Anion Exchange Membrane with Accelerated Hydroxide Ions Conduction through Quaternized Covalent Organic Framework Doped Electrospinning Binary Polymer
The mutual restriction between hydroxide ions conductivity and alkaline stability is the main obstacle for the practical application of anion exchange membranes (AEMs) in anion exchange membrane fuel cells. In this research, we design a binary polymer nanofibers of polyvinylidene fluoride (PVDF) and polystyrene-block-poly(ethylene-ran-butylene)-block-polystyrene (SEBS) through the electrospinning technique. A quaternized covalent organic framework (QACOF) is synthesized to accelerate the hydroxide ions conduction though consisting of successive and hydrophilic hydroxide ions conduction channels based on the quaternary ammonium groups. Additionally, the ordered microchannel structures of QACOF can further accelerate the hydroxide ions conduction process. The novel AEMs are thus constructed via re-stacking of PVDF-SEBS binary polymer nanofibers with the designed QACOF. The QACOF can be closely adhered to PVDF-SEBS binary polymer nanofibers even if the PVDF-SEBS/1%QACOF membrane was immersed in 2 M of KOH solution for 480 h. As a result, the single fuel cell equipped with the PVDF-SEBS/1%QACOF membrane exhibits the maximum power densities of 89.8 mW/cm2 at 30 °C and 264.2 mW/cm2 at 60 °C. Particularly, the reinforced hydroxide ions conduction and remarkable conductivity stability at subzero temperature have been realized owing to the confine of hydroxide ions conduction by chemically inert PVDF-SEBS binary polymer nanofibers. For instance, the hydroxide conductivity of the PVDF-SEBS/1%QACOF membrane is 2.58 mS/cm at -25 °C and retained to 32.4 mS/cm at 80 oC in a 480 h test.
期刊介绍:
The Journal of Materials Chemistry A, B & C covers a wide range of high-quality studies in the field of materials chemistry, with each section focusing on specific applications of the materials studied. Journal of Materials Chemistry A emphasizes applications in energy and sustainability, including topics such as artificial photosynthesis, batteries, and fuel cells. Journal of Materials Chemistry B focuses on applications in biology and medicine, while Journal of Materials Chemistry C covers applications in optical, magnetic, and electronic devices. Example topic areas within the scope of Journal of Materials Chemistry A include catalysis, green/sustainable materials, sensors, and water treatment, among others.