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A review on ion-exchange nanofiber membranes: properties, structure and application in electrochemical (waste)water treatment. Sep Purif Technol 2022. [DOI: 10.1016/j.seppur.2022.120529] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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Electrospun Hybrid Perfluorosulfonic Acid/Sulfonated Silica Composite Membranes. MEMBRANES 2020; 10:membranes10100250. [PMID: 32977438 PMCID: PMC7598158 DOI: 10.3390/membranes10100250] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/28/2020] [Revised: 09/17/2020] [Accepted: 09/19/2020] [Indexed: 11/17/2022]
Abstract
Electrospinning was employed to fabricate composite membranes containing perfluorosulfonic acid (PFSA) ionomer, poly(vinylidene fluoride) (PVDF) reinforcement and a sulfonated silica network, where the latter was incorporated either in the PFSA matrix or in the PVDF fibers. The best membrane, in terms of proton conductivity, was made by incorporating the sulfonated silica network in PFSA fibers (Type-A) while the lowest conductivity membrane was obtained when sulfonated silica was incorporated into the reinforcing PVDF fibers (Type-B). A Type-A membrane containing 65 wt.% PFSA with an embedded sulfonated silica network (at 15 wt.%) and with 20 wt.% PVDF reinforcing fibers proved superior to the pristine PFSA membrane in terms of both the proton conductivity in the 30-90% RH at 80 °C (a 25-35% increase) and lateral swelling (a 68% reduction). In addition, it was demonstrated that a Type-A membrane was superior to that of a neat 660 EW perfluoroimide acid (PFIA, from 3M Co.) films with respect to swelling and mechanical strength, while having a similar proton conductivity vs. relative humidity profile. This study demonstrates that an electrospun nanofiber composite membrane with a sulfonated silica network added to moderately low EW PFSA fibers is a viable alternative to an ultra-low EW fluorinated ionomer PEM, in terms of properties relevant to fuel cell applications.
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Wang H, Zhuang X, Wang X, Li C, Li Z, Kang W, Yin Y, Guiver MD, Cheng B. Proton-Conducting Poly-γ-glutamic Acid Nanofiber Embedded Sulfonated Poly(ether sulfone) for Proton Exchange Membranes. ACS APPLIED MATERIALS & INTERFACES 2019; 11:21865-21873. [PMID: 31185563 DOI: 10.1021/acsami.9b01200] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Development and fabrication of novel proton exchange membranes (PEMs) with excellent performance have a great significance to the commercial application of PEM fuel cell. Inspired from the proton-conducting mechanism, γ-poly(glutamic acid) (γ-PGA) nanofibers (NFs) are first fabricated by solution blowing with the help of polylactic acid (PLA) and designed to form amino acid arrays as efficient proton channels for PEMs. The NFs with 50% γ-PGA exhibit a high proton conductivity of 0.572 S cm-1 at 80 °C/50% relative humidity (RH), and 1.28 S cm-1 at 40 °C/90% RH. Density functional theory is carried out to explain the mechanisms of proton hopping in γ-PGA, and the activation energy barriers from NH to COO- for trans and cis conformations under anhydrous conditions are only 0.64 and 0.62 eV, respectively. Then the γ-PGA/PLA NFs are incorporated into sulfonated poly(ether sulfone) to prepare PEMs, which show remarkable performance compared with the Nafion membrane. The composite membrane with 30 wt % NFs exhibits the highest proton conductivity (0.261 S cm-1 at 80 °C/100% RH). The direct methanol fuel cells with this membrane show a maximum power density (202.3 mW cm-2) among all of the PEMs, showing great application potential in the field of PEMs.
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Affiliation(s)
| | | | | | - Congju Li
- School of Energy and Environmental Engineering , University of Science and Technology Beijing , Beijing 100083 , P. R. China
| | | | | | - Yan Yin
- State Key Laboratory of Engines , Tianjin University , Tianjin 300072 , P. R. China
| | - Michael D Guiver
- State Key Laboratory of Engines , Tianjin University , Tianjin 300072 , P. R. China
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Huang L, He Y, Jin L, Hou X, Miao L, Lü C. Fabrication and Properties of Graphene Oxide/Sulfonated Polyethersulfone Layer-by-layer Assembled Polyester Fiber Composite Proton Exchange Membranes. Chem Res Chin Univ 2018. [DOI: 10.1007/s40242-018-7313-0] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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Ni H, Zhou J, Yang Y, Ji J, Wu M. Preparation of poly(NaSS- co
-HEMA) self-supporting nanofiltration membrane with high cationic permselectivity by electrospinning. J Appl Polym Sci 2017. [DOI: 10.1002/app.45541] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Henmei Ni
- School of Chemistry and Chemical Engineering; Southeast University; Nanjing 211189 China
| | - Jinhui Zhou
- School of Chemistry and Chemical Engineering; Southeast University; Nanjing 211189 China
| | - Yadong Yang
- School of Chemistry and Chemical Engineering; Southeast University; Nanjing 211189 China
| | - Jie Ji
- Nanjing Foreign Language School; Nanjing 210008 China
| | - Min Wu
- School of Chemistry and Chemical Engineering; Southeast University; Nanjing 211189 China
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Lancel G, Stevens P, Toussaint G, Maréchal M, Krins N, Bregiroux D, Laberty-Robert C. Hybrid Li Ion Conducting Membrane as Protection for the Li Anode in an Aqueous Li-Air Battery: Coupling Sol-Gel Chemistry and Electrospinning. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2017; 33:9288-9297. [PMID: 28482152 DOI: 10.1021/acs.langmuir.7b00675] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Aqueous lithium-air batteries have very high theoretical energy densities, which potentially makes this technology very interesting for energy storage in electric mobility applications. However, the aqueous electrolyte requires the use of a watertight layer to protect the lithium metal, typically a thick NASICON glass-ceramic layer, which adds ohmic resistance and penalizes performance. This article deals with the replacement of this ceramic electrolyte by a hybrid organic-inorganic membrane. This new membrane combines an ionically conducting inorganic phase for Li ion transport (Li1.3Al0.3Ti1.7(PO4)3 (LATP) and a poly(vinylidene fluoride-co-hexafluoropropylene) (PVDF-HFP) polymer for water tightness and mechanical properties. The Li ion transport through the membrane is ensured by an interconnected 3-D network of crystalline LATP fibers obtained by coupling an electrospinning process with the sol-gel synthesis followed by thermal treatment. After an impregnation step with PVDF-HFP, hybrid membranes with different volumetric fractions of PVDF-HFP were synthesized. These membranes are watertight and have Li ion conductivities ranging from 10-5 to 10-4 mS/cm. The conductivity depends on the PVDF-HFP volume fraction and the fibers' alignment in the membrane thickness, which in turn can be tuned by adjusting the water content in the electrospinning chamber during the process. The alignment of fibers parallel to the membrane surface is conductive to poor conductivity values whereas a disordered fiber mat leads to interesting conductivity values (1 × 10-4 mS/cm) at ambient temperature.
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Affiliation(s)
- Gilles Lancel
- Sorbonne Universités , UPMC Univ Paris 06, CNRS, Collège de France, Laboratoire de Chimie de la Matière Condensée de Paris, 4 place Jussieu, 75005 Paris, France
- EDF R&D, 77818 Moret Sur Loing, Cedex, France
| | | | | | - Manuel Maréchal
- Univ. Grenoble Alpes , CNRS, CEA, INAC, SYMMES, F-38000 Grenoble, France
| | - Natacha Krins
- Sorbonne Universités , UPMC Univ Paris 06, CNRS, Collège de France, Laboratoire de Chimie de la Matière Condensée de Paris, 4 place Jussieu, 75005 Paris, France
| | - Damien Bregiroux
- Sorbonne Universités , UPMC Univ Paris 06, CNRS, Collège de France, Laboratoire de Chimie de la Matière Condensée de Paris, 4 place Jussieu, 75005 Paris, France
| | - Christel Laberty-Robert
- Sorbonne Universités , UPMC Univ Paris 06, CNRS, Collège de France, Laboratoire de Chimie de la Matière Condensée de Paris, 4 place Jussieu, 75005 Paris, France
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Ni H, Yang Y, Chen Y, Liu J, Zhang L, Wu M. Preparation of a poly(DMAEMA-co-HEMA) self-supporting microfiltration membrane with high anionic permselectivity by electrospinning. E-POLYMERS 2017. [DOI: 10.1515/epoly-2016-0207] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
AbstractA cross-linked microfibrous anion exchange membrane with high ion permselectivity and robust mechanical properties was fabricated by electrospinning. Copolymer, poly N,N-dimethylaminoethyl methacrylate (DMAEMA)-co-2-hydroxyethyl methacrylate (HEMA), was selected as the electrospun material. Fourier transform infrared (FTIR) spectroscopy, 1HNMR and scanning electron microscopy (SEM) were employed to characterize the copolymer and microfibrous mat. The electrospinning optimal parameters were determined by orthogonal experiments. Formaldehyde vapor was applied to crosslink the mat. It was observed that the water sorption decreased from 75.7% to 30.4% as the crosslinking time increased from 20 h to 32 h. The robust mat with the high tensile strength of 4.62 MPa and 50% elongation at break was obtained at 24 h. The ion permeability of NO3−, Cl−, SO42− were 94, 91 and 87%.
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Affiliation(s)
- Henmei Ni
- 1School of Chemistry and Chemical Engineering, Southeast University, Southeast University Road 2, Nanjing 211189, China
| | - Yadong Yang
- 1School of Chemistry and Chemical Engineering, Southeast University, Southeast University Road 2, Nanjing 211189, China
| | - Yixuan Chen
- 1School of Chemistry and Chemical Engineering, Southeast University, Southeast University Road 2, Nanjing 211189, China
| | - Junxiu Liu
- 1School of Chemistry and Chemical Engineering, Southeast University, Southeast University Road 2, Nanjing 211189, China
| | - Lijuan Zhang
- 1School of Chemistry and Chemical Engineering, Southeast University, Southeast University Road 2, Nanjing 211189, China
| | - Min Wu
- 1School of Chemistry and Chemical Engineering, Southeast University, Southeast University Road 2, Nanjing 211189, China
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