INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2025
·
IF 8.3
Wei Fan,Pengyun Zhao,Kuirong Feng,Ziyi Wang,Litao Tian,Jingmei Xu
In this paper, based on the molecular design perspective, sulfonated poly (aryl ether ketone) sulfone containing carboxyl groups (C-SPAEKS) was synthesized. Next, graphene oxide nanosheets functionalized with 5-amino-1H-tetrazole (5-AT@GO) were prepared by amination reaction. By introducing 5-AT@GO to C-SPAEKS matrix, all proportions of composite membranes were successfully prepared. The 5-AT@GO was characterized and composite membranes were used for testing. The C-SPAEKS/5-AT@GO-1 composite membrane displayed the maximum proton conductivity (163.21 mS cm −1 at 80 °C), which was enhanced by 200.60% compared with the unmodified membrane (81.36 mS cm −1 at 80 °C). Furthermore, the water absorption reached 27.89% at 80 °C, and the swelling rate remained below 20%. The C-SPAEKS/5-AT@GO-1 composite membrane also exhibited good thermal stability, oxidation stability and electrochemical properties. At 80 °C, C-SPAEKS/5-AT@GO-1 composite membrane presented a peak power density of 810.71 mW/cm 2 , and the open circuit voltage (OCV) was 1.0015V. Compared with the pure membrane (0.8973V, 190.72 mW/cm 2 ), the peak power density was 4.25 times higher. After a 65-h durability test, OCV of the membrane showed a loss of 5%, specifically, the date dropped from 0.7429V to 0.7061V. The above results indicate that the 5-amino-1H-tetrazole-functionalized graphene oxide nanosheets successfully improved the overall performance of proton exchange membranes (PEMs).
研究领域:
材料科学
·
能源科学
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2024
·
IF 8.1
Qiancan Wang,Dongchen Shen,Zhengkai Tu,Song Li
Incorporating metal-organic frameworks (MOFs) especially the ones with protic functional groups into proton exchange membrane (PEM) can effectively improve its proton conductivity . Lanthanide MOFs (Ln-MOFs) have been recognized as more potential candidates exhibiting proton dissociation capability. However, the performance of PEM upon integrating Ln-MOFs in water electrolyzer has yet to be investigated. In this study, Nafion composites with different loadings of lanthanide Ce-UiO-66 were prepared, characterized and tested by comparing with the non-lanthanide Zr-UiO-66. It was revealed that the proton conductivity of Ce-UiO-66/Nafion composite membrane was higher than pristine Nafion and Zr-UiO-66/Nafion membrane, which was attributed to the fact that the Ce-UiO-66 doping contributed to the construction of the hydrogen-bonded network to enhance the proton conductivity. At 3 wt% Ce-UiO-66 doping, the proton conductivity of the composite membrane can reach 124.45 mS/cm, which is significantly improved by 17 % compared with Zr-UiO-66/Nafion. Such a trend is mainly contributed by the lower proton affinity and proton transfer capability of Ce atoms in Ce-UiO-66, and the higher number of water molecules around Ce atoms favors the reduced tortuosity of the proton conduction pathway in membranes. Single electrolytic cell tests demonstrated the enhancement of electrolysis efficiency upon Ce-UiO-66 doping was improved from 58.77 % to 65.37 % at a current density of 2 A cm −2 .
研究领域:
材料科学
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能源科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2012
·
IF 3.85
Junkun Tang,Wangzhang Yuan,Jinhui Wang,Junke Tang,Hong Li,Yongming Zhang
Magnetic field treated perfluorosulfonate ionomer (PFSI) membranes (M-PMs) with improved through-plane proton conductivity are facilely fabricated though solvent casting of PFSI/Fe 3 O 4 nanocomposite dispersion without any third additive under magnetic field followed by discarding the Fe 3 O 4 nanoparticles . In the PFSI/Fe 3 O 4 nanocomposite membrane, Fe 3 O 4 nanoparticles are clearly uniaxially aligned by magnetic field. Subsequently, M-PMs are obtained by removing Fe 3 O 4 from the nanocomposite membranes to eliminate the negative effect of Fe 3 O 4 on proton conducting. The effect of magnetic field treatment on M-PMs' performance is investigated by both in- and through-plane proton conductivity. The results demonstrate that the through-plane proton conductivity of the M-PMs prepared from PFSI/Fe 3 O 4 nanocomposite membrane with optimized Fe 3 O 4 content is enhanced, while the in-plane proton conductivity is reduced compared to the pristine PFSI membrane, which indicate through-plane anisotropic phenomenon of proton conducting in the membranes. Such magnetic field treated PFSI membranes exhibit good appropriateness for using in electrochemical applications, for example fuel cells.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2012
·
IF 4.951
Yuning Zhao,Zhongyi Jiang,Daoshu Lin,Anjie Dong,Zhen Li,Hong Wu
Two kinds of phosphorylated silica submicrospheres were synthesized and incorporated into the sulfonated poly(ether ether ketone) (SPEEK) matrices to fabricate the hybrid membranes . Phosphorylation was carried out by the reaction of phosphorus oxychloride and the epoxy groups on the silica surface introduced by glycidyl-silane (SiP-I) or poly(glycidyl methacrylate) (SiP-II). The length of the chains and the amount of phosphoric acid groups (–PO 3 H 2 ) grafted on the silica surface were tuned by the above two different phosphorylation methods. The dispersion of SiP-II, anti-swelling and methanol resistant property of the SPEEK/SiP-II hybrid membranes were all enhanced. And the proton conductivity was increased by doping with both kinds of phosphorylated silica particles. While the SPEEK/SiP-I hybrid membranes with less amounts of –PO 3 H 2 groups showed unexpectedly much higher proton conductivities than the SPEEK/SiP-II hybrid ones at the same loadings ranging from 5 wt% to 20 wt%, and the highest reached 0.335 S cm −1 at 60 °C and 100% RH. The result was tentatively discussed in terms of effective proton-conducting groups/sites instead of the absolute amount of acidic groups.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2021
·
IF 8.742
Zimo Wang,Jiamo Ren,Yuxuan Sun,Li Wang,Yong Fan,Jifu Zheng,Huidong Qian,Shenghai Li,Jianing Xu,Suobo Zhang
The dispersion and compatibility of metal–organic frameworks (MOFs) in polymeric matrices significantly influence the properties of composite membranes . However, the modification and functionalization of the node structures of MOFs to improve their dispersion in the polymeric matrix have been rarely studied. In this work, the node structures of UiO-66-NH 2 frameworks were modified by the introduction of F species, and abundant Zr–F bonds and pore blocking effects were generated, which significantly affected the comprehensive performances of the composite membranes, including the dispersion, mechanical properties , proton conductivities, swelling ratios, and water uptake. Due to the good dispersion of the fluorinated MOF nanoparticles in the Nafion matrix, the composite membranes had high proton/methanol selectivity and low methanol permeability, which exhibited superior fuel cell performances in DMFCs (24.9–26.8 mW cm −2 ) to that of recast Nafion (20.4 mW cm −2 ). Notably, this was the first time that the node structures of MOF-based nanoparticles were fluorinated to improve their dispersion in a polymeric matrix, providing a simple strategy for developing high-performance composite membranes.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2016
·
IF 6.333
Hang Wang,Xiaojie Li,Xupin Zhuang,Bowen Cheng,Wei Wang,Weimin Kang,Lei Shi,Hongjun Li
Proton currents are an integral part of the most important energy-converting structures in biology. We prepared a new type of bioinspired Nafion (Bio-Nafion) membrane composited of biofunctional SiO 2 (Bio-SiO 2 ) nanofiber and Nafion matrix . SiO 2 nanofibers were prepared by electrospinning silica sol prepared from tetraethyl orthosilicate . Meanwhile, Bio-SiO 2 nanofibers were synthesized by immobilizing amino acids (cysteine, serine , lysine, and glycine) on SiO 2 nanofibers, which acted as efficient proton-conducting pathways that involved numerous H + transport sites. In our study, the SiO 2 nanofibers biofunctionalized with cysteine were further oxidized, and the composite membranes were designated as Nafion-Cys, Nafion-Lys, Nafion-Ser, and Nafion-Gly, respectively. We then investigated the different polar groups ( SO 3 H, OH, and NH 2 ) of the amino acids that contributed to membrane properties of thermal stability, water uptake (WU), dimensional stability, proton conductivity , and methanol permeability . Nafion-Cys exhibited the highest proton conductivity of 0.2424 S/cm (80 °C). Nafion-Gly showed the lowest proton conductivity and WU because glycine contains the least number of hydrophilic groups among the amino acids. Overall, the introduction of Bio-SiO 2 nanofiber to composite membranes significantly improved proton conductivity, dimensional stability, and methanol permeability.
研究领域:
材料科学
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能源科学
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生物仿生学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF SOLID STATE CHEMISTRY
·
2015
·
IF 2.133
Li-Te Ren,Xiao-Pei Li,Jian-Lan Liu,Xiao-Ming Ren
The proton-conducting materials have potential application in devices such as fuel cells. In this study, a mineral kaolinite-based proton conducting material, kaolinite-4-amidinopyridinium hydrochloride (K-4-APy–HCl), was synthesized by the intercalated compound kaolinite-4-amidinopyridine (K-4-APy) adsorbing volatilizing HCl. The thermogravimetric analysis (TG), powder X-ray diffraction (PXRD) and IR spectrum confirmed the HCl successfully inserting into the interlayer space of kaolinite and the 4-aminopyridine being protonated. The intercalation efficiency is estimated to be ca. 85.6%. With respect to K-4-APy, the interlayer space expends by 1.53 Å. The thermal decomposition mechanism was studied by PXRD and TG techniques. The K-4-APy–HCl shows proton conductivity with σ =3.379×10 −8 S cm −1 at 373 K and E a =1.159 eV in the anhydrous condition, which are comparable to MOFs-based proton conducting materials.
研究领域:
材料科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY
·
2017
·Vol. 56
·期 1
·25-37
·
IF 2.952
Yunji Xie,Di Liu,Danqi Li,Xiaocui Han,Su Li,Zheng Chen,Haibo Zhang,Jinhui Pang,Zhenhua Jiang
A new bisphenol monomer containing a pair of electron-rich tetra-arylmethane units was designed and synthesized. Based on this monomer, along with commercial 4,4′-(hexafluoroisopropylidene)diphenol A and 4,4′-difluorobenzophenone, a series of novel poly(arylene ether ketone)s containing octasulfonated segments of varying molar percentage (x) (6F-SPAEK-x) were successfully synthesized by polycondensation reactions, followed by sulfonation. Tough, flexible, and transparent membranes, exhibiting excellent thermal stabilities and mechanical properties were obtained by casting. 6F-SPAEK-x samples exhibited appropriate water uptake and swelling ratios at moderate ion exchange capacities (IECs) and excellent proton conductivities. The highest proton conductivity (215 mS cm −1 ) is observed for hydrated 6F-SPAEK-15 (IEC = 1.68 meq g −1 ) at 100 °C, which is more than 1.5 times that of Nafion 117. Furthermore, the 6F-SPAEK-10 membrane exhibited comparable proton conductivity (102 mS cm −1 ) to that of Nafion 117 at 80 °C, with a relatively low IEC value (1.26 meq g −1 ). Even under 30% relative humidity, the 6F-SPAEK-20 membrane (2.06 meq g −1 ) showed adequate conductivity (2.1 mS cm −1 ) compared with Nafion 117 (3.4 mS cm −1 ). The excellent comprehensive properties of these membranes are attributed to well-defined nanophase-separated structures promoted by strong polarity differences between highly ionized and fluorinated hydrophobic segments. © 2017 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2018 , 56 , 25–37
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2021
·
IF 5.816
Zhenguo Zhang,Jiahui Ren,Mengchi Ju,Xuan Chen,Jingmei Xu,Zhe Wang,Lingxin Meng,Pengyun Zhao,Hao Wang
Metal-organic frameworks are new kinds of porous crystalline materials. The Zr-based metal-organic framework (MOF-801) is consists of [Zr 6 (u 3 -O) 4 (u 3 -OH) 4 ] 12+ clusters and fumaric acid connectors. MOF-801 has excellent mechanical properties , high chemical stability and high water absorption capacity . There are a large number of hydrophilic functional groups inside MOF-801, which is effective to promote interfacial compatibility between MOF-801 and polymer matrixes . In this work, the MOF-801 with structural defects was synthesized through the solvothermal method by adding excess formic acids as the regulator. These structural defects could confer MOF-801 high surface area (2476.34 m 2 g −1 ) and promote the water absorption capacity. Moreover, structural defects could also expose more open metal sites of MOF-801, thereby increasing the Lewis acidity of MOF-801. Then, the hybrid membranes were synthesized by combining the MOF-801 with structural defects and C-SPAEKS. Dense hydrogen-bond networks formed between the MOF-801 and C-SPAEKS further promote enhance proton conductivity . At the condition of 90 °C and 100% relative humidity, the highest proton conductivity of hybrid membranes reached 0.100 S cm −1 , which is similar to that of Nafion 117. Meanwhile, these hybrid membranes showed outstanding chemical and thermal stabilities. These results indicate that these hybrid membranes have potential as proton exchange membranes .
研究领域:
材料科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2021
·Vol. 11
·期 47
·29527-29536
·
IF 3.361
Lian Sun,Quanchao Gu,Honglei Wang,Jinshan Yu,Xingui Zhou
A high-temperature proton exchange membrane was fabricated based on polyvinylidene fluoride (PVDF) and polyvinylpyrrolidone (PVP) blend polymer nanofibers. Using electrospinning method, abundant small ionic clusters can be formed and agglomerated on membrane surface, which would facilitate the proton conductivity. To further enhance the conductivity, phosphoric acid (PA) retention as well as mechanical strength, sulfamic acid (SA)-doped metal–organic framework MIL-101 was incorporated into PVP-PVDF blend nanofiber membranes. As a result, the anhydrous proton conductivity of the composite SA/MIL101@PVP-PVDF membrane reached 0.237 S cm−1 at 160 °C at a moderate acid doping level (ADL) of 12.7. The construction of long-range conducting network by electrospinning method combined with hot-pressing and the synergistic effect between PVP-PVDF, SA/MIL-101 and PA all contribute to the proton conducting behaviors of this composite membrane.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF POWER SOURCES
·
2024
·
IF 8.1
Jiaxin Pan,Zhiwei Wang,Zhongli Zhang,Jinyao Chen,Ya Cao
The proton exchange membrane (PEM) constitutes a pivotal component of the fuel cell, with its property frequently serving as a determining factor in the overall performance of the fuel cell. In this study, a composite membrane with excellent comprehensive properties for direct methanol fuel cells (DMFC) is obtained by doping a highly conductive proton-ionic liquid (PIL) into a polyvinyl alcohol (PVA) crosslinked membrane. The physicochemical properties of three PILs with different ΔpK a are characterized, and the relationship between their structure and properties is researched and the proton conduction mechanism of different PILs is clarified. Subsequently, the PIL exhibiting the optimal comprehensive performance is doped into the PVA crosslinking system, thereby introducing further proton conduction groups into the original system and enhancing the proton conductivity of PEMs. When the content of the PIL was 20 wt%, the CPVA/IL-20 composite membrane exhibits the most favorable comprehensive performance, with a proton conductivity of 53.5 mS/cm at 80 °C, and a peak power density of 42.7 mW/cm 2 at 80 °C with 100 % RH, which is 1.7 times that of CPVA without PIL. The methanol permeability and selectivity at room temperature are 6.5 × 10 −7 cm 2 s −1 and 3.75 × 10 4 S s cm −3 , respectively.
研究领域:
材料科学
·
能源工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2025
·
IF 9
Quan Wang,Peng Song,Yi Zhang,Naixin Wang,Quan-Fu An
The utilization of intermittent clean energy requires high efficient energy storage technologies to minimize energy losses during charge-discharge processes. In this work, ionic covalent organic polymer (iCOP) composite membranes are presented to promote the battery efficiencies of iron-chromium redox flow battery (ICRFB). iCOP powder was synthesized by interfacial polymerization method and the resulting composite membrane possessed superior physicochemical membrane. Sulfonic acid groups in the synthesized iCOP facilitated the proton transportation of the prepared membranes. A hydrogen bond network formed between perfluorinated PEM and iCOP further promoted the proton transportation of the membrane. Meanwhile, the positively charged amino groups under acidic conditions reduced the permeation of Fe 3+ and Cr 3+ ions due to the Donnan effect. Specifically, proton conductivity of iCOP-8 membrane reached 215 mS cm −1 at 80 °C. Moreover, iCOP-8 demonstrated the lowest permeation rates for both Fe 3+ (1.44 × 10 −7 cm s −1 ) and Cr 3+ (0.47 × 10 −7 cm s −1 ) among all membranes herein. In terms of the ICRFB efficiencies, a Coulombic efficiency of 97.66 % and energy efficiency of 87.11 % was achieved at a current density of 100 mA cm −2 . The battery also operated stably for over 200 cycles without significant performance degradation (CE: >97.01 %, EE: >86.01 %).
研究领域:
材料科学
·
能源技术
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）