Nature Communications
·
2023
·Vol. 14
·期 1
·1-9
·
IF 16.6
Guan Lijiang,Guo Zhaoqi,Zhou Qi,Zhang Jin,Cheng Cheng,Wang Shengyao,Zhu Xiang,Dai Sheng,Jin Shangbin
Proton-conducting materials are essential to the emerging hydrogen economy. Covalent triazine frameworks (CTFs) are promising proton-conducting materials at high temperatures but need more effective sites to strengthen interaction for proton carriers. However, their construction and design in a concise condition are still challenges. Herein, we show a low temperature approach to synthesize CTFs via a direct cyclotrimerization of aromatic aldehyde using ammonium iodide as facile nitrogen source. Among the CTFs, the perfluorinated CTF (CTF-TF) was successfully synthesized with much lower temperature ( ≤ 160 °C) and open-air atmosphere. Due to the additional hydrogen-bonding interaction between fluorine atoms and proton carriers (H 3 PO 4 ), the CTF-TF achieves a proton conductivity of 1.82 × 10 −1 S cm −1 at 150 °C after H 3 PO 4 loading. Moreover, the CTF-TF can be readily integrated into mixed matrix membranes, displaying high proton conduction abilities and good mechanical strength. This work provides an alternative strategy for rational design of proton conducting media.
研究领域:
材料科学
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化学工程
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能源材料
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产品关联
DOI
PubMed
高影响因子
Nature Communications
·
2019
·Vol. 10
·期 1
·1-13
·
IF 11.878
Liu Xin,Li Yi,Xue Jiandang,Zhu Weikang,Zhang Junfeng,Yin Yan,Qin Yanzhou,Jiao Kui,Du Qing,Cheng Bowen,Zhuang Xupin,Li Jianxin,Guiver Michael D.
Proton exchange membranes with short-pathway through-plane orientated proton conductivity are highly desirable for use in proton exchange membrane fuel cells. Magnetic field is utilized to create oriented structure in proton exchange membranes. Previously, this has only been carried out by proton nonconductive metal oxide-based fillers. Here, under a strong magnetic field, a proton-conducting paramagnetic complex based on ferrocyanide-coordinated polymer and phosphotungstic acid is used to prepare composite membranes with highly conductive through-plane-aligned proton channels. Gratifyingly, this strategy simultaneously overcomes the high water-solubility of phosphotungstic acid in composite membranes, thereby preventing its leaching and the subsequent loss of membrane conductivity. The ferrocyanide groups in the coordinated polymer, via redox cycle, can continuously consume free radicals, thus helping to improve the long-term in situ membrane durability. The composite membranes exhibit outstanding proton conductivity, fuel cell performance and durability, compared with other types of hydrocarbon membranes and industry standard Nafion ® 212.
研究领域:
材料科学
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电化学
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能源技术
✓ 已验证
DOI
PubMed
高影响因子
DALTON TRANSACTIONS
·
2021
·Vol. 50
·期 17
·5943-5950
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IF 4.39
Lu Feng,Jirong Lan,Fangyuan Chen,Haobo Hou,Hong Zhou
Metal–organic frameworks (MOFs), as a new class of proton conductors, have attracted much attention in the application of proton exchange membranes due to their precisely defined structure and tailorable functionality. However, for most of the MOF materials, their long-term stability is a huge barrier to practical application. Therefore, the structural stability of MOFs is an important prerequisite for the design and development of proton conductors with ultra-high conductivity. In this study, the stable UiO-66-NH2 is optimized as the precursor, and the modified material of DT-UiO-66 is designed and developed by introducing the 3,5-diamino-1,2,4-triazole molecule into the framework of UiO-66-NH2 through a post-synthesis strategy. Satisfactorily, DT-UiO-66 maintains the stability of the original skeleton. The alternating current impedance measurements indicate that a significantly improved proton conductivity of 4.47 × 10−3 S cm−1 is obtained at 100% relative humidity (RH) and 373 K for DT-UiO-66, which is attributed to the increasing number of proton sources and hopping sites. Moreover, DT-UIO-66 shows an outstanding stability under high temperature and high humidity conditions for at least 16 h, suggesting its potential application as a proton exchange membrane.
研究领域:
材料科学
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化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF PHYSICAL CHEMISTRY B
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2021
·
IF 2.991
Bin-Cheng Wang,Xiu-Ping Li,Biao-Biao Hao,Chen-Xi Zhang,Qing-Lun Wang
A coordination polymer with dual functions of high proton conductivity and highly sensitive fluorescent sensors demonstrates a great application potential. In this work, a cadmium-based coordination polymer (denoted as CP 1) with hydrothermal stability was synthesized. The abundant coordination water, lattice water, and amino groups make an extended hydrogen-bonding pathway for efficient proton migration, which endows CP 1 with the highest proton conductivity of 2.41 × 10–3 S·cm–1 at 353 K and 98% RH. Especially, the proton conductivity of the chitosan (CS) hybrid membrane containing CP 1 reaches a maximum value of 2.62 × 10–2 S·cm–1 under 343 K and 98% RH, which increases almost 7 times higher than that of the pure CS membrane due to the host–guest collaboration. Furthermore, luminescence studies revealed that CP 1 is a high-sensitivity and good-selectivity fluorescent probe for the detection of trace amounts of l-histidine with a lowest detection limit of 1.0 × 10–8 M.
研究领域:
材料科学
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化学
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生物传感
✓ 已验证
DOI
高影响因子
JOURNAL OF POWER SOURCES
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2024
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IF 8.1
Hongsheng Liu,Hengyue Li,Bin Huang,Yange Yang,Haibo Guo,Yan Xiao,Weiguang Yang
To enhance the proton conductivity and durability of Ce-based hybrid proton exchange membranes (PEMs), this study fabricates modified perfluorosulfonic acid (PFSA) hybrid membranes by incorporating the dual-function γ-AlOOH@Ti-supported CeO 2 composite oxide (γ-AlOOH@Ti/CeO 2 ). In addition to combining the inherent proton conductivity of γ-AlOOH with the excellent radical scavenging ability of CeO 2 , both the proton conductivity and durability of Ce-based PEMs are further improved by introducing Ti-dopant, which not only increases hydrogen vacancies on the surface of γ-AlOOH, which facilitate proton conduction, and induces electron transfer from γ-AlOOH@Ti to CeO 2 , which enhance free radical adsorption. As results shown, the proton conductivity and the fluoride release value of the resulting hybrid membrane are about 76 % higher and 35.25 % lower than those of the PFSA-CeO 2 membrane, respectively. Moreover, the performance of cells shows that, after accelerated degradation testing, the PFSA-γ-AlOOH@Ti/CeO 2 membrane exhibits the lowest peak power density decrease rate, the impedance increase rate and hydrogen crossover current density, with 11.79 %, 27.54 % and 3.04 mA cm −2 , respectively. These results suggest that compared to CeO 2 -hybrid PEMs, γ-AlOOH@Ti/CeO 2 -based hybrid PEMs exhibit higher proton conductivity and superior chemical stability, indicating the potential application of γ-AlOOH@Ti/CeO 2 -based hybrid PEMs in proton exchange membrane fuel cells.
研究领域:
材料科学
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能源化学
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电化学
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry C
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2025
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IF 5.1
Shuping Xue,Ying Lu,Jun Geng,Jingqi Yang,Maochun Zhu,Xue Bai,Shuxia Liu
With the rapid development of flexible conductive materials, the demand for ionic conductive hydrogels with excellent mechanical properties, high conductivity, and multifunctionality under various environmental conditions is growing at an unprecedented rate. However, hydrogels with both proton conductivity and photochromic properties have hardly been reported. Herein, we introduce a straightforward and environmentally friendly one-pot method for the synthesis of multifunctional POM-based hydrogels named PAM-HPC-Gly-Mo7-x% (PHGMo-x%) by encapsulating [(NH4)6Mo7O24⋅4H2O] (Mo7) and glycerol in hydrogels with a semi-interpenetrating polymer network (Semi-IPN) made of polyacrylamide (PAM) and hydroxypropyl cellulose (HPC). As an exemplary representative, PHGMo-15% exhibits a very high proton conductivity (0.142 S·cm-1 at room temperature and 4.57 × 10-2 S·cm-1 at -10 ℃), a fast UV response time (20 s), and good color change reversibility. Moreover, PHGMo-15% also has excellent self-adhesion capability as well as high stretchability (606%). This design idea based on the combination of semi-interpenetrating network and multifunctional component (Mo7) realizes the integration of adhesion, photochromic properties, conductivity, and excellent mechanical properties of the hydrogels, which enables these multifunctional hydrogels to show new potential applications in the fields of flexible strain sensors, information storage device, and inkless printing.
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
CARBOHYDRATE POLYMERS
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2024
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IF 10.7
Yuan Gao,Peng He,Jingwen Yang,Bo Liu,Qiong Zhang,Qi Zhou,Hanlu Xu,Rongli Jiang,Zhongran Dai,Shaorong Wang
We focus on optimizing acid-base interactions and hydrogen bonding networks to achieve enhanced proton conductivity under low relative humidity (RH) and high temperature. By functionalizing UiO-66-(COOH) 2 with glutamic acid (Glu) and lysine (Lys), we generate Glu-UiO-66-(COOH) 2 and Lys-UiO-66-(COOH) 2 . These modified materials are subsequently incorporated into chitosan (CS) to produce the composites Glu-UiO-66-(COOH) 2 @CS and Lys-UiO-66-(COOH) 2 @CS. The successful incorporation of amino acids and cross-linking between -COOH and -NH 2 groups in the composites, confirmed by FTIR and PXRD analyses, significantly enhances the structural integrity and durability by strengthening the network, and reducing polymer chain mobility. Proton conductivity assessments reveal that Lys-UiO-66-(COOH) 2 @CS-7 exhibits a remarkable conductivity of 0.022 S/cm at 100 % RH and 363 K, outperforming Glu-UiO-66-(COOH) 2 @CS-7. The lower activation energy ( E a ) of 0.28 eV for Lys-UiO-66-(COOH) 2 @CS-7, compared to 0.336 eV for Glu-UiO-66-(COOH) 2 @CS-7, highlights the significant improvement in intramolecular acid-base interactions and hydrogen bonding. Furthermore, Lys-UiO-66-(COOH) 2 @CS-7 maintains notable proton conductivity at 43 % RH, with an E a of 0.216 eV, demonstrating its efficacy in low-humidity conditions. These findings underscore the profound impact of amino acid modifications and cross-linking on proton conductivity by reinforcing acid-base interactions, hydrogen bonding networks, and proton transfer efficiency.
研究领域:
材料科学
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化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2015
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IF 5.056
Qiang Xie,Yifan Li,Jing Hu,Xiaojing Chen,Haibin Li
Solid acids are considered as a promising electrolyte for intermediate temperature fuel cells (ITFCs), but their application is hindered by their inherent shortcomings, including poor mechanical properties , limited chemical stability, low proton conductivity at low temperature and narrow high-conductivity temperature range. Despite much work devoted to addressing these shortcomings, none of them can tackle these issues simultaneously. In view of this, we reported a composite electrolyte membrane based on CsH 2 PO 4 , sulfonated poly(ether ether ketone) and phosphosilicate sol. The electrolyte membrane was fabricated by using a simple sol–gel process combined with mechanical ball-milling. The prepared electrolyte membrane exhibits excellent mechanical performance with a tensile strength of 23.5 MPa, despite an inorganics content of 70 wt%. The electrolyte membrane can keep intact even if it is heated to 260 °C. The measurement of proton conductivity shows that the electrolyte membrane can maintain a high conductivity of above 10 −3 S cm −1 over a broad temperature range of 130–230 °C under ambient condition without humidifying. The successful fabrication of the electrolyte membrane not only provides a promising membrane for ITFCs, but also opens fresh insights for the development of electrolytes with superior comprehensive performance and the application of solid acids in ITFCs.
研究领域:
材料科学
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能源工程
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2022
·Vol. 10
·期 32
·16995-17000
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IF 14.511
Benbing Shi,Xiao Pang,Hong Wu,Jianliang Shen,Jingyuan Guan,Xiaoyao Wang,Chunyang Fan,Li Cao,Tianhao Zhu,Zhuoyu Yin,Yan Kong,Yiqin Liu,Sijia Wang,Zhongyi Jiang
Robust and highly conductive proton exchange membranes are urgently required in fuel cells. Inspired by the underwater adhesion of sandcastle worms, herein, ultra-robust and highly conductive polymer carbon dot membranes (PCDMs) were fabricated via electrostatic complexation between zero-dimensional acidic group functionalized polymer carbon dots (PCDs) and sulfonated polyether ether ketone (SPEEK) in water solution. PCDs with different acid groups were designed to modulate the electrostatic complexation. The superior interface compatibility endows PCDMs with the highest PCD content of 50 wt%, meanwhile, phosphate functionalized PCDs endow the PCDMs with abundant proton transport sites and a low energy barrier proton transport pathway. As a result, the corresponding PCDMs exhibited a high proton conductivity of 264 mS cm−1 under 100% RH at 80 °C. Meanwhile, the PCDMs exhibited a high stress of 56 MPa and dimensional stability under 100% RH at 80 °C.
研究领域:
材料科学
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化学工程
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能源科学
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2022
·
IF 5.532
Zezhong Wang,Ying Li,Wenlong Huang,Yushi Ding
In this work, Ba 3 Ba 1+ x Ta 2- x O 9- δ ( x = 0, 0.1, 0.3, and 0.5) double perovskite proton conductors were prepared by solid-state reaction process. Phase compositions and microstructures were characterized by X-ray diffraction and field emission scanning electron microscope techniques. valence and semi-quantitative composition of components were identified by X-ray photoelectron spectroscopy. Conductivities of Ba 3 Ba 1+ x Ta 2- x O 9- δ were then measured under various vapor and oxygen pressures by AC impedance spectroscopy technique. Results revealed linear increase in total conductivities of Ba 3 Ba 1+ x Ta 2- x O 9- δ oxides as a function of temperature. Ba 3 Ba 1.3 Ta 1.7 O 8.55 exhibited the highest total conductivity of 8.41 × 10 −4 S cm −1 under humidity and 800 °C. The transport numbers calculated by defect equilibria model revealed. Ba 3 Ba 1+ x Ta 2- x O 9-δ oxides as pure proton conductors at 400–800 °C. Also, transport numbers of oxide ions and holes both increased with temperature. Ba 3 Ba 1.3 Ta 1.7 O 8.55 illustrated the highest protonic transport number of 0.60 at 800 °C. In sum, these results suggest that Ba 3 Ba 1+ x Ta 2- x O 9- δ oxides display excellent proton conductivity.
研究领域:
材料科学
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化学
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2024
·
IF 8.1
Keyao Wang,Yinghui Cui,Jiupai Ni,Chengsheng Ni
BaFe 0.8-x Cu x Zr 0.1 Y 0.1 O 3-δ (0 ≤ x ≤ 0.15) perovskite was investigated as the cathode material for low-temperature proton-conducting solid oxide fuel cells (H-SOFCs). Cu doping in BaFe 0.8 Zr 0.1 Y 0.1 O 3-δ (Cu0) improves the proton conductivity and surface exchange kinetics. The chemical bulk diffusion coefficient ( D chem ) and the chemical oxygen surface exchange coefficient ( K chem ) of BaFe 0.75 Cu 0.05 Y 0.1 Zr 0.1 O 3-δ (Cu5) and BaFe 0.7 Cu 0.1 Y 0.1 Zr 0.1 O 3-δ (Cu10) were both increased compared to Cu0. Thermogravimetric analysis (TGA) of Cu5 and Cu10 in air showed larger revsivle oxygen loss than that of Cu0. A significant improvement in current output was observed at 600 °C: cell with BaFe 0.65 Cu 0.15 Y 0.1 Zr 0.1 O 3-δ (Cu15), Cu10 and Cu5 cathode demonstrated current densities 100.7 %, 438.4 %, and 253.8 % higher, respectively, than the one with Cu0 at 0.6 V after more than 100 h of durability. This work demonstrated that the optimal Cu doping on ferrite cathode could improve the proton transport kinetics and is able to deliver a improved performance and stability for low-temperature (≤600 °C) H-SOFCs.
研究领域:
材料科学
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能源
·
电化学
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燃料电池
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Lulu Jiang,Donglin Han
BaZr 0.9 Y 0.1 O 3-δ (BZY10) is a popular composition for the electrolyte in protonic ceramic cells, due to its relatively high proton conductivity, excellent chemical stability, and good compatibility with NiO negatrode substrate during high temperature co-sintering. The microstructure of BZY10 is highly dependent on sample processing, leading to large discrepancy of the electrochemical performance of BZY10 in literature. In this work, three BZY10 samples were prepared by different sample processing and sintering conditions, and the grain interior (bulk) and grain boundary partial conductivities of protons and holes were separated. The sintering processes influenced the transport properties of pristine BZY10 samples significantly, and longer sintering time at high temperature (1650 – 1700 °C) leads to lower proton conductivity in both bulk and grain boundary. However interestingly, longer sintering time resulted in higher ionic transport number of bulk conduction, but lower ionic transport number of grain boundary conduction, possibly due to increasing Ba-deficiency in bulk by longer annealing at high temperature. Besides, adding ZnO into BZY10 decreased the proton conductivity in both bulk and grain boundary, but its ionic transport number of bulk conduction increases. A further analysis based on the theory of space charge layer indicated that adding ZnO leaded to decreased Schottky barrier height in the grain boundary core, and the highest Schottky barrier height was observed in the pristine sample which was sintered for longer time. The results obtained in this work suggest a potential strategy to regulate the transport properties of BZY10 by choosing appropriate approaches for sample processing to control the microstructure and local composition of the polycrystalline BZY10 ceramic electrolyte.
研究领域:
材料科学
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固体物理
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能源科学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）