JOURNAL OF MEMBRANE SCIENCE
·
2022
·
IF 10.53
Song Wang,Zhe Wang,Jingmei Xu,Qian Liu,Zhiyan Sui,Xinming Du,Yinghe Cui,Yongjiang Yuan,Junjian Yu,Yan Wang,Yifang Chang
A bead-on-string electrospinning strategy is proposed to solve the dilemma of unstable conduction channel while improving the OH − conductivity of anion exchange membranes (AEMs). Here, poly (aryl ether ketone)-based AEMs are synthesized via N-spirocyclic quaternary ammonium modification, and then processed by electrospinning and sparingly soluble techniques. N-spirocyclic cations are induced to orient during electrospinning, as evidenced by the long-range ordered aggregation of ion clusters through EDX . Therefore, the electrospun membrane exhibits significantly higher conductivity (74 mS cm −1 at 80 °C) and alkaline stability, the conductivity remains above 97% after being kept in a solution of 2 mol/L KOH at 80 °C for 720 h. The swelling of the beaded membrane is only 12%, and the tensile strength is about 24.9 MPa. This work provides a simple and effective method to densify nanofiber mats.
研究领域:
材料科学
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能源工程
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2024
·
IF 10.7
Wenli Ma,Jianming Bai,Qingzhi Zhang,Lin Tian,Fanghui Wang,Hong Zhu
Anion exchange membrane water electrolysis (AEMWE) with low cost and high electrolysis efficiency is an emerging technology for large-scale hydrogen production. High-performance anion exchange membranes (AEMs) are crucial for the commercialization of AEMWE. In this work, four hydrophilic and hydrophobic di-piperidine crosslinked membranes were prepared and tested. The combination of cationic side chains and hydrophilic oxygenated cross-linkers facilitates the construction of efficient and continuous ion transport channels, reducing resistance and enhancing the alkaline stability of AEMs. With cationic side chains and hydrophilic flexible di-piperidine crosslinkers, the PTP-N-QABIEP membrane exhibits high ionic conductivity (151.7 mS cm−1 at 80 °C), good dimensional stability (WU 118.4% and SR 20.2% at 80 °C) and excellent alkaline stability (2 M NaOH > 2300 h at 80 °C). Meanwhile, satisfactory AEMWE performance was demonstrated in 1 M KOH (2.14 A cm−2 and 2.2 V at 60 °C) and pure water (0.600 A cm−2 and 2.2 V at 60 °C), respectively, while there was also a low voltage decay (0.542 mV h−1) after 240 h of operation in 1 M KOH at 500 mA cm−2 and 60 °C. Therefore, the PTP-N-QABIEP membrane with relatively excellent comprehensive performance shows favorable prospects for AEMWE applications in 1 M KOH or pure water.
研究领域:
材料科学
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能源技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2024
·
IF 8.4
Haicun Yang,Xudong Ma,Wenzhong Ma,Mingyue Shi,Jinglong Zhang,Yu Jiang,Zheng Cao,Fanghong Gong,Ji Pan
The current anion exchange membranes (AEMs) face the “trade-off” between conductivity and alkali resistance. Here, a new strategy integrating controlled radical polymerization, click chemistry, and magnetic field orientation was proposed to establish widened short-range ion transport channels for improving both the conductivity and stability of AEM. Poly[1,2-dimethyl-3-(4-vinylbenzyl)imidazolium chloride] (PImIL) containing imidazolium cations were grafted from poly(2,6-dimethyl-1,4-phenylene oxide) (PPO) and magnetic carbon nanotubes (M-CNTs) via ARGET ATRP and RAFT polymerization to synthesize the comb-shaped PPO-PImIL and hybrid M-CNTs@PImIL, respectively. Then, an external magnetic field assists in establishing ionized organic-inorganic hybrid co-crosslinked networks with widened short-range ion transport channels via a click reaction, which endows the hybrid AEM with excellent conductivity, dimensional stability, and mechanical strength. The magnetic-field-oriented hybrid AEM, with 5 wt% M-CNTs@PImIL doping and an ion exchange capacity (IEC) of 2.81 mmol/g, exhibits an ionic conductivity of 195.8 mS/cm at 80 °C, which is 2.5 times that of PPO-PImIL. Meanwhile, the enhanced interfacial compatibility and co-crosslinked networks also endow the hybrid AEM with acceptable tensile strength (22.8 MPa) and sufficient thermal stability (higher than 200 °C). Combined with the steric hindrance offered by CNTs and hydrophobic alkyl chain spacers for cationic groups, the alkaline stability is also improved. Ultimately, this hybrid AEM demonstrates outstanding fuel cell performance, achieving a maximum power density of about 654.6 mW/cm 2 and exhibiting desirable durability with a voltage decay rate of 0.30 mV/h. In summary, this work provides a novel and effective strategy to prepare AEM with excellent overall performance for the application in AEMFCs.
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
eLife
·
2024
·
IF 6.4
Jierui Qin,Tingting Yang,Kexin Li,Ting Liu,Wei Zhang
As the early step of food ingestion, the swallow is under rigorous sensorimotor control. Nevertheless, the mechanisms underlying swallow control at a molecular and circuitry level remain largely unknown. Here, we find that mutation of the mechanotransduction channel genes nompC, Tmc, or piezo impairs the regular pumping rhythm of the cibarium during feeding of the fruit fly Drosophila melanogaster. A group of multi-dendritic mechanosensory neurons, which co-express the three channels, wrap the cibarium and are crucial for coordinating the filling and emptying of the cibarium. Inhibition of them causes difficulty in food emptying in the cibarium, while their activation leads to difficulty in cibarium filling. Synaptic and functional connections are detected between the pharyngeal mechanosensory neurons and the motor circuit that controls swallow. This study elucidates the role of mechanosensation in swallow, and provides insights for a better understanding of the neural basis of food swallow.
研究领域:
神经生物学
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分子生物学
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2025
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IF 9.7
Jian Gao,Jialin Zhao,Shiyao Sun,Yijia Lei,Na Li,Jingyi Wu,Qianlong Wang,Yifang Chang,Jiayao Yang,Zhe Wang
Hydroxide exchange membranes (HEMs) are important materials for energy conversion devices in hydroxide exchange membrane fuel cells (HEMFCs). This study details a series of multi-directional branched HEMs containing octaphenylcyclotetrasiloxane (OCSi). The OCSi structure allows for the establishment of continuous OH − conducting channels within the membrane while addressing the prevailing trade-off between ionic conductivity and size/mechanical stability. Thanks to the formation of fine microphase-separated morphologies, the quaternized poly(octaphenylcyclotetrasiloxane-terphenyl-piperidinium) (QPOCSi-TP-2) membrane has high conductivity (152.9 mS cm −1 at 80 °C), excellent mechanical stability (tensile strength of 76.5 MPa) and outstanding chemical stability (1500 h in 5 M NaOH at 80 °C). In H 2 /O 2 cell tests at 80 °C, the peak power density of the QPOCSi-TP-2 membrane reaches 1.26 W cm −2 . During 120 h of operation at 100 m A cm −2 , the voltage degradation rate of the cell is 1.02 mV h −1 .
研究领域:
材料科学
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能源科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF MEMBRANE SCIENCE
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2020
·
IF 7.183
Hang Wang,Nanan Sun,Xianlin Xu,Shubo Wang,Weimin Kang,Xupin Zhuang,Yan Yin,Bowen Cheng
Proton transport plays an important role in electrochemical reactions and biological processes. In this study, bioinspired proton conducting channels are designed for high-efficiency proton exchange membranes (PEMs) by immobilizing adenosine triphosphate (ATP) on graphene oxide (GO) nanosheets to form ordered ATP@GO laminates in Nafion through electrostatic layer-by-layer deposition of their blended solution. The composite membrane (Nafion/ATP@GO) demonstrates low methanol permeability of 2.04 × 10 −7 cm 2 s −1 , and high proton conductivity (reaches 0.345 S cm −1 at 80 °C/100% relative humidity (RH) and 0.221 S cm −1 at 140 °C/50% RH) because of the orderly lamellar structure and ATP molecular structure, thereby enhancing the performance of direct methanol fuel cell with power density of 406.35 mW cm −2 at 80 °C and 100% RH. The proposed ATP channel strategy serves as reference in developing next-generation high-performance PEMs for fuel cells.
研究领域:
材料科学
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生物工程
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产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
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2018
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IF 6.578
Yu Pan,Qidong Zhang,Xiaoming Yan,Jiafei Liu,Xiaowei Xu,Tingyun Wang,Issam El Hamouti,Xuehua Ruan,Ce Hao,Gaohong He
A high performance of anion exchange membranes (AEMs) is highly demanded in anion exchange membrane fuel cells (AEMFCs) and has been extensively studied. However, the poor ionic conductivities and the alkaline stability might limit their applications. Herein, we developed a novel strategy to improve the ionic conductivity and alkaline stability of AEMs by introducing hydrophilic oligo(ethylene glycol)(OEG) groups. Continuous ion-conducting channels were efficiently formed thanks to the dynamic aggregation of water molecules assisted by the hydrophilic side chains. The resultant AEMs with low IEC values showed significant enhancement in hydroxide conductivity compared to the AEMs functionalized by the conventional 1,2-dimethylimidazolium (PSf-Im), as the hydroxide conductivity of PSf-2 membrane with an IEC of 1.05 mmol g −1 was 59.5 mS·cm −1 at 60 °C while the hydroxide conductivity of PSf-Im membrane with an IEC of 1.27 mmol g −1 was 36.7 mS·cm −1 . In addition, the alkaline stability and the mechanical properties of the resultant AEMs were improved remarkably. The density functional theory (DFT) study showed that the introduction of OEG part can significantly increase the LUMO energy of functional group and then enhance the alkaline stability.
研究领域:
材料科学
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化学工程
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能源技术
✓ 已验证
产品关联
DOI
高影响因子
CRYSTENGCOMM
·
2024
·Vol. 26
·期 45
·6403-6409
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IF 2.6
Ting Liang,Jiwen Zhou,Junjie Ren,Shuai Tan
Developing high-performance electrolytes combining high efficiency and durability remains challenging for energy devices. Herein, lyotropic liquid crystal (LLC) electrolytes (Brij58-LLCn) were designed for quasi-solid-state dye-sensitized solar cells (DSSCs) based on commercially available polyethylene glycol-20-hexadecyl ether (Brij58) in combination with different weight contents (30%, 40%, and 50%) of a liquid electrolyte (LE). The liquid crystal behavior, molecular arrangement, electrochemical performance, and DSSC performance of Brij58-LLCn were investigated. Self-assembly of Brij58 and a LE formed a lamellar phase with a focal conic texture. The LE was concentrated to construct layered conducting channels and these channels were expanded by increasing the LE, which was beneficial for charge transfer. The best ionic conductivity of 9.01 mS cm−1 was achieved by Brij58-LLC50. DSSCs containing Brij58-LLCn exhibited promising photovoltaic performance and satisfactory thermal stability. The introduction of commercial Brij58 has extended the path of constructing ‘liquid’ channels in lyotropic liquid crystals for enhancing the performance of energy devices, which provides new ideas for the development of electrolytes in advanced energy devices.
研究领域:
材料科学
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能源技术
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产品关联
DOI
高影响因子
CHEMISTRY-A EUROPEAN JOURNAL
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2017
·Vol. 23
·期 49
·11881-11890
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IF 5.317
Qing Xuan Shi,Qing Xia,Xiao Xiang,Yun Sheng Ye,Hai Yan Peng,Zhi Gang Xue,Xiao Lin Xie,Yiu-Wing Mai
Graphical A 3D self-assembled polymeric ionic liquid (PIL)-functionalized cellulose nano-crystals confining ILs in surface-grafted PIL brushes, able to form colloidal crystal polymer electrolytes (CCPE), is prepared that can be employed for high performance Li-ion battery. CCPE have exceptional ionic conductivities, low activation energies, high Li + transport numbers, low interface resistances, improved interface compatibilities, good electrochemical properties and a good battery performance. Composite polymeric and ionic liquid (IL) electrolytes are some of the most promising electrolyte systems for safer battery technology. Although much effort has been directed towards enhancing the transport properties of polymer electrolytes (PEs) through nanoscopic modification by incorporating nano-fillers, it is still difficult to construct ideal ion conducting networks. Here, a novel class of three-dimensional self-assembled polymeric ionic liquid (PIL)-functionalized cellulose nano-crystals (CNC) confining ILs in surface-grafted PIL polymer chains, able to form colloidal crystal polymer electrolytes (CCPE), is reported. The high-strength CNC nano-fibers, decorated with PIL polymer chains, can spontaneously form three-dimensional interpenetrating nano-network scaffolds capable of supporting electrolytes with continuously connected ion conducting networks with IL being concentrated in conducting domains. These new CCPE have exceptional ionic conductivities, low activation energies (close to bulk IL electrolyte with dissolved Li salt), high Li + transport numbers, low interface resistances and improved interface compatibilities. Furthermore, the CCPE displays good electrochemical properties and a good battery performance. This approach offers a route to leak-free, non-flammable and high ionic conductivity solid-state PE in energy conversion devices.
研究领域:
材料科学
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能源技术
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2023
·
IF 6.2
Wen-Min Zhong,Xin-Gui Tang,Ling-Ling Bai,Jia-Ying Chen,Hua-Feng Dong,Qi-Jun Sun,Yan-Ping Jiang,Qiu-Xiang Liu
Artificial synapse is basic electronic components used to prepare neuromorphic hardware with integrated storage and computing, high speed and low energy consumption. This work reports an artificial synapse based on perovskite diodes with learning, memory and computing functions. The artificial synapse demonstrates a mechanism for the dual roles of depletion layer width modulation and ion conduction channel, enabling it to complete the calculation task of neural network and memorize data. Artificial synapses are modeled with various neural networks, including single-layer neural networks, deep neural networks, and convolutional neural networks. The results show that artificial synapses show good recognition accuracy for the MNIST dataset. Especially on the convolutional neural network, only relying on more than 3000 parameters has achieved an accuracy rate of 92.4 %.
研究领域:
材料科学
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类脑计算
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电子器件
✓ 已验证
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2025
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IF 9
Shuhao Lin,Xin Liu,Kenan Xu,Kaiwen Wang,Nana Chang,Yixing Wang,Kang Huang,Weihong Xing,Zhi Xu
Alkaline zinc-based flow batteries (AZFBs) have emerged as a promising candidate for large-scale energy storage due to their low cost and high energy density. However, the pursuit of high power density in AZFBs has been hindered by the lack of ion conductive membranes (ICMs) capable of delivering high and stable ion conduction, a challenge that has yet to be fully addressed. Herein, we designed an innovative sulfonated hollow carbon sphere (SHCS)-embedded ICM designed specifically for AZFBs. By combining a hydrophilic polymer with SHCS, the membrane achieved exceptional ion conductivity through dual ion conduction channels. The sulfonic acid groups on SHCS and the polymer side chains created interconnected water networks, enabling efficient ion transport. Additionally, hollow structure and alkali resistance of SHCS provided stable ion pathways. As a result, the proposed membrane exhibited a superior OH − conductivity of 10.28 mS cm −1 , surpassing the pure polymer membrane (4.69 mS cm −1 ). In AZFB tests, it achieved an 88.9 % voltage efficiency at 80 mA cm −2 and operated for over 1570 cycles (1130 h). This work offers a breakthrough in designing high-performance ICMs, advancing high power density AZFBs for energy storage.
研究领域:
材料科学
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能源存储技术
✓ 已验证
产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2022
·
IF 7.336
Geng Cheng,Zhen Li,Erli Qu,Shan Ren,Dongmei Han,Min Xiao,Shuanjin Wang,Yuezhong Meng
It's of significant importance for the development of proton exchange membranes with low phosphoric acid (PA) uptake, high proton conductivity, better proton conduction stability and low production-costs for high temperature proton exchange membrane fuel cells (HT-PEMFCs). Featured with variable structure and diversified functionality, porous organic networks are newly emerged filler materials for polyelectrolytes in energy conversion field. In this work, a typical Schiff-base type porous polymeric network (SNW-1) with abundant N H sites was synthesized and blended with ether-type polybenzimidazole (PBI) for the first time. The thermal and chemical stability of the as-prepared composite membranes completely satisfy the practical requirements of HT-PEMFCs. The constructed consecutive proton conduction channels endow the composite membranes higher proton conductivity with low PA uptake. When the doping content of SNW-1 reached 30%, the PBI/30%-SNW-1 membrane showed much higher proton conductivity with lower PA uptake (114.0 mS cm −1 , 175.0%) comparing with those of the pristine PBI (67.3 mS cm −1 , 270.0%) at 160 °C. The PBI/ x %-SNW-1 membranes also exhibited better proton conduction stability. After 30 h of long-time evaluation at 140 °C, PBI/30%-SNW-1 composite membrane gives only an 8.47% decay of proton conductivity, which is lower than that of the pristine PBI (12.84%). The preparation procedure of PBI/ x %-SNW-1 composite membranes is simple, which provides a potential pathway for the development of high-performance proton exchange membrane for HT-PEMFCs.
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
危险品化学品经营许可证（带存储）