Article
Nanoscience & Nanotechnology
Ryan Kingsbury, Maruti Hegde, Jingbo Wang, Ahmet Kusoglu, Wei You, Orlando Coronell
Summary: In this study, we successfully synthesized a series of anion exchange membranes containing non-covalent cross-links formed by a hydrogen bond donor and acceptor. These monomers act synergistically to improve both membrane permselectivity and conductivity, and can be used to tune these properties relatively independently of each other, escaping the tradeoff observed in conventional membranes.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Engineering, Chemical
Wanjie Song, Xian Liang, Yang Zhang, Yanran Zhu, Fan Zhang, Yuxia Bai, Ming Li, Huaqing Zhang, Chengpeng Wei, Xiang Liu, Liang Wu, Xiaolin GE, Tongwen Xu
Summary: This study reports an AEM with a urea-based structure that exhibits excellent performance under low humidity conditions. Micro-structure analysis and molecular dynamics simulation show that hydrogen bonding between urea-based structures enhances the self-assembly ability and OH- conduction pathway of the AEM. The hydrogen bond network formed by urea-urea and urea-water groups endows the AEM with excellent water retention ability, reducing the dependence of OH- conduction on humidity. The research provides significant guidance for rapid start-up in AEM fuel cells.
JOURNAL OF MEMBRANE SCIENCE
(2022)
Article
Chemistry, Physical
Tommaso Caielli, Alessandro Raffaele Ferrari, Simone Bonizzoni, Eva Sediva, Angela Capri, Mariarita Santoro, Irene Gatto, Vincenzo Baglio, Piercarlo Mustarelli
Summary: Water electrolyzers based on anion exchange membranes (AEMs) with poly(aryl piperidiniums) (PAPs) show promise for reducing the capital costs of green hydrogen production. Through optimized polymerization parameters, mechanically resistant PAP-based membranes with a thickness of 15 μm were obtained, exhibiting an impressive conductivity of 185 mS cm-1 and excellent stability in 1 M KOH solution at 80°C. These membranes outperformed a commercially available PAP-based membrane in an electrolyzer cell, demonstrating their potential as low-cost AEMs with easy synthesis.
JOURNAL OF POWER SOURCES
(2023)
Article
Nanoscience & Nanotechnology
Toshinori Tsuru, Kazuki Yamamoto, Dian Zhang, Masakoto Kanezashi, Takahiro Gunji, Yohei Adachi, Joji Ohshita
Summary: In this study, a membrane material with an organically bridged polysilsesquioxane structure was successfully synthesized through copolymerization. The results showed that the introduction of hydroxyethylurea groups significantly improved the water permeability of the membrane material while maintaining a high NaCl rejection rate. The enhancement in water permeability is likely attributed to the aggregation of hydroxyethylurea groups in the membrane material, forming a hydrophilic water channel.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Physical
Sun Young Kang, Ji Eun Park, Ga Young Jang, Ok-Hee Kim, Oh Joong Kwon, Yong-Hun Cho, Yung-Eun Sung
Summary: The commercialization of anion-exchange membrane water electrolysis (AEMWE) is crucial for producing low-cost and high-purity hydrogen. In this study, a high-performance and stable AEMWE was developed by using an anion-exchange membrane without an aryl-ether backbone structure. The adapted AEM exhibited improved performance and better durability compared to the conventional AEM.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Chemistry, Analytical
Ok-Hee Kim, Hee Ji Choi, Sun Young Kang, Ga Young Jang, Mohanraju Karuppannan, Ji Eun Park, Yung-Eun Sung, Oh Joong Kwon, Yong-Hun Cho
Summary: This study investigates the operating conditions and electrochemical environment of direct urea fuel cells (DUFCs) and finds the optimal conditions for achieving maximum performance. The findings have potential implications for the development of new catalysts and MEA materials.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2022)
Article
Engineering, Environmental
Di Chen, Yoo Sei Park, Fan Liu, Liyang Fang, Chuancheng Duan
Summary: This study demonstrates a novel class of hybrid perovskite materials that can serve as highly active and platinum group metal-free electrocatalysts for the oxygen evolution reaction, enabling low-cost and clean hydrogen production.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Chemical
Hae Min Kim, Chuan Hu, Ho Hyun Wang, Jong Hyeong Park, Nanjun Chen, Young Moo Lee
Summary: This study reports the use of side-chain-type s-PDTP copolymers as ionomers and membranes for anion exchange membrane fuel cells (AEMFCs). These copolymers exhibit high alkaline stability, excellent micromorphology, and high OH- conductivity. The ionomers with moderate ion-exchange-capacity and rational water uptake show optimal AEMFC performance.
JOURNAL OF MEMBRANE SCIENCE
(2022)
Article
Chemistry, Physical
Yoo Sei Park, Jaehoon Jeong, Yuseong Noh, Myeong Je Jang, Jooyoung Lee, Kyu Hwan Lee, Dong Chan Lim, Min Ho Seo, Won Bae Kim, Juchan Yang, Sung Mook Choi
Summary: A high-performance, durable non-precious metal electrocatalyst for anion exchange membrane water electrolyzers has been developed, showing improved activity and durability through alloying and oxide formation. The electrocatalyst's enhanced performance was demonstrated in single-cell and stack cell systems.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2021)
Article
Electrochemistry
Huong Doan, Ian Kendrick, Remi Blanchard, Qingying Jia, Ellie Knecht, Andrew Freeman, Tanner Jankins, Michael K. Bates, Sanjeev Mukerjee
Summary: By carefully thermal treating carbon-supported Ni nanoparticles chelated with cupferron, this study demonstrates enabled close juxtaposition of Ni-Ni-oxide surfaces, leading to improved stability and activity of the catalyst. The functionalized Ni catalyst outperforms carbon-supported Pt in AEM membrane-based hydrogen pump experiments.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2021)
Article
Chemistry, Physical
Phan Khanh Thinh Nguyen, Jihyeon Kim, Young Soo Yoon, Hyon Hee Yoon, Jaehyun Hur
Summary: The performance of an anion exchange membrane-based direct urea/O2 fuel cell (AEMDUFC) was analyzed using a mathematical model. The model was verified using experimental data and showed good accuracy. The voltage losses in the electrodes were dominant at low current density, while the voltage loss in the membrane was the highest at high current density. The structural and operating parameters of the anode side were found to be important factors for improving the performance of the AEMDUFC.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Chemistry, Physical
Carlos V. M. Inocencio, Frederic Fouda-Onana, Julie Rousseau, Nadia Guignard, Teko Napporn, Claudia Morais, K. Boniface Kokoh
Summary: Cobalt molybdenum sulfide shows excellent catalytic performance and stability in an anion exchange membrane water electrolyzer.
ACS APPLIED ENERGY MATERIALS
(2022)
Article
Chemistry, Physical
Carlos V. M. Inocencio, Frederic Fouda-Onana, Julie Rousseau, Nadia Guignard, Teko Napporn, Claudia Morais, K. Boniface Kokoh
Summary: Cobalt molybdenum sulfide was evaluated as an alternative cathode catalyst for large scale hydrogen production in alkaline media. The study showed that it exhibited excellent activity and stability in alkaline media.
ACS APPLIED ENERGY MATERIALS
(2022)
Article
Polymer Science
Andrea Roggi, Elisa Guazzelli, Claudio Resta, Gabriele Agonigi, Antonio Filpi, Elisa Martinelli
Summary: In this study, a commercial SBS was modified with TEMPO stable radical to obtain g-VBC-x and g-VBC-x-co-Sty-z graft copolymers. The controlled polymerization and use of a solvent minimized the formation of non-grafted polymer, facilitating the purification of the graft copolymers. The resulting graft copolymers were then used to prepare AEMs for potential application in a water electrolyzer.
Article
Materials Science, Multidisciplinary
Mona Rouhi, Anil Incel, Sudhirkumar Shinde
Summary: This study presents a method for synthesizing a water-compatible oxyanion-imprinted neutral receptor and demonstrates its practical applications in solid-phase extraction and amino acid binding in aqueous media.
ACS APPLIED POLYMER MATERIALS
(2021)
Article
Engineering, Multidisciplinary
Huagao Fang, Wujin Ye, Kangjie Yang, Kai Song, Haibing Wei, Yunsheng Ding
Summary: Segregated MWCNTs/epoxy composites demonstrate a low conductive percolation threshold at 0.066 wt% and an EMI SE of 22 dB even with only 2 wt% loading of MWCNTs, achieving mechanical robustness and structural integrity.
COMPOSITES PART B-ENGINEERING
(2021)
Article
Chemistry, Physical
Yake Yang, Tao Jiang, Lijuan Li, Shuang Zhou, Huagao Fang, Xueliang Li, Haibing Wei, Yunsheng Ding
Summary: This study demonstrates the excellent alkaline and oxidative stabilities of poly (quinquephenylene-co-diphenylene piperidinium) (PQDP) AEMs with mechanical robustness and high ion conductivities. The PQDP membranes show high anion conductivity and stability, with a fuel cell prototype using PQDP-3 exhibiting a high peak power density.
JOURNAL OF POWER SOURCES
(2021)
Article
Materials Science, Characterization & Testing
Xuechao Wang, Haibing Wei, Hongmei Xu, Xueliang Li, Guobing Zhang, Sheng Cheng, Chenxi Wang, Gang Ruan, Yiyang Zhou, Yunsheng Ding
Summary: A repellent for rats named DC has been successfully synthesized and incorporated into EVA to endow it with rat proof property. The influence of DC on the structure and properties of EVA was systematically investigated. Results showed that DC significantly enhanced the char residue yield and facilitated the formation of char layers, improving the flame retardancy of EVA/DC compounds.
Article
Chemistry, Physical
Lijuan Li, Tao Jiang, Sheng Wang, Sheng Cheng, Xueliang Li, Haibing Wei, Yunsheng Ding
Summary: In this study, branched poly(arylene alkylene)-based ionomers were synthesized by modifying the poly(arylene alkylene) structure. The branched membranes showed lower water absorption, good swelling resistance, and comparable conductivity to the unbranched membranes. Furthermore, the branched membranes exhibited excellent alkaline durability.
ACS APPLIED ENERGY MATERIALS
(2022)
Article
Engineering, Chemical
Tao Jiang, Cheng Wu, Yiyang Zhou, Sheng Cheng, Shanzhong Yang, Haibing Wei, Yunsheng Ding, Yucheng Wu
Summary: In this study, p-quaterphenylene moiety was copolymerized into the poly(arylene alkylene)-based ionomers to improve the stability of anion conductive membranes. The results showed that the modified membranes had lower water absorption, suppressed swelling and good alkaline stability. This simple structural modification strategy can guide the molecular design of poly(arylene alkylene)-based ionomeric materials with improved membrane properties.
JOURNAL OF MEMBRANE SCIENCE
(2022)
Article
Polymer Science
Yiyang Zhou, Qiuyue Meng, Ping Wang, Haibing Wei, Pei Xu, Yunsheng Ding
Summary: Polymerized ionic liquid containing block structure (PIL) has been used to regulate the phase structure, crystallization ability, rheology behavior and mechanical properties of poly(lactide) (PLA)/poly(E-caprolactone) (PCL) blends. The addition of PIL enhances the interaction between polymer components and improves the mechanical properties of the blends. However, excessive PIL content can lead to changes in the phase structure and reduced mechanical properties of the blends.
MACROMOLECULAR RESEARCH
(2022)
Article
Engineering, Chemical
Tao Jiang, Chenxi Wang, Tao Wang, Xuechao Wang, Xiaojuan Wang, Xueliang Li, Yunsheng Ding, Haibing Wei
Summary: Anion exchange membranes (AEMs) are crucial for energy conversion technologies. Developing novel cations with good alkaline stability and ion conducting properties is essential for improving the performance of AEMs.
JOURNAL OF MEMBRANE SCIENCE
(2022)
Article
Chemistry, Physical
Tao Wang, Yu Zhao, Sheng Wang, Sheng Cheng, Shanzhong Yang, Haibing Wei, Yunsheng Ding
Summary: A major challenge in anion exchange membrane (AEM) fuel cells is the development of high-performing AEMs that meet alkaline stability, swelling resistance, and ion conductivity criteria simultaneously. Poly(biphenylene alkylene)-based membranes, specifically PBPA-6-QA, exhibit improved phase separation, suppressed water uptake, high ion conductivity, and improved alkaline stability. A single cell using PBPA-6-QA demonstrates a peak power density of 0.97 W cm-2 and remains stable at a constant current density of 0.2 A cm-2 for 90 hours without membrane degradation.
JOURNAL OF POWER SOURCES
(2023)
Article
Chemistry, Multidisciplinary
Jujia Zhang, Sian Chen, Haibing Wei, Jin Zhang, Haining Wang, Shanfu Lu, Yan Xiang
Summary: To address the stress loss and plasticization issues in polymer electrolyte membranes during startup/shutdown stages, a proton conductor confinement strategy is introduced. By precisely regulating polymer side-chain structure and defined plasticization quantitative indicator, significant refinements in membrane's conductivity, durability, and single-cell performance are achieved successfully.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Hongjun Jin, Ziyan Wu, Weilin Lin, Yinye Chen, Jingran Zhang, Ruyi Zheng, Haibing Wei, Qinghua Chen, Qingrong Qian, Jianbin Huang, Jie Zhang, Yun Yan
Summary: In this study, size-controllable tetragonal nanoprisms were formed through crystallization-directed ionic self-assembly (CDISA) by evaporating a micellar solution on solid substrates. The length and width of the nanoprisms can be easily tuned by varying the initial concentration. This precise size-control strategy is expected to provide new possibilities for designing advanced materials with size-controllable anisotropic nanostructures.
Article
Materials Science, Multidisciplinary
Yiyang Zhou, Qiuyue Meng, Ming Chen, Chenxi Wang, Tao Jiang, Jingsong Zhou, Ping Wang, Lei Xia, Yezi You, Haibing Wei, Yunsheng Ding
Summary: The effects of DIP, a compound containing a xanthate group, on radical reactions and structural evolution of EPDM were investigated. It was found that the structural evolution and long-term stability of EPDM can be achieved by controlling radical reactions during gamma-ray irradiation. The presence of DIP can prevent EPDM deterioration, with the samples containing 1 wt% DIP showing retention rates of elongation at break and tensile strength at about 90% and 160% under irradiation, compared to 33% and 70% for additive-free EPDM. Additionally, DIP can improve the oxidation resistance and maintain the thermal decomposition temperature of EPDM under irradiation.
NPJ MATERIALS DEGRADATION
(2023)
Article
Engineering, Chemical
Ruoxi Ma, Yufeng Kang, Tao Wang, Tao Jiang, Hao-yan Yin, Chao Liu, Haibing Wei, Yunsheng Ding
Summary: This article reports a simple design strategy that improves the conductivity of anion exchange membranes by modifying the backbone structure. By introducing dimethylfluorenylene units, the chain packing behavior and free volume of the membrane can be modulated. The optimized membrane, PFTPA-81, exhibits high ion conductivity, proper water absorption, and excellent alkaline stability. A fuel cell prototype made from PFTPA-81 achieved a high peak power density and demonstrated good durability.
JOURNAL OF MEMBRANE SCIENCE
(2023)
Article
Materials Science, Multidisciplinary
Tao Wang, Yu Zhao, Ruoxi Ma, Lijuan Li, Qianjun Ling, Xueliang Li, Yunsheng Ding, Haibing Wei
Summary: This study presents a design using rigid arylene units to suppress water sorption in quaternized poly(arylene alkylene) membranes. The P(4PA-co-3PA)-D100 membrane showed limited water uptake and swelling, as well as exceptional ion conductivity, due to its phase-separated morphology and immiscibility of hydrophilic and hydrophobic components.
Article
Engineering, Chemical
Yu Zhao, Yake Yang, Sheng Wang, Tao Wang, Chao Liu, Sheng Cheng, Haibing Wei, Yunsheng Ding
Summary: Constructing efficient ion transport channels in anion exchange membranes (AEMs) through morphology regulation is an effective strategy to enhance ion conductivity. In this study, a versatile design paradigm was proposed to achieve nanoscale phase separation morphologies in poly(arylene alkylene) AEMs. The AEMs exhibited excellent conductivities and ion diffusion coefficients, and a single cell assembled with the membrane showed high power density and voltage retention.
JOURNAL OF MEMBRANE SCIENCE
(2023)
Article
Chemistry, Multidisciplinary
Kai Song, Wujin Ye, Xingchen Gao, Huagao Fang, Yaqiong Zhang, Qi Zhang, Xueliang Li, Shanzhong Yang, Haibing Wei, Yunsheng Ding
Summary: The novel supramolecular polyurethane elastomers (SPUEs) developed in this study achieved mechanical robustness and highly efficient self-healing at room temperature, demonstrating the highest tensile toughness for self-healable polymers and excellent ultimate tensile strength and fracture energy.
MATERIALS HORIZONS
(2021)
Article
Polymer Science
Yuanzhang Jiang, Xuyi Wang, Yanting Han, Dakai Gong, Yingchun Gu, Lin Tan
Summary: In this study, FeCl3 and poly(acrylic acid) (PAA) were doped into waterborne polyurethanes (WPUs) to create multifunctional materials with self-healing and antimicrobial properties. WPU/Fe/PAA-5.5, containing 5.5 wt % PAA, exhibited excellent mechanical properties, strong self-healing capabilities, and an impressive antimicrobial rate of over 90%. These supramolecular films were also highly recyclable through hot-pressing.
Article
Polymer Science
Longyu Tian, Min Wang, Guangming Liao, Baoliang Liu, Sujuan Zhang, Yucheng Sun, Zhen Meng, Jintao Zhang, Zaijun Lu
Summary: Two kinds of benzoxazine monomers were synthesized and used to prepare polybenzoxazine anion exchange membranes (AEMs) with quaternary ammonium functionalization. The LQPBZ AEM exhibited better ion conductivity and alkaline stability.
Article
Polymer Science
Claire A. Lemarchand
Summary: This study investigates the shock behavior of three different polymers through molecular dynamics simulations. The results reveal specificities in the shock behavior of polymers, including deviations from the linear relation between shock velocity and particle velocity, as well as differences in shear stress relaxation behind the shock front. It is found that the deviation of the Hugoniot locus is related to the change in the relative contribution of bonding and non-bonding potential energies, while polymers with higher glass transition temperatures exhibit slower shear stress relaxation.
Article
Polymer Science
Zengquan Liu, Xiaochun Yin, He Zhang, Shuo Gao, Qinglin Kuang, Yanhong Feng
Summary: A powder solid-state extension (PSSE) technology was proposed to address the high melt viscosity issue of UHMWPE. By uniaxial extension and sintering in the solid state, a highly self-reinforced material was prepared. X-ray diffraction and scattering techniques were used to study the structural evolution during the PSSE process, and a solid-phase induced transformation model was established.
Article
Polymer Science
Zhike Li, Anyu Luo, Rui Zhou, Xin Li, Haiyan Li
Summary: A novel high temperature resistance IL@SiO2 nanocapsules were successfully prepared and their friction and wear properties in PA6 composites were studied. The addition of IL@SiO2 nanocapsules reduced the friction coefficient and wear rate without affecting the mechanical properties of PA6. The synergy between the IL core and SiO2 wall in the nanocapsules improved the self-lubricating performance of the PA6 composites.
Article
Polymer Science
Xin Liu, Xuhong Guo, Qi Liao
Summary: In this study, an algorithm for accurately estimating viscosity is developed using molecular dynamics simulations and the Green-Kubo formula. This algorithm can be applied to complex systems with long correlations, such as macromolecular and biological simulation systems.
Article
Polymer Science
Hao Pu, Yun-Lei Hou, Jing -Zhou Chen, Dong -Lin Zhao
Summary: The use of modified graphene improves the interfacial adherence of carbon fibers to epoxy resin, resulting in enhanced interfacial and bending properties of CF and matrix in CF/EP composites, as well as increased interlaminar shear strength and flexural strength.
Article
Polymer Science
Wei-Chung Ke, Jin-Wei Lin, Manohar Reddy Busireddy, Yueh-Hsing Lee, Jiun-Tai Chen, Chain-Shu Hsu
Summary: This study introduces a crosslinkable monomer, TAIC, to synthesize three crosslinked polyimide films, which exhibit improved thermal, mechanical, and dielectric properties. The introduction of TAIC enhances the tensile strength, reduces the dielectric constant and dielectric loss, and decreases the coefficient of thermal expansion of the polyimide films.
Article
Polymer Science
Alex Kwasi Kumi, Ruiling Fan, Ye Chen, Yumei Zhang
Summary: The difference in leaching of amylopectin from cellulose/amylopectin/1-butyl-3-methylimidazolium chloride ([Bmim][Cl]) blends during regeneration in water and aqueous ethanol has been studied. Molecular dynamics simulations showed that the dissolution and regeneration mechanisms of amylopectin in [Bmim][Cl] are similar to cellulose in ionic liquids. Water regeneration leads to weak electrostatic interactions, resulting in high leaching of amylopectin. In contrast, ethanol-water interactions enhance electrostatic interactions among amylopectin chains, limiting amylopectin leaching in aqueous ethanol.
Article
Polymer Science
Xi Zeng, Junwei Zhou, Junbiao Peng, Chunsheng Zhang, Danling Wang, Yihu Song, Qiang Zheng
Summary: This study utilizes an oligomer deep eutectic solvent (DES) based on polyethylene glycol to regulate the vulcanization kinetics of rubber. The results show that the DES can accelerate vulcanization at low temperatures without affecting the crosslinking density and Mullins effect.
Article
Polymer Science
Qianqian Yue, Yongfei Peng, Xingjian Liu, Aihua He, Huarong Nie
Summary: The addition of metal deactivators can effectively suppress the aging of TBIR, prolong its lifespan, and have no negative effects on its physical and processing properties. These research findings are of great importance for improving the stability and aging resistance of polymers.
Article
Polymer Science
J. Gomez-Caturla, J. Ivorra-Martinez, R. Tejada-Oliveros, V Moreno, D. Garcia-Garcia, R. Balart
Summary: This work focuses on the development of environmentally friendly PLA formulations by using different esters derived from geraniol as plasticizers. The results show that these esters have good compatibility with PLA, and they can effectively enhance the elongation and plasticity of PLA, reduce its glass transition temperature, and slightly improve its water absorption capabilities.
Article
Polymer Science
Dandan Li, Zhaohui Lu, Zhao Ke, Ke Xu, Fengna Dai, Youhai Yu, Guangtao Qian, Chunhai Chen
Summary: In this study, cross-linked PI aerogel membranes with low dielectric constant and high moisture resistance were prepared by co-polymerization and scraping coating technology. The incorporation of fluorinated blocks and benzimidazole ring structures resulted in novel PI aerogel membranes with fascinating dielectric properties and outstanding moisture resistance.
Article
Polymer Science
Zhaoyang Chu, Qing Zhang, Haihua Luo, Han Zhou, Fapei Zhang, Wei Chen, Wenhua Zhang
Summary: Multi-physical fields solution processing strategy is a universal and facile method for preparing various conjugated polymer films and high-performance devices. In this study, we employed a combined microfluidic flow and ultrasonication strategy (FU) for processing CP solutions, and found a pronounced synergetic effect in promoting the pre-ordering of chains in solution. The conformation order and anisotropy of the solution were revealed through various characterizations. A non-classical nucleation model for polymer crystallization in non-equilibrium solution processing was confirmed. The roles of microfluidic flow and ultrasonication in chain aggregation and crystallization were addressed through multi-physical simulations. Compared to pristine solutions, the FU strategy showed improved solution anisotropy and crystallization kinetics, resulting in higher crystallinity in films and increased mobilities in OFET devices. The FU processing strategy provides a universal approach for regulating chain conformation and aggregation in conjugated polymer solutions.
