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Structural optimization and performance trade-off strategies for semi-crystalline sulfonated poly(arylene ether ketone) membranes in high-concentration direct methanol fuel cells

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Journal of Energy Chemistry 2023年第10期85卷 67-75,I0004页

作者： Di Liu Yunji Xie Zhe Zhao Jinbao Li Jinhui Pang Zhenhua Jiang National&Local Joint Engineering Laboratory for Synthesis Technology of High Performance Polymer Jilin UniversityChangchun 130012JilinChina School of Chemistry and Life Science Changchun University of TechnologyChangchun 130012JilinChina

Direct methanol fuel cells(DMFCs) have attracted extensive attention as promising next-generation energy conversion devices. However, commercialized proton exchange membranes(PEMs) hardly fulfill the demand of methanol tolerance for DMFCs employing high-concentration methanol ***, we report a series of semi-crystalline poly(arylene ether ketone) PEMs with ultra-densely sulfonic-acid-functionalized pendants linked by flexible alkyl chains, namely, SL-SPEK-x(where x represents the molar ratio of the novel monomer containing multiple phenyl side chain to the bisfluoride monomers). The delicate structural design rendered SL-SPEK-x membranes with high crystallinity and well-defined nanoscale phase separation between hydrophilic and hydrophobic phases. The reinforcement from poly(ether ketone) crystals enabled membranes with inhibited dimensional variation and methanol penetration. Furthermore, microphase separation significantly enhanced proton conductivity. The SL-SPEK-12.5 membrane achieved the optimum trade-off between proton conductivity(0.182 S cm^(-1), 80 ℃), water swelling(13.6%, 80 ℃), and methanol permeability(1.6 × 10^(-7)cm~2 s^(-1)). The DMFC assembled by the SL-SPEK-12.5 membrane operated smoothly with a 10 M methanol solution, outputting a maximum power density of 158.3 mW cm^(-2), nearly twice that of Nafion 117(94.2 mW cm^(-2)). Overall, the novel structural optimization strategy provides the possibility of PEMs surviving in high-concentration methanol solutions, thus facilitating the miniaturization and portability of DMFC devices.

关键词： Semi-crystalline Ultra-densely sulfonated Flexible alkyl spacer Microscopic morphology high-concentration direct methanol fuel cell

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Carbon nanotube-hyperbranched polymer core-shell nanowires with highly accessible redox-active sites for fast-charge organic lithium batteries

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Journal of Energy Chemistry 2023年第3期78卷 30-36,I0002页

作者： Zhonghui Sun Meng Shu Jiabin Li Bing Liu Hongyan Yao Shaowei Guan Zhenhua Sun National&Local Joint Engineering Laboratory for Synthesis Technology of High Performance Polymer Key Laboratory of High Performance PlasticsMinistry of EducationCollege of ChemistryJilin UniversityChangchun 130012JilinChina Shenyang National Laboratory for Materials Science Institute of Metal ResearchChinese Academy of SciencesShenyang 110016LiaoningChina

Organic electrode materials are promising for lithium-ion batteries(LIBs) because of their environmental friendliness and structural ***,they always suffer from limited capacity,poor cycling stability,and rate ***,hexaazatrinaphthalene-based azo-linked hyperbranched polymer(HAHP) is designed and synthesized as a cathode for ***,the densely stacked morphology lowers the chance of the active sites participating in the redox *** address this issue,the singlewalled carbon nanotube(SWCNT) template is used to induce the growth of nanosized HAHP on the surface of *** HAHP@SWCNT nanocomposites have porous structures and highly accessible active ***,the strong π-π interaction between HAHP and highly conductive SWCNTs effectively endows the HAHP@SWCNT nanocomposites with improved cycling stability and fast charge-discharge *** a result,the HAHP@SWCNT nanocomposite cathode shows a high specific capacity(320.4 mA h g^(-1)at 100 mA g^(-1)),excellent cycling stability(800 cycles;290 mA h g^(-1)at 100 mA g^(-1),capacity retained 91%) and outstanding rate performance(235 mA h g^(-1)at 2000 mA g^(-1),76% capacity retention versus 50 mA g^(-1)).This work provides a strategy to combine the macromolecular structural design and micromorphology control of electrode materials for obtaining organic polymer cathodes for high-performance LIBs.

关键词： Organic electrode Organic lithium batteries Core-shell nanowire Hexaazatrinaphthylene polymer electrode materials

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Space Charge Improved Poly(Aryl Ether Sulfone)Composite Membrane for Osmotic Energy Conversion

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Chinese Journal of Chemistry 2025年第7期43卷 814-822页

作者： Jundong Zhong Hongyan Qi Tingting Xu Weibo Sun Zhe Zhao Haibo Zhang Xuanbo Zhu Zhenhua Jiang National and Local Joint Engineering Laboratory for Synthetic Technology of High-Performance Polymer College of ChemistryJilin UniversityChangchunJilin 130012China

The ion-selective porous membrane is the key component in osmotic energy conversion,and optimizing its permeability and selectivity is crucial for improving output ***,to construct a permeability and selectivity synergistically enhanced osmotic energy generator,the surface and space charge synergistically enhanced 3D composite membrane is prepared by inserting sulfonated hydrogels into the 3D ion channels with tunable surface *** membrane's selectivity is improved from 0.66 to 0.94 by increasing the charge density on the membrane surface and the spatial charge density of the *** experimental and simulation results showed that the synergistic enhancement of the spatial and surface charges significantly improved the electrostatic interactions between the ions and the ion channels,which led to the enhancement of selectivity,net ionic fluxes,and output *** space charge improved composite membrane presents an advanced power density of about 6.4 W·m^(-2) under a 50-fold concentration gradient,which is nearly 2 times that of the phase inversion membrane without *** study provides a promising solution for constructing high-performance osmotic energy generators.

关键词： Ion transport Blue energy generator Space charge Hydrogel Phase inversion membrane Energy conversion Ion channels Phaseseparation

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Fast-Developing Dynamic Radiative Thermal Management:Full-Scale Fundamentals,Switching Methods,Applications,and Challenges

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Nano-Micro Letters 2025年第6期17卷 427-465页

作者： Long Xie Xuechuan Wang Yageng Bai Xiaoliang Zou Xinhua Liu College of Chemistry and Chemical Engineering Institute of Biomass&Functional MaterialsShaanxi University of Science&TechnologyXi’an 710021People’s Republic of China College of Bioresources Chemical and Materials Engineering Institute of Biomass&Functional MaterialsShaanxi University of Science&TechnologyXi’an 710021People’s Republic of China Key Laboratory of High Performance Plastics National&Local Joint Engineering Laboratory for Synthesis Technology of High Performance PolymerMinistry of EducationCollege of ChemistryJilin UniversityChangchun 130012People’s Republic of China

Rapid population growth in recent decades has intensified both the global energy crisis and the challenges posed by climate change,including global ***,the increased frequency of extreme weather events and large fluctuations in ambient temperature disrupt thermal comfort and negatively impact health,driving a growing dependence on cooling and heating energy ***,efficient thermal management has become a central focus of energy *** thermal management systems consume substantial energy,further contributing to greenhouse gas *** contrast,emergent radiant thermal management technologies that rely on renewable energy have been proposed as sustainable ***,achieving year-round thermal management without additional energy input remains a formidable ***,dynamic radiative thermal management technologies have emerged as the most promising solution,offering the potential for energy-efficient adaptation across seasonal *** review systematically presents recent advancements in dynamic radiative thermal management,covering fundamental principles,switching mechanisms,primary materials,and application ***,the key challenges hindering the broader adoption of dynamic radiative thermal management technologies are *** highlighting their transformative potential,this review provides insights into the design and industrial scalability of these innovations,with the ultimate aim of promoting renewable energy integration in thermal management applications.

关键词： Thermal comfort Radiant thermal management Dynamic radiative thermal management Renewable energy

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Dipolar Glass polymers for Capacitive Energy Storage at Room Temperatures and Elevated Temperatures

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Chinese Journal of polymer Science 2022年第7期40卷 711-725页

作者： Wen-Han Xu Ya-Dong Tang Hong-Yan Yao Yun-He Zhang National and Local Joint Engineering Laboratory for Synthetic Technology of High-Performance Polymer Jilin UniversityChangchun130012China

Dielectric polymers are the materials of choice for high energy density film *** increasing demand for advanced electrical systems requires dielectric polymers to operate efficiently under extreme conditions,especially at elevated ***,the low permittivity and relatively low operating temperature of dielectric polymers limit the high-temperature capacitive energy storage ***,dipolar glass polymers are demonstrated as the preferred materials to achieve high dielectric constant,low dielectric loss and high energy density at elevated *** this review,we critically elaborate on the recent progress of dipolar glass polymers based on orientational polarization from molecular *** addition,the general design considerations and various dipole moment entities of dipolar glass polymers are described in *** dipolar moment,high dipole density and rotation freedom of dipoles are essential for dipolar glass polymers to gain superior dielectric and energy storage *** and future opportunities for dipolar glass polymers towards high-temperature energy storage applications are also provided.

关键词： Dipolar glass polymers Orientational polarization Capacitive energy storage Dielectric constant high-temperature

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Towards high performance polyimide cathode materials for lithium–organic batteries by regulating active-site density,accessibility,and reactivity

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eScience 2024年第4期4卷 110-119页

作者： Jun Wang Haichao Liu Chunya Du Bing Liu Haoran Guan Yu Liu Shaowei Guan Zhenhua Sun Hongyan Yao National&Local Joint Engineering Laboratory for Synthesis Technology of High Performance Polymer Key Laboratory of High Performance PlasticsMinistry of EducationCollege of ChemistryJilin UniversityChangchun 130012China State Key Lab of Supramolecular Structure and Materials Jilin UniversityChangchun 130012China Shenyang National Laboratory for Materials Science Institute of Metal Research Chinese Academy of SciencesShenyang 110016China College of Sciences Shenyang University of Chemical TechnologyShenyang 110142China

Organic carbonyl electrode materials offer promising prospects for future energy storage systems due to their high theoretical capacity,resource sustainability,and structural *** much progress has been made in the research of high-performance carbonyl electrode materials,systematic and in-depth studies on the underlying factors affecting their electrochemical properties are rather ***,five polyimides containing different types of diamine linkers are designed and synthesized as cathode materials for Li-ion ***,the incorporation of carbonyl groups increases the active-site density in both conjugated and non-conjugated ***,increased molecular rigidity can improve the accessibility of the active ***,the introduction of the conjugated structure between two carbonyl groups can increase the reactivity of the active ***,the incorporation of carbonyl structures and conjugated structures increases the capacity of ***,PAN,PMN,PSN,and PBN exhibit 212,198,199,151,and 115mAh g^(−1)at 50mAg^(−1),*** addition,the introduction of a carbonyl structure and a conjugated structure is also beneficial for improving cycling stability and rate *** work can deepen the understanding of the structure–function relationship for the rational design of polyimide electrode materials and can be extended to the molecular design of other organic cathode materials.

关键词： Organic cathode materials polymer electrode Lithium-ion batteries Carbonyl Polyimides

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Synergic strength-ductility enhancement in bimodal titanium alloy via a heterogeneous structure induced by theslip

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Journal of Materials Science & technology 2025年第1期204卷 255-267页

作者： Tingyi Lin Lei Zhou Yingfei Guo Pingwei Xu Yusong Li Jiaxun Zhang Yilong Liang Yu Liang College of Materials and Metallurgy Guizhou UniversityGuiyang 550025China Guizhou Key Laboratory for Mechanical Behavior and Microstructure of Materials Guizhou UniversityGuiyang 550025China National&Local Joint Engineering Laboratory for High-Performance Metal Structure Material and Advanced Manufacturing Technology Guiyang 550025China Engineering Training Center Guizhou Institute of TechnologyGuiyang 550003China

In this work,a heterogeneous structure(HS)with an alternating distribution of coarse and fineαlamella is fabricated in bimodal Ti6242 alloy via insufficient diffusion of alloying elements induced by fast heat-ing *** of a distinct interface between the primaryα_(p)hase(α_(p))andβ_(t)ransformation microstructure(β_(t))in the equiaxed microstructure(EM),allα_(p)/β_(t)interfaces are eliminated in the HS,and the largeα_(p)phases are replaced by coarseα*** to the EM alloy,the heterostruc-tured alloy exhibits a superior strength-ductility *** enhanced strength is predominantly attributed to the increased interfaces ofα/βplates and hetero-deformation induced(HDI)strengthening caused by back ***,good ductility is ascribed to its uniform distribution of coarse and fineαlamella,which effectively inhibits strain localization and generates an extra HDI *** can be evidenced by the accumulated geometrically necessary dislocations(GNDs)induced by strain partitioning of the ***,the HDI causes extradislocations piling up in the coarseαlamella,which generates an extra strain hardening to further improve the *** hetero-interface coordinated deformation mechanism sheds light on a new perspective for tailoring bimodal titanium al-loys with excellent mechanical properties.

关键词： Bimodal Ti6242 alloy Heterogeneous structure Tensile properties dislocation

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Improving corrosion resistance of Zn-5Al(wt%)alloy by microalloying with samarium

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Journal of Rare Earths 2023年第10期41卷 1636-1644,I0006页

作者： Xiaochao Zhou Wei Shi Song Xiang College of Materials and Metallurgy Guizhou UniversityGuiyang550025China Key Laboratory for Mechanical Behavior and Microstructure of Materials of Guizhou Province Guiyang550025China National&Local Joint Engineering Laboratory for High-Performance Metal Structure Material and Advanced Manufacturing Technology Guiyang550025China

The role of the rare earth element Sm in as-cast Zn-5AI alloy was studied in this work.A three times higher improvement than the control group on corrosion resistance was found with rare earth Sm adding(0.15 wt%).By using an electron prove micro analyzer(EPMA),focused ion beam(FIB)and scanning Kelvin probe force microscopy(SKPFM)techniques,two main mechanisms of the premium performance of the Sm adding were *** was that the non-uniform nucleation and component undercooling induced by Sm adding,reduced theα-AI layer spacing thus improved the covering efficiency of the Al_(2)O_(3)*** other was that the dissolved Sm in the Zn/Al eutectic structure modulated the electron work function thus induced the attenuation of Volta potential *** experimental results show that when the addition of Sm is 0.15 wt%,the minimum Volta potential difference betweenα-AI andη-Zn phases is achieved,and excessive or deficient Sm addition will increase the Volta potential difference.

关键词： Zn-5Al Sm Rare earth elements SKPFM Volta potential

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Bioinspired natural fibers-derived wearable thermochromic materials for all-season self-adapting thermal management

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Journal of Energy Chemistry 2025年第5期104卷 628-643页

作者： Long Xie Xuechuan Wang Yageng Bai Xiaoliang Zou Shuang Liang Chao Wei Yi Zhou Zhongxue Bai Ouyang Yue Junling Guo Xinhua Liu College of Chemistry and Chemical Engineering Institute of Biomass&Functional MaterialsShaanxi University of Science&TechnologyXi’an 710021ShaanxiChina College of Bioresources Chemical and Materials Engineering Institute of Biomass&Functional MaterialsShaanxi University of Science&TechnologyXi’an 710021ShaanxiChina Key Laboratory of High Performance Plastics Ministry of EducationNational&Local Joint Engineering Laboratory for Synthesis Technology of High Performance PolymerCollege of ChemistryJilin UniversityChangchun 130012JilinChina BMI Center for Biomass Materials and Nanointerfaces College of Biomass Science and EngineeringSichuan UniversityChengdu 610065SichuanChina Bioproducts Institute Departments of Chemical&Biological Engineering2360 East MallThe University of British ColumbiaVancouverBC V6T 1Z4Canada

Global warming and energy crisis are two major challenges in the *** materials that enable all-seasonal self-adapting thermal comfort without additional energy-input attract significant attention as a solution to the increasing severity of extreme *** by autologous temperature-regulation and multidimensional-sensing origins of nature-skin composed of nature collagen fibers,this study engineered a nanoscale wearable natural fibers-derived thermochromic material(TMEH-skin)for robust all-season self-adapting thermal management by tactically integrating traditional immersion and spraying methods with layer-by-layer *** of the on-demand multi-functional layer-structure design,TMEH-skin achieves spontaneous~38.16%visible lightmodulation and~95.1%infrared-emission,demonstrating outstanding double-self-switching thermal management origins by simple color-changing without additional ***,TMEH-skin has gratifying tensile strength of 13.18 MPa,water vapor permeability,electrical-conductivity,and hydrophobicity,further broadening the application potential and scenarios as wearable *** applications for military-missions or reconnaissance behind enemy-lines,TMEH-skin robustly integrates the multi-functionalities of wearing-comfort,physiological signal-response capability for accurate transmission of Morse-code,and thermal management performances under special circumstances,indicating its tremendous potential for smart *** results show that TMEH-skin has prominent energy-saving efficiency in cities with different climate *** study provides a new reference to the booming innovation of natural-derived wearable materials for all-seasonal self-adapting thermal management.

关键词： Nature-skin Collagen fibers Self-adapting thermal management Wearable Multi-functionalities

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Permeability and selectivity synergistically enhanced nanofluidic membrane for osmotic energy harvesting

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Carbon Energy 2024年第8期6卷 14-24页

作者： Jundong Zhong Tingting Xu Hongyan Qi Weibo Sun Shuang Zhao Zhe Zhao Yirong Sun Youliang Zhu Jianxin Mu Haibo Zhang Xuanbo Zhu Zhenhua Jiang Lei Jiang National and Local Joint Engineering Laboratory for Synthetic Technology of High‐Performance Polymer Jilin UniversityChangchunJilinChina State Key Laboratory of Supramolecular Structure and Materials Jilin UniversityChangchunJilinChina Key Laboratory for Molecular Enzymology and Engineering of Ministry of Education Jilin UniversityChangchunJilinChina CAS Key Laboratory of Bio‐inspired Materials and Interfacial Science Technical Institute of Physics and ChemistryChinese Academy of SciencesBeijingChina

For the porous‐membrane‐based osmotic energy generator,the potential synergistic enhancement mechanism of various key parameters is still controversial,especially because optimizing the trade‐off between permeability and selectivity is still a ***,to construct a permeability and selectivity synergistically enhanced osmotic energy generator,the twodimensional porous membranes with tunable charge density are prepared by inserting sulfonated polyether sulfone into graphene *** of charge density and pore size on the ion transport are explored,and the ionic behaviors in the channel are calculated by numerical *** mechanism of ion transport in the process is studied in depth,and the fundamental principles of energy conversion are *** results demonstrate that charge density and pore size should be matched to construct the optimal ion *** collaborative enhancement strategy of permeability and selectivity has significantly improved the output power in osmotic energy generation;compared to the pure graphene oxide membrane,the composite membrane presents almost 20 times improvement.

关键词： blue energy generator charge tunable graphene oxide ion transport layered nanocomposites

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