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Post-tunable salt gel electrolytes toward flexible supercapacitor switches

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Journal of Energy Chemistry 2025年第1期100卷 114-124页

作者： hui Wang Shuang Chen Xuming Liu Qin zhang Xin Liu Polymeric and Soft Materials Laboratory School of Chemistry and Life Science and Advanced Institute of Materials ScienceChangchun University of TechnologyChangchun 130012JilinChina Polymeric and Soft Materials Laboratory School of Chemical Engineering and Advanced Institute of Materials ScienceChangchun University of TechnologyChangchun 130012JilinChina

Convertible hydrogel supercapacitors have emerged as promising energy storage devices in switches,diodes,and ***,inherent weaknesses in ionic conductivity,mechanical properties,and water retention of hydrogel electrolytes seriously hinder their *** by the hardness conversion of sea cucumber skin,a conductivity and mechanics dual-tunable salt gel electrolyte is successfully *** salt gel presents a reversible switching of conductors-insulators and a mechanical regulation between softness and hardness via the dissolution-crystallization transition of sodium acetate trihydrate(SAT).Meanwhile,the salt gels spontaneously grow a layer of“armor”through saturated phase-change salt crystals effectively reducing water evaporation of hydrogel ***,this phase-change soft-rigid conversion strategy will expand the capabilities of gel-based flexible supercapacitors(area capacitance:258.6 mF cm^(-2)),and the capacitance retention rate could still reach 86.9%after 3000 cycles at high ***,the salt gel supercapacitor is potentially used in over-heat alarm *** is anticipated that the strategy of conductivity and mechanics of dual-tunable salt gel would provide a new perspective on the development of energy storage devices,wearable electronics,and flexible robots.

关键词： Supercapacitors Salt gels Reversible phase transition Post-tuning Conductivity switching

Highly conductive and stable iodine doped argyrodite electrolyte for all-solid-state lithium batteries

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Journal of Energy Chemistry 2025年第1期100卷 50-58页

作者： Gaozhan Liu Jing zhang Jing Yang Jinghui Chen Xingyue Xiao Xiayin yao Ningbo Institute of Materials Technology and Engineering Chinese Academy of SciencesNingbo 315201ZhejiangChina Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China

Lithium argyrodites with high ionic conductivity and low cost are considered as one of the most prospective solid electrolytes for all-solid-state lithium ***,the poor chemical stability and compatibility with lithium metal limit their ***,Li_(5.4)PS_(4.4)Cl1.4I0.2solid electrolyte with high ionic conductivity of 11.49 m S ccm^(-1)and improved chemical stability is synthesized by iodine *** ultra-thin Li_(5.4)PS_(4.4)Cl_(1.4)I_(0.2)membrane with thickness of 10μm can be obtained by wet coating process,exhibiting a high ionic conductivity of 2.09 mS ccm^(-1)and low areal resistance of 1.17Ωcm^(-2).Moreover,iodine doping could in-situ form LiI at the lithium/electrolyte interface and improve the critical current density of Li_(5.4)PS_(4.4)Cl_(1.6)from 0.8 to 1.35 mA cm^(-2).The resultant LiCoO_(2)/Li_(5.4)PS_(4.4)Cl_(1.4)I_(0.2)/Li battery shows excellent cycling stability at 1 C,with a reversible specific capacity of 110.1 mA h g^(-1)and a retention of 80.5% after 1000 *** addition,the assembled LiCoO_(2)/Li_(5.4)PS_(4.4)Cl_(1.4)I_(0.2)membrane/Li pouch cell delivers an initial discharge capacity of 110.4 mA h g^(-1)and 80.5% capacity retention after 100 cycles.

关键词： Argyrodite electrolytes lodine doping lonic conductivity Stability All-solid-state lithium battery

AlO2: A novel two-dimensional material with a high negative Poisson's ratio for the adsorption of volatile organic compounds

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Chinese Chemical Letters 2025年第2期36卷 557-563页

作者： Xinghong Cai Qiang Yang yao Tong Lanyin Liu Wutang zhang Sam zhang Min Wang Chongqing Key Laboratory for Advanced Materials and Technologies of Clean Energies School of Materials and EnergySouthwest University BatteroTech Co. Ltd. School of Astronautics Harbin Institute of Technology Zhengzhou Research Institute Harbin Institute of Technology

We propose and investigate a novel stable two-dimensional（2D） AlO2with anomalous stoichiometric ratios based on first-principles calculation. 2D AlO2has metallic properties. It possesses the rare in-plane and out-of-plane negative Poisson's ratio（NPR） phenomenon, originating from its special sawtooth-like structure. The absolute value of the NPR decreases as the number of layers increases. The adsorption of volatile organic compounds（VOCs） including CH2O, C2H3Cl and C6H6by AlO2exhibit small adsorption distance, large adsorption energy, large charge transfer and significant density of states（DOS） changes,indicating the presence of strong interactions. The desorption time of each gas molecule on the AlO2surface is also evaluated, and the results further suggest that the desorption of VOCs can be controlled by changing the temperature to achieve the recycling of AlO2. These interesting properties make 2D AlO2a promising material for electronic, mechanical and sensing applications for VOCs.

关键词： AlO2 First-principles calculations Negative Poisson's ratio Two-dimensional material VOCs

Glycolytic dysregulation in Alzheimer's disease:unveiling new avenues for understanding pathogenesis and improving therapy

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Neural Regeneration Research 2025年第8期20卷 2264-2278页

作者： You Wu Lijie Yang Wanrong Jiang Xinyuan zhang Zhaohui yao Department of Geriatrics Renmin Hospital of Wuhan UniversityWuhanHubei ProvinceChina

Alzheimer's disease poses a significant global health challenge owing to the progressive cognitive decline of patients and absence of curative *** current therapeutic strategies,primarily based on cholinesterase inhibitors and N-methyl-Daspartate receptor antagonists,offer limited symptomatic relief without halting disease progression,highlighting an urgent need for novel research directions that address the key mechanisms underlying Alzheimer's *** studies have provided insights into the critical role of glycolysis,a fundamental energy metabolism pathway in the brain,in the pathogenesis of Alzheimer's *** in glycolytic processes within neurons and glial cells,including microglia,astrocytes,and oligodendrocytes,have been identified as significant contributors to the pathological landscape of Alzheimer's *** changes impact neuronal health and function,thus offering promising targets for therapeutic *** purpose of this review is to consolidate current knowledge on the modifications in glycolysis associated with Alzheimer's disease and explore the mechanisms by which these abnormalities contribute to disease onset and *** focus on the pathways through which glycolytic dysfunction influences Alzheimer's disease pathology should provide insights into potential therapeutic targets and strategies that pave the way for groundbreaking treatments,emphasizing the importance of understanding metabolic processes in the quest for clarification and management of Alzheimer's disease.

关键词： Alzheimer’s disease glial cells glycolysis neuronal metabolism pathogenesis therapeutic targets

Sequence-controlled dynamic covalent units enable decoupling of mechanical and self-healing performance of polymers

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Science China Chemistry 2025年第2期68卷 745-753页

作者： Luzhi zhang Hongfei Huang Lijie Sun Xiaopeng Ma hui Tan Zhengwei You Respiratory Department Shenzhen Children’s Hospital Affiliated to Shantou University Medical CollegeShenzhen 518038China State Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of Materials Science and EngineeringInstitute of Functional MaterialsResearch Base of Textile Materials for Flexible Electronics and Biomedical Applications(China Textile Engineering Society)Shanghai Key Laboratory of Lightweight CompositeShanghai Engineering Research Center of Nano-Biomaterials and Regenerative MedicineDonghua UniversityShanghai 201620China Yangtze Delta Region Institute(Huzhou) University of Electronic Science and Technology of ChinaHuzhou 313001China

Sequence regulation provides an effective approach to controlling the properties of polymer ***,this approach remains an open question in the field of dynamic polymers,which emerge as more and more important new generation ***,we systematically investigate the effect of sequence control of dynamic covalent units in tuning the properties of *** sequence-controlled poly(oxime-urethanes)are *** dynamic oxime-urethane groups are relatively dispersed(SCP-1)or concentrated(SCP-2)distributed in their molecular *** sequence control strategy provides an efficient way to decouple the mechanical and self-healing performance of polymers,which is one of the most pressing challenges in the *** relatively dispersed oxime-urethane groups in SCP-1 not only facilitate the reorganization of the dynamic covalent bonds but also increase the probability of the reformation of hydrogen *** reversible dissociation/reassociation of dynamic bonds is conducive to dissipating energy to enhance mechanical performance and promote self-healing *** a result,SCP-1 exhibits much faster self-healing than SCP-2,and its tensile strength is nearly twice that of *** addition,energy dissipation capacity and degradation behavior also show significant sequence ***,this work reveals a new molecular structure-property relationship and provides a powerful strategy to construct high-performance polymers.

关键词： sequence control dynamic polymer poly(oxime-urethane) strength polyurethane

Gradient nanostructure enabled exceptional fretting fatigue properties of Inconel 718 superalloy through submerged abrasive waterjet peening

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Chinese Journal of Aeronautics 2025年第1期38卷 586-606页

作者： Shulei yao Yuxin CHI Xianhao ZHU Kaiming zhang Tiwen LU Kaishang LI Ning WANG Chengcheng zhang Shuang LIU Xiancheng zhang Shantung TU Key Laboratory of Pressure Systems and Safety Ministry of EducationSchool of Mechanical and Power EngineeringEast China University of Science and TechnologyShanghai 200237China AECC Commercial Aircraft Engine Co.LTD Shanghai Engineering Research Center for Commercial Aircraft EngineShanghai 201108China

Submerged Abrasive Waterjet Peening(SAWJP)shows great application potential in augmenting the fatigue properties of metallic ***,the present work aims to investigate the influence of SAWJP on the Surface Integrity(SI)and Fretting Fatigue(FF)properties of Inconel 718(IN718)superalloy and illustrate the microstructural evolution,FF life improvement,and fretting wear ***,the SI of the IN718 specimen was examined following treatment via *** showed that the specimen subjected to SAWJP formed a total plastic deformation layer of 56μ*** maximum microhardness and Compressive Residual Stress(CRS)measured across the depth of the SAWJP-treated specimens exhibited an increase in values ranging between 522 HV and 541 HV and 1171–1380 MPa,*** FF test results of the specimen before and after SAWJP treatment at ambient temperatures indicated that the FF life of the SAWJP-treated specimen surpassed that of the as-received specimen by a factor of *** examination of the FF fracture,contact surface,and crack propagation behavior revealed the crucial factors contributing to the enhanced FF resistance of the IN718 specimen,including the gradient nanostructure characterized by ultra-refined grains,substantial CRS,and elevated microhardness,which were all induced by the SAWJP treatment.

关键词： Submerged abrasive waterjet peening Inconel 718 superalloy Microstructural evolution Surface integrity Fretting fatigue

Dual-functional additive of cesium ion for achieving ultrahigh efficiency of persistent phosphorescence in existing polymer-based materials

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Science China Chemistry 2025年第2期68卷 754-762页

作者： yao Liu Jinzheng Chen Yiling Miao Kaimin zhang Faxu Lin Huahua Huang Lina zhang Zhan Yang Yi zhang Zhenguo Chi Zhiyong Yang Key Laboratory for Polymeric Composite&Functional Materials of Ministry of Education Guangdong Engineering Technology Research Center for High-performance Organic and Polymer Photoelectric Functional FilmsGuangdong Basic Research Center of Excellence(GBRCE)for Functional Molecular EngineeringSchool of ChemistrySun Yat-sen UniversityGuangzhou 510275China School of Materials Science and Engineering Sun Yat-sen UniversityGuangzhou 510275China College of Materials Science and Engineering Hebei University of EngineeringHandan 056038China School of Environmental and Chemical Engineering Wuyi UniversityJiangmen 529020China

Despite great achievements obtained for polymer-based room-temperature phosphorescence(RTP)materials,the limited efficiencies of persistent RTP still hinder their ***,a simple and universal strategy of using the dual-functional additive of Cs+was presented,which could simultaneously enhance the efficiency(Φp)and maintain the long lifetime(τp)of RTP in existing polymer-based systems with various phosphors and *** them,the commercial emitter(TpB)-doped polyvinyl alcohol(PVA)/Cs_(2)CO_(3) system possessed an extremely high Φp up to 75.5% and still maintained a longτp of 2.13 s,by introducing the heavy-atom effect and an extra network of ionic bonding through the Cs+***,the temperature resistance of RTP in TpB@PVA/Cs+film could also be improved to 85℃.More satisfactorily,the efficiency of Förster resonance energy transfer(FRET)from RTP to near-infrared(NIR)was also remarkably enhanced in the multi-component *** work provides a simple and universal strategy for developing polymer systems with high RTP performance.

关键词： persistent phosphorescence cesium carbonate efficiency heavy-atom effect ionic interaction

Methyl Groups Pendant on Triphenylmethane Toward Modulating Thermal Stability and Dielectric Properties of the Crosslinkable Fluorinated Polyimide Films with High Transparency

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Chinese Journal of Polymer Science 2025年第2期43卷 316-327页

作者： Wen Yang Liang Yuan Kai Gong Ruo-Han zhang Lan Lei hui Li School of Chemistry and Chemical Engineering Shandong Key Laboratory of Fluorine Chemistry and Chemical Engineering MaterialsUniversity of JinanJinan250022China School of Materials Science and Engineering Tianjin Key Laboratory of Composite and Functional MaterialsTianjin UniversityTianjin300350China

It is urgent to develop high-performance polyimide(PI)films that simultaneously exhibit high transparency,exceptional thermal stability,mechanical robustness,and low dielectric to fulfil the requirements of flexible display ***,a series of fluorinated polyimide films(FPIs)were fabricated by the condensation of 5,5′-(perfluoropropane-2,2-diyl)bis(isobenzofuran-1,3-dione)(6FDA)and the fluorinated triphenylmethane diamine monomer(EDA,MEDA and DMEDA)with heat-crosslinkable tetrafluorostyrene side groups,which was incorporated by different numbers of methyl groups pendant in the ortho position of amino ***,the FPI films underwent heating to produce crosslinking FPIs(C-FPIs)through the self-crosslinking of double bonds in the *** transparency,solvent resistance,thermal stability,mechanical robustness and dielectric properties of FPI and C-FPI films can be tuned by the number of methyl groups and crosslinking,which were deeply investigated by virtue of molecular dynamics(MD)simulations and density functional theory(DFT).As a result,all the films exhibited exceptional optically colorless and transparent,with transmittance in the visible region of 450-700 nm exceeding 79.9%,and the cut-off wavelengths(λ_(off))were nearly 350 *** thermal decomposition temperatures at 5% weight loss(T_(d5%))for all samples exceeded 504℃.These films exhibited a wide range of tunable tensile strength(46.5-75.1 MPa).Significantly,they showed exceptional dielectric properties with the dielectric constant of 2.3-2.5 at full frequency(10^(7)-20 Hz).This study not only highlights the relationship between the polymer molecular structure and properties,but offer insights for balancing optical transparency,heat resistance and low dielectric constant in PI films.

关键词： Crosslinkable fluorinated polyimide Methyl group Triphenylmethane Transparency Thermal stability Low dielectric constant

Correlation between grain size,mechanical properties and deformed microstructure of Fe-20Mn-6Al-0.6C-0.15Si low-density steel

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Journal of Iron and Steel Research International 2025年第1期32卷 282-292页

作者： Qi zhang Guang-hui Chen Zheng-liang Xue Zheng-kun Chen Guang Xu State Key Laboratory of Refractories and Metallurgy Wuhan University of Science and TechnologyWuhan430081HubeiChina Key Laboratory for Ferrous Metallurgy and Resources Utilization of Ministry of Education Wuhan University of Science and TechnologyWuhan430081HubeiChina Red Eagle Novel Refractory Materials Research Institute Zhejiang Red Eagle Group Co.Ltd.Huzhou313000ZhejiangChina

The effects of austenite grain size on the deformed microstructure and mechanical properties of an Fe-20Mn-6Al-0.6C-0.15Si(wt.%)low-density steel were *** microstructure of the experimental steel after solution treatment was single austenitic *** austenite grain size increased with solution temperature and time.A model was established to show the relationship between temperature,time and austenite grain size for the experimental *** addition,as the solution temperature increased,the strength decreased,while the elongation first increased and then *** decrease in elongation after solution treatment at 1100℃ for 90 min is contributed to the over-coarse austenite ***,after solution treatment at 900℃ for 90 min,the strength-elongation product reached the highest value of 44.4 GPa%.As the austenite grain size increased,the intensity of//tensile direction fiber *** was accompanied by a decrease in dislocation density,resulting in a lower fraction of low-angle grain boundaries and a lower work hardening ***,the austenite grain size has a critical influence on the mechanical properties of the low-density *** grains lead to a lower yield strength due to the Hall-Petch effect and a lower tensile strength because of lower dislocation strengthening.

关键词： Austenitic low-density steel Solution treatment Grain size Mechanical property Deformed microstructure