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Staged dendrite suppression for high safe and stable lithium-sulfur batteries

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Journal of Energy chemistry 2025年第1期100卷 674-683页

作者： Jun Jiang Zhenjie Lu Yanwen Ding Shujun Liu Zhijie Qi Tian Tang Yunfan zhang Zhiyuan Ma Jingwen Sun Liang x.e Wenyao zhang Pan x.ong x.n Wang Junwu Zhu Yongsheng Fu Key Laboratory for Soft chemistry and Functional Materials of Ministry of Education Nanjing University of Science and Technology Jiangsu Pylon Battery co.Ltd

The unavoidable dendrite growth and shuttle effect have long been stranglehold challenges limiting the safety and practicality of lithium-sulfur ***,we propose a dual-action strategy to address the lithium dendrite issue in stages by constructing a multifunctional surface-negatively-charged nanodiamond layer with high ductility and robust puncture resistance on polypropylene （PP） *** uniformly loaded compact negative layer can not only significantly enhance electron transmission efficiency and promote uniform lithium deposition,but also reduce the formation of dendrite during early deposition *** importantly,under the strong puncture stress encountered during the deterioration of lithium dendrite growth under limiting current,the high ductility and robust puncture resistance（145.88 MPa） of as-obtained nanodiamond layer can effectively prevent short circuits caused by unavoidable lithium *** Li||Li symmetrical cells assembled with nanodiamond layer modified PP demonstrated a stable cycle of over 1000 h at 2 mA cm-2with a polarization voltage of only 29.3 ***,the negative charged layer serves as a physical barrier blocking lithium polysulfide ions,effectively mitigating capacity *** improved cells achieved a capacity decay of only 0.042%per cycle after 700 cycles at 3 c,demonstrating effective suppression of dendrite growth and capacity attenuation,showing promising prospect.

关键词： Ductility

Fluorinated poly(p-triphenylene isatin) anion ex.hange membranes based on hydrophilic hydrox.l side chain modulation for fuel cells

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Journal of Energy chemistry 2025年第1期100卷 702-709页

作者： Yiman Gu Yanchao zhang Zhanyu Li Yijia Lei Baozeng Sun x.aoyu Yu Zhe Wang college of chemistry and Life Science Changchun University of Technology college of chemical Engineering Changchun University of Technology School of Materials Science and Engineering Changchun University of Technology Key Laboratory of Advanced Functional Polymer Membrane Materials of Jilin Province

The development of alkaline fuel cells is moving forward at an accelerated pace,and the application of ether-free bonded polymers to anion ex.hange membranes （AEMs） has been widely ***,the question of the“trade-off”between AEM ionic conductivity and dimensional stability remains *** strategy of inducing microphase separation to improve the performance of AEM has attracted much attention recently,but the design of optimal molecular structures is still being ***,this work introduced different ratios of 3-bromo-1,1,1-trifluoroacetone （x.40,50,and 60） into the main chain of poly（p-terphenylene isatin）.Because fluorinated groups have ex.ellent hydrophobicity,hydrophilic hydrox.l-containing side chains are introduced to jointly adjust the formation of phase separation *** results show that PTI-PTF50-NOH AEM with the appropriate fluorinated group ratio has the best ionic conductivity and alkali stability under the combined effect of *** has an ionic conductivity of 133.83 mS cm-1at 80°*** addition,the OH-conductivity remains at 89%of the initial value at 80°c and 3 M KOH for 1056 h of *** cell polarization curve based on PTI-PTF50-NOH shows a power density of 734.76 mW cm-2at a current density of 1807.7 mA cm-2.

关键词： Potassium hydrox.de

Reversible Li2c2O4 product regulation in Li–cO2 batteries using single-atom alloy engineering

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Science china chemistry 2025年

作者： x.nx.n zhang Yu Wang Yafei Li Jiangsu Key Laboratory of New Power Batteries Jiangsu Collaborative Innovation Centre of Biomedical Functional Materials School of Chemistry and Materials Science Nanjing Normal University

The efficiency of lithium-carbon diox.de （Li–cO2） batteries is limited by the sluggish generation/decomposition kinetics of the discharge products （i.e.,Li2cO3and carbon） despite the use of state-of-the-art noble metal （NM） ***2c2O4has emerged as a promising alternative product;however,the thermodynamic instability of Li2c2O4causes it to generally appear as an intermediate in Li2cO3pathways rather than a product during ***,using comprehensive first-principles calculations,we report tailoring the discharge products of Li–cO2batteries to Li2c2O4via single-atom alloy （SAA） engineering,in which NM-doped copper SAAs （NM1cu） are constructed for *** NM1cu catalysts display a free-atom-like narrow d-band state and unique charge distribution over the solute NM1atom and the surrounding matrix.cu *** an optimized electronic structure is substantial in Ru1cu and Ir1cu,which is conducive to the co-activation and coupling of *** lithiation of*cO2intermediate that breaks the charge symmetry of the central c species can further reduce the kinetic barriers of the c–c *** advantages promote Li2c2O4generation on Ru1cu and Ir1cu while suppress its subsequent ***,they ex.ibit low theoretical overpotentials and enable facile delithiation under normal charging *** work proposes a universal principle of manipulating electronic structures to achieve Li2c2O4product,which provides practical guidance for the development of Li–cO2batteries.

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Effects of Y content and temperature on the damping capacity of ex.ruded Mg-Y sheets

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Journal of Magnesium and Alloys 2019年第3期7卷 522-528页

作者： Y.T.Tang c.zhang L.B.Ren W.Yang D.D.Yin G.H.Huang H.Zhou Y.B.zhang Key Laboratory of Advanced Technologies of Materials Ministry of EducationSchool of Materials Science and EngineeringSouthwest Jiaotong UniversityChengduSichuan 610031PR China Nano and Heterogeneous Materials center School of Materials Science and EngineeringNanjing University of Science and TechnologyNanjing 210094PR China

The damping behavior of ex.ruded Mg-x.(x.0.5,1.0,3.0 wt.%)sheets were investigated in detail concerning the effects of Y addition and temperature,and the relationship between damping capacity and yield strength was *** room temperature(RT),with Y content increasing from 0.5%to 3.0%,the damping capacity(Q-1)significantly decreased from 0.037 to *** all the studied sheets,the relationship between strain amplitude and Q-1 fitted well with the Granato and Liicke(G-L)dislocation damping *** temperature increased,the G-L plots deviated from linearity indicating that the dislocation damping was not the only dominate mechanism,and the grain boundary sliding(GBS)could contribute to damping ***,the Q-1 increased remarkably above the critical temperature,and the critical temperature increased significantly from 50℃ to 290℃ with increasing Y contents from 0 to 3.0wt.%.This result implied that the segregation of Y solutes at grain boundary could depress the GBS,which was consistent with the recent finding of segregation tendency for rare-earth *** ex.ruded Mg-IY sheet ex.ibited slightly higher yield strength(Rp0.2)and Q-1 comparing with high-damping Mg-0.6Zr at *** an elevated temperature of 325℃,the Mg-IY sheet had similar Q-1 but over 3 times larger Rp0.2 than that of the pure *** present study indicated that the ex.ruded Mg-Y based alloys ex.ibited promising potential for developing high-performance damping alloys,especially for the elevated-temperature application.

关键词： Ex.ruded sheets Mg-Y alloys Damping capacity Granato and Lücke model Elevated temperature

Electrically conductive Honeycomb Monolith of Nanolaminated Ti_3Alc_2:Preparation and characterization

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Journal of Materials Science & Technology 2015年第1期31卷 125-128页

作者： x.M.Fang x.H.Wang H.zhang Y.c.Zhou Shenyang National Laboratory for Materials Science Institute of Metal ResearchChinese Academy of Sciences University of chinese Academy of Sciences Science and Technology of Advanced Functional composite Laboratory ARIMPT

Nanolaminated Ti3Alc2honeycomb monolith with parallel and uniform holes has been prepared through a facile ex.rusion route by using Ti3Alc2powder as the main raw *** fabricated honeycomb monolith has high compressive strength of 133 ± 11 and 59 ± 9 MPa,along and perpendicular to the ex.rusion direction,*** also has good electrical conductivity,and ex.ellent match of thermal ex.ansion coefficient with the washcoat material of γ-*** combined properties endow the honeycomb monolith a promising candidate as catalysis substrate for cleaning vehicle ex.aust.

关键词： Honeycomb ceramic Ti3Alc2 Ex.rusion catalysis

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constructing Donor–Acceptor‑Linked cOFs Electrolytes to Regulate Electron Density and Accelerate the Li^(+)Migration in Quasi‑Solid‑State Battery

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Nano-Micro Letters 2025年第1期17卷 456-471页

作者： Genfu Zhao Hang Ma conghui zhang Yongx.n Yang Shuyuan Yu Haiye Zhu Yongjiang Sun Hong Guo School of Materials and Energy International Joint Research Center for Advanced Energy Materials of Yunnan ProvinceYunnan UniversityKunming 650091People’s Republic of China Yunnan Yuntianhua co. LtdR&D CenterKunming 650228People’s Republic of China Southwest United Graduate School Kunming 650091People’s Republic of China

Regulation the electronic density of solid-state electrolyte by donor–acceptor(D–A)system can achieve highly-selective Li^(+)transportation and conduction in solid-state Li metal *** study reports a high-performance solid-state electrolyte thorough D–A-linked covalent organic frameworks(cOFs)based on intramolecular charge transfer *** other reported cOFbased solid-state electrolyte,the developed concept with D–A-linked cOFs not only achieves electronic modulation to promote highly-selective Li^(+)migration and inhibit Li dendrite,but also offers a crucial opportunity to understand the role of electronic density in solid-state Li metal *** introduced strong electronegativity F-based ligand in cOF electrolyte results in highlyselective Li^(+)(transference number 0.83),high ionic conductivity(6.7×10^(-4)S cm^(−1)),ex.ellent cyclic ability(1000 h)in Li metal symmetric cell and high-capacity retention in Li/LiFePO_(4)cell(90.8%for 300 cycles at 5c)than substituted c-and N-based *** is ascribed to outstanding D–A interaction between donor porphyrin and acceptor F atoms,which effectively ex.edites electron transferring from porphyrin to F-based ligand and enhances Li^(+)***,we anticipate that this work creates insight into the strategy for accelerating Li^(+)conduction in high-performance solid-state Li metal batteries through D–A system.

关键词： Electronic modulation engineering Donor-acceptor-linked covalent organic frameworks Quasi-solid-state Li metal battery

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Thermodynamic aspects of ATP hydrolysis of actomyosin complex

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Biophysics Reports 2016年第Z2期2卷 87-94页

作者： x.ejun c.zhang Wei Feng National Laboratory of Macromolecules National Center of Protein Science-Beijing Institute of Biophysics Chinese Academy of Sciences

Directional movement of cellular components is essential to all eukaryotic cells, and is driven by a mechanoenzymatic system consisting largely of the actin–myosin cytoskeletal protein complex. Structural and functional analysis of this complex.has provided critical insights into the mechanisms that enforce and regulate the movement of intracellular components such as muscle fibers, vesicles, as well as organelles. However,the structural bases of energy coupling between ATP hydrolysis and force generation common for all myosins remain elusive. Here we briefly review the widely accepted concept of how the actin–myosin cycle functions. We then propose a model based on the assumption that most of the chemical energy stored in ATP is released in the step of ATP binding, not during the hydrolysis step per se. Importantly, we propose that this energy is used to dissociate myosin from the actin filament, the most energy-intensive step in the reaction of the actin–myosin functional cycle. This suggests that the dissociation step serves as the major energy storage,thus driving the remaining functional cycle of the actin–myosin complex.

关键词： Thermodynamic aspects ATP hydrolysis actomyosin complex

Stable copper boron–imidazolate cage as cu-riched enzyme for highly efficient electrocatalytic cO2 reduction to ethylene

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Science china chemistry 2025年

作者： Jun-Qiang chen Qiao-Hong Li Qin-Long Hong Ping Shao Hai-x.a zhang Jian zhang State Key Laboratory of Structural chemistry Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences

Single-atom catalyst has garnered widespread attention to mimic mature enzymes due to its well-defined atomic structure and coordination environments. However, since the carbon–carbon（c–c） coupling reactions require synergistic catalysis of multiple sites, single-atom catalysts suffer from insufficient active sites and unclear reaction mechanisms. controlling the reaction intermediates in a precisely targeted pocket through careful metal–organic cage design is therefore crucial. Here, we prepare a tetrahedral [cu6L4]-type boron–imidazolate cage integrating highly active cu sites and optimized cavity, which ex.ibits enzyme like specific catalytic performance in electrochemical cO2reduction reaction（cO2RR） to enhance the selectivity of *** analyses and computational calculations suggest that the single cu site together with neighboring boron–imidazolate ligands provides suitably synergistic effects that enable the energetically favorable formation of an *cOcHO intermediate, a key step determining selectivity. As a result, the [cu6L4]-type cage of BIc-145 achieves a Faradaic efficiency of 28% for c2H4maintaining an average current density of -3.54 mA cm-2over a 5-hour electrolysis period. This work represents the first ex.mple for studying single-metal site catalysts with ultra-low coordination numbers through the rational design of metal–organic cages.

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Storage time affects the level and diagnostic efficacy of plasma biomarkers for neurodegenerative diseases

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Neural Regeneration Research 2025年第8期20卷 2373-2381页

作者： Lifang Zhao Mingkai zhang Qimeng Li x.emin Wang Jie Lu Ying Han Yanning cai Department of clinical Biobank Xuanwu HospitalCapital Medical UniversityBeijingChina Beijing Geriatric Medical Research center BeijingChina Department of Neurology Xuanwu HospitalCapital Medical UniversityBeijingChina Department of Radiology and Nuclear Medicine Xuanwu HospitalCapital Medical UniversityBeijingChina Beijing Key Laboratory of Magnetic Resonance Imaging and Brain Informatics BeijingChina Key Laboratory of Neurodegenerative diseases Ministry of EducationBeijingChina School of Biomedical Engineering Hainan UniversityHaikouHainan ProvinceChina center of Alzheimer’s Disease Beijing Institute for Brain DisordersBeijingChina National clinical Research center for Geriatric Diseases BeijingChina Institute of Biomedical Engineering Shenzhen Bay LaboratoryGaoke Innovation CenterShenzhenGuangdong ProvinceChina Department of Neurobiology Xuanwu HospitalCapital Medical UniversityBeijingChina

Several promising plasma biomarker proteins,such as amyloid-β(Aβ),tau,neurofilament light chain,and glial fibrillary acidic protein,are widely used for the diagnosis of neurodegenerative ***,little is known about the long-term stability of these biomarker proteins in plasma samples stored at-80°*** aimed to ex.lore how storage time would affect the diagnostic accuracy of these biomarkers using a large *** samples from 229 cognitively unimpaired individuals,encompassing healthy controls and those ex.eriencing subjective cognitive decline,as well as 99 patients with cognitive impairment,comprising those with mild cognitive impairment and dementia,were acquired from the Sino Longitudinal Study on cognitive Decline *** samples were stored at-80°c for up to 6 years before being used in this *** results showed that plasma levels of Aβ42,Aβ40,neurofilament light chain,and glial fibrillary acidic protein were not significantly correlated with sample storage ***,the level of total tau showed a negative correlation with sample storage ***,in individuals without cognitive impairment,plasma levels of total protein and tau phosphorylated protein threonine 181(p-tau181)also showed a negative correlation with sample storage *** was not observed in individuals with cognitive ***,we speculate that the diagnostic accuracy of plasma p-tau181 and the p-tau181 to total tau ratio may be influenced by sample storage ***,caution is advised when using these plasma biomarkers for the identification of neurodegenerative diseases,such as Alzheimer's ***,in cohort studies,it is important to consider the impact of storage time on the overall results.

关键词： Alzheimer’s disease amyloid-β diagnostic ability glial fibrillary acidic protein neurodegeneration neurofilament light chain plasma biomarkers single molecule array storage time tau

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