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Binder-induced ultrafast ■-intercalation toward a high-voltage,high-power and long-cycling zinc–graphite dual-ion battery

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Rare Metals 2024年第10期43卷 5017-5029页

作者： Gen Li Xiao-Jun Shi Ting Dong qian Yu Zhi-Fei Mao Xin-Hua Liu rui Wang Bei-Bei He Jun Jin Yan-Sheng Gong Huan-Wen Wang Engineering Research Center of Nano-Geomaterials of Ministry of Education Faculty of Material Science and ChemistryChina University of Geosciences College of Resources and Environment South-Central Minzu University School of Transportation Science and Engineering Beihang University

Metallic zinc is an ideal anode material owing to its high theoretical capacity (819 mAh·g-1),ecofriendliness,low cost and high safety,which have driven fast development of Zn-ion batteries （ZIBs）.However,the practical application of current ZIBs is significantly restricted by irregular dendrite growth of zinc anode and the low working voltage （usually<2 V） of cathode ***,we report a high-voltage Zn-based dualion battery （DIB）,which is constructed by a graphite cathode,a Zn anode,and 3 M LiPF6in the ethyl methyl carbonate （EMC） *** the corrosion interaction of Li+ions,Zn2+can be easily dissolved from Zn anode into the electrolyte to enable dendrite-free Zn2+plating/stripping at the ***,an aqueous carboxymethyl cellulose （CMC） binder is employed to generate a robust cathode electrolyte interface （CEI） layer on the graphite cathode,which renders ultrafast PF6--de-/intercalation into *** resultant Zn–graphite DIB operates stably at a high cut off voltage of 3.2 V,corresponding to an average output voltage of 2.2 *** 9000cycles at 5C,the high capacity retention of 95.9% can be achieved with～100%Coulomb *** on the mass of cathode material,our Zn–graphite battery exhibits ultrafast rate capability （60 C,a discharge time of 44 s） and high energy/power densities (208 Wh·kg-1at 214 W·kg-1;142 Wh·kg-1at 8692 W·kg-1),which holds great promise for large-scale energy storage.

关键词： Binder Graphite High-voltage PF6−-de-/intercalation Zn-ion batteries

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Molecular mechanism of exopolysaccharide biosynthesis regulated by wze and wzd genes on the immunomodulatory effects of probiotic Lacticaseibacillus paracasei S-NB

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Food Science and Human Wellness 2024年

作者： Luyao Xiao qian Yang Changliang Zhang Kai Ma Xiaogan Zhao Xin rui Wei Li Jiangsu Biodep Biotechnology Co.， Ltd. Jiangsu New-Bio Biotechnology Co.， Ltd. Sanya Institute of Nanjing Agricultural University， College of Food Science and Technology， Nanjing Agricultural University

The surface macromolecules of probiotic bacteria play crucial roles in modulating immune responses in the host. Exopolysaccharide (EPS) from lactic acid bacteria (LAB) have been widely reported to exhibit immunomodulatory activity. In this study， the EPS biosynthesis gene cluster of Lacticaseibacillus paracasei S-NB was analyzed and a deletion mutant S-NB△7576 (two genes S-NB＿2175/wze and S-NB＿2176/wzd were responsible for the chain length determination and export of EPS) was successfully constructed， resulting a 40.02% decrease in the production of EPS. The deletion of wze and wzd had little effect on the monosaccharide composition and major groups of the two EPS fractions (BEPS1 and BEPS2). Both BEPS1 and BEPS2 could inhibit the transcriptional level of tumor necrosis factor-α (TNF-α)， interleukin-1β (IL-1β)， inducible nitric oxide synthase (iNOS) and cyclooxygenase-2 (COX-2) mRNA in RAW 264.7 cells induced by lipopolysaccharide (LPS)， and enhance host immune tolerance via suppressing NF-κB and MAPK signaling. Notably， the S-NB△7576 mutant supplied with the BEPS1/BEPS2 exhibited more significant inhibition of cytokines production and the phosphorylation of p65 and c-Jun N-terminal kinase (JNK) in LPS-stimulated cells compared with the S-NB△7576 mutant alone. Our study provided the immunomodulatory effect of BEPS1 and BEPS2 from L. paracasei S-NB， in which the wze and wzd genes associated with EPS biosynthesis may play an important role.

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Preparation of bifunctional electrocatalyst by recycling heavy metal ions from wastewater using EDTAD-functionalized MOF as highly efficient adsorbent

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Rare Metals 2024年第10期43卷 5105-5116页

作者： Yue qian Pei-Xue Fu rui-Ze Yin Han-Ni Yang Si-Yang Li Wei-Wei Xiong Fen-Fen Zheng Jun-Hao Zhang Ai-Hua Yuan Huan Pang School of Environmental and Chemical Engineering Jiangsu University of Science and Technology School of Chemistry and Chemical Engineering Yangzhou University

The recovery and subsequent reuse of heavy metal ions from industrial wastewater are crucial for promoting sustainable development,but they also presen significant *** this article,ethylenediaminetetraacetic dianhydride （EDTAD）,which possesses strong metal chelating ability,is covalently attached to MIL-101-NH2（Fe）,resulting in a significant improvement in the removal rate of heavy metal ions in ***,the recovered waste metal ions are transformed into high-performance FeNi3/NiFe2O4@NC dual-functional oxygen evolution reaction （OER） and oxygen reduction reaction （ORR） ***,FeNi3/NiFe2O4@NC exhibits outstanding OER performance,with only a264 mV overpotential at 10 mA·*** functiona theory （DFT） calculations reveal that the synergistic effect of the FeNi3/NiFe2O4@NC heterostructure can enhance conductivity,optimize the free energy of*to OH*during OER reaction,and promote catalytic *** work not only improves the removal rate of heavy metal ions but also obtains high-performance catalysts,while providing a new approach for the treatment and secondary utilization of heavy metal ion wastewater as well as the preparation of low-cost catalysts.

关键词： Bifunctional electrocatalyst Covalently modified MOF Ethylenediaminetetraacetic dianhydride Heavy metals

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Recent progress in MnBi2nTe3n+1 intrinsic magnetic topological insulators: crystal growth, magnetism and chemical disorder

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National Science Review 2024年第2期11卷 65-80页

作者： Chaowei Hu Tiema qian Ni Ni Department of Physics and Astronomy and California Nano Systems Institute University of California-Los Angeles

The search for magnetic topological materials has been at the forefront of condensed matter research for their potential to host exotic states such as axion insulators, magnetic Weyl semimetals, Chern insulators,etc. To date, the MnBi2nTe3n+1family is the only group of materials showcasing van der Waals-layered structures, intrinsic magnetism and non-trivial band topology without trivial bands at the Fermi level. The interplay between magnetism and band topology in this family has led to the proposal of various topological phenomena, including the quantum anomalous Hall effect, quantum spin Hall effect and quantum magnetoelectric effect. Among these, the quantum anomalous Hall effect has been experimentally observed at record-high temperatures, highlighting the unprecedented potential of this family of materials in fundamental science and technological innovation. In this paper, we provide a comprehensive review of the research progress in this intrinsic magnetic topological insulator family, with a focus on single-crystal growth, characterization of chemical disorder, manipulation of magnetism through chemical substitution and external pressure, and important questions that remain to be conclusively answered.

关键词： MnBi2Te4 magnetic topological insulator magnetism tuning antiferromagnetism ferromagnetism pressure chemical doping

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AFM probe with the U-shaped cross-sectional cantilever for measuring the ultra-low coefficient of friction of 10^(–6)

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Friction 2024年第8期12卷 1707-1715,F0004页

作者： Yushan CHEN Liang JIANG Linmao qian Tribology Research Institute State Key Laboratory of Traction PowerSouthwest Jiaotong UniversityChengdu 610031China

Accurately measuring the coefficient of friction(COF)is the fundamental prerequisite of superlubricity *** study aimed to reduce the COF measurement resolutionΔμof atomic force microscopy(AFM).Based on the theoretical model,a distinctive strategy was adopted to reduceΔμby optimizing the cantilever’s cross-section of the AFM probe,inspired by civil engineering.Δμcan be reduced by decreasing the width of the horizontal side wR and the wall thickness t and increasing the width of the vertical side ***,the I-shape demonstrates the highest reduction inΔμ,followed by the *** the processability,the AFM probe with the U-shaped cross-sectional cantilever was investigated further,and the dimensions are 35μm wR,3.5μm wH,0.5μm t,50μm l(cantilever length),and 23μm htip(tip height).The finite element analysis results confirm its *** being fabricated and calibrated,the AFM probe achieves the minimalΔμof 1.9×10^(–6)under the maximum normal force so ***,the friction detection capability of the fabricated AFM probe improves by 78 times compared to the commercial tipless-force modulation mode(TL-FM)AFM probe with the conventional solid rectangular cross-sectional *** study provides a powerful tool for measuring 10^(–6)COF.

关键词： atomic force microscopy superlubricity coefficient of friction probe cantilever

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AFM probe for measuring~10^(−5)ultra-low friction coefficient:Design and application

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Friction 2024年第1期12卷 64-73页

作者： Yushan CHEN Liang JIANG Linmao qian Tribology Research Institute State Key Laboratory of Traction PowerSouthwest Jiaotong UniversityChengdu 610031China

Superlubricity provides a novel approach to addressing friction and wear issues in mechanical ***,little is known regarding improving the atomic force microscope(AFM)friction coefficient measurement ***,this study established the theoretical formula for the AFM friction coefficient measurement and deduced the measurement ***,the formula was applied to the AFM probe with a rectangular cross-section *** measurement resolution is associated with the dimensional properties of the AFM probe,the mechanical properties of the cantilever material,the properties of the position-sensitive detector(PSD),and probably the anti-vibration performance of the *** is feasible to make the cantilever as short as possible and the tip as high as possible to improve the measurement *** AFM probe for measuring an ultra-low friction coefficient was designed and *** cantilever’s length,width,and thickness are 50,35,and 0.6μm,*** tip height is 23μ*** measurement resolution can reach 7.1×10^(−6) under the maximum normal ***,the AFM probe was applied to measure the superlubricity between graphene *** friction coefficient is 0.00139 under 853.08 *** work provides a promising method for measuring a~10^(−5) friction coefficient of superlubricity.

关键词： atomic force microscope(AFM) superlubricity friction coefficientμ probe

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Existence and asymptotics of normalized solutions for the logarithmic Schrödinger system

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Science China Mathematics 2024年第9期67卷 2019-2048页

作者： qian Zhang Wenming Zou Department of Mathematical Sciences Tsinghua UniversityBeijing 100084China

This paper is concerned with the following logarithmic Schrodinger system:{-Δu_(1)+ω_(1)u_(1)=u_(1)u_(1)logu_(1)^(2)+2p/p+q|u_(2)|^(q)|u_(1)|^(p-2)u_(1),-Δu_(2)+ω_(2)u_(2)=u_(2)u_(2)log u_(2)^(2)+2q/p+q|u_(1)|^(p)|u_(2)|^(q-2)u_(2),∫_(Ω)|u_(i)|^(2)dx=ρ_(i),i=1,2,(u_(1),u_(2))∈H_(0)^(1)(Ω;R^(2)),where Ω=R^(N)or Ω■R^(N)(N≥3)is a bounded smooth domain,andω_(i)R,μ_(i),ρ_(i)>0 for i=1,***,p,q≥1,and 2≤p+q≤2^(*),where 2^(*):=2N/*** using a Gagliardo-Nirenberg inequality and a careful estimation of u log u^(2),firstly,we provide a unified proof of the existence of the normalized ground state solution for all 2≤p+q≤2^(*).Secondly,we consider the stability of normalized ground state ***,we analyze the behavior of solutions for the Sobolev-subcritical case and pass to the limit as the exponent p+q approaches 2^(*).Notably,the uncertainty of the sign of u log u^(2)in(0,+∞)is one of the difficulties of this paper,and also one of the motivations we are interested *** particular,we can establish the existence of positive normalized ground state solutions for the Brézis-Nirenberg type problem with logarithmic perturbations(i.e.,p+q=2^(*)).In addition,our study includes proving the existence of solutions to the logarithmic type Bréis-Nirenberg problem with and without the L^(2)-*** ∫_(Ω)|u_(i)|^(2)dx=ρ_(i)(i=1,2)by two different methods,*** results seem to be the first result of the normalized solution of the coupled nonlinear Schrodinger system with logarithmic perturbations.

关键词： logarithmic Schrodinger system Brézis-Nirenberg problem normalized solution existence and stability behavior of solutions

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Special issue:Catenary optics and catenary electromagnetics

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Opto-Electronic Advances 2024年第5期7卷 1-4页

作者： qian Sun Minghui Hong Pen-Tung Sah Institute of Micro-Nano Science and Technology Xiamen UniversityXiamen 361005China Innovation Laboratory for Sciences and Technologies of Energy Materials of Fujian Province(IKKEM) Xiamen 361005China

As a natural mathematical form,a catenary is the curve that a hanging chain or cable adopts under its own weight when supported at its ends in a homogeneous gravitational *** unique shape arises from the balance of forces acting on each segment of the chain,resulting in a curve described by hyperbolic cosine *** functions play pivotal roles in describing the electromagnetic field,intensity distribution,and dispersion of structured light on the sub-wavelength scale^(1).

关键词： functions field optics

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Potential role of the protein interactome in translating TCM theory and clinical practice into modern biomedical knowledge

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Chinese Journal of Natural Medicines 2024年第5期22卷 385-386页

作者： CHEN qian FAN Xiaohui Pharmaceutical Informatics Institute College of Pharmaceutical SciencesZhejiang UniversityHangzhou 310058China National Key Laboratory of Chinese Medicine Modernization Innovation Center of Yangtze River DeltaZhejiang UniversityJiaxing 314100China

With the awarding of the 2015 Nobel Prize in Physiology or Medicine to Chinese pharmacologist Tu Youyou,and the significant contributions of traditional Chinese medicine(TCM)for coronavirus disease 2019(COVID-19),TCM has garnered increasing attention and interest *** advanced research progress has been made in the efficacy research,mechanism elucidation and target prediction of TCM in recent years[1].

关键词： Protein interactome Traditional Chinese medicine Therapeutic effectiveness

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Prescribed-Time Fully Distributed Nash Equilibrium Seeking Strategy in Networked Games

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IEEE/CAA Journal of Automatica Sinica 2024年第1期11卷 261-263页

作者： Cheng qian Lei Ding the Institute of Advanced Technology for Carbon Neutrality College of Automation&the College of Artificial Intelligence Nanjing University of Posts and TelecommunicationsNanjing 210023China IEEE

Dear Editor, This letter is concerned with prescribed-time fully distributed Nash equilibrium seeking for networked games under directed graphs. An adaptive algorithm is proposed to ensure the convergence of all players to the Nash equilibrium without requiring any knowledge of global parameters. Moreover, it is theoretically proved that the convergence time of the proposed seeking strategy can be predefined based on practical requirements. Finally, a numerical example is presented to validate the effectiveness of the proposed method.

关键词： parameters seeking prescribed

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