Ultrathin poly(cyclocarbonate-ether)-based composite electrolyte reinforced with high-strength functional skeleton

Composite polymer electrolytes(CPEs)are considered to be the most promising to break through the performance and safety limitations of traditional lithium-ion batteries because of their excellent electrochemical and mechanical properties.Aiming at the performance limitations of the most common polyether matrix such as poly(ethylene oxide)(PEO),a novel poly(cyclocarbonate-ether)polymer matrix was prepared by in-situ thermal curing,the weaker interaction between its C=O bond and Li^(+)can promote the rapid transport of Li^(+).Adding ionic liquid and active filler LLZTO to the matrix can synergistically reduce the crystallinity of matrix and promote the dissociation of lithium salts.In addition,a 3D functional skeleton made of polyacrylonitrile(PAN)and lithium fluoride(LiF)can greatly improve the mechanical strength of polymer matrix after cold pressing,and Li F is also conducive to interface stability.The thickness of the optimal sample(VP6L/CPL)was only 25μm,and its ionic conductivity,lithium ion transference number,and electrochemical stability window were as high as 7.17×10^(-4)S cm^(-1)(25℃),0.54 and 5.4 V,respectively,while the mechanical strength reaches 6.1 MPa,which can fully inhibit the growth of lithium dendrites.The excellent electrochemical performance and mechanical strength enable the assembled Li|VP6L/CPL|Li battery to be continuously charged for over 200 h and cycled stably for more than 2300 h,and Li|VP6L/CPL|LFP battery can be stably cycled for more than 400 and 550 cycles at 1 C(40℃)and 0.5 C(25℃),respectively.

Numerical and experimental study of the effects of wind turbine operation on sand-dust transport characteristics

Given factors such as reduced land availability for onshore wind farms,wind resource enrichment levels,and costs,there is a growing trend of establishing wind farms in deserts,the Gobi,and other arid regions.Therefore,the relationship between sanddust weather environments and wind turbine operations has garnered significant attention.To investigate the impact of wind turbine wakes on sand-dust transportation,this study employs large eddy simulation to model flow fields,coupled with an actuator line model for simulating rotating blades and a multiphase particle in cell model for simulating sand particles.The research focuses on a horizontal axis wind turbine model and examines the motion and spatiotemporal distribution characteristics of four typical sizes of sand particles in the turbine wake.The findings reveal that sand particles of varying sizes exhibit a spiral settling pattern after traversing the rotating plane of wind turbine blades,influenced by blade shedding vortex and gravity.Sand particles tend to cluster in the peripheries of the vortex cores of low vorticity in the wind turbine wake.The rotation of wind turbines generates a wake vortex structure that causes a significant clustering of sand particles at the tip vortex.As the wake distance increases,the particles that cluster at the turbine's tip gradually spread outward to approximately twice the rotor diameter and then begin to mix with the incoming flow environment.Wind turbines have a noticeable impact on sand-dust transportation,hindering their movement to a significant extent.The average sand-blocking rate exhibits a trend of initially increasing and then decreasing as the wake distance increases.At its peak,the sand-blocking rate reaches an impressive 67.55%.The presence of wind turbines induces the advanced settling of sand particles,resulting in a“triangular”distribution of the deposition within the ground projection area of the wake.

Particulate modification of lithium-ion battery anode materials and electrolytes

Lithium-ion batteries(LIBs)are considered a rechargeable and commercial energy storage device for electronic equipment such as smartphone and electric vehicles.Despite the prospective future of LIBs,unsatisfied electrochemical properties like reversible capacity,cycle ability and coulombic efficiency still hinder their development.High volume expansion rate,uncontrolled Li dendrite growth and unsatisfied solid electrolyte interphase also occur when LIBs are applied in long-time usage.Numerous modification methods such as exploring high-capacity anode/cathode materials,constructing artificial solid electrolyte interphase and improved conductive binders can be adopted to enhance the performances.Among them,particulate modification for LIBs anode and electrolytes is receiving tremendous attraction in the recent work.The method is composed of changing the morphology and particle size of the active materials,also introduce nano-size additives to the main structure.This review emphasizes on introducing and discussing the modification in following aspects:particulate modification on carbon group IVA element anodes,introduction of additives like transition metal oxide nanoparticles into anode and electrolyte materials,dissipate the influence of Li dendrite growth and ameliorate the performances of solid electrolyte interface.This review hopes to be denoted for the future development of LIBs with the comprehensive understanding on the particulate modification.

基于风险点分析之防范一稿多投研究

为了高效、切实地防范学术界一稿多投行为,本文利用风险点分析的方法,对学术期刊出版活动的结构和过程进行检视,排查其中的风险点,并提供相应的补正方案。研究发现在科研诚信教育环节和期刊采编环节存在风险点,提出有关部门应修订科研诚信教育教材,中国知网应升级和开放其"稿件追踪平台"。本文利用管理学方法排查出学术期刊出版活动中多处有关防范一稿多投的风险点,并提供了初具可行性的方案。

社会主义学院学报编辑工作实务规范化初探

《社会主义学院工作条例》(以下简称《条例》)明确指出了要推进社会主义学院工作科学化制度化规范化。社会主义学院学报的编辑工作也是社会主义学院的重要工作之一,如何推进社会主义学院学报编辑工作实务的规范化,是目前很多社会主义学院学报亟待解决的问题。笔者站在一名学报编辑人员的立场上,分别从政治角度和学术角度出发,针对社会主义学院学报在编辑工作实务方面需加强规范之处进行具体分析,希望能为切实推进社会主义学院学报编辑工作实务规范化作出自己的贡献。

De novo identification and quantification of single amino-acid variants in human brain

单个氨基酸的变体(SAV ) 的察觉通常取决于单个核苷酸的多型性(SNP ) 数据库。这里，我们描述发现在 proteome 的 SAV 铺平 SNP 数据的独立人士的一个新奇方法。用定序算法的集体基于 spectrometry 的 de novo，肽候选人被识别并且与理论蛋白质数据库到相比在配对策略下面产生 SAV，它被数据库研究到控制跟随假发现率。在人的大脑纸巾，我们能充满信心地识别知道并且有多样的起源的新奇蛋白质变体。与 DNA/RNA 定序结合了，我们证实 SAV 源于 DNA 变化，拼接的 RNA 选择，和未知 post-transcriptional 机制。而且，在人的大脑纸巾的定量分析揭示 SAV 的几织物特定的微分表情。这条途径提供新奇存取给蛋白质变体的高产量的察觉，它可以为临床的 biomarker 发现和机械学的研究提供潜力。