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Lithium-induced graphene layer containing Li_(3)P alloy phase to achieve ultra-stable electrode interface for lithium metal anode

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Rare Metals 2024年第2期43卷 562-574页

作者： Jia-Xin Chen Guo-Qiang Zhang Xian-Ying Qin kui lin Zi-Jin Yang Ge-Meng Liang Yue Xia Guo-Bin Zhang Hai-Kun Wu Qiu-Chan Cai Hai lin Bao-Hua Li Shenzhen Key Laboratory on Power Battery Safety Research and Shenzhen Geim Graphene Center Tsinghua Shenzhen International Graduate SchoolShenzhen518055China Shenzhen Graphene Innovation Center Co. Ltd.Shenzhen518107China School of Chemical Engineering and Advanced Materials The University of AdelaideAdelaideSA5005Australia Department of Chemistry City University of Hong KongHong Kong990077China

Uncontrolled growth of lithium dendrite will lead to low Coulombic efficiency and poor cycle stability,which hinders the commercialization of lithium metal batteries.Herein,a novel modified lithium anode with reduced graphene oxide conductive network containing trace lithiophilic phosphorus(P-rGO/Cu)is prepared by electrospraying technique combined with heat treatment process.The rGO layer has a concave and undulating conductive structure,which can significantly improve the effective electrical contact between lithium metal and the current collector,speed up the kinetics of interfacial electron transport and reaction,and improve the resistance of the negative electrode to the internal stress caused by volume change of the lithium,which is advantageous for the stability of the SEI film.The extremely small and uniformly distributed red phosphorus element avoids the volume change caused by lithiation to the maximum extent.Lithiophilic two-phase compound Li_(3)P obtained by alloying P with Li can directionally induce the homogeneous nucleation and dense deposition of lithium metal,address the issue of lithium dendrites and extend the cycle life of the batteries.The obtained P-rGO/Cu exhibits excellent electrochemical performance with an average Coulombic efficiency(CE)of 98%at a current density of 1 mA·cm^(−2) for 400 cycles,and the capacity retention rate of the full cell matched with lithium iron phosphate(LFP)is 83%after 400 cycles at 1C.

关键词： Lithium anode Dendrite-free Lithiophilicity Induced nucleation deposition

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Identification of clade-wide putative cis-regulatory elements from conserved non-coding sequences in Cucurbitaceae genomes

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Horticulture Research 2023年第4期10卷 238-248页

作者： Hongtao Song Qi Wang Zhonghua Zhang kui lin Erli Pang MOE Key Laboratory for Biodiversity Science and Ecological Engineering and Beijing Key Laboratory of Gene Resource and Molecular Development College of Life SciencesBeijing Normal UniversityBeijing 100875China College of Horticulture Qingdao Agricultural UniversityQingdao 266109China

Cis-regulatory elements regulate gene expression and play an essential role in the development and physiology of organisms.Many conserved non-coding sequences(CNSs)function as cis-regulatory elements.They control the development of various lineages.How-ever,predicting clade-wide cis-regulatory elements across several closely related species remains challenging.Based on the relationship between CNSs and cis-regulatory elements,we present a computational approach that predicts the clade-wide putative cis-regulatory elements in 12 Cucurbitaceae genomes.Using 12-way whole-genome alignment,we first obtained 632112 CNSs in Cucurbitaceae.Next,we identified 16552 Cucurbitaceae-wide cis-regulatory elements based on collinearity among all 12 Cucurbitaceae plants.Furthermore,we predicted 3271 potential regulatory pairs in the cucumber genome,of which 98 were verified using integrative RNA sequencing and ChIP sequencing datasets from samples collected during various fruit development stages.The CNSs,Cucurbitaceae-wide cis-regulatory elements,and their target genes are accessible at http://***/cisRCNEs_cucurbit/.These elements are valuable resources for functionally annotating CNSs and their regulatory roles in Cucurbitaceae genomes.

关键词： elements conserved sequences

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基于改进T-B法的宽带高斯过程疲劳损伤分析

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船舶力学 2024年第2期28卷 261-272页

作者：袁奎霖孙卓成大连理工大学工业装备结构分析国家重点实验室船舶工程学院辽宁大连116024

针对宽带高斯随机应力过程造成的疲劳损伤问题,本文提出一种基于改进Tovo-Benasciutti(T-B)法的疲劳损伤频域分析方法。通过不同参数形式的功率谱进行时域的疲劳损伤分析,针对T-B法中的关键参数bTB提出一个新的非线性函数模型。与原T-B... 详细信息

针对宽带高斯随机应力过程造成的疲劳损伤问题,本文提出一种基于改进Tovo-Benasciutti(T-B)法的疲劳损伤频域分析方法。通过不同参数形式的功率谱进行时域的疲劳损伤分析,针对T-B法中的关键参数bTB提出一个新的非线性函数模型。与原T-B法相比,新提出的函数模型bMTB可以考虑S-N曲线斜率参数m的影响,并以此为基础提出基于改进T-B法的疲劳损伤分析方法。以时域的雨流计数法结果作为基准,分别采用参数化功率谱和真实响应谱进行数值试验,并与现有的多种宽带高斯疲劳损伤分析方法进行对比,验证本文所提出的改进T-B法的准确性和适用性。

关键词：宽带高斯随机过程疲劳损伤改进T-B谱方法数值模拟

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Commercially Viable Hybrid Li-Ion/Metal Batteries with High Energy Density Realized by Symbiotic Anode and Prelithiated Cathode

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Nano-Micro Letters 2022年第9期14卷 174-186页

作者： kui lin Xiaofu Xu Xianying Qin Ming Liu Liang Zhao Zijin Yang Qi Liu Yonghuang Ye Guohua Chen Feiyu Kang Baohua Li Shenzhen Key Laboratory on Power Battery Safety Research and Shenzhen Geim Graphene Center Tsinghua Shenzhen International Graduate SchoolShenzhen 518055People’s Republic of China School of Materials Science and Engineering Tsinghua UniversityBeijing 100084People’s Republic of China Contemporary Amperex Technology Co.Ltd. Ningde 352100People’s Republic of China Shenzhen Graphene Innovation Center Co.Ltd. Shenzhen 518055People’s Republic of China College of Materials Science and Engineering Hunan UniversityChangsha 410082People’s Republic of China Department of Mechanical Engineering The Hong Kong Polytechnic UniversityHong Kong 999077People’s Republic of China

The energy density of commercial lithium(Li)ion batteries with graphite anode is reaching the limit.It is believed that directly utilizing Li metal as anode without a host could enhance the battery’s energy density to the maximum extent.However,the poor reversibility and infinite volume change of Li metal hinder the realistic implementation of Li metal in battery community.Herein,a commercially viable hybrid Li-ion/metal battery is realized by a coordinated strategy of symbiotic anode and prelithiated cathode.To be specific,a scalable template-removal method is developed to fabricate the porous graphite layer(PGL),which acts as a symbiotic host for Li ion intercalation and subsequent Li metal deposition due to the enhanced lithiophilicity and sufficient ion-conducting pathways.A continuous dissolution-deintercalation mechanism during delithiation process further ensures the elimination of dead Li.As a result,when the excess plating Li reaches 30%,the PGL could deliver an ultrahigh average Coulombic efficiency of 99.5% for 180 cycles with a capacity of 2.48 m Ah cm^(-2) in traditional carbonate electrolyte.Meanwhile,an air-stable recrystallized lithium oxalate with high specific capacity(514.3 m Ah g^(-1))and moderate operating potential(4.7-5.0 V)is introduced as a sacrificial cathode to compensate the initial loss and provide Li source for subsequent cycles.Based on the prelithiated cathode and initial Li-free symbiotic anode,under a practical-level3 m Ah capacity,the assembled hybrid Li-ion/metal full cell with a P/N ratio(capacity ratio of Li Ni_(0.8)Co_(0.1)Mn_(0.1)O_(2) to graphite)of 1.3exhibits significantly improved capacity retention after 300 cycles,indicating its great potential for high-energy-density Li batteries.

关键词： Hybrid lithium-ion/metal battery Symbiotic anode Porous graphite layer Cathode prelithiation Lithium oxalate

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TiO_(2)/Cu_(2)O heterostructure enabling selective and uniform lithium deposition towards stable lithium metal anodes

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Nano Research 2023年第4期16卷 4917-4925页

作者： lingyan Ruan Xianying Qin kui lin Zijin Yang Qiuchan Cai Tong Li Fangting Wu Feiyu Kang Baohua Li Shenzhen Key Laboratory on Power Battery Safety Research and Shenzhen Geim Graphene Center Tsinghua Shenzhen International Graduate SchoolShenzhen 518055China School of Materials Science and Engineering Tsinghua UniversityBeijing 100084China Shenzhen Graphene Innovation Center Co.Ltd. Shenzhen 518107China

Lithium(Li)metal is the ultimate anode choice for next generation high energy density batteries.However,the high nucleation energy barrier and nonuniform electric field distribution,as well as huge volume expansion,lead to the uncontrollable growth of Li dendrites and poor utilization of Li metal,which hinders its practical application.Herein,titanium dioxide/cuprous oxide(TiO_(2)/Cu_(2)O)heterostructure is constructed on the rimous skeleton of Cu mesh,and the heterostructure decorated rimous Cu mesh(H-CM)can act as both current collector and host for dendrite-free Li metal anode.The TiO_(2)/Cu_(2)O heterostructure realizes selective Li nucleation by nano TiO_(2)and then induces fast and uniform Li conduction with the aid of heterostructure interface and nano Cu_(2)O contributing to dendrite-free Li deposition.While the internal and external space of rimous skeletons in H-CM is used to accommodate the deposited Li and buffer its volume change.Therefore,the cycling reversibility of the derived Li metal anode in H-CM is improved to a high Coulombic efficiency of 98.8%for more than 350 cycles at a current density of 1 mA·cm−2,and 1,000 h(equals to 500 cycles)stable repeated Li plating/stripping can be operated in a symmetric cell.Furthermore,full cells with limited Li anode and high loading LiFePO4 cathode present excellent cycling and rate performances.

关键词： lithium metal anode titanium dioxide/cuprous oxide(TiO2/Cu2O)heterostructure Cu mesh selective deposition dendritefree

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Self-template synthesis of double-layered porous nanotubes with spatially separated photoredox surfaces for efficient photocatalytic hydrogen production

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Science Bulletin 2018年第10期63卷 601-608页

作者： Yani Xin Yi Huang kui lin Yifu Yu Bin Zhang Department of Chemistry School of Science and Tianfin Key Laboratory of Molecular Optoelectronic Science tianjin University and Collaborative innovation Center of Chemical Science and Engineering (Tianjin) tianjin 300072China Analysis Center School of Materials Science and EngineeringTianjin University Tianjin 300072China

Improving charge carriers separation to achieve high photoconversion efficiency in heterogeneous photocatalysts is highly desirable.Herein,heterostructured ZnS@CdS double-layered porous nanotubes(PNTs),in which the spatially separated reduction and oxidation reaction sites lie on the outer and inner shell,respectively,are fabricated through a robust self-template conversion strategy.After selective photo-deposition of Ni and CoO_x as dual cocatalysts,Ni nanoparticles as electron collectors and reduction reaction sites are loaded on the outer shell,while CoO_x nanoparticles as hole collectors and oxidation reaction sites are loaded on the inner shells.As a result,a novel CoO_x/ZnS@CdS/Ni photocatalyst is obtained and shows high visible-light-driven photocatalytic hydrogen production activity owing to the synergistic effect of self-template-derived thin mesoporous heterojunctions and photo-depositionderived spatially separated dual cocatalysts,which can significantly provide driving force for the ordered transfer of photogenerated electrons and holes toward opposite direction and promote the surface catalytic reaction.Additionally,the facile strategy can be broadened to the preparation of CoO_x/ZnSe@CdSe/NiPNTs with enhanced photocatalytic activity.

关键词：模板合成空间多孔生产光催化剂氧化反应氢 PNT

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Coexistence of nearly neutral species

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Journal of Plant Ecology 2012年第1期5卷 72-81页

作者： Fangliang He Da-Yong Zhang kui lin Department of Renewable Resources University of AlbertaEdmontonAlbertaCanada T6G 2H1 SYSU-Alberta Joint Lab for Biodiversity Conservation State Key Laboratory of BiocontrolSun Yat-sen UniversityGuangzhou 510275China State Key Laboratory of Earth Surface Processes and Resource Ecology and MOE Key Laboratory of Biodiversity Sciences and Ecological Engineering Beijing Normal UniversityBeijing100875 China

Aims The neutral theory of biodiversity provides a powerful framework for modeling macroecological patterns and interpreting species assemblages.However,there remain several unsolved problems,including the effect of relaxing the assumption of strict neutrality to allow for empirically observed variation in vital rates and the‘problem of time’—empirically measured coexistence times are much shorter than the prediction of the strictly neutral drift model.Here,we develop a nearly neutral model that allows for differential birth and death rates of species.This model provides an approach to study species coexistence away from strict neutrality.Methods Based on Moran’s neutral model,which assumes all species in a community have the same competitive ability and have identical birth and death rates,we developed a model that includes birth–death trade-off but excludes speciation.This model describes a wide range of asymmetry from strictly neutral to nearly neutral to far from neutral and is useful for analyzing the effect of drift on species coexistence.Specifically,we analyzed the effects of the birth–death trade-off on the time and probability of species coexistence and quantified the loss of biodiversity(as measured by Simpson’s diversity)due to drift by varying species birth and death rates.Important Findings We found(i)a birth–death trade-off operating as an equalizing force driven by demographic stochasticity promotes the coexistence of nearly neutral species.Species near demographic trade-offs(i.***.fitness equivalence)can coexist even longer than that predicted by the strictly neutral model;(ii)the effect of birth rates on species coexistence is very similar to that of death rates,but their compensatory effects are not completely symmetric;(iii)ecological drift over time produces a march to fixation.Trade-off-based neutral communities lose diversity more slowly than the strictly neutral community,while non-neutral communities lose diversity much more rapidly;and(iv)nearly neutral systems have substantially shorter t

关键词： birth rate ecological drift death rate demographic trade-off nearly neutral theory probability of extinction time of coexistence

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Simulation of epitaxial growth on convex substrate using phase field crystal method

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Frontiers of Materials Science 2014年第2期8卷 185-192页

作者： Ying-Jun GAO Li-lin HUANG Qian-Qian DENG kui lin Chuang-Gao HUANG College of Physical Science and Engineering Guangxi University Nanning 530004 China Ministry Key Laboratory for Non-Ferrous Metal and Featured Materials Nanning 530004 China

Phase field crystal （PFC） model is employed to simulate the process of growth of epitaxial layer on plane-convex substrate with a lattice mismatch and a small inclination angle. The variation of the systematic free energy, the total atomic number of the epitaxial layer, and the effect of the curvature and the angle of the substrate are analyzed. The results show that when the surface of the substrate is plane, the free energy increases with the increase of the substrate inclination angle, and also the total atomic number of the epitaxial layer increases; while the surface of the substrate is convex, the free energy decreases with the increase of substrate angle and so also the total atomic number of the epitaxial layer decrease. This is the reason that the frontier of surface of epitaxial layer changes from the step bunching to the hill-and-valley facet structure with the increasing of the inclination angle of convex substrate. These results are in good agreement with the other method results.

关键词： heteroepitaxy phase field crystal （PFC） convex substrate atomic number

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三教论衡视野下的《十门辩惑论》——以复礼护法高僧身份为核心

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五台山研究 2024年第1期 15-20页

作者：刘林魁范子依宝鸡文理学院文学与新闻传播学院陕西宝鸡721016

《十门辩惑论》是复礼回应权无二《释典稽疑》的一部佛学著作。复礼为长于文学的译经高僧,年岁与权无二接近。《释典稽疑》中的问题是佛教入门者常见的困惑,复礼对权无二的回应多方便权教之法,二人间的交流不具备较胜的性质。从三教论... 详细信息

《十门辩惑论》是复礼回应权无二《释典稽疑》的一部佛学著作。复礼为长于文学的译经高僧,年岁与权无二接近。《释典稽疑》中的问题是佛教入门者常见的困惑,复礼对权无二的回应多方便权教之法,二人间的交流不具备较胜的性质。从三教论衡的发展历史来看,《释典稽疑》质疑佛教的路径、问题,可能为东晋南北朝道教徒经常采用。因此,《十门辩惑论》可与道教徒构成跨越时空的对话。《十门辩惑论》的这一弘法价值,在智升《开元释教录》中被肯定称颂。北宋赞宁《宋高僧传》更将复礼归入“护法”高僧中,使复礼的译经僧身份变成了护法僧的陪衬。由此,历代大藏经就收录了一部义学水平并不高深的护法著作。复礼身份及《十门辨惑论》定位的转变,与唐五代中国化佛教的发展息息相关。

关键词：复礼《十门辩惑论》护法三教论衡

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基于磁性金属有机骨架材料的固相萃取电感耦合等离子体质谱法测定环境水中的重金属元素

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分析试验室 2024年第4期43卷 476-481页

作者：王意邹昊彤薛涛刘洋林奎李方邓小娟天津大学分析测试中心天津300072 天津大学材料学院天津300072

利用水热反应,成功合成了一种功能化的金属有机骨架材料,磁性MIL-101(Fe),并将其用作磁性固相萃取(MSPE)吸附剂,与电感耦合等离子体质谱(ICP-MS)联用,实现高效、灵敏的痕量重金属离子测定。利用扫描电子显微镜、透射电子显微镜、 X射线... 详细信息

利用水热反应,成功合成了一种功能化的金属有机骨架材料,磁性MIL-101(Fe),并将其用作磁性固相萃取(MSPE)吸附剂,与电感耦合等离子体质谱(ICP-MS)联用,实现高效、灵敏的痕量重金属离子测定。利用扫描电子显微镜、透射电子显微镜、 X射线衍射和X射线光电子能谱对磁性MIL-101(Fe)进行了表征,并通过间歇吸附实验优化了溶液pH、吸附时间和解吸时间等萃取参数。结果表明,所合成的MIL-101(Fe)磁性固相萃取剂具有良好的晶体结构和表面功能化纳米颗粒。在优化实验条件下,所建立的MSPE-ICP-MS方法线性范围为0.5~500μg/L, As(Ⅲ), Pb(Ⅱ)和Cu(Ⅱ)的检出限为0.177~0.301μg/L,相对标准偏差为1.7%~3.2%,在连续7次循环使用后回收率仍可达82%。该方法用于环境水样中痕量重金属离子的测定,加标回收率为90.0%~113.2%,可用于环境水样中痕量重金属检测。

关键词：磁性固相萃取电感耦合等离子体质谱金属有机骨架材料重金属离子

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