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Electron-microscopical visualization on the interfacial and crystallographic structures of lithium metal anode

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Chinese Chemical Letters 2024年第6期35卷 26-37页

作者： Jiale Zheng Mei Chen Huadong Yuan jianmin luo Yao Wang Jianwei Nai Xinyong Tao Yujing Liu College of Materials Science and Engineering Zhejiang University of TechnologyHangzhou 310014China College of Mechanical and Energy Engineering Zhejiang University of Science and TechnologyHangzhou 310014China

Lithium(Li)metal anodes(LMAs)have garnered significant attention as a potential solution for developing high-energy density batteries,given their theoretical specific capacity and redox potential.However,safety concerns and internal cycling stability issues originated from uncontrollable Li dendrite growth have impeded the practical application of LMAs.Probing the interface between Li metal and electrolyte is a crucial process that offers valuable insights into the characteristics and regularity of primary circular reactions.To illustrate the intrinsic characteristic of Li metal batteries(LMBs)in spatial and temporal,it is imperative to employ electron microscopes to characterize the structural components distribution of Li with atomic resolution.This paper summarizes the progress in the characterization and analysis of the interfaces in LMBs with electron microscopes based on the principles of electron-matter interactions.Finally,future trends and the potential of electron microscopes are also discussed to advance our understanding of LMBs.

关键词： Li metal anode Electron microscopy Visualization High-resolution Battery

Linker gadolinium as charge channel and singlet oxygen activation site in graphitic carbon nitride for enhancing photocatalytic decomposition of tetracycline

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Journal of Rare Earths 2024年第5期42卷 827-837,I0001页

作者： jianmin luo Wenqin Li Xinglei Wang Eric Lichtfouse Donglan Huang Xiaoyuan Chen Yi Zhang Lejie Zhu Chuanyi Wang College of Chemistry and Civil Engineering Shaoguan UniversityShaoguan512005China Key Laboratory of Pollutant Chemistry and Environmental Treatment College of Chemistry and Environmental ScienceYili Normal UniversityYining 835000China College of Chemistry and Environmental Science Kashi UniversityKashi844006China CNRS IRDINRAEColl FranceCEREGEAix-Marseille UniversityAix en Provence13100France Guangzhou Institute of Industrial Intelligence(GIl) Guangzhou511400China

Reactive oxygen species are essential in photocatalytic water treatment.In this paper,Gd doped carbon nitride(CN)photocatalysts were prepared by simple thermal polymerization for the photocatalytic degradation of tetracycline under visible light irradiation.The photodegradation rate of *** is as high as 95%in 18 min,and the photocatalytic performance is much higher than that of CN.The improvement of photocatalytic performance is mainly attributed to the fact that Gd ion implantation directly provides active sites for oxygen activation and induces the formation of N vacancies.The results of characterizations show that the introduction of Gd in CN can improve the conversion ability of activated oxygen,carrier separation and energy band structure adjustment.Therefore,1.0GdCN photocatalyst can be employed for efficient photocatalytic synthesis of tetracycline.Furthermore,three ways of photocatalytic degradation of tetracycline were revealed by high performance liquid chromatographymass spectrometry.This work provides insights into the doping strategy of CN to improve the production of reactive oxygen species for environmental remediation.

关键词： Photocatalysis Tetracycline Hydrogen peroxide Gd doped CN Singlet oxygen Rare earths

Full-spectrum Bi@SrTiO_(3) for bi-directional promotion effects on photocatalytic redox reaction:Insight into intermediates and mechanism

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Journal of Rare Earths 2024年第5期42卷 917-929,I0004页

作者： Bin Liu Nanhao Zhou Jun Liu Xinglei Wang Peter K.J.Robertson Xiaoyuan Chen Chao Chen jianmin luo Chuanyi Wang School of Chemistry and Civil Engineering Shaoguan UniversityShaoguan512005China Chengdu Customs Technology Center Chengdu610041China Key Laboratory of Pollutant Chemistry and Environmental Treatment College of Chemistry and Environmental ScienceYili Normal UniversityYining835000China School of Chemistry and Chemical Engineering Queen's University BelfastStranmillis RoadBelfastBT95AGUnited Kingdom Guangzhou Institute of Industrial Intelligence(GIII) Guangzhou511400China

The development of full-spectrum photocatalysts active in the near-infrared(NIR)region has gained increasing attention for deleterious pollutant removal.The integration of plasmonic metals with semico nductors is an effective way to widen the light re sponse range of photocatalysts due to the strong light absorption and fast plasmonic energy transfer of the localized surface plasmon resonance(LSPR).In this work,the full-spectrum responsive Bi@SrTiO_(3) was prepared via facile solvothermal chemical reduction.The optimal Bi@SrTiO_(3) achieves exceptional photocatalytic Cr(VI)reduction efficiency and tetracycline degradation,realizing bi-directional promotion effects on redox reaction.According to density functional theory(DFT)simulations,the extraordinary photocatalytic performance is attributed to the tunable builtin electric field(IEF)of the Ohmic contact.The favorable adaptability in real water and high stability of BSTO-25 were proved by experime ntal results.And the po ssible photocatalytic mechanism was proposed based on theoretical calculation and experimental results.Furthermore,the non-toxicity of the BSTO-25 was evaluated by E.coli cultivation,which further proves the feasibility of treating wastewater with BSTO-25.This work provides a new perspective on constructing full-spectrum-driven photocatalysts for applications dealing with environmental remediation.

关键词： Full-spectrum photocatalysts Localized surface plasmon resonance Ohmic contact Cr(Ⅵ)reduction Antibiotic degradation Rare earths

F-doped orthorhombic Nb_(2)O_(5) exposed with 97% (100) facet for fast reversible Liþ-Intercalation

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Green Energy & Environment 2024年第4期9卷 723-731页

作者： Xiaodi Liu Yufeng Tang Dan Zhang Guangyin Liu Xinwei luo Yi Shang Xiu Li jianmin Ma College of Chemistry and Pharmaceutical Engineering Nanyang Normal UniversityNanyang473061China School of Materials and Energy University of Electronic Science and Technology of ChinaChengdu611731China

Orthorhombic Nb_(2)O_(5)(T-Nb_(2)O_(5))is attractive for fast-charging Li-ion batteries,but it is still hard to realize rapid charge transfer kinetics for Li-ion storage.Herein,F-doped T-Nb_(2)O_(5) microﬂowers(F-Nb_(2)O_(5))are rationally synthesized through topotactic conversion.Specifically,F-Nb_(2)O_(5) are assembled by single-crystal nanoﬂakes with nearly 97%exposed(100)facet,which maximizes the exposure of the feasible Li^(+)transport pathways along loosely packed 4g atomic layers to the electrolytes,thus effectively enhancing the Li^(+)-intercalation performance.Besides,the band gap of F-Nb_(2)O_(5) is reduced to 2.87 eV due to the doping of F atoms,leading to enhanced electrical conductivity.The synergetic effects between tailored exposed crystal facets,F-doping,and ultrathin building blocks,speed up the Li^(+)/electron transfer kinetics and improve the pseudocapacitive properties of F-Nb_(2)O_(5).Therefore,F-Nb_(2)O_(5) exhibit superior rate capability(210.8 and 164.9 mAh g^(-1) at 1 and 10 C,respectively)and good long-term 10 C cycling performance(132.7 mAh g^(-1) after 1500 cycles).

关键词： Exposed facets Orthorhombic Nb_(2)O_(5) F-doping Pseudocapacitive intercalation anode Li-ion storage

Graphene-based electrodes and catalysts for electroreduction of CO_(2)to low-carbon alcohols

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Materials Reports(Energy) 2023年第2期3卷 142-153,I0004页

作者： Lei Wang Patrick Lira Guangzhi Hu jianmin luo Zhao Sun Richard Davis Yudai Huang Sam Toan Department of Chemical Engineering University of Minnesota-DuluthDuluthMN55812USA Institute for Ecological Research and Pollution Control of Plateau Lakes School of Ecology and Environmental ScienceYunnan UniversityKunming650504China School of Chemistry and Civil Engineering Shaoguan UniversityShaoguan512005China School of Energy Science and Engineering Central South UniversityChangsha410083China State Key Laboratory of Chemistry and Utilization of Carbon Based Energy Resources College of ChemistryXinjiang UniversityUrumqi830017China

The electrochemical reduction of CO_(2)(CO_(2)ER)into the renewable and sustainable green fuels,such as low-carbon alcohols,is one of several workable strategies.CO_(2)ER can be combined with renewable electricity to transform intermittent energy sources(such as wind,hydro,and solar)into a fuel that can be stored until it is ready to be used.The intrinsic characteristics of the employed catalyst have a significant and substantial effect on the efficiency of CO_(2)ER and the ensuing economic viability.The paradigmatic multicarbon alcohol catalysts should increase the concentration of*CO in the reaction environment,stabilize the key intermediate products during the reaction,and facilitate the C-C coupling interaction.Since graphene has a large surface area and exceptional conductivity,it has been used as a support for active phases(nanoparticles or nanosheets).It is possible for graphene to enhance charge transport and accelerate CO_(2)conversion through its electronic and structural coupling effects.At the interface,a synergy can be produced that improves CO_(2)ER by increasing*CO adsorption,intermediate binding,and stability.This article focuses on recent advancements in graphene-based catalysts that promote CO_(2)ER to alcohols.Likewise,this paper also describes and discusses the key role graphene plays in catalyzing CO_(2)ER into alcohols.Finally,we hope to provide future ideas for the design of graphene-based electrocatalysts.

关键词： Graphene Electrocatalysts CO_(2)reduction Alcohol Electrode

Considerable molecular interactions enable robust electrochemical properties:hydrogen bonds in lithium-ion batteries

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Science China Chemistry 2023年第7期66卷 1905-1923页

作者： Dan Duan Xiaohan Cai Cong Ma Zongxi Lin Yao Wang Jianwei Nai Tiefeng Liu jianmin luo Yujing Liu Xinyong Tao College of Materials Science and Engineering Zhejiang University of TechnologyHangzhou 310014China

Lithium-ion batteries(LIBs)have been in a dominant position in the new energy industry because of their excellent comprehensive performance.The performance of LIBs highly depends on the microstructures of the materials that constitute LIBs.Particularly,the relatively“weak”molecular interactions instead of the common-discussed strong chemical-bonding always affect the structures and the consequent properties of the components in LIBs.As a typical example,the hydrogen bonds,which widely exist inside LIBs,greatly improved the mechanical strength,lithium ion(Li^(+))transport rate and the intrinsic stabilities towards boosting performance of LIBs.This review starts from the interaction force between molecules,and especially summarizes the correlation between the formation of hydrogen bonds and the properties of the typical components in LIBs(cathode,anode,electrolyte,separator).In addition,how the formation of hydrogen bonds affects the performance of LIBs components is discussed.Finally,the strategies of combining hydrogen bonds with LIBs components in the future are prospected,which provide guidance for the rational design of high-performance LIBs.

关键词： hydrogen bonds lithium-ion batteries electrochemical performance

Yield Characteristics of a New High-quality Disease-resistant Wheat Variety Chuanmai 618

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Plant Diseases and Pests 2024年第2期15卷 22-26,31页

作者： jianmin ZHENG Zongjun PU Jijuan LU Jiangtao luo Qingyan DENG Peixun LIU Shizhao LI Crop Research Institute Sichuan Academy of Agricultural Sciences/Environment-Friendly Crop Germplasm Innovation and Genetic Improvement Key Laboratory of Sichuan Province/Key Laboratory of Wheat Biology and Genetic Improvement on Southwestern ChinaMinistry of Agriculture and Rural AffairsChengdu 610066China Sichuan Seed Management Station Chengdu 610041China

[Objectives]The paper was to analyze the yield characteristics of a new high-quality disease-resistant wheat variety Chuanmai 618.[Methods]The yield characteristics of Chuanmai 618 were analyzed using the AMMI model and GGE biplot based on data from a 2-year regional test and a 1-year production test.[Results]The analysis of the AMMI model for the 2-year regional test indicated that Chuanmai 618 had a moderate yield and good stability.During the production test,Chuanmai 618 had an average yield of 450.52 kg/666.7 m^(2),an effective spike of 235700 spike/666.7 m^(2),a 1000-seed weight of 47.93 g,and a kernel number per spike of 47.28.The AMMI analysis sequencing graph showed that the varieties were ranked in the following order:Zhongkemai 1816>Chuanmai 618>Shumai 1958>Chuanyu 42>Mianmai 367>Xikemai 5518.According to the GE analysis,Chuanmai 618 had comparative advantages.[Conclusions]The new wheat variety Chuanmai 618 is a high-quality disease-resistant variety with good yield and stability.

关键词： Chuanmai 618 High quality Disease-resistant AMMI model High yield Stability

Enabling stable sodium metal cycling by sodiophilic interphase in a polymer electrolyte system

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Journal of Energy Chemistry 2021年第12期30卷 305-311,I0007页

作者： Xiaofei Hu Edward Matios Yiwen Zhang Chuanlong Wang jianmin luo Weiyang Li Engineering Drive Thayer School of EngineeringDartmouth CollegeHanoverNH 03755USA

Enabling highly reversible sodium(Na) metal anodes in a polymer electrolyte(PE) system is critical for realizing next-generation batteries with lower cost,higher energy,and improved safety.However,the uneven Na deposition and high Na/PE interphase resistance lead to poor reversibility and short cycle life of Na metal anodes.To tackle these problems,here a variety of metal nanoparticles(M-np,M=Al,Sn,In or Au) are deposited onto copper(Cu) foils to synthesize binder-free M-np@Cu substrates for Na plating/stripping.Notably,the Au-np@Cu substrate provides abundant preferential nucleation/growth sites,decreasing Na nucleation barrier and thus promoting uniform Na deposition.Accordingly,stable Na metal anodes are achieved with high reversible capacities,long cycle life,and high usage of Na.With the Au-np@Cu/Na anode and PE,the full cell using a commercial bulk sulfur cathode exhibits a reversible capacity of>400 mAh g^(-1) with near-100% Coulombic efficiency over 200 cycles.

关键词： Sodium metal Nucleation Sodiophilic interphase Polymer electrolyte Metal nanoparticles

Interfacial structure design of MXene-based nanomaterials for electrochemical energy storage and conversion

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InfoMat 2020年第6期2卷 1057-1076页

作者： jianmin luo Edward Matios Huan Wang Xinyong Tao Weiyang Li Thayer School of Engineering Dartmouth CollegeHanoverNew Hampshire College of Materials Science and Engineering Zhejiang University of TechnologyHangzhouZhejiangChina

2D transition metal carbides,carbonitrides,and nitrides known as MXenes possess high electrical conductivity,large redox active surface area,rich surface chemistry,and tunable structures.Benefiting from these exceptional chemical and physical properties,the applications of MXenes for electrochemical energy storage and conversion have attracted increasing research interests around the world.Notably,the electrochemical performances of MXenes are directly dependent on their synthesis conditions,interfacial chemistries and structural configurations.In this review,we summarize the synthesis techniques of MXenes,as well as the recent advances in the interfacial structure design of MXene-based nanomaterials for electrochemical energy storage and conversion applications.Additionally,we provide an in-depth discussion on the relationship between interfacial structure and electrochemical performance from the perspectives of energy storage and electrocatalysis mechanisms.Finally,the challenges and insights for the future research of interfacial structure design of MXenes are outlined.

关键词： electrocatalysis electrochemical energy storage interlayer space MXene structure design