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Three-dimensional architecture using hollow Cu/C nanofiber interpenetrated with MXenes for high-rate lithium-ion batteries

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Rare Metals 2023年第10期42卷 3378-3386页

作者： Jing-Chong Liu Lin-Lin Ma Shuai Li Lan-Lan Hou Xin-Ran Qi Yong-Qiang Wen Guo-Ping Hu NüWang Yong Zhao Xiao-Xian Zhao Beijing Key Laboratory for Bioengineering and Sensing Technology Daxing Research InstituteSchool of Chemistry and Biological EngineeringUniversity of Science and Technology BeijingBeijing100083China Key Laboratory of Intelligent Textile and Flexible Interconnection of Zhejiang Province Hangzhou310018China Department of Chemistry College of ScienceHebei Agriculture UniversityBaoding071001China School of Chemistry Beihang UniversityBeijing100191China Key Laboratory of Rare Earths Ganjiang Innovation AcademyChinese Academy of SciencesGanzhou341119China

Improving the electron/ion transport ability and alleviating expansion during charging/discharging processes are vital for lithium-ion batteries(LIBs).In this work,a three-dimensional anode was fabricated using conductive hollow carbon-based nano tubes interpenetrated MXene architecture by directing the assembly of flexible electrospun hollow copper/carbon nanotubes and rigid Ti_(3)C_(2)T_(x) MXene nanosheets.The introduction of copper into carbon matrix leads to an improvement of lithium storage owing to the increase of disorder graphite.Additionally,the unique structure of the fabricated electrode provides a cross-network for fast electron diffusion by preventing the stack of nanotubes and MXene nanosheets.Consequently,the optimized electrode exhibits a high initial capacity of 424.45mAh·g^(-1) and maintains at 378.05 mAh·g^(-1) with a current density of 5 A·g^(-1) after 1000 cycles.This strategy of structural and chemical optimization provides new ideas for developing high-performance and durable electrochemical energy storage devices in the future.

关键词： Nanofiber Hollow structure Electrospinning carbon materials Lithium-ion battery

Insights into Enhanced Capacitive Behavior of carbon Cathode for Lithium Ion Capacitors: The Coupling of Pore Size and Graphitization Engineering

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Nano-Micro Letters 2020年第9期12卷 239-257页

作者： Kangyu Zou Peng Cai Baowei Wang Cheng Liu Jiayang Li Tianyun Qiu Guoqiang Zou Hongshuai Hou Xiaobo Ji College of Chemistry and Chemical Engineering Central South UniversityChangsha 410083People’s Republic of China College of Metallurgy and Chemical Engineering Jiangxi University of Science and Technology86 Hongqi RoadGanzhou 341000People’s Republic of China

The lack of methods to modulate intrinsic textures of carbon cathode has seriously hindered the revelation of in-depth relationship between inherent natures and capacitive behaviors,limiting the advancement of lithium ion capacitors(LICs).Here,an orientateddesigned pore size distribution(range from 0.5 to 200 nm)and graphitization engineering strategy of carbon materials through regulating molar ratios of Zn/Co ions has been proposed,which provides an effective platform to deeply evaluate the capacitive behaviors of carbon cathode.Significantly,after the systematical analysis cooperating with experimental result and density functional theory calculation,it is uncovered that the size of solvated PF6-ion is about 1.5 nm.Moreover,the capacitive behaviors of carbon cathode could be enhanced attributed to the controlled pore size of 1.5-3 nm.Triggered with synergistic effect of graphitization and appropriate pore size distribution,optimized carbon cathode(Zn90Co10-APC)displays excellent capacitive performances with a reversible specific capacity of^50 mAh g-1at a current density of 5 A g-1.Furthermore,the assembly pre-lithiated graphite(PLG)//Zn90Co10-APC LIC could deliver a large energy density of 108 Wh kg-1 and a high power density of 150,000 W kg-1 as well as excellent long-term ability with 10,000 cycles.This elaborate work might shed light on the intensive understanding of the improved capacitive behavior in LiPF6 electrolyte and provide a feasible principle for elaborate fabrication of carbon cathodes for LIC systems.

关键词： carbon materials Pore size regulation Graphitization Capacitive behavior Lithium ion capacitor

Scalable solid-phase synthesis of defect-rich graphene for oxygen reduction electrocatalysis

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Green Energy & Environment 2023年第1期8卷 224-232页

作者： Chunxiao Dong Li Yang Cheng Lian Xiaoling Yang Yihua Zhu Hongliang Jiang Chunzhong Li Shanghai Engineering Research Center of Hierarchical Nanomaterials School of Materials Science and EngineeringEast China University of Science and TechnologyShanghai200237China Key Laboratory for Ultrafine materials of Ministry of Education School of Chemical EngineeringEast China University of Science and TechnologyShanghai200237China Institutes of Physical Science and Information Technology Anhui UniversityHefeiAnhui230601China School of Chemistry and Molecular Engineering East China University of Science and TechnologyShanghai200237China

Defect-engineered carbon materials have been emerged as promising electrocatalysts for oxygen reduction reaction(ORR)in metal-air batteries.Developing a facile strategy for the preparation of highly active nanocarbon electrocatalysts remains challenging.Herein,a low-cost and simple route is developed to synthesize defective graphene by pyrolyzing the mixture of glucose and carbon nitride.Molecular dynamics simulations reveal that the graphene formation is ascribed to two-dimensional layered feature of carbon nitride,and high compatibility of carbon nitride/glucose systems.Structural measurements suggest that the graphene possesses rich edge and topological defects.The graphene catalyst exhibits higher power density than commercial Pt/C catalyst in a primary Zn-air battery.Combining experimental results and theoretical thermodynamic analysis,it is identified that graphitic nitrogen-modified topological defects at carbon framework edges are responsible for the decent ORR performance.The strategy presented in this work can be can be scaled up readily to fabricate defective carbon materials.

关键词： carbon materials Electrocatalysis Oxygen reduction reaction Solid-phase synthesis Zn-air battery

Defect Engineering of carbons for Energy Conversion and Storage Applications

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Energy & Environmental materials 2023年第3期6卷 264-285页

作者： Xianyou Luo Heng Zheng Wende Lai Ping Yuan Shengwei Li De Li Yong Chen Guangdong Key Laboratory for Hydrogen Energy Technologies School of Materials Science and Hydrogen EnergyFoshan UniversityFoshan 528000China State Key Laboratory of Marine Resource Utilization in South China Sea Hainan Provincial Key Laboratory of Research on Utilization of Si-Zr-Ti ResourcesHainan UniversityHaikou 570228China Key Laboratory of Advanced Energy materials Chemistry(Ministry of Education) Nankai UniversityTianjin 300071China

Sustainable energy conversion and storage technologies are a vital prerequisite for neutral future carbon.To this end,carbon materials with attractive features,such as tunable pore architecture,good electrical conductivity,outstanding physicochemical stability,abundant resource,and low cost,have used as promising electrode materials for energy conversion and storage.Defect engineering could modulate the structures of carbon materials,thereby affecting their electronic properties.The presence of defects on carbons may lead to asymmetric charge distribution,change in geometrical configuration,and distortion of the electronic structure that may result in unexpected electrochemical performances.In this review,recent advances in defects of carbons used for energy conversion and storage were examined in terms of types,regulation strategies,and fine characterization means of defects.The applications of such carbons in supercapacitors,rechargeable batteries,and electrocatalysis were also discussed.The perspectives toward the development of defect engineering carbons were proposed.In all,novel insights related to improvement in high-performance carbon materials for future energy conversion and storage applications were provided.

关键词： carbon materials defect engineering electrocatalysis rechargeable batteries supercapacitors

Breaking the temperature limit of hydrothermal carbonization of lignocellulosic biomass by decoupling temperature and pressure

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Green Energy & Environment 2023年第4期8卷 1216-1227页

作者： Shijie Yu Xiaoxiao Yang Qinghai Li Yanguo Zhang Hui Zhou Key Laboratory for Thermal Science and Power Engineering of Ministry of Education Beijing Key Laboratory of CO_(2) Utilization and Reduction TechnologyDepartment of Energy and Power EngineeringTsinghua UniversityBeijing100084China

Hydrothermal carbonization(HTC) of lignocellulosic biomass is a promising technology for the production of carbon materials with negative carbon emissions. However, the high reaction temperature and energy consumption have limited the development of HTC technology. In conventional batch reactors, the temperature and pressure are typically coupled at saturated states. In this study, a decoupled temperature and pressure hydrothermal(DTPH) reaction system was developed to decrease the temperature of the HTC reaction of lignocellulosic biomass(rice straw and poplar leaves). The properties of hydrochars were analyzed by scanning electron microscopy(SEM), Fourier transform infrared(FTIR) spectroscopy, X-ray photoelectron spectroscopy(XPS), Raman spectroscopy, X-ray diffraction(XRD), thermogravimetric analyzer(TGA), etc. to propose the reaction mechanism. The results showed that the HTC reaction of lignocellulosic biomass could be realized at a low temperature of 200℃ in the DTPH process, breaking the temperature limit(230℃) in the conventional process. The DTPH method could break the barrier of the crystalline structure of cellulose in the lignocellulosic biomass with high cellulose content, realizing the carbonization of cellulose and hemicellulose with the dehydration, unsaturated bond formation, and aromatization. The produced hydrochar had an appearance of carbon microspheres, with high calorific values, abundant oxygen-containing functional groups, a certain degree of graphitization, and good thermal stability. Cellulose acts not only as a barrier to protect itself and hemicellulose from decomposition, but also as a key precursor for the formation of carbon microspheres. This study shows a promising method for synthesizing carbon materials from lignocellulosic biomass with a carbon-negative effect.

关键词： Biomass Lignocellulose Hydrothermal treatment Hydrochar carbon materials

Two dimensional(2D) graphdiyne-based nanomaterial for bacterial inactivation

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Progress in Natural Science:materials International 2023年第6期33卷 780-788页

作者： Chuanqi Pan Bohua Lu Weihua Li Institute of Chemistry Henan Academy of Sciences High & New Technology Research Center of Henan Academy of Sciences North China University of Water Resources and Electric Power

Infectious diseases caused by pathogenic bacteria and viruses pose a great threat to the ecological environment and the lives and health of humans and animals. Developing efficient bacterial inactivation techniques and nanomaterials prevent the invasion of pathogenic bacteria has become the goal pursued by researchers. carbon materials exhibit enormous potential for bacterial inactivation applications due to their excellent biocompatibility, environmental friendliness, and high antibacterial performance. Graphdiyne(GDY), as a novel twodimensional carbon material, has attracted widespread attention in the fields of biology and antibacterial due to its unique acetylene bonds, easily tunable electronic structure, good biocompatibility and peroxidase-like properties etc. This review summarizes the research progress of GDY and GDY-based nanomaterials, including pristine GDY, graphdiyne oxide(GDYO), heteroatom doped-GDY, and GDY-based composite materials in the field of bacterial inactivation, and discusses the opportunities and challenges faced by GDY-based nanomaterials in the fields of biomedicine and antibacterial in the future.

关键词： GDY carbon materials Nanomaterials Acetylene bonds Bacterial inactivation

A survey of hybrid energy devices based on supercapacitors

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Green Energy & Environment 2023年第4期8卷 972-988页

作者： Dan Gao Zhiling Luo Changhong Liu Shoushan Fan Tsinghua-Foxconn Nanotechnology Research Center and Department of Physics Tsinghua University1Qinghua GardenBeijing100084China Fujian Provincial Key Laboratory of Quantum Manipulation and New Energy materials College of Physics and EnergyFujian Normal UniversityFuzhou350117China

Developing multifunctional energy storage systems with high specific energy, high specific power and long cycling life has been the one of the most important research directions. Compared to batteries and traditional capacitors, supercapacitors possess more balanced performance with both high specific power and long cycle-life. Nevertheless, regular supercapacitors can only achieve energy storage without harvesting energy and the energy density is still not very high compared to batteries. Therefore, combining high specific energy and high specific power,long cycle-life and even fast self-charging into one cell has been a promising direction for future energy storage devices. The multifunctional hybrid supercapacitors like asymmetric supercapacitors, batteries/supercapacitors hybrid devices and self-charging hybrid supercapacitors have been widely studied recently. carbon based electrodes are common materials used in all kinds of energy storage devices due to their fabulous electrical and mechanical properties. In this survey, the research progress of all kinds of hybrid supercapacitors using multiple effects and their working mechanisms are briefly reviewed. And their advantages and disadvantages are discussed. The hybrid supercapacitors have great application potential for portable electronics, wearable devices and implantable devices in the future.

关键词： Hybrid supercapacitors Pseudocapacitors Electric double layer capacitor Self-charging carbon materials

Recent advances in the nanoconfinement of Mg-related hydrogen storage materials:A minor review

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International Journal of Minerals,Metallurgy and materials 2023年第1期30卷 14-24页

作者： Jingjing Zhang Bing Zhang Xiubo Xie Cui Ni Chuanxin Hou Xueqin Sun Xiaoyang Yang Yuping Zhang Hideo Kimura Wei Du School of Environmental and Material Engineering Yantai UniversityYantai 264005China

Hydrogen is an ideal clean energy because of its high calorific value and abundance of sources.However,storing hydrogen in a compact,inexpensive,and safe manner is the main restriction on the extensive utilization of hydrogen energy.Magnesium(Mg)-based hydrogen storage material is considered a reliable solid hydrogen storage material with the advantages of high hydrogen storage capacity(7.6wt%),good performance,and low cost.However,the high thermodynamic stability and slow kinetics of Mg-based hydrogen storage materials have to be overcome.In this paper,we will review the recent advances in the nanoconfinement of Mg-related hydrogen storage materials by loading Mg particles on different supporting materials,including carbons,metal-organic frameworks,and other materials.Perspectives are also provided for designing high-performance Mg-based materials using nanoconfinement.

关键词： magnesium-based materials hydrogen storage nanoconfinement carbon materials

In situ growth of NiSe_(2) nanocrystalline array on graphene for efficient hydrogen evolution reaction

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Frontiers in Energy 2022年第4期16卷 595-600页

作者： Shuai JI Changgan LAI Huan ZHOU Helin WANG Ling MA Cong WANG Keying ZHANG Fajun LI Lixu LEI School of Chemistry and Chemical Engineering Southeast UniversityNanjing 211189China School of Chemistry and Chemical Engineering Suzhou UniversitySuzhou 234000China Key Laboratory of Spin Electron and Nanomaterials of Anhui Higher Education Institutes Suzhou UniversitySuzhou 234000China

Nickel selenide electrocatalysts for hydrogen evolution reaction(HER)with a high efficiency and a lowcost have a significant potential in the development of water splitting.However,the inferiority of the high overpotential and poor stability restricts their practical applications.Herein,a composite nanostructure consists of ultrasmall NiSe_(2) nanocrystals embedded on graphene by microwave reaction is reported.The prepared NiSe_(2)/reduced graphite oxide(rGO)electrocatalyst exhibited a high HER activity with an overpotential of 158 mV at a current density of 10 mA/cm^(2) and a corresponding moderate Tafel slope of 56 mV/dec in alkaline electrolyte.In addition,a high retention of electrochemical properties(approximately 100%)was demonstrated with an unchangeable microstructure after 100 h of continuous operation.

关键词： nickel selenide carbon materials nanoparticles hydrogen evolution reaction(HER) microwave reaction