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Next generation of power electronic-converter application for energy-conversion and storage units and systems

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Clean Energy 2019年第4期3卷 307-315页

作者： Kasper Luthje Jørgensen Zhe Zhang Michael A.EAndersen Department of Electrical Engineering Technical University of DenmarkElektrovej 325DK-2800 Kongens LyngbyDenmark

By a rearrangement of the traditional supply-converter-load system connection,partial-power-processing-based converters can be used to achieve a reduction in size and cost,increase in system efficiency and lower device power rating.The concept is promising for different applications such as photovoltaic arrays,electric vehicles and electrolysis.For photovoltaic applications,it can drive each cell in the array to its maximum power point with a relatively smaller converter;for electric-vehicle applications,both an onboard charger with reduced weight and improved efficiency as well as a fast charger station handling higher power can be considered.By showing different examples of partial-power-processing application for energy-conversion and storage units and systems,this paper discusses key limitations of partial-power-processing and related improvements from different perspectives to show the potential in future power electronic systems.

关键词： batteries DC-DC converter differential power processing fuel cells hydrogen production partial-power processing wide band-gap devices fractional power processing

Selective nitrogen doping on carbon cloth to enhance the performance of zinc anode

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Chinese Chemical Letters 2021年第3期32卷 1095-1100页

作者： Lei Wang Guilan Fan Jiuding Liu Le Zhang Meng Yu Zhenhua Yan Fangyi Cheng Key Laboratory of Advanced Energy Materials Chemistry(Ministry of Education) Renewable Energy Conversion and Storage CenterCollege of ChemistryNankai UniversityTianjin 300071China

Metallic zinc is attractive anode material of rechargeable aqueous Zn-based batteries due to its ambient stability,high volumetric capacity,and abundant reserves.Nonetheless,Zn anodes suffer from issues such as low coulombic efficiency(CE),large polarization and dendrite formation.Herein,uniform Zn electrodeposition is reported on carbon substrates by selective nitrogen doping.Combined experimental and theoretical investigations demonstrate that pyrrolic and pyridinic nitrogen doped in carbon play beneficial effect as zinc-philic sites to direct nucleation and growth of metallic Zn,while negligible effect is observed for graphite nitrogen in Zn plating.The carbon cloth with modified amount of doped pyrrolic and pyridinic nitrogen stabilizes Zn plating/stripping with 99.3%CE after 300 cycles and significantly increases the deliverable capacity at high depth of charge and discharge compared to undoped carbon substrate and Zn foil.This work provides a better understanding of heteroatom doping effect in design and preparation of stable 3 D carbon-supported zinc anode.

关键词： Zinc batteries Nitrogen doping Carbon substrate Electrodeposition

Role of MXene surface terminations in electrochemical energy storage:A review

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Chinese Chemical Letters 2021年第9期32卷 2648-2658页

作者： Zhuoheng Bao Chengjie Lu Xin Cao Peigen Zhang Li Yang Heng Zhang Dawei Sha Wei He Wei Zhang Long Pan Zhengming Sun School of Materials Science and Engineering Southeast UniversityNanjing 211189China

MXenes are a group of recently discovered 2D materials and have attracted extensive attention since their first report in 2011;they have shown excellent prospects for energy storage applications owing to their unique layered microstructure and tunable electrical properties.One major feature of MXenes is their tailorable surface terminations(e.g.,-F,-O,-OH).Numerous studies have indicated that the composition of the surface terminations can significantly impact the electrochemical properties of MXenes.Nonetheless,the underlying mechanisms are still poorly understood,mainly because of the difficulties in quantitative analysis and characterization.This review summarizes the latest research progress on MXene terminations.First,a systematic introduction to the approaches for preparing MXenes is presented,which generally dominates the surface terminations.Then,theoretical and experimental efforts regarding the surface terminations are discussed,and the influence of surface terminations on the electronic and electrochemical properties of MXenes are generalized.Finally,we present the significance and research prospects of MXene terminations.We expect this review to encourage research on MXenes and provide guidance for usingthese materials for batteries and supercapacitors.

关键词： MXene Surface terminations Energy storage First-principles calculation batteries Supercapacitors

A Review on Applications of Layered Phosphorus in Energy Storage

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Transactions of Tianjin University 2020年第2期26卷 104-126页

作者： Cheng Liu Yinghao Wang Jie Sun Aibing Chen Key Laboratory for Green Chemical Technology of Ministry of Education School of Chemical Engineering and TechnologyTianjin UniversityTianjin 300072China State Key Laboratory of Organic–Inorganic Composites Beijing University of Chemical TechnologyBeijing 100029China College of Chemical and Pharmaceutical Engineering Hebei University of Science and TechnologyShijiazhuang 050018China

Phosphorus in energy storage has received widespread attention in recent years. Both the high specific capacity and ion mobility of phosphorus may lead to a breakthrough in energy storage materials. Black phosphorus, an allotrope of phosphorus, has a sheet-like structure similar to graphite. In this review, we describe the structure and properties of black phosphorus and characteristics of the conductive electrode material, including theoretical calculation and analysis. The research progress in various ion batteries, including lithium-sulfur batteries, lithium–air batteries, and supercapacitors, is summarized according to the introduction of black phosphorus materials in different electrochemical applications. Among them, with the introduction of black phosphorus in lithium-ion batteries and sodium-ion batteries, the research on the properties of black phosphorus and carbon composite is introduced. Based on the summary, the future development trend and potential of black phosphorus materials in the field of electrochemistry are analyzed.

关键词： Layered phosphorus Topological construction batteries Supercapacitor

Recent advances in metal-organic frameworks for lithium metal anode protection

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Chinese Chemical Letters 2020年第3期31卷 609-616页

作者： Ying Du Xing Gao Siwu Li Lu Wang Bo Wang Beijing Key Laboratory of Photoelectronic/Electrophotonic Conversion Materials Key Laboratory of Cluster ScienceMinistry of EducationSchool of Chemistryand Chemical EngineeringBeijing Institute of TechnologyBeijing 100081China

The lithium metal battery has been considered as a promising candidate for next generation batteries.However,safety concerns caused by uncontrollable lithium dendrite growth on lithium anode are severely hampering the commercial application.Metal-organic frameworks(MOFs)become one of the most attractive materials due to the high porosity,structural designability and tunability.With unique open channels and pores as well as functional components in MOFs,the transportation and deposition of lithium ions can be regulated,which leads to enhanced electrochemical prope rties.Various strategies for lithium metal protection are proposed in recent wo rks on applications of MOFs in lithium metal batteries.In this review,we highlight latest key approaches in this field and discuss the prospects for MOFs in advanced Li anodes.

关键词： Metal-organic frameworks Li anode Lithium metal batteries Li dendrite Protection

An Improved Method to Prepare FePO4 by Introduction of Na3PO4 and Its Usage for Fabricating LiFePO4

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Journal of Wuhan University of Technology(Materials Science) 2019年第5期34卷 1097-1102页

作者：司秀荣 LI Min FU Xu Civil Engineering Department North China Institute of Aerospace EngineeringLangfang 065000China Hebei ANZ New Energy Tech.Co. Ltd.Langfang 065000China

A LiFePO4/C composite was synthesized by a simple solid-state reaction method using glucose as reductive agent and carbon source and FePO4 as precursor, which was prepared by introduction of Na3PO4 as phosphorus source and pH regulator in order to pursue lower cost and environmental protection. The structure and morphology of FePO4 and LiFePO4/C were investigated by X-ray diffraction(XRD) and scanning electron microscopy(SEM). Furthermore, electrochemical performance of LiFePO4/C was investigated by galvanostatic charge–discharge tests and cyclicvoltammogram(CV). The results indicate that FePO4 obtained has a small particle size and uniform particle distribution, which is demonstrated to be applicable as the iron source to synthesize LiFePO4/C. Prepared LiFePO4/C shows an excellent rate capability and cycle performance. At rates of 0.1 C, 0.2 C, 1 C and 2 C, the initial discharge capacities of 161, 158, 145 and 120 mAh/g were achieved, respectively and the discharge capacity is 154, 153, 140 and 116 mAh/g after 400 cycles. The employed method of preparing FePO4 by introduction of Na3PO4 has advantages such as low cost, safe raw material, environmental benign and recyclable products, which is suitable for industrial production.

关键词： lithium ion batteries cathode LiFePO4 FePO4

Biomass derived porous nitrogen doped carbon for electrochemical devices

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Green Energy & Environment 2017年第2期2卷 84-99页

作者： Litao Yan Jiuling Yu Jessica Houston Nancy Flores Hongmei Luo Department of Chemical and Materials Engineering New Mexico State University Extension Family Consumer Science New Mexico State University

Biomass derived porous nanostructured nitrogen doped carbon(PNC) has been extensively investigated as the electrode material for electrochemical catalytic reactions and rechargeable batteries. Biomass with and without containing nitrogen could be designed and optimized to prepare PNC via hydrothermal carbonization, pyrolysis, and other methods. The presence of nitrogen in carbon can provide more active sites for ion absorption, improve the electronic conductivity, increase the bonding between carbon and sulfur, and enhance the electrochemical catalytic reaction. The synthetic methods of natural biomass derived PNC, heteroatomic co-or tri-doping into biomass derived carbon and the application of biomass derived PNC in rechargeable Li/Na batteries, high energy density Li-S batteries, supercapacitors, metal-air batteries and electrochemical catalytic reaction(oxygen reduction and evolution reactions, hydrogen evolution reaction) are summarized and discussed in this review. Biomass derived PNCs deliver high performance electrochemical storage properties for rechargeable batteries/supercapacitors and superior electrochemical catalytic performance toward hydrogen evolution, oxygen reduction and evolution, as promising electrodes for electrochemical devices including battery technologies, fuel cell and electrolyzer.

关键词： Biomass Nitrogen doped carbon batteries Fuel cell Electrolyzer

Versatile zero- to three-dimensional carbon for electrochemical energy storage

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Carbon Energy 2021年第6期3卷 895-915页

作者： Yuyue Zhao Yunlu Zhang Ying Wang Daxian Cao Xiao Sun Hongli Zhu Department of Mechanical and Industrial Engineering Northeastern UniversityBostonMassachusettsUSA

Secondary batteries have been widely developed and used in various fields,such as large-scale energy storage,portable electronics,and electric vehicles.Carbon-based materials have attracted considerable attention due to their abundance,environmental friendliness,tunable structure,and excellent chemical stability.Beyond the commercial carbon for batteries and supercapacitors,many studies focused on advanced and multifunctional carbon with various structures for electrochemical energy storage.This review summarizes the zero-to three-dimensional carbon-based materials and reviews their various electrochemical applications based on their structural characteristics.The importance of carbon structures and the relationship between materials'structures and electrochemical performance are discussed.Then,the prospects and potential challenges of using advanced carbon to formulate designs and develop novel carbonaceous materials with high electrochemical performance are further discussed.

关键词： batteries carbon conductivity energy storage structural designs supercapacitor

A Structural and Morphological Study of LiCo_1-XSm_XO_Y Powders Obtained by the Sol-Gel Method

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Advances in Nanoparticles 2022年第1期11卷 1-12页

作者： Víctor H. Colín Calderón Antonieta García Murillo Felipe de Jesus Carrillo Romo Arturo Cervantes Tobón Instituto Politécnico Nacional CIITEC Cerrada de Cecati s/n Azcapotzalco Santa Catarina México Instituto Politécnico Nacional-ESIQIE Av. Instituto Politécnico Nacional s/n. Mexico City México

In this study, the synthesis of LiCo1-XSmXOy powders (X = 0.002, 0.004, 0.006, 0.008, and 0.1) by the sol-gel method and the influence of Sm on their structural and morphological properties is reported for the first time. The results of x-ray diffraction (XRD) studies show that LiCoO2 powders synthesized at temperatures up to 700°C present a characteristic hexagonal crystalline phase of the α-NaFeO2 type (space group R-3m), revealing a shift in the (0 0 3) Bragg reflection, which reflects the presence of Sm in the crystalline structure. The morphology was spheroidal and, on average, 122 nm in size. Based on the data obtained, LiCo1-XSmXOy powders (X = 0.002, 0.004, 0.006, 0.008, and 0.1) show promise as a material for use in the cathodes of lithium-ion batteries.

关键词： Cathode batteries Samarium Sol-Gel Nanoparticles