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Nickel sulfide-based energy storage materials for high-performance electrochemical capacitors

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Rare Metals 2021年第2期40卷 353-373页

作者： Ramyakrishna Pothu Ravi Bolagam Qing-Hong Wang Wei Ni Jin-Feng Cai Xiao-Xin Peng Yue-Zhan Feng Jian-Min Ma School of Physics and Electronics Hunan UniversityChangsha410082China School of Chemistry and materials Science Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional MaterialsJiangsu Normal UniversityXuzhou221116China Institute for Advanced Study Chengdu UniversityChengdu610106China Faculty of Technology University of OuluOulu90014Finland Yiyang Wanjingyuan Electronics Co. Ltd.Yiyang413000China Key Laboratory of materials Processing and Mold(Zhengzhou University) Ministry of EducationZhengzhou UniversityZhengzhou450002China

Supercapacitors are favorable energy storage devices in the field of emerging energy technologies with high power density,excellent cycle stability and environmental *** performance of supercapacitors is definitively influenced by the electrode *** sulfides have attracted extensive interest in recent years due to their specific merits for supercapacitor ***,the distribution of electrochemically active sites critically limits their electrochemical *** improvements have been achieved through various strategies such as building synergetic structures with conductive substrates,enhancing the active sites by nanocrystallization and constructing nanohybrid architecture with other electrode *** article overviews the progress in the reasonable design and preparation of nickel sulfides and their composite electrodes combined with various bifunctional electric double-layer capacitor(EDLC)-based substances(e.g.,graphene,hollow carbon)and pseudocapacitive materials(e.g.,transition-metal oxides,sulfides,nitrides).Moreover,the corresponding electrochemical performances,reaction mechanisms,emerging challenges and future perspectives are briefly discussed and summarized.

关键词： Supercapacitors Nickel sulfides Hybrid structures energy storage materials Pseudocapacitance

Understanding the influence of crystal packing density on electrochemical energy storage materials

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eScience 2024年第1期4卷 17-56页

作者： Wujie Dong Fuqiang Huang State Key Laboratory of High Performance Ceramics and Superfine Microstructure Shanghai Institute of CeramicsChinese Academy of SciencesShanghai 200050China State Key Laboratory of Rare Earth materials Chemistry and Applications College of Chemistry and Molecular EngineeringPeking UniversityBeijing 100871China

Crystal structure determines electrochemical energy storage characteristics;this is the underlying logic of material *** date,hundreds of electrode materials have been developed to pursue superior ***,it remains a great challenge to understand the fundamental structure–performance relationship and achieve quantitative crystal structure design for efficient energy *** this review,we introduce the concept of crystal packing factor(PF),which can quantify crystal packing *** then present and classify the typical crystal structures of attractive cathode/anode *** PF analyses of different materials,including polymorphs,isomorphs,and others,are performed to clarify the influence of crystal packing density on energy storage performance through electronic and ionic ***,the practical electronic/ionic conductivities of energy storage materials are based on their intrinsic characteristics related to the PF yet are also affected by extrinsic *** PF provides a novel avenue for understanding the electrochemical performance of pristine materials and may offer guidance on designing better *** approaches involve size regulation,doping,carbon additives,and other *** also propose extended PF concepts to understand charge storage and transport behavior at different ***,we provide our insights on the major challenges and prospective solutions in this highly exciting field.

关键词： Packing density Packing factor energy storage materials Rate capability Crystal structure Structure-activity relationship Electronic conductivity Ionic conductivity

Visible light-responsive azo-based smart materials: Design, performance, and applications in energy storage

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Smart Molecules

Smart Molecules 2024年第4期2卷 146-166页

作者： Shurui Lv Yuang Zhang Wentao Wang Shufen Zhang Bingtao Tang State Key Laboratory of Fine Chemicals Frontier Science Center for Smart MaterialsDalian University of TechnologyDalianChina School of materials Science and Engineering Zhejiang Sci-Tech UniversityHangzhouChina

Azobenzene and its derivatives are the most extensively investigated and applied molecular photoswitches,which can undergo reversible transformation between trans and cis isomers upon irradiation with light at specific *** structural geometry transformation,the property alterations can be integrated into smart materials to meet diverse application *** azo-based photo-switches require UV light for ***,complete activation within the visible or even near-infrared light range could offer several benefits for photo-switch applications,including improved biocompatibility,better light penetration,and enhanced solar light utilization *** review presents an overview of the development of visible-light responsive azo-based materials,covering molec-ular design strategies and their applications in energy *** efforts aimed at enhancing the performance of azo-based energy storage materials are *** to the different strategies for improving energy storage prop-erties,these materials are categorized as those that directly increase isomerization energy and those that introduce phase transition ***,we discuss the challenges and opportunities in this field with a view to inspire further exploration.

关键词： energy storage materials photochemistry

The mystic role of high-entropy designs in rechargeable metal-ion batteries:A review

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Journal of energy Chemistry 2024年第11期98卷 441-471页

作者： Yicheng Lin Shaohua Luo Wei Zhao Qi Sun Jun Cong Pengwei Li Pengyu Li Shengxue Yan School of materials Science and Engineering Northeastern UniversityShenyang 110819LiaoningChina School of Resources and materials Northeastern University at QinhuangdaoQinhuangdao 066004HebeiChina Key Laboratory of Dielectric and Electrolyte Functional Material Hebei Province Qinhuangdao 066004HebeiChina Department of Chemistry and Bioscience Aalborg University9220 AalborgDenmark

Rechargeable metal-ion batteries, such as lithium-ion batteries(LIBs) and sodium-ion batteries(SIBs),have raised more attention because of the large demand for energy storage solutions. Undoubtedly, electrode materials and electrolytes are key parts of batteries, exhibiting critical influence on the reversible capacity and span life of the metal-ion battery. Nonetheless, researchers commonly express concerns regarding the stability of both electrodes and electrolytes. Given its commendable stability attributes,high-entropy materials have garnered widespread acclaim and have been applied in many fields since their inception, notably in energy storage. However, while certain high-entropy designs have achieved substantial breakthroughs, some have failed to meet anticipated outcomes within the high energy density energy storage materials. Moreover, there is a lack of comprehensive summary research on the corresponding mechanisms and design principles of high-entropy designs. This review examines the current high-entropy designs for cathodes, anodes, and electrolytes, aiming to summarize the design principle,potential mechanisms, and electrochemical performance. We focus on their structural characteristics,interface characteristics, and prospective development trends. At last, we provide a fair evaluation along-side succinct development suggestions.

关键词： High-entropy materials energy storage materials Electrodes Electrolytes Interface

Structure stability, electronic property and voltage profile of LiFe_(1-n)NnP_(1-m)M_(m)O_(4) olivine cathode material

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Rare Metals 2021年第12期40卷 3512-3519页

作者： Zhi-Hong Cui Xue-Feng Lu Jian-Hua Luo Xin Guo Hong-Tao Xue Fu-Ling Tang State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metal Department of Materials Science and EngineeringLanzhou University of TechnologyLanzhou 730050China

First-principles computational studies under density functional theory(DFT) framework were used to investigate the structural stability, conductivity and voltage profile of LiFe_(1-n)NnP_(1-m)M_(m)O_(4)(N, M = Si or S) electrode materials. It is found that the Li FeP_(7/8)Si_(1/8)O_(4) system has the most stable structure. After doping, the band gap values of the systems decrease gradually, and LiFe_(7/8)S_(1/8)PO_(4) system has a minimum band gap of 1.553 e V, attributed to the hybridization of the Fe-d and S-p orbital electrons. The Li Fe P7/8 S1/8 O4 system demonstrates the characteristic of n-type semiconductor, and other doping systems have the feature of p-type semiconductor. Charge density difference maps show that the covalent property of Si-O bond is enhanced in the Li FeP_(7/8)Si_(1/8)O_(4) system. The average distance of Li and O atoms in the S doping systems increases from 0.21026 to 0.21486 and 0.21129 nm, respectively,indicating that doping broadens significantly the channel of Li ion de-intercalation in LiFe_(7/8)S_(1/8)PO_(4) and LiFeP_(7/8)S_(1/8)O_(4). Additionally, the results of lithium intercalation potential imply that the voltages of the doping systems fallinto the range of 2.23-2.86 V.

关键词： energy storage materials First principles Battery cathode LiFePO_(4) Doping Electronic properties

Phase formation and crystallization of LiMn_(x)Fe_(1-x)PO_(4)-C olivine material with different Mn^(2+)contents fabricated at lower calcination temperatures

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Rare Metals 2022年第9期41卷 3142-3149页

作者： Guan-Wei Liu Xiang-Jun Zhang Song Gong Dan-Ping Jiang Bing-Xue Liu Rong Yang Shi-Gang Lu R&D center for energy storage and vehicle batteries General Research Institute for Nonferrous MetalsBeijing100088China

LiMn_(x)Fe_(1-x)PO_(4)-C cathode materials for lithium ion batteries were synthesized via solid-state method using Li_(2)CO_(3),MnCO_(3),NH_(4)H_(2)PO_(4),FePO_(4) and sucrose as starting raw materials,followed by high-temperature reduction-annealing.A series of calcination experiments at different temperatures reveal that Mn^(2+)-containing materials exhibit a lower temperature for olivine phase formation,for example LiMn_(0.5)Fe_(0.5)PO_(4) olivine phase forms at 275℃,while manganese-free crystalline LiFePO_(4) generally forms at the required temperature of 350℃.Increasing Mn^(2+) content is found to enhance crystallization degree of LiMn_(x)Fe_(1-x)PO_(4) material prepared at lower calcination temperatures.X-ray photoelectron spectroscopy(XPS)results confirm that Mn valence state(+2)remains unchanged up to~250℃ when calcined in ambient *** above-mentioned beneficial effect of manganese on phase formation and crystallization of olivine can be well attributed to the stable nature of Mn^(2+)and its strong propensity to form olivine phases.

关键词： energy storage materials Solid-state reactions Phase transitions

Machine learning techniques for prediction of capacitance and remaining useful life of supercapacitors: A comprehensive review

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Journal of energy Chemistry 2023年第2期77卷 438-451,I0011页

作者： Vaishali Sawant Rashmi Deshmukh Chetan Awati Department of Technology Shivaji UniversityKolhapurMaharashtraIndia

Supercapacitors are appealing energy storage devices for their promising features like high power density,outstanding cycling stability,and a quick charge–discharge *** exceptional life cycle and ultimate power capability of supercapacitors are needed in the transportation and renewable energy generation ***,predicting the capacitance and lifecycle of supercapacitors is significant for selecting the suitable material and planning replacement intervals for *** addition,system failures can be better addressed by accurately forecasting the lifecycle of ***,the use of machine learning for performance prediction of energy storage materials has drawn increasing attention from researchers globally because of its superiority in prediction accuracy,time efficiency,and *** article presents a detailed review of the progress and advancement of ML techniques for the prediction of capacitance and remaining useful life(RUL)of *** review starts with an introduction to supercapacitor materials and ML applications in energy storage devices,followed by workflow for ML model building for supercapacitor ***,the summary of machine learning applications for the prediction of capacitance and RUL of different supercapacitor materials including EDLCs(carbon based materials),pesudocapacitive(oxides and composites)and hybrid materials is ***,the general perspective for future directions is also presented.

关键词： Supercapacitors energy storage materials Artificial neural network Machine learning Capacitance prediction Remaining useful life

Surface and structure engineering of MXenes for rechargeable batteries beyond lithium

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Journal of Materiomics 2024年第1期10卷 253-268页

作者： Zefu Huang Majid Farahmandjou Frederick Marlton Xin Guo Hong Gao Bing Sun Guoxiu Wang Centre for Clean energy Technology School of Mathematical and Physical SciencesFaculty of ScienceUniversity of Technology SydneyUltimoNSW2007Australia Joint International Laboratory on Environmental and energy Frontier materials School of Environmental and Chemical Engineering Shanghai UniversityShanghai200444China

With the rapid growth in renewable energy,researchers worldwide are trying to expand energy storage *** development of beyond-lithium battery technologies has accelerated in recent years,amid concerns regarding the sustainability of battery ***,the absence of suitable high-performance materials has hampered the development of the next-generation battery ***,a family of 2D transition metal carbides and/or nitrides,have drawn significant attention recently for electrochemical energy storage,owing to their unique physical and chemical *** extraordinary electronic conductivity,compositional diversity,expandable crystal structure,superior hydrophilicity,and rich surface chemistries make MXenes promising materials for electrode and other components in rechargeable *** report especially focuses on the recent MXene applications as novel electrode materials and functional separator modifiers in rechargeable batteries beyond *** particular,we highlight the recent advances of surface and structure engineering strategies for improving the electrochemical performance of the MXene-based materials,including surface termination modifications,heteroatom doping strategies,surface coating,interlayer space changes,nanostructure engineering,and heterostructures and secondary materials ***,perspectives for building future sustainable rechargeable batteries with MXenes and MXene-based composite materials are presented based upon material design and a fundamental understanding of the reaction mechanisms.

关键词： MXenes energy storage materials 2D materials Surface engineering Structure engineering

Strategies for flame-retardant polymer electrolytes for safe lithiumbased batteries

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Nano Research 2024年第10期17卷 8754-8771页

作者： Xiao Ma Yang Lu Yu Ou Shuaishuai Yan Wenhui Hou Pan Zhou Kai Liu Department of Chemical Engineering Tsinghua UniversityBeijing 100084China

The advancement of lithium-based batteries has spurred anticipation for enhanced energy density,extended cycle life and reduced capacity ***,these benefits are accompanied by potential risks,such as thermal runaway and explosions due to higher energy ***,liquid organic electrolytes are the predominant choice for lithium batteries,despite their limitations in terms of mechanical strength and vulnerability to *** development of polymer electrolytes,with their high Young’s modulus and enhanced safety features,offers a potential solution to the drawbacks of traditional liquid *** these advantages,polymer electrolytes are still susceptible to burning and *** address this issue,researchers have conducted extensive studies to improve their flame-retardant properties from various *** review provides a concise overview of the thermal runaway mechanisms,flame-retardant mechanisms and electrochemical performance of polymer *** also outlines the advancements in flame-retardant polymer electrolytes through the incorporation of various additives and the selection of inherently flame-retardant *** review aims to offer a comprehensive understanding of flame-retardant polymer electrolytes and serve as a guide for future research in this field.

关键词： lithium batteries polymer electrolyte thermal runaway flame-retardant additives energy storage materials