检索结果-南通市图书馆

MXene Enhanced 3D Needled Waste Denim Felt for High‑Performance Flexible Supercapacitors

在线全文

学校读者我要写书评

暂无评论

Nano-Micro Letters 2024年第2期16卷 383-394页

作者： Wei Fan Qi Wang Kai Rong Yang Shi Wanxi Peng Handong Li Zhanhu Guo Ben Bin Xu Hua Hou Hassan Algadi Shengbo Ge Key Laboratory of Functional Textile Material and Product of the Ministry of Education School of Textile Science and EngineeringInstitute of Flexible electronics and Intelligent TextileXi’an Polytechnic UniversityXi’an 710048People’s Republic of China Co‑Innovation Center of Efficient Processing and Utilization of Forest Resources College of Materials Science and EngineeringNanjing Forestry UniversityNanjing 210037People’s Republic of China Henan Province International Collaboration Lab of Forest Resources Utilization School of ForestryHenan Agricultural UniversityZhengzhou 450002People’s Republic of China Integrated Composites Lab Department of Mechanical and Construction EngineeringNorthumbria UniversityNewcastle Upon Tyne NE18STUK College of Materials Science and Engineering Taiyuan University of Science and TechnologyTaiyuan 030024People’s Republic of China Department of Electrical Engineering Faculty of EngineeringNajran University11001 NajranSaudi Arabia

MXene,a transition metal carbide/nitride,has been prominent as an ideal electrochemical active material for Supercapacitors.However,the low MXene load limits its practical applications.As environmental concerns and sustainable development become more widely recognized,it is necessary to explore a greener and cleaner technology to recycle textile by-products such as cotton.The present study proposes an effective 3D fabrication method that uses MXene to fabricate waste denim felt into ultralight and flexible Supercapacitors through needling and carbonization.The 3D structure provided more sites for loading MXene onto Z-directional fiber bundles,resulting in more efficient ion exchange between the electrolyte and electrodes.Furthermore,the carbonization process removed the specific adverse groups in MXenes,further improving the specific capacitance,energy density,power density and electrical conductivity of Supercapacitors.The electrodes achieve a maximum specific capacitance of 1748.5 mF cm-2 and demonstrate remarkable cycling stability maintaining more than 94%after 15,000 galvanostatic charge/discharge cycles.Besides,the obtained Supercapacitors present a maximum specific capacitance of 577.5 mF cm^(-2),energy density of 80.2μWh cm^(-2)and power density of 3 mW cm^(-2),respectively.The resulting Supercapacitors can be used to develop smart wearable power devices such as smartwatches,laying the foundation for a novel strategy of utilizing waste cotton in a high-quality manner.

关键词： MXene 3D needled waste denim felt Supercapacitors Carbonization

Metal-Organic Framework Materials for Electrochemical Supercapacitors

在线全文

学校读者我要写书评

暂无评论

Nano-Micro Letters 2022年第11期14卷 172-204页

作者： Ziwei Cao Roya Momen Shusheng Tao Dengyi Xiong Zirui Song Xuhuan Xiao Wentao Deng Hongshuai Hou Sedat Yasar Sedar Altin Faith Bulut Guoqiang Zou Xiaobo Ji College of Chemistry and Chemical Engineering Central South UniversityChangsha 410083People’s Republic of China Department of Chemistry Faculty of ScienceInonu University44280 BattalgaziMalatyaTurkey Physics Department Inonu University44280 MalatyaTurkey School of Materials Science and Engineering Zhengzhou UniversityZhengzhou 450001People’s Republic of China

Exploring new materials with high stability and capacity is full of challenges in sustainable energy conversion and storage systems.Metal-organic frameworks(MOFs),as a new type of porous material,show the advantages of large specific surface area,high porosity,low density,and adjustable pore size,exhibiting a broad application prospect in the field of electrocatalytic reactions,batteries,particularly in the field of Supercapacitors.This comprehensive review outlines the recent progress in synthetic methods and electrochemical performances of MOF materials,as well as their applications in Supercapacitors.Additionally,the superiorities of MOFs-related materials are highlighted,while major challenges or opportunities for future research on them for electrochemical Supercapacitors have been discussed and displayed,along with extensive experimental experiences.

关键词： Metal-organic frameworks(MOFs) Electrochemistry Supercapacitors Electrode materials

三维空心枝化结构碳材料的制备及其超电性能研究

在线全文

学校读者我要写书评

暂无评论

Science Bulletin 2022年第4期67卷 398-407,M0004页

作者：纪律律朱滢滢滕雪王騊王晟 Thomas J.Meyer 陈作锋 School of Materials Science and Engineering Zhejiang Sci-Tech UniversityHangzhou 310018China School of Chemical Science and Engineering Tongji UniversityShanghai 200092China Department of Chemistry University of North Carolina at Chapel HillChapelNC 27599USA

空心结构微纳米材料具有低密度、高表面积/体积比、高负载容量及有利于传质扩散等特点,在能量存储与转化、催化、载药、环境治理等领域具有广泛用途.传统硬模板法是制备和调控空心结构的最普适方法,通过合理提高空心结构的复杂性可赋予... 详细信息

空心结构微纳米材料具有低密度、高表面积/体积比、高负载容量及有利于传质扩散等特点,在能量存储与转化、催化、载药、环境治理等领域具有广泛用途.传统硬模板法是制备和调控空心结构的最普适方法,通过合理提高空心结构的复杂性可赋予材料独特的性能和优势,但也使得复杂空心结构的构建更具挑战性.本文基于金属有机框架ZIF-8和葡萄糖的水热特性进行一步水热反应,首次报道了一种独特的"集成硬模板法"用于制备复杂三维空心枝化结构碳材料.对反应过程中产物的结构演变及反应液变化进行表征分析,结果显示ZIF-8纳米颗粒首先水解形成枝化结构ZnO,随后葡萄糖在ZnO表面聚合并原位释放有机酸刻蚀内部ZnO模板,从而实现模板制备、材料包覆和模板去除的有序集成串联.水热碳质产物经高温热解后得到复杂三维空心枝化结构碳材料,其作为电极材料或基底电极(导电载体)时均表现出优异的超级电容器性能.

关键词： Branched hollow architecture Carbonaceous material One-pot synthesis Integrated hard-templating strategy Supercapacitors

Multi-layer hierarchical cellulose nanofibers/carbon nanotubes/vinasse activated carbon composite materials for Supercapacitors and electromagnetic interference shielding

在线全文

学校读者我要写书评

暂无评论

Nano Research 2024年第3期17卷 904-912页

作者： Tianxu Wang Chuanyin Xiong Yongkang Zhang Bo Wang Qing Xiong Mengjie Zhao Yonghao Ni College of Bioresources Chemical&Materials Engineering Shaanxi University of Science and TechnologyXi’an 710021China Department of Chemical and biomedical Engineering The University of MaineOronoME 04469USA University of New Brunswick Limerick Pulp&Paper CtrFrederictonNB E3B 5A3Canada

Developing porous self-supporting electrodes with excellent conductivity,good mechanical properties,and high electrochemical activity is crucial for constructing electrode materials with lightweight,ultra-thin,flexible,and high capacitance performance.In this work,we prepared a cellulose nanofibers(CNFs)/carbon nanotubes(CNTs)/vinasse activated carbon(VAC)(CCV)composite material with a multi-layer hierarchical conductive structure through simple vacuum filtration and freeze-drying.In this composite material,the self-assembly of CNF provides the main skeleton structure of a multi-layer hierarchical structure.CNT provides a fast path for the rapid transfer of electrons and is beneficial for the loss of electromagnetic waves.VAC provides sufficient double layer performance.The synergistic effect of the above three endows CCV composite materials with excellent energy storage performance and electromagnetic interference(EMI)shielding performance.In addition,we endowed the CCV composite with a certain shape and performance by introducing a vitrimer polymer with a dynamic cross-linked network structure.In summary,thanks to the synergistic effect of various components in the multi-layer hierarchical structure,CCV composite materials exhibit excellent integration performance,especially stable energy storage performance and EMI shielding performance.These significant properties make CCV composite materials have great application prospects in the fields of energy storage and intelligent EMI shielding.

关键词： self-supporting electrodes multi-layer hierarchical structure Supercapacitors electromagnetic interference shielding

Dielectric polymer grafted electrodes enhanced aqueous Supercapacitors

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Nano Research 2024年第3期17卷 1525-1534页

作者： Shian Dong Kunming Shi Jie Chen Yingke Zhu Hongfei Li Weihang Gao Zhenli Xu Qinglei Liu Xingyi Huang Shanghai Key Laboratory of Electrical Insulation and Thermal Aging Department of Polymer Science and EngineeringState Key Laboratory of Metal Matrix CompositesShanghai Jiao Tong UniversityShanghai 200240China School of Mathematical Sciences Institute of Natural Sciences and MOE−LSCShanghai Jiao Tong UniversityShanghai 200240China State Key Laboratory of Metal Matrix Composites Shanghai Jiao Tong UniversityShanghai 200240China

Supercapacitors(SCs)have become increasingly important in electrical energy storage and delivery owing to their high power densities and long lifetimes.Aqueous SCs are promising for large-scale engineering applications because of their low cost and safety.However,the low operating voltage and low energy density of aqueous SCs severely limit their practical applications.In this study,a nanoscale dielectric layer is grafted onto a graphene electrode to achieve both a high operating voltage and enhanced capacitance.Compared with an SC without dielectric grafting,a dielectric-enhanced SC(DESC)shows a higher capacitance by 2200%.The mechanism of the capacitance enhancement can be attributed to three factors:the dielectric polarization,the ions desolvation by the dielectric,and the enhanced quantum capacitance from charge transfer and ion adsorption in the polymer molecules.In addition,a 2.5 V pouch DESC with a 1 M KCl electrolyte is confirmed to cycle up to 50,000 times with a capacitance retention of 87.5%.The DESC presents the optimal electrochemical properties after it is grafted with a 5 nm dielectric layer.This study provides new insights into the design of high-voltage and high-energy-density aqueous SCs.

关键词： Supercapacitors dielectric polymer high voltage capacitance enhancement

Bioabsorbable fabrication of molybdenum nitride/carbon nanocomposites for Supercapacitors and metal ion batteries with robust stability

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Rare Metals 2023年第12期42卷 4212-4225页

作者： Qiang-Hong Wu Huan-Zhong Zeng You-Zhi Wu Fen Ran State Key Laboratory of Advanced Processing and Recycling of Non-Ferrous Metals School of Materials Science and EngineeringLanzhou University of TechnologyLanzhou 730050China

Metal nitride is one of the best anode materials of the energy storage device;however,the low stability of the pure metal nitride limits its wide applications.In this work,a new method of bioabsorbable fabrication was developed for preparing molybdenum nitride that corporates into the porous carbon materials.The molybdenum ions in pollutions could be easily absorbed by Ligustrum quihoui,and the transportation,accumulation,and circulation of molybdenum ions in Ligustrum quihoui were studied.The obtained composite material of biochar and molybdenum nitride is employed as anode material of Supercapacitors and batteries which exhibits good electrochemical performance,especially the rate and long lifespan aspects.Typically,it is found that the specific capacity is344 F·g^(-1)at current density of 0.5 A·g^(-1)in 2 mol·L^(-1)KOH,and the capacitance retention and coulomb efficiency are above 90%after 10,000 cycles.It should be noted that the novel approach combines fabricating anode materials with advanced nanostructure and suppressing the environmental problems with metal pollution at the same time.

关键词： Metal pollution Ligustrum quihoui Supercapacitors Metal ions batteries Anode materials

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

在线全文

学校读者我要写书评

暂无评论

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 cycle.The exceptional life cycle and ultimate power capability of Supercapacitors are needed in the transportation and renewable energy generation sectors.Hence,predicting the capacitance and lifecycle of Supercapacitors is significant for selecting the suitable material and planning replacement intervals for Supercapacitors.In addition,system failures can be better addressed by accurately forecasting the lifecycle of SCs.Recently,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 costeffectiveness.This article presents a detailed review of the progress and advancement of ML techniques for the prediction of capacitance and remaining useful life(RUL)of Supercapacitors.The review starts with an introduction to supercapacitor materials and ML applications in energy storage devices,followed by workflow for ML model building for supercapacitor materials.Then,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 presented.Finally,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

Pore-structure regulation and heteroatom doping of activated carbon for Supercapacitors with excellent rate performance and power density

在线全文

学校读者我要写书评

暂无评论

Waste Disposal and Sustainable Energy 2023年第3期5卷 417-426页

作者： Jian Zhang Huachao Yang Zhesong Huang HuiHui Zhang Xinchao Lu Jianhua Yan Kefa Cen Zheng Bo State Key Laboratory of Clean Energy Utilization Institute for Thermal Power EngineeringCollege of Energy EngineeringZhejiang UniversityHangzhou310027ZhejiangChina

Activated carbon(AC)has attracted tremendous research interest as an electrode material for Supercapacitors owing to its high specific surface area,high porosity,and low cost.However,AC-based Supercapacitors suffer from limited rate performance and low power density,which mainly arise from their inherently low electrical conductivity and sluggish ion dynamics in the micropores.Here,we propose a simple yet effective strategy to address the aforementioned issue by nitrogen/fluorine doping and enlarging the micropore size.During the treatment,the decomposition products of NH4F react with the carbon atoms to dope the AC with nitrogen/fluorine and simultaneously enlarge the pores by etching.The treated AC shows a higher specific surface area of 1826 m2 g^(−1)(by~15%),more micropores with a diameter around 0.93 nm(by~33%),better wettability(contact angle decreased from 120°to 45°),and excellent electrical conductivity(96 S m^(−1))compared with untreated AC(39 S m^(−1)).The as-fabricated Supercapacitors demonstrate excellent specific capacitance(26 F g^(−1)at 1 A g^(−1)),significantly reduced electrical resistance(by~50%),and improved rate performance(from 46.21 to 64.39%at current densities of 1 to 20 A g^(−1)).Moreover,the treated AC-based supercapacitor achieves a maximum energy density of 25 Wh kg^(−1)at 1000 W kg^(−1)and a maximum power density of 10,875 W kg^(−1)at 15 Wh kg^(−1),which clearly outperforms pristine AC-based Supercapacitors.This synergistic treatment strategy provides an effective way to improve the rate performance and power density of AC-based Supercapacitors.

关键词： Activated carbon Heteroatom doping Pore-size modification Rate performance Supercapacitors

Construction of NiCo_(2)O_(4) nanoflake arrays on cellulose-derived carbon nanofibers as a freestanding electrode for high-performance Supercapacitors

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Frontiers of Chemical Science and Engineering 2023年第6期17卷 691-703页

作者： Xuepeng Ni Kunming Li Changlei Li Qianqian Wu Chenglin Liu Huifang Chen Qilin Wu Anqi Ju College of Materials Science and Engineering&State Key Laboratory for Modification of Chemical Fibers and Polymer Materials Donghua UniversityShanghai 201620China Key Laboratory of High-Performance Fibers&Products Ministry of EducationDonghua UniversityShanghai 201620China Weifang Xinlong Biomaterial Co. Ltd.Weifang 261000China

Cellulose has a wide range of applications in many fields due to their naturally degradable and low-cost characteristics,but few studies can achieve cellulose-nanofibers by conventional electrospinning.Herein,we demonstrate that the freestanding cellulose-based carbon nanofibers are successfully obtained by a special design of electrospinning firstly,pre-oxidation and high-temperature carbonization(1600℃),which display a superior electrical conductivity of 31.2 S·cm^(-1)and larger specific surface area of 35.61 m^(2)·g^(-1)than that of the polyacrylonitrile-based carbon nanofibers(electrical conductivity of 18.5 S·cm^(-1),specific surface area of 12 m^(2)·g^(-1).The NiCo_(2)O_(4)nanoflake arrays are grown uniformly on the cellulose-based carbon nanofibers successfully by a facile one-step solvothermal and calcination method.The as-prepared cellulose-based carbon nanofibers/NiCo_(2)O_(4)nanoflake arrays are directly used as electrodes to achieve a high specific capacitance of 1010 F·g^(-1)at 1 A·g^(-1)and a good cycling stability with 90.84%capacitance retention after 3000 times at 10 A·g^(-1).Furthermore,the all-solid-state symmetric Supercapacitors assembled from the cellulose-based carbon nanofibers/NiCo_(2)O_(4)deliver a high energy density of 62 W·h·kg(-1) at a power density of 1200 W·kg^(-1).Six all-solid-state symmetric Supercapacitors in series can also power a‘DHU’logo consisted of 36 light emitting diodes,confirming that the cellulose-based carbon nanofiber is a promising carbon matrix material for energy storage devices.

关键词： cellulose carbon nanofibers NiCo_(2)O_(4) Supercapacitors