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Interwoven scaffolded porous titanium oxide nanocubes/carbon nanotubes framework for high-performance sodium-ion battery

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Journal of Energy Chemistry 2021年第8期30卷 38-46,I0002页

作者： Wen-Bei Yu Wen-Da Dong Chao-Fan Li nasiruddin Macadam Jiu-Xiang Yang Guo-Bin Zhang Zhi-Yi Hu Tien-Chun Wu Yu Li Tawfique Hasan Li-Hua Chen Li-Qiang Mai Bao-Lian Su State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China Cambridge Graphene Centre University of Cambridge9 JJ Thomson AvenueCB30FA CambridgeUnited Kingdom nanostructure Research Centre(NRC) Wuhan University of TechnologyWuhan 430070China Laboratory of Inorganic Materials Chemistry(CMI) University of Namur61 rue de Bruxelles5000 NamurBelgium

Supercapacitor-like na-ion batteries have attracted much attention due to the high energy density of batteries and power density of *** dioxide(TiO_(2)),is a promising anode *** performance is however seriously hindered by its low electrical conductivity and the sluggish diffusion of sodium ions(na^(+))in the TiO_(2)***,this work combines porous TiO_(2)nanocubes with carbon nanotubes(CNTs)to enhance the electrical conductivity and accelerate na^(+)diffusivity for na-ion batteries(NIBs).In this composite,an interwoven scaffolded TiO_(2)/CNTs framework is formed to provide abundant channels and shorter diffusion pathways for electrons and *** in-situ X-ray diffraction and cyclic voltammetry confirm the low strain and superior transport kinetics in na^(+)intercalation/extraction *** addition,the chemically bonded TiO_(2)/CNTs hybrid provides a more feasible channel for na^(+)insertion/extraction with a much lower energy ***,the TiO_(2)/CNTs composite exhibits excellent electrochemical performance with a capacity of 223.4 m Ah g^(-1)at 1 C and a capacity of 142.8 m Ah g^(-1)at 10 C(3.35 A g^(-1)).The work here reveals that the combination of active materials with CNTs can largely improve the utilization efficiency and enhance their sodium storage.

关键词： Supercapacitor-like Interwoven scaffold na-ion battery TiO_(2) Carbon nanotubes

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Toward superior lithium/sodium storage performance: design and construction of novel TiO_(2)-based anode materials

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Rare Metals 2021年第11期40卷 3049-3075页

作者： Pan-Pan Peng Yu-Rong Wu Xue-Zhong Li Jun-Hong Zhang Yan-Wei Li Ping Cui Ting-Feng Yi School of Materials Science and Engineering Northeastern UniversityShenyang 110819China School of Chemistry and Chemical Engineering Anhui University of TechnologyMaanshan 243002China Shandong Provincial Key Laboratory of Chemical Energy Storage and Novel Cell Technology College of Chemistry and Chemical EngineeringLiaocheng UniversityLiaocheng 252059China Department of Materials Science and Engineering University of WashingtonSeattleWA 98195USA Guangxi Key Laboratory of Electrochemical and Magneto-Chemical Function Materials College of Chemistry and BioengineeringGuilin University of TechnologyGuilin 541004China

TiO_(2)-based materials have been considered as one of most promising alternatives for high-performance Li(na)-ion batteries because of the low cost,simple composition,easy synthesis,good environmental protection,excellent safety and relatively high specific ***,the inferior electronic conductivity and poor ion diffusion coefficients are the biggest bottlenecks that restrict the popular *** effort has been focused on resolving these problems toward large-scale applications,and numerous significant advances have been *** the present work,a comprehensive overview of structure characteristics,electrochemical reaction mechanism and modification strategies of TiO_(2)-based materials was *** recent advances of various efficient ways for improving conductivity,Li(na)storage capacity,rate capability and cycle stability are systematically summarized,including surface engineering,constructing composite and element doping,*** TiO_(2)-based materials with novel porous heterogeneous core-shell structures have been regarded as one of the most effective ways to resolve these ***,the future research directions and development prospects of TiO_(2)-based anode materials used in the manufacture of high-performance Li(na)-ion batteries are *** review can provide important comprehension for the construction and optimization of highperformance of TiO_(2)-based anode materials.

关键词： TiO_(2) Anode material Li-ion battery na-ion battery Electrochemical performance

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Anionic redox reaction mechanism in na-ion batteries

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Chinese Physics B 2022年第9期31卷 95-102页

作者：侯雪妍容晓晖陆雅翔胡勇胜 Key Laboratory for Renewable Energy Beijing Key Laboratory for New Energy Materials and DevicesBeijing National Laboratory for Condensed Matter PhysicsInstitute of PhysicsChinese Academy of SciencesBeijing 100190China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100190China

na-ion batteries(NIBs),as one of the next-generation rechargeable battery systems,hold great potential in large-scale energy storage applications owing to the abundance and costeffectiveness of sodium *** the extensive exploration of electrode materials,the relatively low attainable capacity of NIBs hinders their practical *** recent years,the anionic redox reaction(ARR)in NIBs has been emerging as a new paradigm to deliver extra capacity and thus offers an opportunity to break through the intrinsic energy density *** this review,the fundamental investigation of the ARR mechanism and the latest exploration of cathode materials are summarized,in order to highlight the significance of reversible anionic redox and suggest prospective developing directions.

关键词： energy storage na-ion battery anionic redox reaction

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Hollow carbon microbox from acetylacetone as anode material for sodium-ion batteries

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Journal of Energy Chemistry 2020年第12期29卷 293-302页

作者： Tianyun Qiu Wanwan Hong Lin Li Yu Zhang Peng Cai Cheng Liu Jiayang Li Guoqiang Zou Hongshuai Hou Xiaobo Ji Hunan Province Key Laboratory of Chemical Power Source.State Key Laboratory of Powder Metallurgy College of Chemistry and Chemical EngineeringCentral South UniversityChangsha 410083HunanChina

Carbon-based materials have attracted much interest as one of the promising anodes for sodium-ion batteries. However, low utilization of electrolyte and slow ion-transfer rate during electrochemical process hinder the further application of traditional bulk carbon. In order to enhance the diffusion kinetics and maintain the reversibility, hierarchical hollow carbon microbox was successfully prepared through a tunable bottom-up self-template routine for sodium-ion batteries. During annealing process, the morphology construction and activation happened synchronously. Based on that, a range of cross-linked porous nanosheet and hollow microbox were attained by manipulating reactant condition. The generation of texture and physical property are analyzed and are established linkages related to the electrochemical behavior. As results depicted in kinetic exploration and simulation based on cyclic voltammetry, the surfacecontrolled electrochemical behavior gradually turns to be the diffusion-controlled behavior as the hollow microbox evolves to porous nanosheet. The probable reason is that the rational microstructure/texture design leads to the accelerated diffusion kinetic procedure and the reduced concentration difference polarization. Sodium storage mechanism was deduced as reversible binding of na-ions with local defects,including vacancies on sp2 graphitic layers, at the edges of flakes and other structural defects instead of intercalation. Bestowed by the morphology design, the broad pore width distribution, abundant defects/active sites and surface functionality, hollow microbox electrode delivers great electrochemical performances. This work is expected to propose a novel and effective strategy to prepare tunable hierarchical hollow carbon microbox and induce the fast kinetic of carbon anode material.

关键词： na-ion battery Carbon anode Hollow carbon Sodium storage Electrochemistry

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Facile synthesis of hollow Cu_(3)P for sodium-ion batteries anode

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Rare Metals 2021年第12期40卷 3460-3465页

作者： Jiao-Long Zhang Chao-Lin Li Wen-Hui Wang Denis Y.W.Yu School of Materials Science and Engineering Dongguan University of TechnologyDongguan 523808China Shenzhen Key Laboratory on Power battery Safety Research and Shenzhen Geim Graphene Center Tsinghua Shenzhen International Graduate SchoolShenzhen 518055China School of Civil and Environmental Engineering Harbin Institute of TechnologyShenzhen 518055China School of Energy and Environment City University of Hong KongHong Kong 999077China

Combining metal to form metal phosphide is a promising strategy to address the fast capacity decay of P rooted from its low electronic conductivity and large volume changes upon cycling. Cu_(3)P, which possesses a high theoretical gravimetric and volumetric capacity of 363 m Ahág^(-1) and 1028 AháL^(-1) and reasonable volume expansion of 156% during sodiation, was investigated as anode material in SIBs. Hollow-structured Cu_(3)P electrode delivers an initial de-sodiation capacity of * 159.0 m Ahág^(-1) with high capacity retention of ~85.1% over 50 cycles at 0.2 C rate and exhibits good rate performance,retaining 70% of the capacity when the current density increases from 0.2 C to 1.6 C. A 3 V-class full cell consisting of P2-na_(2/3) Ni_(1/3) Mn_(1/2) Ti_(1/6)O_(2) cathode and Cu_(3)P anode was also assembled, which could achieve an energy density of ~189.3 Whákg^(-1)(based on the mass of both electrode materials) and average discharge voltage of~2.91 V when cycled in 1.0-4.3 V at 0.1C.

关键词： na-ion battery Anode Phosphorus Cu_(3)P Hollow

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Growth of SnO_2 nanoflowers on N-doped Carbon nanofibers as Anode for Li-and na-ion Batteries

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nano-Micro Letters 2018年第2期10卷 21-29页

作者： Jiaojiao Liang Chaochun Yuan Huanhuan Li Kai Fan Zengxi Wei Hanqi Sun Jianmin Ma School of Physics and Electronics Hunan University Automotive Engineering Research Institute Jiangsu University Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education) Nankai University

It is urgent to solve the problems of the dramatic volume expansion and pulverization of SnO_2 anodes during cycling process in battery systems. To address this issue, we design a hybrid structure of N-doped carbon fibers@SnO_2 nanoflowers(NC@SnO_2) to overcome it in this work. The hybrid NC@SnO_2 is synthesized through the hydrothermal growth of SnO_2 nanoflowers on the surface of N-doped carbon fibers obtained by electrospinning. The NC is introduced not only to provide a support framework in guiding the growth of the SnO_2 nanoflowers and prevent the flower-like structures from agglomeration, but also serve as a conductive network to accelerate electronic transmission along one-dimensional structure effectively. When the hybrid NC@SnO_2 was served as anode, it exhibits a high discharge capacity of 750 Ah g^(-1) at 1 A g^(-1) after 100 cycles in Li-ion battery and 270 mAh g^(-1) at 100 mA g^(-1) for 100 cycles in na-ion battery, respectively.

关键词： SnO2 nanostructures Anode Li-ion battery na-ion battery

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Hierarchically porous carbon cages synthesized through in situ migration of templates

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Chinese Chemical Letters 2020年第1期31卷 303-306页

作者： Qing Fang Wei Zhang Xinghua Chen Yuanjian Zhang Ming Hu State Key Laboratory of Precision Spectroscopy School of Physics and Materials ScienceEast China Normal UniversityShanghai 200241China Jiangsu Engineering Laboratory of Smart Carbon-Rich Materials and Device School of Chemistry and Chemical EngineeringSoutheast UniversityNanjing 211189China

In order to optimize mass transportation and exchange,nature creates hierarchically porous networks which are composed of multi-level *** bottom-up templating methods have succeeded in fabrication of these kinds of hierarchically porous networks,the templates have to be assembled/packed in advance,therefore,driving the fabrication process too *** this report,we presented that the hierarchically porous networks could be fabricated through migration of templates,which was similar to formation of rive *** thermal pyrolysis of Prussian blue cages,the in situly generated iron oxides nanoparticles diffused and aggrega ted together to grow larger,and eventually moved outside from the porous *** moving routes of the iron oxides became hierarchical channels in the obtained carbon *** using the porous carbon cages as electrode for na-ion battery,a pseudocapacitor-type ion storage was investigated.

关键词： Hierarchical structures Hierarchically porous carbon Mobile templates Thermal pyrolysis na-ion battery

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