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Transactions of Nonferrous Metals Society of China 2020年第8期30卷 2188-2199页

作者： Jing ZHAN Chang-fan XU Yi-yu LONG Qi-hou LI School of Metallurgy and Environment Central South UniversityChangsha 410083China National Engineering Laboratory for High Efficiency Recovery of Refractory Nonferrous Metals Resources Central South UniversityChangsha 410083China

To inhibit rapid capacity attenuation of Bi2Mn4O10 anode material in high-energy lithium-ion batteries,a novel high-purity anode composite material Bi2Mn4O10/ECP-N(ECP-N:N-doped Ketjen black)was prepared via an uncomplicated ball milling *** as-synthesized Bi2Mn4O10/ECP-N composite demonstrated a great reversible specific capacity of 576.2 m A·h/g after 100 cycles at 0.2 C with a large capacity retention of 75%.However,the capacity retention of individual Bi2Mn4O10 was only 27%.Even at 3 C,a superior rate capacity of 236.1 m A·h/g was *** remarkable electrochemical performances could give the credit to the introduction of ECP-N,which not only effectively improves the specific surface area to buffer volume expansion and enhances conductivity and wettability of composites but also accelerates the ion transfer and the reversible conversion reaction.

关键词： Bi2Mn4O10 nanoparticles N-doped Ketjen black rate capability lithium-ion batteries

Neurons-system-like structured SnS_(2)/CNTs composite for high-performance sodium-ion battery anode

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Rare Metals 2021年第6期40卷 1383-1390页

作者： Ling Zhu Xue-Xian Yang Yan-Hong Xiang Peng Kong Xian-Wen Wu School of Physics and Electromechanical Engineering Jishou UniversityJishou 416000China School of Chemistry and Chemical Engineering Jishou UniversityJishou 416000China

Sodium-ion batteries(SIBs)have attracted significant attention with respect to renewable energy power generation systems because of the abundant reserves of sodium on ***,anode materials are presently limited by low energy density,poor rate performance and inferior cycling *** recent years,tin disulfide(SnS_(2))with a particular layered structure has been considered as a promising anode material for SIBs due to its high theoretical capacity and low ***,a nervoussystem-like structured SnS_(2)/CNTs composite was successfully synthesized via a hydrothermal *** SnS_(2)sheets were strung with carbon nanotubes(CNTs)to form a hierarchical porous structure,which is effective for electrolyte diffusion and electronic *** large distance of the(001)plane(0.5899 nm)of SnS_(2)favors Na+insertion-extraction *** from these structural characteristics,SnS_(2)/CNTs electrodes exhibit high specific capacity,excellent rate performance and superior cycling stability.A high charge capacity of 642 mAh·g^(-1)was released at 0.2 A·g^(-1),and then,a high reversible capacity of 427 mAh·g^(-1)was retained after 100 *** charged at 2 A·g^(-1),the SnS_(2)/CNTS electrode maintained a capacity of 282 mAh·g^(-1).The nervous-system-like structure of the SnS_(2)/CNTs composite provides a novel strategy for the development of SIBs with high electrochemical performance.

关键词： SnS_(2)/CNTs Sodium-ion batteries Anode Composite rate capability

Architecture of Co-layered double hydroxide nanocages/graphene composite electrode with high electrochemical performance for supercapacitor

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Journal of Energy Chemistry 2018年第2期27卷 507-512页

作者： Xianyu Chu Ting Deng Wei Zhang Dong Wang Xiaofei Liu Cai Zhang Tingting Qin Liyun Zhang Bingsen Zhang Chengmeng Chen Weitao Zheng State Key Laboratory of Automotive Simulation and Control and Department of Materials Science and International Center of Future Science and Electron Microscopy Center Jilin University Changchun 130012 Jilin China Institute of Metal Research Chinese Academy of Sciences Shenyang 110016 Liaoning China CAS Key Laboratory of Carbon Materials Institute of Coal Chemistry Chinese Academy of Sciences Taiyuan 030001 Shanxi China

A facile hydrolysis method was applied to fabricate high-performance Co-layered double hydroxide（LDH）nanocages/graphene composites for supercapacitors. The materials exhibit enhanced rate capability than the counterpart electrode free of graphene while maintaining a high specific capacitance. In addition,such Co-LDH nanocages/graphene composites display an excellent cycling stability; the capacitance retention of Co-LDH nanocages/graphene composite electrode remains 90.4% after 10000 cycles at a current density of 2 A g（-1）. The integration of high capacity of double hydroxide and outstanding conductivity of graphene makes the delicately-designed composites promising candidates for electrode materials for supercapacitors.

关键词： Co-LDH nanocages Graphene Hydrolysis rate capability Supercapacitor

Copolymerization-Assisted Preparation of Porous LiMn_2O_4 Hollow Microspheres as High Power Cathode of Lithium-ion Batteries

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Journal of Materials Science & Technology 2017年第8期33卷 781-787页

作者： Zhimin Zou Zhaojin Li Hui Zhang Xiaohui Wang Chunhai Jiang Fujian Provincial Key Laboratory of Functional Materials and Applications Institute of Advanced Energy Materials School of Materials Science and Engineering Xiamen University of Technology Institute of Metal Research Chinese Academy of Sciences

Porous LiMn2O4 hollow microspheres were facilely prepared by incorporation of Li and Mn elements into a spherical polymeric precursor through copolymerization of lithium and manganese acetates with resorcinol and hexamethylenetetramine and then burning off the organic matrix at appropriate temperatures in air. The LiMn2O4 inherited the spherical morphology of the polymeric precursor but showed hollow porous structure assembled by nanocrystals of about 50–100 nm in size. When tested as cathode of Li-ion batteries, the LiMn2O4 hollow spheres exhibited excellent rate capability and cycle stability.A discharge capacity of above 90 mAh g-1was maintained at 10 C（1C = 120 mAg-1）, and the cells can still deliver a discharge capacity over 100 mAhg-1after another 115 cycles at 0.5 C. With such excellent electrochemical properties, the prepared LiMn2O4 hollow microspheres could be promising cathode of Li-ion batteries for long term and high power applications.

关键词： Li-ion batteries Cathode LiMn2O4 Hollow spheres rate capability

Advances of graphene application in electrode materials for lithium ion batteries

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Science China(Technological Sciences) 2015年第11期58卷 1829-1840页

作者： LU XiaoYu JIN XiHai SUN Jing State Key Lab of High Performance Ceramics and Superfine Microstructure Shanghai Institute of Ceramics Chinese Academy of Sciences

The demands for better energy storage devices due to fast development of electric vehicles(EVs) have raised increasing attention on lithium ion batteries(LIBs) with high power and energy densities. In this paper, we provide an overview of recent progress in graphene-based electrode materials. Graphene with its great electrical conductivity and mechanical properties have apparently improved the performance of traditional electrode materials. The methods and electrochemical properties of advanced graphene composite as cathode and anode for LIBs are reviewed. Two novel kinds of graphene hybrid materials are specially highlighted: three-dimensional porous and flexible binder-free graphene-based materials. Challenges for LIBs and future research trend in the development of high-performance electrode materials are further discussed.

关键词： lithium ion batteries (LIBs) graphene cyclability rate capability nanomaterials three dimensional structure flexibleand binder-free electrode

Ni3S2@S-carbon nanotubes synthesized using NiS2 as sulfur source and precursor for high-performance sodium-ion half/full cells

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Science China Materials 2020年第2期63卷 216-228页

作者： Hongcheng He Changmiao Chen Zhi Chen Pengchao Li Shuangshuang Ding Mengqiu Cai Ming Zhang Key Laboratory for Micro/Nano Optoelectronic Devices of Ministry of Education Hunan Provincial Key Laboratory of Low-Dimensional Structural Physics&DevicesSchool of Physics and ElectronicsHunan UniversityChangsha 410082China School of Materials Science and Engineering Nanchang Hangkong UniversityNanchang 330063China Synergetic Innovation Center for Quantum Effects and Applications(SICQEA) Hunan Normal UniversityChangsha 410081China

Nickle sulfides are attractive anode materials for sodium-ion batteries(SIBs) due to their rich structures and natural abundance. However, their applications are greatly hindered by the large volume expansion and poor cycling properties. The introduction of hollow structures and heteroatom-doped carbon layers are effective ways to solve these issues. Here, nitrogen, sulfur co-doped carbon coated Ni3S2(abbreviated as, Ni3S2@NSC) nanotubes were prepared by a novel templating route. During the annealing process, NiS2 acts as both a precursor to Ni3S2 and an S-doped sulfur *** additional sulfur source was used during the S-doping procedure, suggesting an atomically economic synthesis process. As anodes for sodium-ion half-cells, Ni3S2@NSCs exhibited high discharge capacity of 481 mA h g^-1 at 0.1 A g^-1 after 100 cycles with exceptional capacity retention of 98.6%.Furthermore, they maintained excellent rate capability of 318 mA h g^-1 even at elevated current density of 5 A g^-1. Sodium-ion full-cells assembled from the Ni3S2@NSC anodes and Na3V2(PO4)3(NVP@C) cathodes also presented superior capacities and cyclabilities. These features can be attributed to the N, S co-doped carbon coated hollow structure that provided sufficient contact between the electrode and electrolyte,enhanced surface ion storage performance(capacitive effect),and improved structural stability of electrode materials.

关键词： hollow structure N S co-doped carbon rate capability sodium-ion batteries

Facile Synthesis of Yolk-Shell Bi@C Nanospheres with Superior Li-ion Storage Performances

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Acta Metallurgica Sinica(English Letters) 2021年第3期34卷 347-353页

作者： Xijun Xu Dechao Zhang Zhuosen Wang Shiyong Zuo Jiadong Shen Zhengbo Liu Jun Liu Guangdong Provincial Key Laboratory of Advanced Energy Storage Materials School of Materials Science and EngineeringSouth China University of TechnologyGuangzhou 510641China School of Chemical Engineering and Light Industry Guangdong University of TechnologyGuangzhou 510006China

Recently,exploring appropriate anode materials for current commercial lithium-ion batteries(LIBs) with suitable operating potential and long cycle life has attracted extensive ***,a novel anode of Bi nanoparticles fully encapsulated in carbon nanosphere framework with uniform yolk-shell nanostructure was prepared via a facile hydrothermal *** to the special structure design,this anode of yolk-shell Bi@C can effectively moderate the volume exchange,avoid the aggregation of active Bi nanoparticle and provide superior kinetic during discharge/charge *** in the voltage of 0.01-2.0 V,yolk-shell Bi@C anode exhibits outstanding Li+storage performance(a reversible capacity over 200 mAh g-1after 400 cycles at 1.25 A g-1) and excellent rate capability(a capacity of 404,347,304,275,240,199 and 163 mAh g-1 at0.05,0.1,0.25,0.5,1.0,1.8 and 3.2 A g-1,respectively).This work indicates that rational design of nanostructured anode materials is highly applicable for the next-generation LIBs.

关键词： Yolk-shell structure Li-ion batteries Alloying type Bismuth rate capability

A novel approach for synthesis of expanded graphite and its enhanced lithium storage properties

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Journal of Energy Chemistry 2021年第8期30卷 292-298,I0007页

作者： Xianghong Chen Feng Xiao Yu Lei Haiyin Lu Jiakui Zhang Min Yan Jiantie Xu Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control National Engineering Laboratory for VOCs Pollution Control Technology and EquipmentSchool of Environment and EnergySouth China University of TechnologyGuangzhou 510640China

Relying on the great success in portable and smart devices,lithium ion batteries(LIBs)have been considered as one of the leading technologies in electric vehicles(EVs)and stationary energy storage systems(ESSs).With the rapid development of EVs and ESSs,the technology upgrading of LIBs is highly *** expected,it requires LIBs with improved power and energy densities[1].

关键词： Expanded graphite Holey Anodes Lithium ion batteries rate capability

LiMn_(2)O_(4) Microspheres:Synthesis,Characterization and Use As a Cathode in Lithium Ion Batteries

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Nano Research 2010年第10期3卷 733-737页

作者： Xiaoling Xiao Jun Lu Yadong Li Department of Chemistry and State Key Laboratory of New Ceramics and Fine Processing Tsinghua UniversityBeijing 100084China

Solid and hollow microspheres of LiMn_(2)O_(4) have been synthesized by lithiating MnCO_(3) solid microspheres and MnO_(2) hollow microspheres,*** LiMn_(2)O_(4) solid microspheres and hollow microspheres had a similar size of about 1.5μm,and the shell thickness of the hollow microspheres was only 100 *** used as a cathode material in lithium ion batteries,the hollow microspheres exhibited better rate capability than the solid ***,the tap density of the LiMn_(2)O_(4) solid microspheres(1.0 g/cm^(3))was about four times that of the hollow microspheres(0.27 g/cm^(3)).The results show that controlling the particle size of LiMn_(2)O_(4) is very important in terms of its practical application as a cathode material,and LiMn_(2)O_(4) with moderate particle size may afford acceptable values of both rate capability and tap density.

关键词： Cathode LiMn_(2)O_(4)microspheres tap density rate capability particle size

Synthesis and Electrochemical Properties of Porous α-Co（OH）2 and Co3O4 Microspheres

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Progress in Natural Science:Materials International 2017年第2期27卷 197-202页

作者： Yingying Xu Zhiyuan Liu Di Chen Yuanjun Song Rongming Wang Beijing Key Laboratory for Magneto-Photoelectrical Composite and Interface Science School of Mathematics and PhysicsUniversity of Science and Technology Beijing

Both α-Co（OH）2and Co3O4porous microspheres have been synthesized by the simple solvothermal process as well as subsequent treatment. The morphologies and structures of the as-synthesized products were characterized by X-ray diffraction（XRD）, scanning electron microscopy（SEM）, transmission electron microscopy（TEM）, and X-ray photoelectron spectroscopy（XPS）. Both samples have spherical structures consisting of nanosheets, with similar crystallinity. The electrochemical properties of both samples were further investigated. Both samples show excellent electrochemical performances including high specific capacity, good cycling stability and rate capability. All results show that these microspheres exhibit potential applications in energy storage field.

关键词： α-Co(OH)2 microspheres Co3O4 porous microspheres Supercapacitor Cycling stability rate capability