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Manipulating Horizontal Zn Deposition with Graphene Interpenetrated Zn Hybrid Foils for Dendrite-Free Aqueous Zinc Ion Batteries

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Energy & Environmental Materials 2023年第5期6卷 398-405页

作者： Yao Li Lisha wu Cong Dong Xiao Wang Yanfeng Dong Ronghuan He zhongshuai wu Department of Chemistry College of SciencesNortheastern UniversityShenyang 110819China State Key Laboratory of Catalysis Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023China University of Chinese Academy of Sciences Beijing 100049China Dalian National Laboratory for Clean Energy Chinese Academy of SciencesDalian 116023China

Aqueous zinc ion batteries(ZIBs)with intrinsic safety have great potentials in portable devices,but suffer from limited cycling life mainly caused by serious dendrite growth and unavoidable side reactions of Zn ***,graphene interpenetrated Zn(GiZn)hybrid foils are developed for dendrite-free and long-term Zn anodes for high-performance *** GiZn anode is prepared by interfacial assembly of reduced graphene oxide(rGO)on the skeletons of zinc foams,followed by mechanical compression into hybrid foils and drying *** presence of the rGO nanosheets in the GiZn hybrid foils provides abundant zincophilic sites to induce horizontal Zn deposition for Zn metal anodes without the growth of ***,the uniform distribution of rGO nanosheets endows the hybrid foils with superior conductivity and wetting ability with electrolytes for reduced interfacial *** a result,GiZn-based symmetric cells exhibit a small voltage hysteresis of 30.4 mV and remarkable areal capacity of 30 mAh cm^(-2)at 0.5 mA cm^(-2).Further,GiZn anodes also enable the corresponding aqueous Zn||MnO_(2)batteries with high capacity of 168.5 mAh g^(-1)at 8 C,superior to the counterpart with pure Zn foil anodes(72.7 mAh g^(-1)).Therefore,GiZn hybrid foil anodes will shed light on the rational construction of 2D material-interpenetrated Zn hybrid foil anodes for high-performance ZIBs.

关键词： aqueous zinc ion batteries dendrite-free Zn anodes graphene high capacity long cycling life

Embedding Co3O4 nanoparticles into graphene nanoscrolls as anode for lithium ion batteries with superior capacity and outstanding cycling stability

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Progress in Natural Science:Materials International 2018年第2期28卷 212-217页

作者： Zhigang Zhang Lianlian Gao Yanfeng Dong Jinping Zhao zhongshuai wu School of chemistry & chemical engineering Shandong University of Technology Dalian National Laboratory for Clean Energy Dalian Institute of Chemical Physics Chinese Academy of Sciences

CoOis a promising high-performance anode for lithium ion batteries(LIBs), but suffers from unsatisfied cyclability originating duo to low electrical conductivity and large volume expansion during charge and discharge process. Herein, we successfully constructed the CoOnanoparticles embedded into graphene nanoscrolls(GNSs) as advanced anode for high-performance LIBs with large capacity and exceptional cyclability. The onedimensional(1 D) CoO/GNSs were synthesized via liquid nitrogen cold quenching of large-size graphene oxide nanosheets and sodium citrate(SC) modified CoOnanoparticles, followed by freeze drying and annealing at400 °C for 2 h in nitrogen atmosphere. Benefiting from the interconnected porous network constructed by 1 D CoO/GNSs for fast electron transfer and rapid ion diffusion, and wrinkled graphene shell for significantly alleviating the huge volume expansion of CoOduring lithiation and delithiation. The resultant CoO/GNSs exhibited ultrahigh reversible capacity of 1200 mAh gat 0.1 C, outperforming most reported ***, they showed high rate capability of 600 m Ah g-1 at 5 C, and outstanding cycling stability with a high capacity retention of 90% after 500 cycles. Therefore, this developed strategy could be extended as an universal and scalable approach for intergrating various metal oxide materials into GNSs for energy storage and conversion applications.

关键词： Graphene nanoscrolls Co3O4 Anode Lithium ion batteries Energy storage

LiBF_(4)和LiDFOB双盐电解液实现硬碳负极的室温和低温电化学性能优化调控

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辽宁化工 2024年第7期53卷 984-989页

作者：林虎刘芳延谢英鹏吴忠帅沈阳化工大学化学工程学院辽宁沈阳110142 中国科学院大连化学物理研究所催化基础国家重点实验室辽宁大连116023

为克服商用六氟磷酸锂(LiPF_6)基电解液无法使锂离子电池在0℃下正常工作的问题,开发低温锂离子电池电解液成为领域研究重点。其中,四氟硼酸锂(LiBF_(4))基电解液因其低温下电荷转移阻抗较小,二氟草酸硼酸锂(LiDFOB)基电解液因其良好的... 详细信息

为克服商用六氟磷酸锂(LiPF_6)基电解液无法使锂离子电池在0℃下正常工作的问题,开发低温锂离子电池电解液成为领域研究重点。其中,四氟硼酸锂(LiBF_(4))基电解液因其低温下电荷转移阻抗较小,二氟草酸硼酸锂(LiDFOB)基电解液因其良好的成膜性能都备受学者关注。开发了一种新型LiBF_(4)和LiDFOB双盐电解液,通过优化与调控,使硬碳负极在室温和低温条件下同时具有优异的电化学性能。通过循环伏安、倍率和循环性能测试,系统比较了LiBF_(4)和LiDFOB及其混合双盐电解液对硬碳负极室温及低温电化学性能的影响。结果表明:LiBF_(4)+LiDFOB双盐电解液在兼顾硬碳室温电化学性能的同时,仍能实现硬碳优异的低温循环性能,100圈循环后硬碳仍有134 mAh·g^(-1)的可逆容量,显著优于硬碳在商用LiPF_6基电解液中的循环性能(100圈循环后可逆容量仅为2 mAh·g^(-1))。

关键词：锂离子电池低温电解液 LiBF_(4) LiDFOB

Preparation and interface modification of Si3N4f/SiO2 composites

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Journal of Materials Science & Technology 2019年第12期35卷 2767-2771页

作者： Yubo Houa Xuejin Yang Bin Li Duan Li Shitao Gao zhongshuai wu Science and Technology on Advanced Ceramic Fibers and Composites Laboratory National University of Defense TechnologyChangsha410073China School of Materials Sun Yat-sen UniversityGuangzhou510275China

In order to modify the interface, Si ON coating was introduced on the surface of silicon nitride fiber by perhydropolysilazane conversion method. Si-3N4f/SiO2 and Si-3N4f/Si ONc/SiO2 composites were prepared by sol-gel method to explore the influence of Si ON coating on the mechanical properties of *** results show that with the protection of Si ON coating, Si-3N4fiber enjoys a strength increase of up to 24.1% and Si-3N4f/Si ONc/SiO2 composites have a tensile strength of 170.5 MPa and a modulus of26.9 GPa, respectively. After 1000℃ annealing in air for 1 h, Si-3N4f/Si ONc/SiO2 composites retain 65.0%of their original strength and show a better toughness than Si-3N4f/SiO2 composites. The improvement of mechanical properties is attributing to the healing effect of Si ON coating as well as its intermediate coefficient of thermal expansion between Si-3N4fiber and SiO2 matrix.

关键词： Si3N4 fiber Perhydropolysilazane SiON coating Interface Mechanical properties

AC Line Filter Electrochemical Capacitors:Materials,Morphology,and Configuration

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Energy & Environmental Materials 2022年第4期5卷 1060-1083页

作者： Haichao Tang Yang Tian zhongshuai wu Yujia Zeng Yang Wang Yang Hou Zhizhen Ye Jianguo Lu State Key Laboratory of Silicon Materials Key Laboratory for Biomedical Engineering of Ministry of EducationSchool of Materials Science and EngineeringZhejiang UniversityHangzhou 310027China State Key Laboratory of Catalysis Dalian Institute of Chemical PhysicsChinese Academy of Sciences457 Zhongshan RoadDalian 116023China Dalian National Laboratory for Clean Energy Chinese Academy of Sciences457 Zhongshan RoadDalian 116023China College of Physics and Optoelectronic Engineering Shenzhen UniversityShenzhen 518060China Key Laboratory of Biomass Chemical Engineering of Ministry of Education College of Chemical and Biological EngineeringZhejiang UniversityHangzhou 310027China Wenzhou Key Laboratory of Novel Optoelectronic and Nano Materials Institute of WenzhouZhejiang UniversityWenzhou 325036China

Recently,more and more supercapacitors(SCs)have been developed as AC line filter capacitors,which are generally named AC line filter electrochemical capacitors(FECs).Compared to traditional bulky aluminum electrolytic capacitors(AECs),FECs have higher capacity and lower space occupancy,which makes them a strong ***,different from the common SCs for energy storage,it is necessary to consider the frequency response of the SCs for AC line filtering,where the contradiction between frequency response and specific capacitance is a *** researchers have proposed different solutions from the perspective of materials,morphology,and configuration for this *** on the above background,in this review,we briefly introduce the principle and parameters of AC line filter electrochemical *** systematically summarize the state-of-the-art progresses of FECs and discuss their possible application and development in the *** development of FECs can greatly promote the planarization,integration,and miniaturization of filter capacitors,and provide a new solution for the utilization of green and unstable energy.

关键词： AC line filtering fast response filter electrochemical capacitors specific capacitance supercapacitors

Sustainable Lignin-Derived Carbon as Capacity-Kinetics Matched Cathode and Anode towards 4.5 V High-Performance Lithium-Ion Capacitors

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Energy & Environmental Materials 2023年第4期6卷 98-105页

作者： Fangyan Liu Pengfei Lu Ying Zhang Feng Su Liangzhu Zhang Shuanghao Zheng Xiong Zhang Fangyuan Su Yanwei Ma zhongshuai wu State Key Laboratory of Catalysis Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023China Dalian National Laboratory for Clean Energy Chinese Academy of SciencesDalian 116023China Anhui Key Laboratory of Spin Electron and Nanomaterials School of Chemistry and Chemical EngineeringSuzhou UniversitySuzhou 234000China University of Chinese Academy of Sciences Beijing 100049China CAS Key Laboratory of Carbon Materials Institute of Coal ChemistryChinese Academy of SciencesTaiyuan 030001China Institute of Electrical Engineering Chinese Academy of SciencesBeijing 100190China School of Engineering Sciences University of Chinese Academy of SciencesBeijing 100049China Institute of Electrical Engineering and Advanced Electromagnetic Drive Technology Qilu ZhongkeJinan 250013China

The Li-ion capacitors(LICs)develop rapidly due to their double-high features of high-energy density and high-power ***,the relative low capacity of cathode and sluggish kinetics of anode seriously impede the development of ***,the precisely pore-engineered and heteroatomtailored defective hierarchical porous carbons(DHPCs)as large-capacity cathode and high-rate anode to construct high-performance dual-carbon LICs have been *** DHPCs are prepared based on triple-activation mechanisms by direct pyrolysis of sustainable lignin with urea to generate the interconnected hierarchical porous structure and plentiful heteroatominduced *** from these advanced merits,DHPCs show the well-matched high capacity and fast kinetics of both cathode and anode,exhibiting large capacities,superior rate capability and long-term *** experimental and computational results demonstrate the strong synergistic effect of pore and dopants for Li ***,the assembled dual-carbon LIC exhibits high voltage of 4.5 V,high-energy density of 208 Wh kg^(−1),ultrahigh power density of 53.4 kW kg^(−1)and almost zerodecrement cycling ***,the full device with high mass loading of 9.4 mg cm^(−2)on cathode still outputs high-energy density of 187 Wh kg^(−1),demonstrative of their potential as electrode materials for high-performance electrochemical devices.

关键词： capacity-kinetics matching defective hierarchical porous carbons high mass loading high power density Li-ion capacitors

电化学阴极剥离制备少层石墨烯及其微型超级电容器

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化工学报 2020年第6期71卷 2724-2734,F0003页

作者：周锋田利军高磊吴忠帅中国科学院大连化学物理研究所辽宁大连116023 大同煤矿集团有限责任公司双创中心山西大同037003

以石墨为原料高效、绿色、低成本制备少层石墨烯,对石墨烯的规模化生产和应用具有非常重要的意义。电化学阴极剥离法是一种高效制备少层石墨烯的方法,但已有的报道均采用有机溶液体系,成本高且不够绿色环保。开发了一种绿色的水溶液电... 详细信息

以石墨为原料高效、绿色、低成本制备少层石墨烯,对石墨烯的规模化生产和应用具有非常重要的意义。电化学阴极剥离法是一种高效制备少层石墨烯的方法,但已有的报道均采用有机溶液体系,成本高且不够绿色环保。开发了一种绿色的水溶液电化学剥离方法,在6 mol·L^-1 KOH溶液中,将石墨作为阴极进行快速剥离制备出少层石墨烯。获得的少层石墨烯具有含氧量低[1.27%(质量)]、缺陷少(ID/IG<0.035)、片径尺寸为5~10μm、高电导率(大于200 S·cm^-1)以及良好溶液可加性等特点。基于此,采用叉指型掩模板辅助过滤的方法可以高效制备出图案化石墨烯基平面微电极,在硫酸-聚乙烯醇凝胶电解液中,构筑的准固态微型电容器在没有金属集流体存在的情况下,表现出高扫描速率,达到了100000 mV·s^-1,弛豫时间常数低至24 ms;以1-乙基-3甲基-咪唑双(三氟甲基磺酰基)亚胺和双(三氟甲基磺酰基)亚胺锂盐的混合液为电解液,所构建的微型超级电容器的工作电压达4.0 V,体积能量密度为113 mW·h·cm^-3,远高于目前报道的微型超级电容器的电化学性能(<50 mW·h·cm^-3)。

关键词：电化学阴极剥离石墨烯石墨微型超级电容器

Synthesis,Characterization and Application Explorations of Graphene

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Synthesis,Characterization and Application Explorations of G...

Meta analysis of effects of tillage methods on grain yield and water use efficiency in wheat in Henan

中国力学学会学术大会'2009

作者： wu zhongshuai,Gao Libo,Ren Wencai,Cheng Huiming Shenyang National Laboratory for Materials Science, Institute of Metal Research,Chinese Academy of Sciences, Shenyang 110016,China,

Graphene,as a one-atom-thick flat allotrope of carbon,has been attracting increasing interests because of its unique structure,excellent properties and a variety of promising ***, the properties of graphene are very s...

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Meta analysis of effects of tillage methods on grain yield a...