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Hydrogen-bonded organic framework modified separator for simultaneously enhancing the safety and electrochemical performance of Ni-rich lithium-ion battery

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Journal of Energy Chemistry 2024年第9期96卷 72-78页

作者： Chengyu Han Yu Cao Ming Yang Yuhan Wang Di Tang Shaojie Zhang Yiran Jia Yiming Zhang Hern Kim Fusheng Pan Zhongyi Jiang Jie Sun Key Laboratory for Green Chemical Technology of Ministry of Education School of Chemical Engineering and TechnologyTianjin UniversityTianjin 300072China Science and Technology on Power Sources Laboratory Tianjin Institute of Power SourcesTianjin 300384China Haihe Laboratory of Sustainable Chemical Transformations Tianjin 300192China Quzhou Institute for Innovation in Resource Chemical Engineering Quzhou 324000ZhejiangChina Department of Energy Science and Technology Director Environmental Waste Recycle InstituteYongin 17058Republic of Korea School of Chemistry and Chemical Engineering Hainan UniversityHaikou 570228HainanChina

Nickel-rich layered oxide cathode(LiNi_(x)Co_(y)Mn_(1−x−y)O_(2),x>0.5,NCM)shows substantial potential for applications in longer-range electrical ***,the rapid capacity decay and serious safety concerns impede its practical *** work provides a hydrogen-bonded organic framework(HOF)modification strategy to simultaneously improve the electrochemical performance,thermal stability and incombustibility of *** cyanurate(MCA),as a low-cost and reliable flame-retardant HOF,was implemented in the separator modification layer,which can prevent the battery short circuit even at a high *** addition,the supermolecule properties of MCA provide unique physical and chemical microenvironment for regulating ion-transport behavior in *** MCA coating layer enabled the nickel-rich layered oxide cathode with a high-capacity retention of 90.3%after 300 cycles at 1.0 ***,the usage of MCA in lithium-ion batteries(LIBs)affords a simple,low-cost and efficient strategy to improve the security and service life of nickel-rich layered cathodes.

关键词： Hydrogen-bonded organic framework modified separator Ni-richlayered oxide cathode Thermal runaway Li^(+)transference number

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A lithium sulfonylimide COF-modified separator for highperformance Li-S batteries

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Nano Research 2023年第11期16卷 12601-12607页

作者： Jie Liu Jinping Zhang Jie Zhu Ruiqi Zhao Yamin Zhang Yanfeng Ma Chenxi Li Hongtao Zhang Yongsheng Chen The Centre of Nanoscale Science and Technology and Key Laboratory of Functional Polymer Materials Institute of Polymer ChemistryCollege of ChemistryNankai UniversityTianjin 300071China State Key Laboratory of Elemento-Organic Chemistry Nankai UniversityTianjin 300071China Renewable Energy Conversion and Storage Center(RECAST) Nankai UniversityTianjin 300071China State Key Laboratory of Applied Organic Chemistry College of Chemistry and Chemical EngineeringLanzhou UniversityLanzhou 730000China

Lithium-sulfur(Li-S)batteries are highly regarded as the next-generation high-energy-density secondary batteries due to their high capacity and large theoretical energy ***,the practical application of these batteries is hindered mainly by the polysulfide shuttle ***,we designed and synthesized a new lithium sulfonylimide covalent organic framework(COF)material(COF-LiSTFSI,LiSTFSI=lithium(4-styrenesulfonyl)(trifluoromethanesulfonyl)imide),and further used it to modify the common polypropylene(PP)separator of Li-S *** COF-LiSTFSI with sulfonylimide anion groups features stronger electronegativity,thus can effectively facilitate the lithium ion conduction while significantly suppress the diffusion of polysulfides via the electrostatic *** with the unmodified PP separator,the COF-LiSTFSI modified separator results in a high ionic conductivity(1.50 mS·cm^(−1))and Li+transference number(0.68).Consequently,the Li-S battery using the COF-LiSTFSI modified separator achieves a high capacity of 1229.7 mAh·g^(−1)at 0.2 C and a low decay rate of only 0.042%per cycle after 1000 cycles at 1 C,compared with those of 941.5 mAh·g^(−1)and 0.061%using the unmodified PP separator,*** results indicate that by choosing suitable functional groups,an effective strategy for COF-modified separators could be developed for high-performance Li-S batteries.

关键词： covalent organic frameworks lithium sulfonylimide ion selective modified separator lithium-sulfur batteries

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Fe3C-N-doped carbon modified separator for high performance lithium-sulfur batteries

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Journal of Energy Chemistry 2019年第12期28卷 101-108页

作者： Hongyu Pan Zhong Tan Haihui Zhou Lanlan Jiang Zhongyuan Huang Qjaoxia Feng Qiang Zhou Shuai Ma Yafei Kuang State Key Laboratory for Chemo/Biosensing and Chemometrics Hunan UniversityChangsha 410082HunanChina College of Chemistry and Chemical Engineering Hunan UniversityChangsha 410082HunanChina

A new Fe3C-N-doped reduced graphene oxide(Fe3C-N-rGO)prepared by a facile method is used as a separator for high performance lithium-sulfur(Li-S)*** Fe3C-N-rGO is coated on the surface of commercial polypropylene separator(Celgard 2400)close to the sulfur *** special nanotubes are in-situ catalyzed by Fe3C *** could entrap lithium polysulfides(Li PSs)to restrain the shuttle effect and reduce the loss of active *** battery with the modified separator and sulfur cathode shows an excellent cycle *** has a high rate performance,580.5 mAh/g at the high current rate of 4 C relative to 1075 mAh/g at 0.1 *** also has an initial discharge capacity of 774.8 m Ah/g measured at 0.5 C and remains 721.8 mAh/g after 100 cycles with a high capacity retention of 93.2%.The outstanding performances are notable in recently reports with modified separator.

关键词： Fe3C-N-doped reduced graphene oxide modified separator Sulfur cathode Cyclic and rate performance

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Modification of separators with neodymium oxide/graphene composite to enhance lithium-sulfur battery performance

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Journal of Rare Earths 2024年第9期42卷 1730-1739,I0004页

作者： Liyuan Zheng Zhijun Zhu Yutong Kuai Qiaotong Huang Mingkun Zhang Yi Wang Aiju Li School of Chemistry South China Normal UniversityGuangzhou510006China Department of Mechanic and Electronic Engineering Zhongkai University of Agriculture and EngineeringGuangzhou510225China

Lithium-sulfur(Li-S) batteries have generated significant attention due to their high theoretical specific capacity and energy density among a host of energy storage power ***,the lithium polysulfide dissolution shuttle that occurs within Li-S batteries will lead to capacity deterioration and inadequate cycling *** the paper,we proposed a measure to deal with the above problems by modifying the separator with Nd_(2)O_(3)/graphene composite in Li-S ***'s special chemical properties and structural qualities make it an excellent choice for Li-S ***,Nd_(2)O_(3) has a strong binding affinity with lithium polysulfide due to its low electronegativity,which exhibits Lewis' s acidity and forms strong interactions with lithium polysulfide,which is strongly Lewis *** utilizing these advantageous properties,Li-S batteries assembling Nd_(2)O_(3)-decorated reduced graphite oxide modified polypropylene separators(Nd_(2)O_(3)/RGO/PP) demonstrate outstanding electrochemical performance,including a mere 0.0525% capacity attenuation rate under 2C during 1000 cycles and with exceptional rate performance of 614 mAh/g even at *** study presents valuable knowledge for effectively modifying separators using rare earth oxides to incorporate graphene,ultimately promoting the practical application of Li-S batteries.

关键词： Lithium-sulfur battery Rare earths Neodymium oxide Graphene modified separator

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Modulating of MoSe_(2)functional plane via doping-defect engineering strategy for the development of conductive and electrocatalytic mediators in Li-S batteries

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Journal of Energy Chemistry 2022年第12期75卷 512-523,I0013页

作者： Mohammed A.Al-Tahan Yutao Dong Aml E.Shrshr Xiyang Kang Hui Guan Yumiao Han Zihao Cheng Weihua Chen Jianmin Zhang College of Chemistry Zhengzhou UniversityZhengzhou 450001HenanChina College of Science Henan Agricultural UniversityZhengzhou 450002HenanChina Chemistry Department Faculty of ScienceAl-Azhar UniversityAssiut 71524Egypt

The lithium polysulfide shuttle and sluggish sulfur reaction kinetics still pose significant challenges to lithium-sulfur(Li-S)*** functional plane of Fe-MoSe_(2)@r GO nanohybrid with abundant defects has been designed and applied in Li-S batteries to develop the functional separator and multi-layer sulfur *** cell with a functional separator exhibits a retention capacity of 462 m Ah g^(-1)after the 1000th at 0.5 C and 516 m Ah g^(-1)after the 600th at 0.3 *** at low electrolyte conditions(7.0μL_(mgsulfur)^(-1)and 15μL_(mgsulfur)^(-1))under high sulfur loadings(3.46 mg cm^(-2)and 3.73 mg cm^(-2)),the cell still presents high reversible discharge capacities 679 and 762 m Ah g^(-1)after 70 cycles,***,at sulfur loadings up to 8.26 and 5.2 mg cm^(-2),the cells assembled with the bi-layers sulfur cathode and the tri-layers sulfur cathode give reversible capacities of 3.3 m Ah cm^(-2)after the 100th cycle and 3.0 m Ah cm^(-2)after the 120th cycle,*** research not only demonstrates that the FeMoSe_(2)@r GO functional plane is successfully designed and applied in Li-S batteries with superior electrochemical performances but also paves the novel way for developing a unique multi-layer cathode technique to enhance and advance the electrochemical behavior of Li-S cells at a high-sulfur-loading cathode under lean electrolyte/sulfur(E/S)ratio.

关键词： Lithium-sulfur batteries modified separator Fe-MoSe_(2)@rGO Multi-layers cathode Defect engineering

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Towards High-performance Lithium-Sulfur Batteries: the Modification of Polypropylene separator by 3D Porous Carbon Structure Embedded with Fe3C/Fe Nanoparticles

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Chemical Research in Chinese Universities 2022年第1期38卷 147-154页

作者： LIU Yusi ZHAO Xinghe LI Sesi ZHANG Qiang WANG Kaixue CHEN Jiesheng Shanghai Electrochemical Energy Devices Research Center School of Chemistry and Chemical EngineeringShanghai Jiao Tong UniversityShanghai 200240P.R.China

Lithium-sulfur(Li-S)batteries with high energy densities have received increasing ***,the electrochemical performance of Li-S batteries is still far from the satisfactory of the practical application,which can be mainly attributed to the shuttling of polysulfides and the slow reaction kinetics of polysulfide *** address this issue,a 3D porous carbon structure constructed by 2D N-doped graphene and 1D carbon nanotubes with embedded Fe3C/Fe nanoparticles(NG@Fe3C/Fe)was designed and prepared by a simple programmed calcination method for the modification of polypropylene(PP)*** Fe3C/Fe nanoparticles demonstrate an excellent catalytic conversion and strong chemisorption towards polysulfides,while the unique architecture of N-doped graphene promotes the Li+/electron transfer and the physical adsorption of *** electrochemical performance of the Li-S batteries with the NG@Fe3C/Fe-modified separator is significantly improved.A large discharge capacity of 1481 mA∙h∙g-1 is achieved at 0.2 C(1 C=1675 mA/g),and a high capacity of 601 mA∙h∙g-1 is maintained after discharged/charged for 500 cycles at a current rate of 1 *** work provides a new approach for the development of high-performance Li-S batteries through the modification of the PP separator by rationally designed composites with large adsorption capability to polysulfides,good wettability to the electrolyte and high catalytic property.

关键词： Fe/Fe3C nanoparticle modified separator Electro-catalytic effect Shuttle effect Lithium-sulfur battery

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MXenes for metal-ion and metal-sulfur batteries:Synthesis,properties,and electrochemistry

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Materials Reports(Energy) 2022年第1期2卷 17-40页

作者： Siyang Liu Zihui Song Xin Jin Runyue Mao Tianpeng Zhang Fangyuan Hu School of Materials Science and Engineering State Key Laboratory of Fine ChemicalsKey Laboratory of Energy Materials and Devices(Liaoning Province)Dalian University of TechnologyDalian116024China

In 2011,a new class of 2D materials was discovered;after 2012,they began to be concerned;in 2017,the“gold rush”of the materials was triggered,and they are exactly MXenes.2D MXenes,a new class of transition metal carbides,carbonitrides and nitrides,have become the star and cutting-edge research materials in the field of emerging batteries systems due to their unique 2D structure,abundant surface chemistry,and excellent physical and electrochemical *** review focuses on the MXene materials and summarizes the recent advancements in the synthesis techniques and properties,in addition to a detailed discussion on the electrochemical energy storage applications,including alkali-ion(Li^(+),Na^(+),K^(+))storage,lithium-sulfur(Li–S)batteries,sodiumsulfur(Na–S)batteries,and metal anode *** attentions are given to the elaborate design of nano-micro structures of MXenes for the various roles as electrodes,multifunctional components,S hosts,modified separators,and metal anode protective *** paper ends with a prospective summary of the promising research directions in terms of synthesis,structure,properties,analysis,and production on MXene materials.

关键词： MXenes Electrochemical energy storage Lithium-ion battery Sodium-ion battery Lithium-sulfur battery Sodium-sulfur battery Metal anode protective layer modified separator

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