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A flame-retardant binder with high polysulfide affinity for safe and stable lithium–sulfur batteries

Science China Chemistry 2024年第3期67卷 1028-1036页

作者： Guowei Yu Guofeng Ye Cheng Wang Chenyang Wang Zhaoyun Wang Pu Hu Yu Li Xi-Xi Feng Shuang-Jie Tan Min Yan Sen Xin Zhitian Liu Hubei Key Laboratory of Plasma Chemistry and Advanced Materials Hubei Engineering Technology Research Center of Optoelectronic and New Energy MaterialsSchool of Materials Science and EngineeringWuhan Institute of TechnologyWuhan 430205China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China CAS Key Laboratory of Molecular Nanostructure and Nanotechnology CAS Research/Education Center for Excellence in Molecular SciencesBeijing National Laboratory for Molecular Sciences(BNLMS)Institute of ChemistryChinese Academy of Sciences(CAS)Beijing 100190China University of Chinese Academy of Sciences Beijing 100049China

Lithium-sulfur(Li-S) batteries have shown promises for the next-generation, high-energy electrochemical storage, yet are hindered by rapid performance decay due to the polysulfide shuttle in the cathode and safety concerns about potential thermal runaway. To address the above challenges, herein, we show a flame-retardant cathode binder that simultaneously improves the electrochemical stability and safety of batteries. The combination of soft and hard segments in the polymer framework of binders allows high flexibility and mechanical strength for adapting to the drastic volume change during the Li(de)intercalation of the S cathode. The binder contains a large number of polar groups, which show the high affinity to polysulfides so that they help to anchor active S species at the cathode. These polar groups also help to regulate and facilitate the Li-ion transport, promoting the kinetics of polysulfide conversion reaction. The binder contains abundant phosphine oxide groups, which, in the case of battery's thermal runaway, decompose and release PO· radicals to quench the combustion reactions and stop the fire. Consequently, Li-S batteries using the new cathode binder show the improved electrochemical performance, including a low-capacity decay of 0.046% per cycle for 800 cycles at 1 C and favorable rate capabilities of up to 3 C. This work offers new insights on the practical realization of high-energy rechargeable batteries with stable storage electrochemistry and high safety.

关键词： lithium–sulfur battery polymer binder polysulfide affinity flame retardancy

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Light-enhanced metal-support interaction for synergetic photo/thermal catalytic formaldehyde oxidation

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Journal of materials Science & technology 2023年第36期167卷 74-81页

作者： Jiawei Ye Linxi Wang Bicheng Zhu Bei Cheng Rongan He Laboratory of Solar Fuel Faculty of Materials Science and ChemistryChina University of GeosciencesWuhan 430078China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China Hunan Key Laboratory of Applied Environmental Photocatalysis Changsha UniversityChangsha 410022China

The strong metal-support interaction(SMSI)plays a pivotal role in regulating electronic properties and activating surface oxygen *** this work,we report light-irradiation-modulated SMSI for enhanced formaldehyde(HCHO)***,the SMSI between Pt nanoparticles(NPs)and Bi_(2)MoO_(6)cre-ated surface-active oxygen at Pt-Bi_(2)MoO_(6)interfaces to activate HCHO to dioxymethylene(DOM).Notably,light irradiation boosted the SMSI and catalytic ***,photogenerated holes in Bi_(2)MoO 6 im-proved HCHO adsorption and activation,while photogenerated electrons migrated from Bi_(2)MoO_(6)to Pt NPs to promote O_(2)adsorption and activation,accelerating the oxidation of DOM to CO_(2)and H_(2)*** light-modulated SMSI and the synergy between photocatalysis and thermocatalysis lead to enhanced cat-alytic oxidation activity,providing a practical strategy for indoor volatile organic compound(VOC)de-composition under ambient conditions.

关键词： Formaldehyde oxidation Strong metal-support interaction Photocatalysis Photo-thermal synergy Electron transfer

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Mg-gallate metal-organic framework-based sprayable hydrogel for continuously regulating oxidative stress microenvironment and promoting neurovascular network reconstruction in diabetic wounds

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Bioactive materials 2024年第8期38卷 181-194页

作者： Chenxi Lian Jiawei Liu Wenying Wei Xiaopei Wu Takashi Goto Haiwen Li Rong Tu Honglian Dai State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan430070China National Energy Key Laboratory for New Hydrogen-ammonia Energy Technologies FoshanXianhu LaboratoryFoshan528200China Chaozhou Branch of Chemistry and Chemical Engineering Guangdong Laboratory Chaozhou 521000China

Chronic diabetic wounds are the most common complication for diabetic *** to high oxidative stress levels affecting the entire healing process,treating diabetic wounds remains a ***,we present a strategy for continuously regulating oxidative stress microenvironment by the catalyst-like magnesium-gallate metal-organic framework(Mg-GA MOF)and developing sprayable hydrogel dressing with sodium alginate/chitosan quaternary ammonium salts to treat diabetic *** quaternary ammonium salts with antibacterial properties can prevent bacterial *** continuous release of gallic acid(GA)effectively eliminates reactive oxygen species(ROS),reduces oxidative stress,and accelerates the polarization of M1-type macrophages to M2-type,shortening the transition between inflammation and proliferative phase and maintaining redox ***,magnesium ions adjuvant therapy promotes vascular regeneration and neuronal formation by activating the expression of vascular-associated *** hydrogel dressings with antibacterial,antioxidant,and inflammatory regulation rapidly repair diabetic wounds by promoting neurovascular network reconstruction and accelerating re-epithelialization and collagen *** study confirms the feasibility of catalyst-like MOF-contained sprayable hydrogel to regulate the microenvironment continuously and provides guidance for developing the next generation of non-drug diabetes dressings.

关键词： Chronic diabetic wounds Bioactive MOF Antioxidant Anti-inflammation Enzymatic catalysis Neurovascular network reconstruction

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Ultraviolet Photodetector based on Sr_(2)Nb_(3)O_(10) Perovskite Nanosheets

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Journal of Wuhan University of technology(materials Science) 2024年第2期39卷 282-287页

作者：张斌斌 JIA Mengmeng LIANG Qi WU Jinsong ZHAI Junyi 李宝文 School of Materials Science and Engineering Wuhan University of TechnologyWuhan 430070China CAS Center for Excellence in Nanoscience Beijing Institute of Nanoenergy and NanosystemsChinese Academy of SciencesBeijin 100083China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China

Liquid-phase exfoliation was employed to synthesize Sr_(2)Nb_(3)O_(10) perovskite nanosheets with thicknesses down to 1.76 *** electron microscopy(TEM),atomic force microscope(AFM),X-ray photoelectron spectrometer(XPS),and other characterization techniques were used to evaluate the atomic structure and chemical composition of the exfoliated nanosheets.A UV photodetector based on individual Sr_(2)Nb_(3)O_(10) nanosheets was prepared to demonstrate the application of an ultraviolet(UV) *** UV photodetector exhibited outstanding photocurrent and responsivity with a responsivity of 3×10^(5) A·W^(-1) at 5 V bias under 280 nm illumination,a photocurrent of 60 nA,and an on/off ratio of 3×10^(2).

关键词： perovskite nanosheets liquid-phase exfoliation ultraviolet photodetector

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4D printing for future manufacturing

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Science China materials 2023年第11期66卷 4517-4518页

作者： Chaolin Tan Ji Zou Zhengyi Fu Singapore Institute of Manufacturing Technology(SIMTech) Agency for ScienceTechnology and Research(A*STAR)Singapore 636732Singapore State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China

Additive manufacturing(AM),also called three-dimensional(3D)printing,offers disruptive design freedom and manufacturing flexibility due to the layer-wise incremental formation manner of *** in AM techniques provide unique advantages and feasibilities for overcoming challenges arising from fabricating parts with complexities in geometry,materials,and properties.

关键词： printing properties freedom

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Methylthio side-chain modified quinoidal benzo-[1,2-b:4,5-b']dithiophene derivatives for high-performance ambipolar organic field-effect transistors

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Science China Chemistry 2024年第10期67卷 3357-3365页

作者： Li Chen Xiaoqi Luo Nuoya Li Shaoqian Peng Qing Jiang Di Wu Jianlong Xia State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Center of Smart Materials and DevicesWuhan University of TechnologyWuhan 430070China School of Chemistry Chemical Engineering and Life ScienceWuhan University of TechnologyWuhan 430070China Department of Chemistry National University of SingaporeSingapore 117543Singapore

Quinoidal small molecule semiconductors hold huge potential in ambipolar organic field-effect transistors(OFETs)and organic spintronic ***,two quinoidal molecules with methylthio side chains were synthesized to develop molecular semiconductors with high ambipolar mobility,designated QBDTS and *** theoretical calculation results reveal that QBDTS has a closed-shell structure while QTBDTS showed an open-shell structure with a biradical character(y0)of 0.46 and its magnetic properties were further investigated using electron paramagnetic resonance(EPR)and superconducting quantum interference device(SQUID)*** methyl side chains showed a large impact on the molecular orbital *** HOMO/LUMO levels of QBDTS and QTBDTS were measured to be-5.66/-4.56 and-5.27/-4.48 eV,respectively,which are favorable for ambipolar charge transport in ***,the spin-coated QBDTS displayed hole and electron mobilities of 0.01 and 0.5 cm^(2)V^(-1)s^(-1)while QTBDTS showed a record high hole mobility of 1.8 cm^(2)V^(-1)s^(-1)and electron mobility of 0.3 cm^(2)V^(-1)s^(-1).Moreover,comparative studies of the thin film morphologies also manifested the beneficial influence of methyl side chains on film crystallinity and molecule *** results strongly proved that methyl side chain engineering can be a simple but efficient strategy for modulating electronic properties and molecular stacking *** work also represents a big advancement for quinoidal molecular semiconductors in ambipolar OFET applications.

关键词： side-chain modification quinoidal molecules ambipolar diradicals organic field-effect transistors

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Recent advances in protective technologies against copper corrosion

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Journal of materials Science & technology 2024年第34期201卷 75-94页

作者： Xiaomeng She Jian Peng Yujie Qiang Yue Zhou Song Zhang State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology122 Luoshi RoadWuhan 430070China National Center for Materials Service Safety University of Science and Technology BeijingBeijing 100083China School of Chemistry Chemical Engineering and Life ScienceWuhan University of TechnologyWuhan 430070China

Copper,one of the most frequently utilized non-ferrous metals,finds extensive applications in the elec-trical industry,mechanical engineering,construction industry,and arm ***-term exposure to corrosive environments including moisture,sulfur,chlorine,and microbes induces corrosion,a signifi-cant factor contributing to material ***,numerous scientific endeavors have been directed towards the prevention of copper ***,coating copper with innovative materials like graphene,boron nitride,and various conductive polymers has proven effective in thwarting ***,the introduction of new organic compounds,including azole derivatives,amino acids,and N-heterocyclic carbenes,has bolstered the eco-friendliness and efficiency of corrosion inhibitors and molecular passivation ***,these approaches have been extensively investigated for their efficacy in antioxidation of copper *** study provides a comprehensive review of the latest advancements in protective technologies,such as anti-corrosion coatings,corrosion inhibitors,and molecular passivation layers,aimed at countering copper corrosion under aggressive conditions.

关键词： Copper corrosion Coating Corrosion inhibitor Molecular passivation

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Metal-nitrogen-doped hybrid ionic/electronic conduction triple-phase interfaces for high-performance all-solid-state lithium-sulfur batteries

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Nano Research 2023年第8期16卷 10956-10965页

作者： Hao Li Jiangping Song Fanglin Wu Rui Wang Dan Liu Haolin Tang A State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China Department of Chemistry School of ChemistryChemical Engineering and Life SciencesWuhan University of TechnologyWuhan 430070China

The point-to-point contact mechanism in all-solid-state Li-S batteries(ASSLSBs)is not as efficient as a liquid electrolyte which has superior mobility in the electrode,resulting in a slower reaction kinetics and inadequate ionic/electronic conduction network between the S(or Li_(2)S),conductive carbon,and solid-state electrolytes(SSEs)for achieving a swift(dis)charge ***,a series of hybrid ionic/electronic conduction triple-phase interfaces with transition metal and nitrogen co-doping were *** graphitic ordered mesoporous carbon frameworks(TM-N-OMCs;TM=Fe,Co,Ni,and Cu)serve as hosts for Li_(2)S and Li_(6)PS_(5)Cl(LPSC)and provide abundant reaction sites on the triple *** from both experimental and computational research display that the combination of Cu-N co-dopants can promote the Li-ion diffusion for rapid transformation of Li_(2)S with adequate ionic(6.73×10^(−4)S·cm^(−1))/electronic conductivities(1.77×10^(−2)S·cm^(−1))at 25℃.The as-acquired Li_(2)S/Cu-N-OMC/LPSC electrode exhibits a high reversible capacity(1147.7 mAh·g^(−1))at 0.1 C,excellent capacity retention(99.5%)after 500 cycles at 0.5 C,and high areal capacity(7.08 mAh·cm^(−2)).

关键词： all-solid-state lithium-sulfur batteries triple-phase interfaces ordered mesoporous carbons mixed ion/electron conductivities Li_(6)PS_(5)Cl solid electrolyte

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Visible-light-induced controllable transformations of cumulative aryldienes through an energy transfer process

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Science China Chemistry 2025年第3期68卷 987-1001页

作者： Ling Qian Ziqi Yu Jiaxin Liu Yin Wei Min Shi Key Laboratory for Advanced Materials and Institute of Fine Chemicals Key Laboratory for Advanced Materials and Feringa Nobel Prize Scientist Joint Research CenterSchool of Chemistry&Molecular EngineeringEast China University of Science and TechnologyShanghai 200237China State Key Laboratory of Organometallic Chemistry Center for Excellence in Molecular SynthesisUniversity of Chinese Academy of SciencesShanghai Institute of Organic ChemistryChinese Academy of SciencesShanghai 200032China Key Laboratory of Fluorine and Nitrogen Chemistry and Advanced Materials Shanghai Institute of Organic ChemistryUniversity of Chinese Academy of SciencesChinese Academy of SciencesShanghai 200032China

In this work,we report a visible light-induced energy transfer process related photochemical protocol of cumulative diene containing compounds for the construction of benzocyclohexene skeletons or the corresponding aromatized structures through an energy transfer process,1,5-hydrogen atom transfer and a 6πelectrocyclization or demethoxylation in the presence of different photocatalysts such as[Ir(dF(Me)ppy)_(2)(dtbbpy)]PF_(6) or *** newly developed photochemical strategy is characterized by mild conditions,broad substrate applicability,good functional group tolerance and good *** mechanistic paradigm was clarified by deuterium labeling,kinetic,photophysical and electrochemical analyses,control experiments and density functional theory(DFT)*** transformation of the obtained product to the drug-like molecules such as Sertraline and the luminescent conjugated aromatic compounds has also been disclosed.

关键词： visible-light photocatalysis EnT process 1,5-HAT remote C(sp^(3))-H bond activation

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ZnIn_(2)S_(4)/MOF S-scheme photocatalyst for H_(2)production and its femtosecond transient absorption mechanism

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Journal of materials Science & technology 2024年第30期197卷 183-193页

作者： Jiajie Cai Bowen Liu Shumin Zhang Linxi Wang Zhen Wu Jianjun Zhang Bei Cheng State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China Hunan Key Laboratory of Applied Environmental Photocatalysis Changsha UniversityChangsha 410022China Laboratory of Solar Fuel Faculty of Materials Science and ChemistryChina University of Geosciences68 Jincheng StreetWuhan 430078China Department of Chemical Engineering Ordos Institute of TechnologyOrdos 017000China

Photocatalytic water splitting is a popular pathway for H_(2)evolution,but the slow water oxidation greatly hampers the overall *** harness photogenerated holes in an efficient and lucrative way,the wa-ter oxidation reaction is replaced by selective oxidation of organic compounds to achieve simultaneous production of H_(2)and value-added ***,an alternative tactic is reported where an organic compound(benzylamine,BA)not only serves as the precursor for N-benzylidene-benzylamine(NBBA)production but also provides hydrogen sources for H_(2)evolution,achieving the goal under anhydrous *** process is realized using an S-scheme photocatalyst composed of ZnIn_(2)S_(4)and the UiO-66-NH_(2)(U6N)metal-organic framework(MOF).The S-scheme carrier transfer mechanism was validated by in-situ irradiated X-ray photoelectron spectroscopy(ISI-XPS)and femtosecond transient absorption(fs-TA)*** increased carrier efficiency and reinforced redox power endowed by the S-scheme heterojunction,the composite performed better than ZnIn2 S4 and *** performance was further ameliorated by Pt-cocatalyst modification,achieving an H_(2)production rate of 5275μmol h^(-1)g^(-1)as well as BA conversion of 94.3%with 99.3%NBBA *** studies reveal that BA is ini-tially oxidized to carbon-centered radicals and further to imines along with the release of *** imine reacts with another BA molecule to form NBBA,while the protons are reduced to H_(2).This work provides new insights into concurrent photocatalytic H_(2)production and selective organic oxidation from organic amines using S-scheme photocatalysts.

关键词： Photocatalysis S-scheme heterojunction Hydrogen production Selective oxidation Benzylamine Femtosecond transient absorption

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