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Liquid-phase Exfoliated WS2-Graphene Composite Anodes for Potassium-ion Batteries

Chinese Journal of Structural Chemistry 2020年第3期39卷 493-499,378页

作者： WANG Wei BAO Jing-Ze SUN Chuan-Fu CAS Key Laboratory of Design and Assembly of Functional Nanostructures and Fujian Key Laboratory of NanomaterialsFujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhou 350002China University of Chinese Academy of Sciences Beijing 100190China

Tungsten disulfide(WS2) has been recognized as a promising anode material for rechargeable potassium-ion batteries(PIBs). However, its K-ion intercalation capacity is limited to ~60 mAh·g^(-1). Here, we report a WS2-graphene composite anode which is fabricated through simple filtration of liquid-phase exfoliated WS2 and graphene nanosheet delivers a significantly improved specific capacity of 137 mAh·g^(-1) at a current density of 10 mA·g^(-1). The composite anodes also exhibit remarkable rate capability and long-term cyclability over 500 cycles. These results highlight the WS2-graphene composite structure as a promising anode material for long lifespan rechargeable potassium-ion batteries.

关键词： tungsten disulfide liquid-phase exfoliation K-ion battery grapheme

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A Hexanuclear Titanium-Oxo Cluster with Both Photoprotection and Antioxidant Properties

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SSRN 2024年

作者： Wang, Jia-Ning Shen, Chuan-Qi Liu, Jin Nan, Zi-Ang Huang, You-Gui CAS Key Laboratory of Design and Assembly of Functional Nanostructures Fujian Provincial Key Laboratory of Nanomaterials Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences Fujian Fuzhou350002 China Xiamen Key Laboratory of Rare Earth Photoelectric Functional Materials Xiamen Institute of Rare Earth Materials Haixi Institutes Chinese Academy of Sciences Fujian Xiamen361021 China University of Chinese Academy of Sciences Beijing100049 China

Two hexanuclear titanium-oxo clusters, Ti6O6(OiPr)6L16·2CH3CN (1) and Ti6O4(OiPr)10(OiPrL2)2L22 (2), were synthesized via solvothermal reactions (HL1 = o-nitrobenzoic acid and H2L2 = 1,3-bisbenzyl-2-oxoimidazolidine-4,5-dicarboxylic acid). Compound 1 is a cluster with an octahedral {Ti6O6} core, while compound 2 features as a cluster with chair-shaped {Ti6O4} core. Both the compounds show strong UV absorptions, but their activities to radicals including 2,2-diphenylpicrylhydrazyl (DPPH), hydroxyl, and azinobis-(3-ethylbenzthiazoline-6-sulphonate) (ABTS) are significantly different. In contrast to the silence of all of the three radicals to compound 1, compound 2 is able to efficiently scavenge all of them. This obvious difference is attributed to that compound 2 shows higher reducibility, which is probably intrinsically related to electronic donating ligands L2 and OiPrL2. The coexistence of strong UV absorption and great antioxidant activity enables compound 2 to protect skin against photoaging and enhance skin health effectively. These results indicate titanium-oxo clusters bearing redox active ligands are potential for next-generation skincare products. © 2024, The Authors. All rights reserved.

关键词： Ligands

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Exploring the impact of basicity and oxygen vacancy for efficient CO2 adsorption in solid oxide electrolysis cells

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Journal of Power Sources 2025年 645卷

作者： Khan, Muhammad Nadeem Ye, Lingting Xie, Kui Key Laboratory of Design and Assembly of Functional Nanostructures Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences Fuzhou350002 China University of Chinese Academy of Sciences Beijing100049 China School of Mechanical Engineering Shanghai Jiao Tong University 800 Dongchuan Road Shanghai200240 China Fujian Normal University Fuzhou350117 China

A novel approach to boost the catalytic performance of cathode materials in solid oxide electrolysis cells (SOECs) is developed by modifying the oxygen ion basicity of the perovskite structures through strategic cation doping. In this study, Sr2Fe1.5-xCuxMo0.5O6−δ (SFCxM) perovskites are synthesized and systematically characterized to evaluate their oxygen ion basicity and electrocatalytic activity and assess their effects on the electrochemical performance. The Sr2Fe0.75Cu0.75Mo0.5O6−δ (SFCu0.75M) cathode demonstrates promising performance in experimental tests, achieving a current density of 0.91 A cm−2 at 1.8 V and 850 °C, with stable operation over 100 h in a CO2 atmosphere. These findings confirm that doping with higher-electronegativity ions, such as Cu, reduces the oxygen ion basicity, increases the oxygen vacancy concentration in the cathode, and enhances electrochemical performance. This approach provides crucial insights for engineering sophisticated electrodes suitable for direct carbon dioxide electrolysis and other catalytic electrochemical processes. © 2025 Elsevier B.V.

关键词： Electrolysis

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A new class of nitrobenzoic acid-based AIE photosensitizers for highly efficient photodynamic antibacterial therapy

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Science China Materials 2021年第10期64卷 2601-2612页

作者： Huanhuan Wang Xiaohong Pan Yaqi Wang Wenzhen Liu Tao Dai Binbin Yuan Xueyuan Chen Zhuo Chen State Key Laboratory of Structural Chemistry CAS Key Laboratory of Design and Assembly of Functional NanostructuresFujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhou 350002China University of Chinese Academy of Sciences Beijing 100049China

hotodynamic therapy(PDT)has been drawing more and more attention in the antibacterial *** photosensitizers(PSs)tend to aggregate in aqueous media,which reduces the generation of reactive oxygen species(ROS)and seriously affects the photodynamic *** efforts have been made to prevent aggregation of traditional *** contrast,aggregation-induced emission PSs(AIE-PSs)take advantage of aggregation to boost ROS generation and fluorescence ***,the efficacies of the reported antibacterial AIE-PSs are ***,we report a new class of highly effective antibacterial AIE-PSs based on nitrobenzoic acid ***,a negatively charged AIE-PS,can not only selectively kill spherical bacteria(Staphylococcus aureus(***))rather than rod-shaped bacteria(Escherichia coli(***)),but also be easily extended to several AIE-PSs(TTVBP1–3)with positive charges and broad-spectrum antibacterial *** demonstrate that TTVBP2 can kill3.0 log_(10)of *** at very low concentration(125 nmol L^(-1)),TTVBP3 can kill 4.7 log_(10)of Staphylococcus epidermidis(***)at a concentration of 1μmol L^(-1)and 3.8 log_(10)of *** at 5μmol L^(-1),thus enabling them among the most effective antibacterial AIE-PSs reported so ***,these AIE-PSs exhibit excellent wash-free imaging ability for bacteria by simple mixing with *** thus envision that TTVBA,a nitrobenzoic acid-based extendable AIE-PS,provides a new route for the design of AIE-PSs in antibacterial treatment.

关键词： photodynamic antibacterial therapy photosensitizer aggregation-induced emission reactive oxygen species imaging

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Ca_(2)Nb_(2)O_(7)as a Novel Open-framework Anode Material for Potassium-ion Batteries

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Chinese Journal of Structural Chemistry 2021年第2期40卷 233-238,147页

作者： YANG Xin WANG Zheng-Dong FU Yu-Ru LIU Qin XIAO Gao CAS Key Laboratory of Design and Assembly of Functional Nanostructures and Fujian Key Laboratory of NanomaterialsFujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhou 350002China University of Chinese Academy of Sciences Beijing100039China Department of Environmental Science and Engineering College of Environment and ResourcesFuzhou UniversityFuzhou 350108China State Key Laboratory of Photocatalysis on Energy and Environment Fuzhou UniversityFuzhou 350116China

Potassium-ion batteries(KIBs)are a promising alternative to Lithium-based energy storage systems owning to the low cost and rich abundance of potassium resources,but are facing challenges in designing low-cost hosts that can reversibly accommodate large-size K^(+)with fast diffusion ***,we report a novel 3D inorganic open framework of Ca_(2)Nb_(2)O_(7)(CNO)as an anode for *** open framework structure affords interstitial vacancies available for storing K^(+)and allows a facile diffusion of K^(+),thus resulting in excellent structural stability and fast reaction *** CNO electrode delivers a reversible specific capacity of 65.3 and 52.2 mAh/g at 5 and 10 mA/g,***,CNO exhibits excellent long-term cyclability with 92.53%capacity retention over 700 cycles at 10 mA/*** will trigger more investigations into open-framework-based materials for stable and fast KIBs.

关键词： potassium-ion batteries inorganic-open-framework long lifespan kinetics

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In-Situ Texturing Hollow Carbon Host Anchored with Fe Single Atoms Accelerating Solid-Phase Redox for Li-Se Batteries

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SSRN 2024年

作者： Xia, Qi Zou, Yan Yan, Ke Bao, Liangxue Chen, Huixin Yue, Hongjun CAS Key Laboratory of Design and Assembly of Functional Nanostructures Fujian Provincial Key Laboratory of Nanomaterials Fujian Institute of Research The Structure of Matter Chinese Academy of Sciences Fujian Fuzhou350002 China Xiamen Key Laboratory of Rare Earth Photoelectric Functional Materials Xiamen Institute of Rare Earth Materials Haixi Institutes Chinese Academy of Sciences Fujian Xiamen361021 China College of Chemistry Fuzhou University Fujian Fuzhou350108 China

Se-based cathodes have caught tremendous attention owing to their comparable volumetric capacity and better electronic conductivity to S cathodes. However, its low utilization ratio and sluggish redox kinetics due to the high reaction barrier of solid-phase transformation from Se to Li2Se limit its practical application. Herein, an in-situ texturing hollow carbon host by gas-solid interface reaction anchored with Fe single-atomic catalyst (HCS-Fe) is designed and prepared for advanced Li-Se batteries. The HCS-Fe host presents high pore volume of 1.49 cm3 g−1, Fe single atom content of 1.53 wt.%, and its specific structure protects single-atomic catalyst from the destructive reaction environment, thus balancing catalytic activity and durability. After Se loading by reduction of H2SeO3, the homogenous HCS-Fe/Se cathode delivers a superior rate capacity of 431.3 mA h g−1 at 4 C, and great discharge capacity of 301.8 mA h g−1 after 1000 cycles at 10 C, with high Li-ion diffusion coefficient and capacitance-contributed ratio. The DRT analysis verifies solid-phase transformation mechanism of HCS-Fe/Se cathode and DFT calculations confirm the adsorption and bidirectionally catalysis effect of Fe single-atomic catalyst. This work provides a new strategy to prepare high-efficient Se cathode associated with non-noble metal single atoms for high-performance Li-Se batteries. © 2024, The Authors. All rights reserved.

关键词： Cathodes

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Polarized upconversion luminescence from a single LiLuF_(4):Yb^(3+)/Er^(3+) microcrystal for orientation tracking

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Science China Materials 2022年第1期65卷 220-228页

作者： Shouquan Wei Xiaoying Shang Ping Huang Wei Zheng En Ma Jin Xu Meiran Zhang Datao Tu Xueyuan Chen CAS Key Laboratory of Design and Assembly of Functional Nanostructures Fujian Key Laboratory of NanomaterialsState Key Laboratory of Structural ChemistryFujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhou 350002China College of Chemistry Fuzhou UniversityFuzhou 350116China Xiamen Institute of Rare-Earth Materials Haixi InstitutesChinese Academy of SciencesXiamen 361021China Fujian Science&Technology Innovation Laboratory for Optoelectronic Information of China Fuzhou 350108China

Polarized upconversion luminescence(UCL)of lanthanide-doped micro/nano-crystals has shown great promise in single-particle tracking and super-resolution ***,because of the spectral line broadening and multiple sites of lanthanide in upconversion particles(UCPs),the crystal-field(CF)polarization components of UCL are usually ***,we report the linearly polarized UCL in LiLuF_(4):Yb^(3+)/Er^(3+) single microcrystals with resolvable CF transition lines and a polarization degree up to *** CF levels and CF transition lines of Er^(3+),as well as their emission polarization anisotropy,are unraveled for the first time through low-temperature and high-resolution photoluminescence(PL)and UCL *** taking advantage of the well-resolved and highly-polarized CF transition lines of Er^(3+),we demonstrate the application of LiLuF_(4):Yb^(3+)/Er^(3+) single microcrystals as anisotropic UCL probes for orientation *** findings provide fundamental insights into the polarization anisotropy of UCL in lanthanide-doped single particles,thus laying a foundation for the future design of anisotropic luminescent probes towards versatile applications.

关键词： LiLuF_(4) upconversion luminescence single particle polarization anisotropy crystal-field level

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D^(6h)Symmetric Radical Donor-Acceptor Nanographene Modulated Interfacial Carrier Transfer for High-Performance Perovskite Solar Cells

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CCS Chemistry 2023年第9期5卷 2159-2170页

作者： Can Wang Yifeng Gao Zhen-Lin Qiu Ping-Ping Sun Naoyuki Shibayama Zilong Zhang Qiu Xiong Fangbin Ren Shui-Yang Lien Lusheng Liang Jiaoxia Zhang Yuan-Zhi Tan Peng Gao CAS Key Laboratory of Design and Assembly of Functional Nanostructures Fujian Provincial Key Laboratory of NanomaterialsFujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhouFujian 350002 Laboratory for Advanced Functional Materials Xiamen Institute of Rare Earth MaterialsHaixi InstituteChinese Academy of SciencesXiamen 361021 University of Chinese Academy of Sciences Beijing 100049 School of Materials Science and Engineering Jiangsu University of Science and TechnologyZhenjiang 212003 Collaborative Innovation Center of Chemistry for Energy Materials State Key Laboratory for Physical Chemistry of Solid SurfacesEngineering Research Center for Nano-Preparation Technology of Fujian ProvinceDepartment of ChemistryCollege of Chemistry and Chemical EngineeringXiamen UniversityXiamen 361005 Department of Chemistry School of ScienceHainan UniversityHaikou 570228 Faculty of Biomedical Engineering Graduate School of EngineeringToin University of YokohamaYokohamaKanagawa 225-8503 Xiamen University of Technology Xiamen 361024

Imbalanced charge-carrier extraction remains an issue aggravating interfacial charge accumulation and *** hopping transport channels could accelerate the extraction of ***,we demonstrated an effective“bridging interface”strategy between the perovskite/2,2′,7,7′-tetrakis(N,N-di-pmethoxyphenylamine)-9,9′-spirobifluorene(spiro-OMeTAD)that modulates interfacial charge transfer and improves hole mobility using radical-containing donor-acceptor nanographenes(D-A NGs)possessing electron-deficient perchlorinated NGs and electron-rich aniline *** fully delocalized backbone of nanographene formed a conjugated bridge for intermolecular charge transfer and generated stable radical cations,verified by electron spin *** andπ-πstacking orientation of D-A NGs also provided advantageous hopping transport *** favorable charge transfer within D-A NGs,systematic explorations indicated a strong interface coupling and noticeable charge transfer across the D-A NGs and perovskite interface,where electrons would flow from D-A NGs to perovskite,and holes would flow from perovskite to D-A ***,the hole mobility of spiro-OMeTAD was also enhanced because the D-A NGs would diffuse into the spiro-OMeTAD *** a result,planar n-i-p perovskite solar cellsmodified byD-ANG-OMe/D-ANG-tBudeliveredchampion power conversion efficiencies(PCEs)of 23.25%and 23.51%,respectively.

关键词： perovskite solar cell radicals donor-acceptor nanographene hole mobility interfacial charge transfer

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A Perimidin Derivative with Multiple Redox Centers as an Anode for Lithium-ion Batteries

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Chinese Journal of Structural Chemistry 2020年第2期39卷 263-268,185页

作者： FU Yu-Ru LIU Qin SUN Chuan-Fu CAS Key Laboratory of Design and Assembly of Functional Nanostructures and Fujian Key Laboratory of NanomaterialsFujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhou 350002China University of Chinese Academy of Sciences Beijing 100039China

Organic molecules are attractive electrode materials for rechargeable batteries owing to their sustainability, low cost, and light weight. In this work, we report a new organic anode, a perimidin derivative 1,3,5-tri(1 H-perimidin-2-yl)-benzene(TPB), for lithium-ion batteries. The TPB structure contains multiple redox centers including π-conjugated benzene ring, C=N, and-NH groups and delivers a high reversible specific capacity of 300 mAh/g at 50 mA/g under a six-electron redox reaction. Moreover, TPB exhibits excellent rate capability and long-term cyclability with 98.1% capacity retention over 1500 cycles at 1000 mA/g. The results may open new opportunities for the development of low-cost and long-lifespan lithium-ion batteries.

关键词： lithium-ion batteries organic electrode multiple redox centers long lifespan

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Bio-inspired Materials for Photocatalytic Hydrogen Production

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Chinese Journal of Structural Chemistry 2020年第12期39卷 2123-2130,2054页

作者： JIANG Xia CHEN Yan-Xin LU Can-Zhong CAS Key Laboratory of Design and Assembly of Functional Nanostructures and Fujian Provincial Key Laboratory of NanomaterialsFujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhou 350002China Xiamen Key Laboratory of Rare Earth Photoelectric Functional Materials Xiamen Institute of Rare-earth MaterialsHaixi InstitutesChinese Academy of SciencesXiamen 361021China

After millions of years of evolution,species in nature have structures and complex elements that are difficult to synthesize ***,these fine structures and compositions are often beneficial to improve the photocatalytic ***,various materials with special morphology,pore structure and element composition derived from biomass have emerged and are widely *** mini review focuses on the preparation of bio-inspired materials and their current status in photocatalytic hydrogen ***,this will bring new perspectives to researchers and make them learn more about the advantages of"learning from nature"and pay more attention to the green design of material structures.

关键词： biomass bio-inspired materials photocatalytic hydrogen production

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