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General construction of lithiophilic 3D skeleton for dendrite-free lithium metal anode via a versatile mof-derived route

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Science China Materials 2022年第2期65卷 337-348页

作者： Liyan Zeng Ting Zhou Xijun Xu Fangkun Li Jiadong Shen Dechao Zhang Jun Liu Min Zhu School of Materials Science and Engineering and Guangdong Provincial Key Laboratory of Advanced Energy Storage Materials South China University of TechnologyGuangzhou 510641China

The pursuit of high-mileage models results in the recurrence of lithium metal batteries(LMBs)to researchers’***,the lithium(Li)metal anode for LMBs undergoes the uncontrollable formation of Li dendrites and infinite volume change during cycling,impeding its practical *** overcome these challenges,we developed a metal-organic framework(mof)-derived pathway to construct lithiophilic three-dimensional(3D)skeleton using different substrates(e.g.,carbon cloth(CC)and Cu mesh)for dendrite-free lithium metal *** a typical example,the mof-derived ZnO/nitrogen-doped carbon(NC)nanosheet-modified 3D CC was well-constructed as a lithiophilic hierarchical host(CC@ZnO/NC@Li)for molten Li *** from the lithiophilic N-functional groups and LiZn alloy,the synthesized CC@ZnO/NC@Li composite anode promoted the uniform distribution of Li,resulting in a dendrite-free ***,the 3D conductive carbon skeleton enhanced the reaction kinetics and buffered the volume change of the *** CC@ZnO/NC@Li composite anode presented a prolonged lifespan of over 1000 cycles at 5 mA cm^(−2) with a low overpotential of 19 *** with a LiFePO_(4) cathode,the CC@ZnO/NC@Li composite anode also exhibited superior electrochemical properties in the full-cell *** versatile strategy may open up the channel of designing multi-functional lithiophilic 3D hosts for the Li metal anode.

关键词： dendrite-free lithium anode 3D lithiophilic host mof-derived ZnO/NC nanosheets lithium metal batteries

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Construction of multi-structures based on Cu NWs-supported mof-derived Co oxides for asymmetric pseudocapacitors

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Journal of Materials Science & Technology 2021年第6期65卷 182-189页

作者： Ruimei Yuan Hejun Li Xuemin Yin Peipei Wang Jinhua Lu Leilei Zhang State Key Laboratory of Solidification Processing Carbon/Carbon Composites Research CenterNorthwestern Polytechnical UniversityXi'an 710072China

Cu@mof core-shell nanowires are synthesized by introducing oxidizable and CTAB-modified metal nanowires as self-engaged templates and supporting mofs for a one-dimension *** following thermal process is controlled to obtain several one-dimension structure s ofCuCo-mixed materials,such as nanorods,single-shell and double-shell *** hollow structure for electrode materials enlarges the surface area,provides buffer space for electrolyte to accelerate the ion/charge transfers and for the structure to reduce injuries of volume expansion during *** with some other merits,such as adequate oxidation of the mofs,small crystal grains of the material,and well-mixed Cu/Co oxides,the double-shell Cu@mof nanowires(CuCo-DS5)applied for pseudocapacitors deliver advanced electrochemical performance with a specific capacitance of 563.8 F g^(-1)at 1 A g^(-1)as well as an outstanding cycling stability with a 92%retention after 3000 cycles at 5 A g^(-1).Meanwhile,an asymmetric pseudocapacitor constructed with the CuCo-DS5 and active carbon(AC)shows a high specific capacitance and energy density.

关键词： Modified nanowires mof-derived Hollow Core-shell Double-shell Energy storage

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Advances in metal-organic framework-derived single-atom catalysts for biomedicine

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Nano Materials Science 2024年第4期6卷 396-412页

作者： Li Qiu Yingxi Lin Jun Song Chen Hong Luo Rui Wu Department of Ultrasound West China Second University Hospital Sichuan University Key Laboratory of Obstetric and Gynecologic and Pediatric Diseases and Birth Defects of Ministry of Education Sichuan University School of Materials and Energy University of Electronic Science and Technology of China Interdisciplinary Materials Research Center Institute for Advanced Study Chengdu University

As a alternative for natural enzymes, nanozymes has shown enzyme-like activity and selectivity in the field of various kinds of biomedical application, which has attracted considerable research interest. Recently, single-atom catalysts(SACs) have been extensively studied due to their similar active centers, coordination environment and better stability to natural enzymes. Metal-organic frameworks(mofs) have been demonstrated as highly promising precursors for the synthesis of various types of SACs. mof-derived SACs can not only significantly enhance the catalytic activity, but also improve the selectivity of nanozymes due to tunable coordination environment and structure, thereby receiving widespread attention in biomedicine. This review provided an overview of the preparation strategies for mof-derived SACs, and then detailed the latest research progress of the SACs in the biomedical field for cancer, antibacterial, antioxidation and biosensors. Finally, the challenges and potential future opportunities of mof-derived SACs in biomedical applications are proposed.

关键词： Biomedicine mof-derived SAC nanozymes Catalytic mechanisms

Metal-organic frameworks and their derivatives for Li-air batteries

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Chinese Chemical Letters 2020年第3期31卷 635-642页

作者： Yu Dong Siwu Li Shanshan Hong Lu Wang Bo Wang Beijing Key Laboratory of Photoelectronic/Electrophotonic Conversion Materials Key Laboratory of Cluster ScienceMinistry of EducationSchool of Chemistry and Chemical EngineeringBeijing Institute of TechnologyBeijing 100081China

Metal-organic frameworks(mofs)are a class of outstanding materials in Li-air batteries because of their high surface areas,tailorable pore sizes and diverse catalytic ***,mof-based batteries are facing challenges such as poor electronic conductivity and inferior long-cycle stability that limit their further *** review first summarizes the progress of pristine mofs and mof-derived materials in Li-air batteries in the past 5 years,then provides a perspective for subsequent development of mofs and their derivatives in this emerging field.

关键词： Metal-organic frameworks mof-derived materials Li-air batteries Li-O2 batteries Li-CO2 batteries

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Cu/Co mixed hierarchical tubular heterostructures for alkaline supercapacitors

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Journal of Materiomics 2021年第3期7卷 640-647页

作者： Ruimei Yuan Hejun Li Xuemin Yin Peipei Wang Jinhua Lu Leilei Zhang Carbon/Carbon Composites Research Center Northwestern Polytechnical UniversityXi’an710072China

The hierarchical hollow structures of electrode materials s of supercapacitors is effective for the large specific surface area and fast ions and charge *** nanowires as self-engaged templates provide sites and paths for the nucleation and growth of the ***,Cu atoms can disperse into metal organic frameworks(mofs)to form Cu-Co mixed oxides and construct *** this case,Cu nanowires are used as a template and an activated part to improve the internal electronic *** electrochemical performance can be improved due to these ***,Cu nanowires and mofs are combined via a mild and efficient approach to fabricate Cu-Co-O/CuO electrode *** electrode exhibits excellent electrochemical performance with a specific capacitance of 834.1 F g^(-1) at 1 A g^(-1).The assembled asymmetric supercapacitor(ASC)shows an ultra-high energy density of 40.7 W h kg^(-1) at a power density of 915 W kg^(-1) and a good capacitance retention after 8000 cycles in a 2 M KOH aqueous *** results otained in this work indicate a strategy of the combination of reactive metals with metal organic frameworks used as electrode materials for electrochemical supercapacitors.

关键词： Oxidizable nanowires mof-derived Hierarchical Hollow Energy storage