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A flexible solid polymer electrolyte enabled with lithiated zeolite for high performance lithium battery

Nano Research 2023年第7期16卷 9443-9452页

作者： Zhiyu Ding Qiming Tang Qi Zhang Penghui Yao Xingjun Liu Junwei Wu Shenzhen Key Laboratory of Advanced Materials Department of Materials Science and EngineeringHarbin Institute of Technology(Shenzhen)Shenzhen 518055China Maryland Energy Innovation Institute University of MarylandCollege ParkMD 20742USA Department of Chemical and Metallurgical Engineering Aalto UniversityKemistintie 1Aalto FI-00076Finland

Solid-state lithium batteries using composite polymer electrolytes(CPEs)have attracted much attention owing to their higher safety compared to liquid electrolytes and flexibility compared to ceramic electrolytes.However,their unsatisfactory lithium-ion conductivity still limits their development.Herein,a high ion conductive CPE with multiple continuous lithium pathways is designed.This new electrolyte consists of poly(vinylidene fluorideco-hexafluoropropylene)(PVDF-HFP)and lithiated X type zeolite(Li-X),which possesses a high ionic conductivity(1.98×10^(-4)S/cm),high lithium transference number(t_(Li^(+))=0.55),wide electrochemical window(4.7 V),and excellent stability against the lithium anode.Density functional theory(DFT)calculation confirms that the Lewis acid sites in zeolite can graft with N,N-dimethylformamide(DMF)and PVDF-HFP chains,resulting in decreased crystallinity of polymer and providing rapid Li+transmission channels.When used in a full cell,the solid Li|Li-X-3%|LiFePO_(4) cell displays excellent cycling stability and rate performance at room temperature and 60℃.Furthermore,pouch cells with the Li-X-3%electrolyte exhibit brilliant safety under extreme conditions,such as folding and cutting.Thus,this proposed zeolite-PVDF-HFP CPE represents a promising potential in the application of making a safer,higher performing,and flexible solid-state lithium battery.

关键词： solid-state lithium batteries composite polymer electrolytes zeolite poly(vinylidene fluorideco-hexafluoropropylene)(PVDF-HFP) flexible

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Melt polymerization synthesis of a class of robust self-shaped olefin-linked COF foams as high-efficiency separators

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Science China Chemistry 2022年第6期65卷 1173-1184页

作者： penghui Zhang Zhifang Wang Yi Yang Sa Wang Ting Wang Jinjin Liu Peng Cheng yao Chen Zhenjie Zhang State Key Laboratory of Medicinal Chemical biology College of ChemistryNankai UniversityTianjin300071China Key Laboratory of Advanced Energy Materials Chemistry Ministry of EducationNankai UniversityTianjin300071China College of Pharmacy Nankai UniversityTianjin300071China Renewable Energy Conversion and Storage Center Nankai UniversityTianjin300071China

The practical applications of crystalline porous materials toward industrial separations require shaping them into robust monoliths(e.g., foams). The current methods are often complicated, environmentally unfriendly, and unscalable, significantly hampering their practical application. Herein, we report a scalable, facile “one-step thermomolding” method to fabricate a class of hierarchically olefin-linked covalent organic framework(COF) foams via melt polymerization. The obtained pure COF foams possess higher crystallinity and porosity than literature, good moldability, and processability, greatly benefiting their practical applications(e.g., efficient oil-water separation with 99% removal efficiency and >100 cycle reusability). Moreover, a COF exhibiting the smallest(0.58 nm) eclipsed stacking pore among all 2-dimensional COFs with neutral skeletons is first fabricated via this protocol, demonstrating good C2 H2 purification performance and recyclability, surpassing the current benchmark materials. We believe that this facile fabrication strategy can promote access to a broad diversity of new COF foams and enlighten further avenues for green routes to large-scale synthesis and usage of COFs.

关键词： covalent organic framework separation foam melt polymerization

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Industry-compatible covalent organic frameworks for green chemical engineering

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Science China Chemistry 2022年第11期65卷 2144-2162页

作者： Zhifang Wang Qianqian Zhu Jiaxi Wang Fazheng Jin penghui Zhang Dong Yan Peng Cheng yao Chen Zhenjie Zhang State Key Laboratory of Medicinal Chemical Biology College of ChemistryNankai UniversityTianjin 300071China Key Laboratory of Advanced Energy Materials Chemistry Ministry of EducationNankai UniversityTianjin 300071China Renewable Energy Conversion and Storage Center Nankai UniversityTianjin 300071China Frontiers Science Center for New Organic Matter Nankai UniversityTianjin 300071China College of Pharmacy Nankai UniversityTianjin 300071China

In order to move towards sustainable development, the discovery of energy-efficient and environmentally friendly materials has become increasingly imperative. Covalent organic frameworks(COFs) as emerging designable crystalline porous materials have captured increasing attention for a wide array of clean-energy and environmental applications, attributed to their attractive advantages of low density, high surface area, adjustable and periodic pores, and functional skeletons. This review attempts to highlight the key advancements made in the green synthesis of COFs, processing of COFs, energy and environment-related applications, including gas storage, water treatment, the separation of gas mixture and organic molecules, catalysis, supercapacitors, fuel cell, and rechargeable batteries. Finally, a perspective regarding the remaining challenges and future directions on the synthesis and promising application for green chemical engineering of COFs has also been presented based on current achievements.

关键词： covalent organic frameworks green chemical engineering clean energy environmental protection

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Quantum verification of NP problems with single photons and linear optics

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Light(Science & Applications) 2021年第9期10卷 1750-1760页

作者： Aonan Zhang Hao Zhan Junjie Liao Kaimin Zheng Tao Jiang Minghao Mi Penghui Yao Lijian Zhang National Laboratory of Solid State Microstructures Key Laboratory of Intelligent Optical Sensing and Manipulation(Ministry of Education)and College of Engineering and Applied SciencesNanjing University210093NanjingChina Collaborative Innovation Center of Advanced Microstructures Nanjing University210093NanjingChina State Key Laboratory for Novel Software Technology Nanjing University210093NanjingChina

Quantum computing is seeking to realize hardware-optimized algorithms for application-related computational tasks.NP(nondeterministic-polynomial-time)is a complexity class containing many important but intractable problems like the satisfiability of potentially conflict constraints(SAT).According to the well-founded exponential time hypothesis,verifying an SAT instance of size n requires generally the complete solution in an O(n)-bit proof.In contrast,quantum verification algorithms,which encode the solution into quantum bits rather than classical bit strings,can perform the verification task with quadratically reduced information about the solution in O~(Õ−−√n)qubits.Here we realize the quantum verification machine of SAT with single photons and linear optics.By using tunable optical setups,we efficiently verify satisfiable and unsatisfiable SAT instances and achieve a clear completeness-soundness gap even in the presence of experimental imperfections.The protocol requires only unentangled photons,linear operations on multiple modes and at most two-photon joint measurements.These features make the protocol suitable for photonic realization and scalable to large problem sizes with the advances in high-dimensional quantum information manipulation and large scale linear-optical systems.Our results open an essentially new route toward quantum advantages and extend the computational capability of optical quantum computing.

关键词： quantum optics verify

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A pyrazine based metal-organic framework for selective removal of copper from strongly acidic solutions

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Frontiers of Environmental Science & Engineering 2023年第3期17卷 75-86页

作者： Jiachuang Shao penghui Shao Mingming Peng Min Li Ziwei yao Xiuqin Xiong Caiting Qiu Yufan Zheng Liming Yang Xubiao Luo Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle National-Local Joint Engineering Research Center of Heavy Metals Pollutants Control and Resource utilizationNanchang Hangkong UniversityNanchang 330063China Department of Chemical Engineering Chongqing University of Science and TechnologyChongqing 401331China

The selective capture of copper from strongly acidic solutions is of vital importance from the perspective of sustainable development and environmental protection.Metal organic frameworks(MOFs)have attracted the interest of many scholars for adsorption due to their fascinating physicochemical characteristics,including adjustable structure,strong stability and porosity.Herein,pz-UiO-66 containing a pyrazine structure is successfully synthesized for the efficient separation of copper from strongly acidic conditions.Selective copper removal at low pH values is accomplished by using this material that is not available in previously reported metal–organic frameworks.Furthermore,the material exhibits excellent adsorption capacity,with a theoretical maximum copper uptake of 247 mg/g.As proven by XPS and FT-IR analysis,the coordination of pyrazine nitrogen atoms with copper ions is the dominant adsorption mechanism of copper by pz-UiO-66.This work provides an opportunity for efficient and selective copper removal under strongly acidic conditions,and promises extensive application prospects for the removal of copper in the treatment for acid metallurgical wastewater.

关键词： Pyrazine Metal-organic frameworks Copper removal Strong acidity High selectivity

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地聚物橡胶混凝土的力学、抗冲击性能及强度机理分析

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硅酸盐通报 2023年第1期42卷 239-247页

作者：杨鹏辉姚远河南交投商罗高速公路有限公司郑州450000

为探究橡胶再生集料在地聚物混凝土中的增韧作用,采用不同比例的橡胶再生集料(粒径为0.15~0.3 mm和1~4 mm)代替地聚物混凝土中的普通集料。首先,采用工业废渣中粒化高炉矿渣粉为原料,水玻璃溶液和NaOH为激发剂制备地聚物胶凝材料,并与... 详细信息

为探究橡胶再生集料在地聚物混凝土中的增韧作用,采用不同比例的橡胶再生集料(粒径为0.15~0.3 mm和1~4 mm)代替地聚物混凝土中的普通集料。首先,采用工业废渣中粒化高炉矿渣粉为原料,水玻璃溶液和NaOH为激发剂制备地聚物胶凝材料,并与普通集料、橡胶再生集料混合制备地聚物橡胶混凝土;然后对地聚物橡胶混凝土的力学性能、抗冲击性能和强度机理进行探究。结果表明:添加适量比例的橡胶再生集料可提高地聚物混凝土的抗压强度,增幅为5%左右,这与橡胶再生集料表面在NaOH碱环境中的氧化和降解作用有关;但地聚物橡胶混凝土在劈裂荷载和弯曲荷载下易断裂,劈裂抗拉强度和抗折强度降低20%~30%,这是地聚物橡胶混凝土的典型特点。通过落锤冲击试验和弯拉冲击试验可知,橡胶再生集料能大幅提高地聚物混凝土的抗冲击性能,最高增幅超过200%。这是由于橡胶再生集料具有的柔性和弹性特征吸收了部分冲击能量,同时延缓了冲击荷载下混凝土初始开裂到失效破坏过程,减少了裂缝开裂应力集中,提高了地聚物混凝土的延性。在地聚物碱性条件下,橡胶颗粒表面发生氧化和降解作用,表面变得粗糙,与地聚物基体结合紧密;橡胶表面在NaOH作用下,产生羟基、羧基等亲水基团,有利于水化产物在橡胶再生集料表面附着。

关键词：地聚物混凝土橡胶再生集料力学性能抗冲击性能固体废物

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密封胶在高速公路沥青路面裂缝修补中的应用研究

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粘接 2023年第12期50卷 17-20页

作者：杨鹏辉姚远河南交投商罗高速公路有限公司河南郑州450046

为解决高速公路沥青路面裂缝修补问题,通过现场调查确定采用密封胶开槽灌缝技术进行裂缝修补,并对其修补效果进了综合评价与分析,研究结果表明,在实施密封胶灌缝修补后,沥青路面的损坏程度、行驶质量、结构强度等评价指标均达到优秀标准... 详细信息

为解决高速公路沥青路面裂缝修补问题,通过现场调查确定采用密封胶开槽灌缝技术进行裂缝修补,并对其修补效果进了综合评价与分析,研究结果表明,在实施密封胶灌缝修补后,沥青路面的损坏程度、行驶质量、结构强度等评价指标均达到优秀标准,密封胶灌缝修补效果良好,有利于提升沥青路面的使用效率及寿命。密封胶灌缝时,开槽应居于裂缝中间,且缝侧两边应均匀整齐,裂缝修补适宜选于秋冬季进行,桥头搭板、路基换填等连接处的裂缝,应先处理路基后再采取密封胶灌缝修补,以保证灌缝修补质量。

关键词：高速公路沥青路面裂缝修补密封胶效果评价

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Serine metabolism orchestrates macrophage polarization by regulating the IGF1–p38 axis

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Cellular & Molecular Immunology 2022年第11期19卷 1263-1278页

作者： Xiao Shan penghui Hu Lina Ni Long Shen Yanan Zhang Zemin Ji Yan Cui Meihua Guo Haoan Wang Liyuan Ran Kun Yang Ting Wang Lei Wang Bin Chen Zhi yao Vingjie Wu Qiujing Yu Tianjin Institute of Immunology Key Laboratory of Immune Microenvironment and Disease of the Ministry of EducationThe Province and Ministry Co-sponsored Collaborative Innovation Center for Medical EpigeneticsTianjin Key Laboratory of Inflammation BiologyDepartment of ImmunologySchool of Basic Medical SciencesTianjin Medical University Division of Infectious Disease Second Hospital of Tianjin Medical UniversityTianjin300070China Institute for Genome Engineered Animal Models of Human Diseases National Center of Genetically Engineered Animal Models for International ResearchDalian Medical UniversityDalian116044LiaoningChina Shandong Provincial Hospital School of Laboratory Animal and Shandong Laboratory Animal CenterScience and Technology Innovation CenterShandong First Medical University and Shandong Academy of Medical SciencesJinan250021ShandongChina The Province and Ministry Co-sponsored Collaborative Innovation Center for Medical Epigenetics Department of Pharmacology and Tianjin Key Laboratory of Inflammation BiologySchool of Basic Medical SciencesTianjin Medical UniversityTianjin300070China Tianjin Institute of Immunology Key Laboratory of Immune Microenvironment and Disease of the Ministry of EducationDepartment of ImmunologySchool of Basic Medical SciencesTianjin Medical UniversityTianjinChina Department of Molecular Pathobiology New York University College of DentistryNew YorkNY10010USA

Serine metabolism is reportedly involved in immune cell functions, but whether and how serine metabolism regulates macrophage polarization remain largely unknown. Here, we show that suppressing serine metabolism, either by inhibiting the activity of the key enzyme phosphoglycerate dehydrogenase in the serine biosynthesis pathway or by exogenous serine and glycine restriction, robustly enhances the polarization of interferon-γ-activated macrophages (M(IFN-γ)) but suppresses that of interleukin-4-activated macrophages (M(IL-4)) both in vitro and in vivo. Mechanistically, serine metabolism deficiency increases the expression of IGF1 by reducing the promoter abundance of S-adenosyl methionine-dependent histone H3 lysine 27 trimethylation. IGF1 then activates the p38-dependent JAK–STAT1 axis to promote M(IFN-γ) polarization and suppress STAT6-mediated M(IL-4) activation. This study reveals a new mechanism by which serine metabolism orchestrates macrophage polarization and suggests the manipulation of serine metabolism as a therapeutic strategy for macrophage-mediated immune diseases.

关键词： Serine metabolism PHGDH Macrophage polarization SAM IGF1 p38

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基于模糊控制的隧道有害气体治理技术研究

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隧道建设（中英文） 2022年第S01期42卷 120-127页

作者：李科李鹏辉蔡爽程亮姚雪峰招商局重庆交通科研设计院有限公司重庆400067 重庆交通大学土木工程学院重庆400074 重庆市公路事务中心重庆401147

针对隧道通风系统控制手段单一、控制滞后、效率低且效果差等问题,改进一种基于模糊理论的多种有害气体综合治理新方法,并采用模糊PID控制技术构建一种综合治理系统。该系统利用采样模块实时监测数据,将信号上传至分析模块进行全局把控... 详细信息

针对隧道通风系统控制手段单一、控制滞后、效率低且效果差等问题,改进一种基于模糊理论的多种有害气体综合治理新方法,并采用模糊PID控制技术构建一种综合治理系统。该系统利用采样模块实时监测数据,将信号上传至分析模块进行全局把控,通过模糊控制模块在线校正参数,不断循环控制变频器来提高被控对象的运行频率,调节风量与吸收液喷雾量,最后由治理模块实施通风稀释和喷雾净化,实现对多种有害气体进行治理。该系统应用于青海省某穿煤隧道,结果表明:该系统能够快速降低放炮后监测断面处有害气体浓度,其中掌子面处瓦斯、硫化氢的平均浓度值分别降低了17.3%、27.3%,衬砌前端处二者的平均浓度降低了12.2%、36.7%,具有较高的准确性;放炮后浓度降至规范限值的时间也由平均20 min减少至10 min左右,缩短了1~2倍,能有效保障隧道施工安全,提高隧道施工效率。

关键词：隧道通风模糊理论模糊PID控制技术有害气体治理

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Thermally rearranged covalent organic framework with flame-retardancy as a high safety Li-ion solid electrolyte

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eScience 2022年第3期2卷 311-318页

作者： Zhifang Wang Yushu Zhang penghui Zhang Dong Yan Jinjin Liu yao Chen Qi Liu Peng Cheng Michael JZaworotko Zhenjie Zhang Renewable Energy Conversion and Storage Center Frontiers Science Center for New Organic MatterCollege of ChemistryNankai UniversityTianjin300071China Key Laboratory of Advanced Energy Materials Chemistry(Ministry of Education) Nankai UniversityTianjin300071China College of Pharmacy Nankai UniversityTianjin300071China Department of Chemical Sciences and Bernal Institute University of LimerickLimerickV94 T9PXIreland Department of Physics City University of Hong KongHong Kong999077China

Solid polymer electrolytes have demonstrated high promise to solve the safety problems caused by conventional liquid electrolytes in lithium ion batteries.However,the inherent flammability of most polymer electrolyte materials remains unresolved,hence hindering their further industrial application.Addressing this challenge,we designed and constructed a thermal-responsive imide-linked covalent organic framework(COF)bearing ortho-positioned hydroxy groups as precursors,which can conduct a thermal rearrangement to transform into a highly crystalline and robust benzoxazole-linked COF upon heating.Benefiting from the release of carbon dioxide through thermal rearrangement reaction,this COF platform exhibited excellent flame retardant properties.By contrast,classic COFs(e.g.,boronate ester,imine,olefin,imide linked)were all flammable.Moreover,incorpo-rating polyethylene glycol and Li salt into the COF channels can produce solid polymer electrolytes with outstanding flame retardancy,high ionic conductivity(6.42×10^(-4) S cm^(-1))and a high lithium-ion transference number of 0.95.This thermal rearrangement strategy not only opens a new route for the fabrication of ultrastable COFs,but also provides promising perspectives to designing flame-retardant materials for energy-related applications.

关键词： Covalent organic frameworks Thermal rearrangement Flame retardancy Solid polymer electrolytes Lithium-ion batteries

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