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Advances of high-performance LiNi_(1-x-y)Co_(x)M_(y)O_(2) cathode materials and their precursor particles via co-precipitation process

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Particuology 2024年第3期86卷 67-85页

作者： Wenbiao Liang Yin Zhao liyi shi Zhuyi Wang Yi Wang Meihong Zhang Shuai Yuan School of Materials Science and Engineering Shanghai UniversityShanghai200444China Research Center of Nanoscience and Nanotechnology Shanghai UniversityShanghai200444China Emerging Industries Institute Shanghai UniversityJiaxingZhejiang314006China

Layered LiNi_(1-x-y)Co_(x)M_(y)O_(2)(M=Mn or Al)is a promising cathode material for lithium-ion batteries due to its high specific capacity and acceptable manufacturing ***,the polycrystalline LiNi_(1-x-y)Co_(x)M_(y)O_(2) cathode material suffers from disordered orientation of primary particles and poor geometric symmetry of secondary particles,which severely hampers the migration of Lit ***,the resulting anisotropy accelerates the disintegration of the secondary particle structure,significantly affecting the electrochemical performance of the polycrystalline *** spite of less grain boundary,the single-crystal LiNi_(1-x-y)Co_(x)M_(y)O_(2) cathodes still suffer from severe microcracks generated by repeated planar gliding during cycling,which poses a great challenge to the cycling stability of single-crystal ***'s worth noting that the microstructure of the cathode material is mainly inherited from its ***,it is necessary to deeply understand the influence of the microstructure of Ni_(1-x-y)Co_(x)M_(y)(OH)2 on the electrochemical properties of LiNi_(1-x-y)Co_(x)M_(y)O_(2) cathode materials,so as to optimize the production process of preparing high-performance cathode *** this review,we summarize recent advances in the research and development of Ni-rich cathode precursor ***,the challenges faced by the Ni-rich hydroxide precursor materials are presented,including the effect of primary particle morphology and arrangement on the electrochemical performance of cathode materials,the influence of secondary particle morphology on lithium insertion reactions in cathode,and the effect of particle size on the microcracking of single-crystal ***,the presentation of the conventional co-precipitation reactor,the mechanism of precursor particle growth,and the influence of coprecipitation parameters are described in ***,the strategies are systematically discussed to solve the cha

关键词： Lithium-ion batteries Cathode materials Co-precipitation Ni-rich layered oxides Single crystal Precursor particles

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NO_(x) reduction against alkali poisoning over Ce(SO_(4))_(2)-V_(2)O_(5)/TiO_(2) catalysts by constructing the Ce^(4+)-SO_(4)^(2−)pair sites

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Chinese Chemical Letters 2024年第5期35卷 355-360页

作者： Shuangxi Li Huijun Yu Tianwei Lan liyi shi Danhong Cheng Lupeng Han Dengsong Zhang State Key Laboratory of Advanced Special Steel School of Materials Science and EngineeringInternational Joint Laboratory of Catalytic ChemistryCollege of SciencesShanghai UniversityShanghai 200444China

Commercial V_(2)O_(5)-based catalysts have been successfully applied in NH_(3) selective catalytic reduction(NH_(3)-SCR)of NO_(x) from power stations,but their poor alkali-resistance restrains the wider application in nonelectrical *** this study,NO_(x) reduction against alkali poisoning over V_(2)O_(5)/TiO_(2) is greatly improved via Ce(SO_(4))_(2) *** has been originally demonstrated that Ce^(4+)-SO_(4)^(2−)pair sites play crucial roles in improving NO_(x) reduction against alkali poisoning over V_(2)O_(5)/TiO_(2) *** strong interaction between V species and Ce sites of Ce^(4+)-SO_(4)^(2−)pairs triggers the reaction between NH_(4)^(+) species and gaseous NO via Eley-Rideal(E-R)reaction *** K-poisoning,the SO_(4)^(2−)sites of Ce^(4+)-SO_(4)^(2−)pairs as protective sites strongly bond with K and thus maintain the high reaction efficiency via the E-R reaction *** work demonstrates an effective strategy to enhance NO_(x) reduction against alkali poisoning over catalysts via constructing Ce^(4+)-SO_(4)^(2−)pair sites,contributing to developing alkali-resistant SCR catalysts for practical application in nonelectrical industries.

关键词： Air pollution control Selective catalytic reduction NOx reduction Alkali poisoning Ce(SO_(4))_(2)

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氟硅协同增强的UV固化透明高硬度双疏涂层的制备及性能

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高分子材料科学与工程 2024年第6期40卷 125-132页

作者：孙侠张智慧孙小英刘晶王艳杭建忠施利毅上海大学理学院纳米科学与技术研究中心上海200444

以全氟辛基乙基丙烯酸酯(17F)和四(3-巯基丙酸)季戊四醇酯(PETMP)为原料,通过迈克尔加成反应合成了氟改性多巯基交联剂(FPETMP)。红外光谱和核磁共振氢谱表征证实17F成功改性了多巯基交联剂,且合成的FPETMP中仍有未反应的巯基。将FPETMP... 详细信息

以全氟辛基乙基丙烯酸酯(17F)和四(3-巯基丙酸)季戊四醇酯(PETMP)为原料,通过迈克尔加成反应合成了氟改性多巯基交联剂(FPETMP)。红外光谱和核磁共振氢谱表征证实17F成功改性了多巯基交联剂,且合成的FPETMP中仍有未反应的巯基。将FPETMP与PETMP、(丙烯酰氧基丙基)甲基硅氧烷均聚物(APMS)混合,经紫外光引发巯基-烯点击反应制得透明双疏涂层。研究了FPETMP用量对涂层疏水疏油性、透明性和力学性能的影响。结果表明,随着FPETMP含量的增加,涂层的疏水疏油性增强。但是FPETMP用量太高时,体系相容性下降,涂层的透明度和铅笔硬度也随之变差。当FPETMP的质量分数为20%时,涂层对水和十六烷的接触角分别为116.5°和75.6°,且涂层的硬度较高,铅笔硬度为7H。涂层呈现出良好的光学透明性,综合性能最佳。

关键词： UV固化双疏涂层光学透明硬度

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Facile synthesis of Er^(3+)/Tm^(3+)co-doped magnetic/luminescent nanosystems for possible bioimaging and therapy applications

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Journal of Rare Earths 2022年第1期40卷 11-19页

作者： Hongyu Liu Jiabei Li Pengfei Hu Songqiang Sun liyi shi Lining Sun Research Center of Nano Science and Technology College of SciencesShanghai UniversityShanghai 200444China Department of Chemistry College of SciencesShanghai UniversityShanghai 200444China Institute of Nanochemistry and Nanobiology School of Environmental and Chemical EngineeringShanghai UniversityShanghai 200444China Instrumental Analysis&Research Center Shanghai UniversityShanghai 200444China

Manganese-zinc ferrite is a kind of very important magnetic ferrite *** properties of wide absorption band,sensitivity to ultraviolet(UV)light and tumor H_(2)O_(2) promise it to be possibly used as a photothermal therapy(PTT),photodynamic therapy(PDT)and chemodynamic therapy(CDT)*** on the unique advantages of rare-earth doped nanoparticles,an Er^(3+),Tm^(3+)co-doped upconversion-mediated nanosystem with manganese-zinc ferrite shell(named as UCNPS@M)was developed through a facile thermal co-decomposition *** final nanosystems were surface-modified by using dopamine hydrochloride(DA)in order to warrant good biocompatibility(named as UCNPS@M@DA).Under irradiation of near-infrared(NIR)light,UCNPS emit both ultraviolet and visible *** UV light is mostly abso rbed by manga nese-zinc ferrite shell to produce reactive oxygen species(ROS),which is essential to the potential PDT and CDT effect of nanosystems,and at the same time,Mn_(0.5)Zn_(0.5)Fe2O_(4) can further react with H_(2)O_(2) to promote the efficiency of *** is expected that UCNPS@M@DA can act as upconversion luminescence imaging guidance due to the visible emission from *** addition,the energy absorbed by the nanosystems can be transferred to heat to realize photothermal ***,UCNPS@M@DA was successfully applied as a T_(1)/T_(2)-weighted magnetic resonance imaging(MRI)contrast agent due to the existence of Gd,Mn,and Fe *** light of the upconversion luminescence(UCL)imaging from the UCNPS as well as potential PTT,PDT,CDT effect mentioned above,this work provides a possibility to realize cancer multi-model bioimaging guided treatment by using an all-in-one diagnosis and therapy nanosystem through a simple yet powerful strategy.

关键词： Manganese-zinc ferrite Upconversion nanoparticles Photothermal effect Reactive oxygen species Good biocompatibility Rare earths

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Ionic liquids for high performance lithium metal batteries

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Journal of Energy Chemistry 2021年第8期30卷 320-333,I0007页

作者： Kexin Liu Zhuyi Wang liyi shi Siriporn Jungsuttiwong Shuai Yuan School of Materials Science and Engineering Shanghai University200444 ShanghaiChina Research Centre of Nanoscience and Nanotechnology Shanghai University200444 ShanghaiChina Center for Organic Electronic and Alternative Energy Department of Chemistry and Center of Excellence for Innovation in ChemistryFaculty of ScienceUbon Ratchathani University34190 Ubon RatchathaniThailand Emerging Industries Institute Shanghai UniversityJiaxing 314006China

The pursuit of high energy density has promoted the development of high-performance lithium metal ***,it faces a serious security *** liquids have attracted great attention due to their high ionic conductivity,non-flammability,and the properties of promoting the formation of stable SEI *** understanding the problems existing in lithium metal batteries and the role of ionic liquids in them is of great significance for improving the performance of lithium metal *** article reviews the effects of the molecular structure of ionic liquids on ionic conductivity,Li^(+)ion transference number,electrochemical stability window,and lithium metal anode/electrolyte interface,as well as the application of ionic liquids in Li-high voltage cathode batteries,Li-O_(2) batteries and Li-S *** molecular design,composition and polymerization will be the main strategies for the future development of ionic liquid-based electrolytes for high performance lithium metal battery.

关键词： Ionic liquids Li+ion conduction Interface issues Lithium metal battery

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Direct transformation of FGD gypsum to calcium sulfate hemihydrate whiskers:Preparation,simulations,and process analysis

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Particuology 2015年第2期13卷 53-59页

作者： Miao Miao Xin Feng Gangling Wang Shaomei Cao Wen shi liyi shi Nano Science and Technology Research Center Shanghai University

Calcium sulfate hemihydrate （CSH） whiskers were synthesized by phase transition in CaCl2 solution under atmospheric pressure. Analytical-grade calcium sulfate dihydrate （AR CSD） was used as the raw material for the synthesis of CSH whiskers, according to orthogonal experiments. The effects of reaction tem- perature, AR CSD content, H2SO4 content, and reaction time were investigated, and the crystallization conditions were optimized. The as-prepared CSH whiskers displayed a regular morphology and a highly uniform size, with an aspect ratio of 105, A simulation system was also established by blending various sulfates with AR CSD, to evaluate the effects of impurities in flue gas desulfurization （FGD） gypsum. The main aim was to prepare CSH whiskers directly from FGD gypsum, without any purification, using the optimized conditions. This is a facile potential alternative process for large-scale production of CSH whiskers using abundant FGD gypsum as source materials.

关键词： FGD gypsum Calcium sulfate Whisker Direct transformation Simulation analysis

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Shape and size effects of ceria nanoparticles on the impact strength of ceria/epoxy resin composites

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Particuology 2011年第1期9卷 80-85页

作者： Xiaoqiang He Dengsong Zhang Hongrui Li Jianhui Fang liyi shi Research Center of Nano Science and Technology Shanghai University Shanghai 200444 China Department of chemistry Shanghai University Shanghai 200444 China

Ceria nanoparticles with various shapes （rods, cubes, and plates） and sizes were controllably synthesized and then introduced into epoxy resin. Subsequently, we investigated correlations between the shape and size of ceria nanostructures and the mechanical performance of composites. The samples were character- ized by transmission electron microscopy, scanning electron microscopy, and X-ray diffraction. Compared with commercial ceria filled composites, the composites made with morphology-controlled ceria nanos- tructures show a higher impact strength. It is found that epoxy resins made with high-aspect-ratio ceria nanorods show the highest impact strength, up to 17.27 kJ/m2, which is about four times that of the neat epoxy resin.

关键词： Nanoparticles Ceria Composite Mechanical properties

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Targeting proprotein convertase subtilisin/kexin type 9(PCSK9):from bench to bedside

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Signal Transduction and Targeted Therapy 2024年第2期9卷 509-557页

作者： Xuhui Bao Yongjun Liang Hanman Chang Tianji Cai Baijie Feng Konstantin Gordon Yuekun Zhu Hailian shi Yundong He liyi Xie Institute of Therapeutic Cancer Vaccines Fudan University Pudong Medical CenterShanghaiChina Shanghai Key Laboratory of Regulatory Biology School of Life SciencesEast China Normal UniversityShanghaiChina Department of Oncology Fudan University Pudong Medical CenterShanghaiChina Center for Clinical Research Fudan University Pudong Medical CenterShanghaiChina Clinical Research Center for Cell-based Immunotherapy Fudan UniversityShanghaiChina Department of Pathology Duke University Medical CenterDurhamNCUSA Center for Medical Research and Innovation Fudan University Pudong Medical CenterShanghaiChina Institute for Food Safety and Health Illinois Institute of TechnologyChicagoILUSA Department of Sociology University of MacaoTaipaMacaoChina Medical Institute Peoples’Friendship University of RussiaMoscowRussia A.Tsyb Medical Radiological Research Center ObninskRussia Department of Colorectal Surgery The First Affiliated Hospital of Harbin Medical UniversityHarbinHeilongjiangChina Shanghai Key Laboratory of Compound Chinese Medicines Institute of Chinese Materia MedicaShanghai University of Traditional Chinese MedicineZhangjiang Hi-tech ParkShanghaiChina Department of Radiation Oncology Fudan University Shanghai Cancer CenterShanghaiChina Department of Oncology Shanghai Medical CollegeFudan UniversityShanghaiChina

Proprotein convertase subtilisin/kexin type 9(PCSK9)has evolved as a pivotal enzyme in lipid metabolism and a revolutionary therapeutic target for hypercholesterolemia and its related cardiovascular diseases(CVD).This comprehensive review delineates the intricate roles and wide-ranging implications of PCSK9,extending beyond CVD to emphasize its significance in diverse physiological and pathological states,including liver diseases,infectious diseases,autoimmune disorders,and notably,*** exploration offers insights into the interaction between PCSK9 and low-density lipoprotein receptors(LDLRs),elucidating its substantial impact on cholesterol homeostasis and cardiovascular *** also details the evolution of PCSK9-targeted therapies,translating foundational bench discoveries into bedside applications for optimized patient *** advent and clinical approval of innovative PCSK9 inhibitory therapies(PCSK9-iTs),including three monoclonal antibodies(Evolocumab,Alirocumab,and Tafolecimab)and one small interfering RNA(siRNA,Inclisiran),have marked a significant breakthrough in cardiovascular *** therapies have demonstrated unparalleled efficacy in mitigating hypercholesterolemia,reducing cardiovascular risks,and have showcased profound value in clinical applications,offering novel therapeutic avenues and a promising future in personalized medicine for cardiovascular ***,emerging research,inclusive of our findings,unveils PCSK9’s potential role as a pivotal indicator for cancer prognosis and its prospective application as a transformative target for cancer *** review also highlights PCSK9’s aberrant expression in various cancer forms,its association with cancer prognosis,and its crucial roles in carcinogenesis and cancer *** conclusion,this synthesized review integrates existing knowledge and novel insights on PCSK9,providing a holistic perspective on its transformative impact in reshaping therapeutic paradigms acr

关键词： PCSK9 metabolism convert

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Controlled synthesis of porous spinel cobalt manganese oxides as efficient oxygen reduction reaction electrocatalysts

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Nano Research 2016年第1期9卷 207-213页

作者： Hongchao Yang Feng Hu Yejun Zhang liyi shi Qiangbin Wang Department of Chemistry Shanghai University 99 Shang-Da Road Shanghai200444 China Key Laboratory of Nano-Bio Interface Division of Nanobiomedicine and i-Lab Suzhou Institute of Nano-Tech and Nano-Bionics Chinese Academy of Sciences Suzhou 215123 China

In this article, we report a facile precursor pyrolysis method to prepare porous spinel-type cobalt manganese oxides （CoxMng-xO4） with controllable morphologies and crystalline structures. The capping agent in the reaction was found to be crucial on the formation of the porous spinel cobalt manganese oxides from cubic Co2MnO4 nanorods to tetragonal CoMn2O4 microspheres and tetragonal CoMn204 cubes, respectively. All of the prepared spinel materials exhibit brilliant oxygen reduction reaction （ORR） electrocatalysis along with high stability. In particular, the cubic Co2MnO4 nanorods show the best performance with an onset potential of 0.9 V and a half-wave potential of 0.72 V which are very close to the commercial Pt/C. Meanwhile, the cubic Co2MnO4 nanorods present superior stability with negligible degradation of their electrocatalytic activity after a continuous operation time of 10,000 seconds, which is much better than the commercial Pt/C electrocatalvst.

关键词： porous nanostructure cobalt manganese oxides electrocatalyst oxygen reduction reaction

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Influence of activated carbon fibres with different specific surface areas on the thermal conductive and electrical insulating properties of polyamide-imide composites

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High Voltage 2017年第3期2卷 161-166页

作者： Fang Jiang Li Chen Na Song liyi shi Peng Ding Research Center of Nanoscience and Nanotechnology Shanghai University99 Shangda RoadShanghai 200444People's Republic of China

In this study,the authors reported an influence of activated carbon fibres(ACFs)with different specific surface areas on the thermal conductive and electrical insulating properties of polymeric ***,the polyamide-imide composites were obtained via solution blending and cured *** composites exhibited thermal conductivity(TC)up to 0.62 W·m^(−1)·K^(−1).In addition,the composites were still insulating,having an electrical resistance of 0.7 MΩ.The experimental results suggested that the mechanical and electrical insulating properties decreased with the increasing of the specific surface area of the ***,it was found that the introduction of boron nitride was conducive to the TC and electrical insulating properties of the polymeric materials.

关键词： composites electrical thermal

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