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A self-adaptive inorganic in-situ separator by particle crosslinking for nonflammable lithium-ion batteries

Journal of Energy Chemistry 2025年第1期100卷 469-480页

作者： Jiarui Yang Jiuzhou Liu Wenrui Cai Ziyu Zhao Shan Wang Lu He shanshan lv Zhiwei Zhu Zhongfeng Ji Guojiang Wen Hua Li Yuanming Zhai Xuewei Fu Wei Yang Yu Wang College of Polymer Science and Engineering State Key Laboratory of Polymer Materials EngineeringSichuan UniversityChengdu 610065SichuanChina

All-safe liquid-state lithium-ion batteries(ASLS-LIBs) is of great interest as they can potentially combine the safety of all-solid-state batteries with the high performance and low manufacturing cost of traditional liquid-state LIBs. However, the practical success of ASLS-LIBs is bottlenecked by the lack of advanced separator technology that can simultaneously realize high performances in puncturing-tolerability,fire-resistance, and importantly, wetting-capability with non-flammable liquid-electrolytes. Here, we propose a concept of inorganic in-situ separator(IISS) by hybrid-sol physical crosslinking directly onto the electrode surface to address the above challenges. Particularly, the hybrid-sol is designed with silica nanoparticles as the building block and poly(vinylidene difluoride) nanoparticles as the crosslinking agent. The critical factors for controlling the IISS microstructures and properties have been systematically investigated. The advantages of the IISS have been confirmed by its fast wetting with various fireresistant liquid-electrolytes, customizable thickness and porous structures, robust interface with planar or three-dimensional(3D)-structured electrodes, and importantly, unexpected self-adaptability against puncturing. Enabled by the above merits, a fire-resistant ASLS-LIB is successfully assembled and demonstrated with stable electrochemical performance. This sol-crosslinked IISS may open an avenue for the studies on the next-generation separator technology, cell assembling, solid electrolyte processing as well as non-flammable secondary batteries.

关键词： Safe liquid-state lithium-ion batteries In-situ separator technology Hybrid-sol physical crosslinking Electrode coating Inorganic nonflammable separator

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Cobalt-manganese bimetallic organic frameworks catalyzed solvent-free oxidation of benzyl C-H bonds with O_(2) as sole oxidant

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Nano Research 2024年第11期17卷 9532-9539页

作者： Ke Cao Yan Zhou shanshan lv Mengmeng Feng Changjin Qian Zheng Chen Key Laboratory of Functional Molecular Solids Ministry of Education College of Chemistry and Materials Science Anhui Normal University Wuhu 241002 China State Key Laboratory of Coordination Chemistry Nanjing University Nanjing 210023 China

The selective oxidation of hydrocarbons can be used to produce oxygen-containing functional compounds such as alcohols, aldehydes or ketones and its efficient and green conversion lies in the development of efficient catalysts that activate C-H bonds and O_(2) simultaneously. In this work, the bimetallic organic framework (CoMnBDC) material with morphology of stacked nanosheets was synthesized using terephthalic acid as ligands to coordinate with Co^(2+) and Mn^(2+) cations under solvothermal conditions. As revealed by spectroscopic characterizations, the electron transfer from Mn to Co in the CoMnBDC resulted in the reduction of the Co average oxidation state and increase of the Mn average oxidation state. The CoMnBDC nanosheets were used as catalyst in catalytic oxidation of ethylbenzene, in which the redox effect promotes the effective electron transfer, the activation of O_(2) and benzyl C-H bond. The 96.2% conversion of ethylbenzene and 98.0% selectivity towards acetophenone could be obtained with oxygen as sole oxidant and solvent-free condition. The excellent catalytic performance is related to the structure of CoMnBDC and is also the best when compared with reported results. Various types of aromatic hydrocarbons containing benzyl C-H bonds can be effectively oxidized by CoMnBDC to produce corresponding ketone products. The density functional theory (DFT) calculation revealed that the redox effect leads to the relative enrichment of electrons on Co in CoMnBDC, which is conducive to the activation of O_(2);Mn with higher oxidation state is beneficial for the adsorption of ethylbenzene and activation of C-H bonds. The CoMnBDC has a lower energy barrier for transition state, making it easier for the ethylbenzene oxidation to produce acetophenone.

关键词： metallic organic framework transition metal nanocatalysis oxidation ketone

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Effect of Microwave Irradiation on Dipeptides and Proteins Derived from Silk During Solvation

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Advanced Fiber Materials 2022年第3期4卷 448-456页

作者： Na Li Ying Ma Niuniu Chen Xiaoyu Tang shanshan lv State Key Laboratory of Organic-Inorganic Composite Materials Beijing University of Chemical Technology15 BeisanhuanDong RoadChaoyang DistrictBeijing 100029China

Silkworm silk and spider silk have been attracting numerous *** solvation of silkworm silk protein and spider silk protein without hydrolysis of peptide bonds is highly *** irradiation has been proposed for facile extraction of water-soluble silk protein by various liquid ***,microwave exposure can cause hydrolysis of peptide bonds,leading to irreversible degradation of silk *** this study,a series of representative dipeptides and a rationally designed recombinant protein derived from silk protein is employed to investigate the efect of microwave on the stability of the peptide bonds during a long time dissolution process,i.e.,heating at 60℃in a CaCl_(2):CH_(3)CH_(2)OH:H_(2)O(1:2:8)*** demonstrate that microwave irradiation imposes a minor damage and a negligible cleavage of the peptide bonds,compared with the conventional heating *** microwave irradiation treatment suggested in this is suitable for dissolution of silk *** is anticipated that this approach can be developed to a commercial level commercially.

关键词： Silk Protein Peptide Peptide bond Microwave

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Insight into sulfur and iron effect of binary nickel-iron sulfide on oxygen evolution reaction

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Nano Research 2022年第3期15卷 1901-1908页

作者： Qikang Wu Songrui Wang Jiahui Guo Xueqing Feng Han Li shanshan lv Yan Zhou Zheng Chen Key Laboratory of Functional Molecular Solids Ministry of EducationCollege of Chemistry and Materials ScienceAnhui Normal UniversityWuhu 241002China

Nickel-iron sulfide has shown attractive activity in electrocatalytic oxygen evolution reaction(OER).However,the effects of low valence sulfur(S^(2−))and metal species on OER in binary nickel-iron sulfide have rarely been systematically *** based on post-catalysis characterization have led to the assumption that the real active species are nickel-iron oxyhydroxide,and that nickel-iron sulfide acts only as a ***,to study the role of S,Ni,and Fe for the development of nickel-iron sulfide catalyst is of self-evident ***,a facile solvothermal method is used to synthesize acetylene black coated with nickel-iron sulfide *** tests show that the presence of low valence S species makes the catalyst have faster OER kinetics,larger active area,and intermediate active species adsorption ***,the present study reveals the enhancing effect of low valence sulfur species(S^(2−))on OER in binary nickel-iron *** situ Raman spectroscopy shows that the generation ofγ-NiOOH intermediate is essential and Fe does not directly participate in the oxygen *** functional theory(DFT)calculation shows that Ni-OH deprotonation is a rate-determining step for both binary nickel-iron sulfide and nickel *** addition of Fe into NiSx lightly increases the charge transfer of Ni atom to O atom,which makes deprotonation easier and thereby improves the OER performance.

关键词： oxygen evolution reaction nickel-iron sulfide electrocatalyst low valence S species in-situ Raman

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Microwave-assisted sol-gel synthesis of hydroxyapatite nanoparticles

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北京化工大学学报（自然科学版） 2019年第3期46卷 7-15页

作者： CHEN ChunYu DING Xuan LI ShouChuan SUN BaoChang lv shanshan State Key Laboratory of Organic-Inorganic Composite Materials College of Chemical EngineeringBeijing University of Chemical Technology State Key Laboratory of Analytical Chemistry for Life Science Nanjing University

A rapid sol-gel method for preparing hydroxyapatite nanoparticles(nHAP) has been developed. Three different sets of experimental conditions, in terms of solvents(water and ethanol), synthesis temperatures(25, 40 and 60℃), and microwave irradiation(on and off) were explored. Crystal phase composition, functional groups and morphology of the products were characterized by thermogravimetric analysis(TGA), X-ray diffraction(XRD), Fourier transform infrared spectroscopy(FT-IR), scanning electron microscopy(SEM) and transmission electron microscopy(TEM). The solvent and temperature were optimized based on product properties. Most importantly, the microwave-assisted method(with little to no ageing necessary) was much faster than the conventional methods(with slow ageing processes needing from hours to days), while affording pure nHAP with virtually identical morphological and structural properties. This study represents a practical application of the powerful microwave technique in synthesis of nHAP, offering guidance on the selection of optimum experiment conditions.

关键词： hydroxyapatite sol-gel temperature microwave

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Engineering electrophilic atomic Ir sites on CeO_(2) colloidal spheres for selectivity control in hydrogenation of α,β-unsaturated carbonyl compounds

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Nano Research 2022年第8期15卷 7107-7115页

作者： Muhammad Mateen Muhammad Nadeem Akhtar Ling Gao Weng-Chon(Max)CHEONG shanshan lv Yan Zhou Zheng Chen College of Environment and Resources Chongqing Technology and Business UniversityChongqing 400067China Department of Chemistry The Islamia University of BahawalpurBahawalpurPakistan Department of Physics and Chemistry Faculty of Science and TechnologyUniversity of MacaoMacao 999078China School of Chemistry and Materials Science Anhui Normal UniversityWuhu 241002China

Selective hydrogenation of the carbonyl bond inα,β-unsaturated carbonyl compounds is rather challenging owing to the more feasible hydrogenation of ethylenic bond from both thermodynamic and kinetic ***,we demonstrate a facile emulsionbased molecule-nanoparticle self-assembly strategy for the atomic engineering of Ir species on three-dimensional CeO_(2)spheres(Ir1@CeO_(2)).When applied to the hydrogenation ofα,β-unsaturated aldehydes,Ir1@CeO_(2)catalyst remarkably exhibited~100%selectivity towards unsaturated alcohols,whereas the formation of Ir nanoparticles on CeO_(2)drastically decreased the selectivity for unsaturated *** studies revealed that strong metal-support interactions triggered the charge transfer from Ir to CeO_(2),leading to the partial reduction of Ce^(4+)to Ce^(3+)along with the formation new Ir^(δ+)-O_(2)--Ce^(3+)(OV)*** electrophilic atomic Ir species at the Ir^(δ+)-O_(2)--Ce^(3+)(OV)interfaces would therefore preferentially adsorb and facilitate hydrogenation of polar C=O bond to achieve exceptional selectivity.

关键词： unsaturated carbonyl compounds ceria colloidal spheres single atom catalyst self-assembly hydrogenation

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Simulation Monitoring for Rainfall Infiltration in Soil Based on High Density Electrical Method

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Journal of Geoscience and Environment Protection 2021年第5期9卷 1-7页

作者： shanshan lv Dengke He School of Geoscience and Surveying Engineering China University of Mining and Technology Beijing China

Rainfall infiltration is a porous medium flow problem with variable saturation. Based on the theoretical analysis of the flow field, electrical conductivity of rocks, the electrical field, the paper simulates the coupling relationship between the water saturation in soil and the apparent resistivity distribution. It combines the Richards equation, the Archie formula and the Laplace equation. The experiment simulates the potential field data by the Wenner setting in electrical exploration on a two-layer geologic model with continuous rainfall during 5 days, which shows that the effective saturation in soil is increasing with the rainfall time, while the apparent resistivity is decreasing. This can provide a theoretical basis for the analyzing the rainfall infiltration and porosity of the soil by using high-density electrical method in the future.

关键词： Rainfall Infiltration Multi Physical Field Coupling Numerical Simulation High Density Electrical Method

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Simulation Monitoring for Rainfall Infiltration in Soil Based on High Density Electrical Method

Simulation Monitoring for Rainfall Infiltration in Soil Base...

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作者： shanshan lv Dengke He School of Geoscience and Surveying Engineering China University of Mining and Technology

Rainfall infiltration is a porous medium flow problem with variable saturation. Based on the theoretical analysis of the flow field, electrical conductivity of rocks, the electrical field, the paper simulates the coupling relationship between the water saturation in soil and the apparent resistivity *** combines the Richards equation, the Archie formula and the Laplace equation. The experiment simulates the potential field data by the Wenner setting in electrical exploration on a two-layer geologic model with continuous rainfall during 5 days, which shows that the effective saturation in soil is increasing with the rainfall time, while the apparent resistivity is decreasing. This can provide a theoretical basis for the analyzing the rainfall infiltration and porosity of the soil by using high-density electrical method in the future.

关键词： Rainfall Infiltration Multi Physical Field Coupling Numerical Simulation High Density Electrical Method

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Research on FBG-Based CFRP Structural Damage Identification Using BP Neural Network

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Photonic Sensors 2018年第2期8卷 168-175页

作者： Xiangyi GENG Shizeng LU Mingshun JIANG Qingmei SUI shanshan lv Hang XIAO Yuxi JIA Lei JIA School of Control Science and Engineering Shandong University Jinan 250061 China School of Electrical Engineering University of Jinan Jinan 250022 China Key Laboratory for Liquid-Solid Structural Evolution & Processing of Materials (Ministry of Education) Shandong University Jinan 250061 China

A damage identification system of carbon fiber reinforced plastics （CFRP） structures is investigated using fiber Bragg grating （FBG） sensors and back propagation （BP） neural network. FBG sensors are applied to construct the sensing network to detect the structural dynamic response signals generated by active actuation. The damage identification model is built based on the BP neural network. The dynamic signal characteristics extracted by the Fourier transform are the inputs, and the damage states are the outputs of the model. Besides, damages are simulated by placing lumped masses with different weights instead of inducing real damages, which is confirmed to be feasible by finite element analysis （FEA）. At last, the damage identification system is verified on a CFRP plate with 300mm × 300mm experimental area, with the accurate identification of varied damage states. The system provides a practical way for CFRP structural damage identification.

关键词： Carbon fiber reinforced polymer damage identification FBG sensors neural network finite elementanalysis

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血液灌流治疗孙氏手术后早期细胞因子风暴的临床研究

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中国体外循环杂志 2025年第01期23卷 36-39+57页

作者：李香敏吕珊珊贺清冯波闫晓丽郑云张春蕾马继鹏赵荣金振晓张平空军军医大学第二附属医院肾脏内科空军军医大学第一附属医院心血管外科

目的研究血液灌流（HP）治疗孙氏手术后早期细胞因子风暴（CS）的临床效果。方法回顾性收集空军军医大学第一附属医院心血管外科2021年7月至2023年7月期间收治急性A型主动脉夹层行孙氏手术后24 h内发生CS的患者资料，共54例。按照患... 详细信息

目的研究血液灌流（HP）治疗孙氏手术后早期细胞因子风暴（CS）的临床效果。方法回顾性收集空军军医大学第一附属医院心血管外科2021年7月至2023年7月期间收治急性A型主动脉夹层行孙氏手术后24 h内发生CS的患者资料，共54例。按照患者是否应用HP治疗分为血液灌流组（27例）和对照组（27例），比较两组患者的预后情况差异。结果两组患者的基线资料无统计学差异。HP治疗可明显降低患者白介素-6(1 d、2 d、3 d、4 d、7 d均P 0.999）、连续性肾替代治疗（CRRT）(P> 0.999)、肺部感染（P=0.728）、死亡（P> 0.999）等发生率差异无统计学意义。结论 HP治疗可降低孙氏手术后早期CS患者白细胞介素-6及C-反应蛋白水平，缩短机械通气时间、ICU住院时间及术后住院时间，但未能改善术后谵妄、肺部感染、死亡发生及减少二次插管和CRRT应用。

关键词：血液灌流体外循环孙氏手术中低温停循环 A型主动脉夹层细胞因子风暴围术期

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