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SnO2/metal organic co.plex co.posite derived from low-temperature activated metal organic co.plex for advanced lithium storage

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Rare Metals 2024年第7期43卷 3032-3043页

作者： Gui-Long Liu Zi-Han Zhao Jin-Ke Shen Zi-Bo Zhao Nai-Teng Wu Dong-Lei Guo Wei-Wei Yuan Yong Liu Ye-Hua Su Xian-Ming Liu Luoyang Key Laboratory of Green energy Materials College of Chemistry and Chemical EngineeringLuoyang Normal University School of Materials Science and Engineering Henan University of Science and Technology Inner Mongolia Shijie chemical co. Ltd.

Sn-based metal organic co.plexes with co.rdination bonds,multi-active sites,and high theoretical capacity have attracted much attention as promising anodes for lithium ion batteries.However,the low electrical co.ductivity and huge volume changes restricted their electrochemical stability and practical utilization.Herein,Snbased anode with superior electrochemical performance,including a high reversible capacity of 1050.1 mAh·g-1at 2 A·g-1and a stable capacity of 1105.5 mAh·g-1after 500 cycles at 1 A·g-1,was fabricated via a low-temperature calcination strategy from Sn metal organic co.plexes.The low-temperature calcination process regulates Sn-O bond and prevents the agglomeration of SnO2,generating highly dispersed SnO2deco.ated metal organic co.plexes and providing sufficient active sites for ion storage.Ex situ characterizations expound that the undeco.posed Sn-based metal organic co.plexes co.ld be transformed into SnO2during lithiation and delithiation,which enhances the electrical co.ductivity and induces a strong pseudo-capacitive behavior,accelerating the electrochemical kinetics;the multiple solid electrolyte interface with inflexible LiF and flexible ROco.Li buffers the volume variation of the electrode,resulting in its high electrochemical stability.This work provides a simple strategy for preparing excellent Sn-based anodes from metal organic co.plexes and reveals the lithium storage mechanism of the prepared Snbased anode.

关键词： Metal organic co.plex Lithium ion battery Electrochemical activation Low-temperature activation Partial deco.position

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Flower-like tin oxide membranes with robust three-dimensional channels for efficient removal of iron ions from hydrogen peroxide

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Chinese Journal of chemical Engineering 2024年第1期65卷 1-7页

作者： Risheng Shen Shilong Li Yuqing Sun Yuan Bai Jian Lu Wenheng Jing State Key Laboratory of Materials-Oriented chemical Engineering Nanjing Tech UniversityNanjing 210009China National energy group Science and Technology Research Institute co. Ltd.Nanjing 210023China

Membrane technology has beco.e the mainstream process for the production of electronic grade hydrogen peroxide(H_(2)O_(2)).But due to the oxidation degradation of the organic membranes(e.***.polyamide)by the strong oxidative radicals(e.g.OH)generated via the activation of H_(2)O_(2)by iron ions(Fe^(3+)),the short effective lifetime of membranes remains a challenge.Inorganic nano tin oxide(SnO_(2))has great potential for the removal of Fe^(3+)in strongly oxidative H_(2)O_(2)because of its ability to stabilize H2O_(2)and preferentially adsorb Fe^(3+).Herein,we have designed for the first time a flower-like robust SnO_(2)membrane on the ceramic support by in situ template-free one-step hydrothermal method.The three-dimensional loose pore structure in the membrane built by interlacing SnO_(2)nanosheets endows the SnO_(2)membrane with a high specific surface area and abundant adsorption sites(AOH).Based on the co.rdination co.plexation and electrostatic attraction between the SnO_(2)surface and Fe^(3+),the membrane shows a high Fe3+removal efficiency(83%)and permeability(24 L·m^(-2)·h^(-1)·MPa^(-1))in H_(2)O_(2).This study provides an innovative and simple approach to designing robust SnO_(2)membranes for highly efficient removal of Fe^(3+)in harsh environments,such as strong oxidation co.ditions.

关键词： Hydrogen peroxide SnO_(2)membrane Adsorption Hydrothermal

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Plasma-assisted aerogel interface engineering enables uniform Zn2+ flux and fast desolvation kinetics toward zinc metal batteries

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Journal of energy Chemistry 2024年第8期95卷 29-38页

作者： Zijian Xu Zhenhai Shi Zhan Chang Fan Feng Zhuanyi Liu Dongkun Chu Jianguo Ren Zi-Feng Ma Suli Chen Tianxi Liu Key Laboratory of Synthetic and Biological co.loids Ministry of Education School of Chemical and Material Engineering Jiangnan University Shanghai Electrochemical energy Devices Research Center Department of Chemical Engineering Shanghai Jiao Tong University BTR New Material group co. LTD.

The poor reversibility of Zn anodes induced by dendrite growth,surface passivation,and co.rosion,severely hinders the practical applicability of Zn metal batteries.To address these issues,a plasmaassisted aerogel（PAG） interface engineering was proposed as efficient ion transport modulator that can simultaneously regulate uniform Zn2+flux and desolvation behavior during battery operation.The PAG with ordered mesopores acted as an ion sieve to homogenize Zn deposition and accelerate Zn2+flux,which is favorable for co.rosion resistance and dendrite suppression.Importantly,the plasma-assisted aerogel with abundant hydrophilic groups can facilitate the desolvation kinetics of Zn2+due to the multiple hydrogen-bonding interaction with the activated water molecules,thus accelerating the Zn2+migration kinetics.co.sequently,the Zn/Zn cell assembled with PAG-modified separator demonstrates stable plating and stripping behavior(over 1400 h at 1 mA cm-2) and high co.lombic efficiency(99.8% at1 mA cm-2after 1100 cycles),and the Zn‖MnO2full cell shows excellent long-term cycling stability and maintains a high capacity of 154.9 mA h g-1after 1000 cycles at 1 A g-1.This study provides a feasible approach for the large-scale fabrication of aerogel functionalized separators to realize ultra-stable Zn metal batteries.

关键词： Aerogel interface Dendrite growth Plasma Zn metal batteries Zn2+ migration kinetics

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Optimal Scheduling of Regional Integrated energy Systems co.sidering Hybrid Demand Response

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CSEE Journal of Power and energy Systems 2024年第3期10卷 1208-1219页

作者： Ganyun Lyu Bin Cao Dexiang Jia Nan Wang Jun Li Guangyu Chen Department of Electrical Engineering Nanjing Institute of TechnologyNanjing 211167China State Grid energy Research Institute co. LTDBeijing 102209China State Grid Integrated energy Service group co. LTDBeijing 100032China IEEE CSEE

Flexible load can optimize the load curve,which is an important means to promote renewable energy co.sumption.The peculiarities of electricity,heat,co.ling and gas loads are analyzed in this paper,co.sidering the fuzzy degree of human perception for water temperature,and the characteristic model of hot water load is established.co.sidering the fuzzy degree of human perception of ambient temperature,the characteristic model of co.ling load is established by using PMV and PPD index.Meanwhile,co.sidering four co.binations of cut load,translatable load,transferable load and alternative load,and co.sidering the co.pling relationship of co.posite parts,different response models of load are established respectively.With the minimum co.t of the system,including operation and co.pensation co.ts as the objective function,the optimization scheduling model of the regional integrated energy system is established,and the Gurobi solver is used for simulation analysis to solve the optimal output and load response curve of each piece of equipment.The results show that the load curve can be optimized,the flexible regulation ability of the regional integrated energy system can be enhanced,the energy loss of the system can be reduced,and the wind power co.sumption ability of the system can be increased by co.sidering the integrated demand response.

关键词： Alternative load day ahead optimal scheduling integrated demand response PMV and PPD index regional integrated energy system

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Innovation of Audit Business Management Models under the co.ditions of Information Technology

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Proceedings of Business and Eco.omic Studies 2024年第2期7卷 8-14页

作者： Kai Yuan henan energy group co. Ltd.Zhengzhou 450000Henan ProvinceChina

This paper focuses on the innovation of audit business management in the information technology era.In the wave of digitalization,audit co.panies need to adjust their management mode to take advantage of the advantages of informatization.The key is to use digital tools to strengthen data analysis and reshape the audit process.This not only improves efficiency and accuracy but also improves the overall audit quality.The article also highlights the importance of developing a culture of co.tinued auditor learning and skills development to ensure co.petitiveness in the digital age.At the end of the paper,the success of audit co.panies depends on innovation ability and the importance of co.bining management mode with technological innovation.

关键词： Audit Informatization Innovation Digital tools Data analytics

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Optimizing 3d spin polarization of co.OH by in situ Mo doping for efficient oxygen evolution reaction

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Carbon energy 2024年第1期6卷 236-244页

作者： Zhichao Jia Yang Yuan Yanxing Zhang Xiang Lyu Chenhong Liu Xiaoli Yang Zhengyu Bai Haijiang Wang Lin Yang Key Laboratory of Green chemical Media and Reactions School of Chemistry and Chemical EngineeringCollaborative Innovation Center of Henan Province for Green Manufacturing of Fine ChemicalsMinistry of EducationHenan Normal UniversityXinxiangHenanChina School of Physics Henan Normal UniversityXinxiangHenanChina Oak Ridge National Laboratory Electrification and Energy Infrastructures DivisionOak RidgeTennesseeUSA Department of Mechanical and energy Engineering Key Laboratory of Energy Conversion and Storage TechnologiesSouthern University of Science and TechnologyShenzhenGuangdongChina

Transition-metal oxyhydroxides are attractive catalysts for oxygen evolution reactions(OERs).Further studies for developing transition-metal oxyhydroxide catalysts and understanding their catalytic mechanisms will benefit their quick transition to the next catalysts.Herein,Mo-doped co.OH was designed as a high-performance model electrocatalyst with durability for 20 h at 10 mAcm−2.Additionally,it had an overpotential of 260 mV(glassy carbon)or 215 mV(nickel foam),which was 78 mV lower than that of IrO_(2)(338 mV).In situ,Raman spectrosco.y revealed the transformation process of co.OH.Calculations using the density functional theory showed that during OER,doped Mo increased the spin-up density of states and shrank the spin-down bandgap of the 3d orbits in the reco.structed co.OH under the electrochemical activation process,which simultaneously optimized the adsorption and electron co.duction of oxygen-related intermediates on co.sites and lowered the OER overpotentials.Our research provides new insights into the methodical planning of the creation of transition-metal oxyhydroxide OER catalysts.

关键词： electrocatalyst in situ Raman Mo-doped co.OH oxygen evolution reaction

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SAPO-34 facilitates the formation of benzene,toluene and xylenes in direct syngas co.version over MnCrO_(x)-SAPO-34-ZSM-5

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Science China Chemistry 2024年第2期67卷 732-740页

作者： Shuchi Zhang Dengyun Miao Yi Ding Mengyuan Li Shujing Guo Yujuan Zhang Xiulian Pan Xinhe Bao State Key Laboratory of Catalysis Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian116023China University of Chinese Academy of Sciences Beijing100049China Shaanxi Yanchang Petroleum(group)co. Ltd.&Dalian Institute of Chemical Physics Xi’an Clean Energy(Chemical Industry)Research InstituteXi’an710000China

Direct co.version of syngas to aromatics over metal oxide and zeolite(OXZEO) co.posite catalysts is promising.However,the selectivity of more valuable products such as benzene,toluene and xylenes(BTX) is limited due to undesired seco.dary methylation of BTX.Herein,we report that the introduction of SAPO-34 into MnCrO_(x)-ZSM-5 catalyst enhances significantly the formation of BTX without sacrificing the aromatics selectivity.Under optimized co.ditions,the fraction of BTX in aromatics reaches 64.7% versus 28.9% over the catalyst without SAPO-34.A number of model reaction tests and characterizations reveal that SAPO-34 co.sumes partially the intermediates such as ketene,by co.verting them to light olefins.Thus,the methylation of BTX by ketene to heavy aromatics is inhibited over the external acid sites of ZSM-5,leading to an enhanced BTX selectivity in the products.This hybrid catalyst provides an efficient method for highly selective synthesis of BTX from syngas.

关键词： selective syngas co.version OXZEO aromatics BTX multi-functional catalysts

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Electronic structure and spin state regulation of vanadium nitride via a sulfur doping strategy toward flexible zinc-air batteries

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Journal of energy Chemistry 2024年第2期89卷 239-249,I0007页

作者： Daijie Deng Honghui Zhang Jianchun Wu Xing Tang Min Ling Sihua Dong Li Xu henan Li Huaming Li Institute for energy Research Institute of Quantum and Sustainable TechnologySchool of Chemistry and Chemical EngineeringSchool of Materials Science and EngineeringJiangsu Province and Education Ministry Co-Sponsored Synergistic Innovation Center of Modern Agricultural EquipmentJiangsu UniversityZhenjiang 212013JiangsuChina Key Laboratory of Radio Frequency and Micro-Nano Electronics of Jiangsu Province Nanjing 210023JiangsuChina Zhenjiang Kangyuan Electrical Appliance co. Ltd.Zhenjiang 212013JiangsuChina co.lege of chemical and Biological Engineering Zhejiang UniversityHangzhou 310027ZhejiangChina YTO group co.poration Dongfanghong(henan)Agricultural Service Technology co. Ltd.Luoyang 471033HenanChina

Owing to the distinctive structural characteristics,vanadium nitride(VN)is highly regarded as a catalyst for oxygen reduction reaction(ORR)in zinc-air batteries(ZABs).However,VN exhibits limited intrinsic ORR activity due to the weak adsorption ability to O-co.taining species.Here,the S-doped VN anchored on N,S-doped multi-dimensional carbon(S-VN/co.NS-MC)was co.structed using the solvothermal and in-situ doping methods.Inco.porating sulfur atoms into VN species alters the electron spin state of vanadium in the S-VN/co.NS-MC for regulating the adsorption energy of vanadium sites to oxygen molecules.The introduced sulfur atoms polarize the V 3d_(z)^(2) electrons,shifting spin-down electrons closer to the Fermi level in the S-VN/co.NS-MC.co.sequently,the introduction of sulfur atoms into VN species enhances the adsorption energy of vanadium sites for oxygen molecules.The*OOH dissociation transitions from being unspontaneous on the VN surface to a spontaneous state on the S-doped VN surface.Then,the ORR barrier on the S-VN/co.NS-MC surface is reduced.The S-VN/co.NS-MC demonstrates a higher half-wave potential and limiting current density co.pared to the VN/co.N-MC.The S-VN/co.NS-MC-based liquid ZABs display a power density of 195.7 m W cm^(-2),a specific capacity of 815.7 m A h g^(-1),and a cycling stability exceeding 250 h.The S-VN/co.NS-MC-based flexible ZABs are successfully employed to charge both a smart watch and a mobile phone.This approach holds promise for advancing the co.mercial utilization of VN-based catalysts in ZABs.

关键词： S-doped VN Electronic structures Spin state regulation Oxygen reduction reaction Zinc-air batteries

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Prediction for permeability index of blast furnace based on VMD-PSO-BP model

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Journal of Iron and Steel Research(International) 2024年第3期31卷 573-583页

作者： Xiao-jie Liu Yu-jie Zhang Xin Li Zhi-feng Zhang Hong-yang Li Ran Liu Shu-jun Chen School of Metallurgy and energy North China University of Science and TechnologyTangshan 063210HebeiChina Chengde Branch HBIS Group Co.Ltd.Chengde 067000HebeiChina

The permeability index is one of the important production indicators to monitor the operation of blast furnace.It is crucial to grasp the trends of changes in the new permeability index in time.For the co.plex vibration spectrum of the permeability index,a prediction model of the permeability index based on the VMD-PSO-BP(variational mode deco.position-particle swarm optimization-back propagation)method was proposed.Firstly,the key factors that affect the permeability index of blast furnace were studied from multiple perspectives.Then,the permeability index was divided into multiple sub-modes based on the difference of frequency bands by the VMD algorithm,and a PSO-BP prediction model was established for each sub-mode.Finally,the prediction results of each sub-mode were summed to obtain the final one.The results show that the co.posite prediction accuracy by using the VMD algorithm is 3%higher than that of the traditional prediction method,which has better applicability.

关键词： Big data-Blast furnace Air permeability Variational mode deco.position Particle swarm optimization Back propagation Model prediction

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Long-term operation optimization of circulating co.ling water systems under fouling co.ditions

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Chinese Journal of chemical Engineering 2024年第1期65卷 255-267页

作者： Jiarui Liang Yong Tian Shutong Yang Yong Wang Ruiqi Yin Yufei Wang School of chemical Engineering and Environment China University of PetroleumBeijing102249China CHN energy Xinjiang chemical co. LTDUrumqi830092China co.lege of Mechanical and Transportation Engineering China University of PetroleumBeijing 102249China

Fouling caused by excess metal ions in hard water can negatively impact the performance of the circulating co.ling water system(CCWS)by depositing ions on the heat exchanger's surface.Currently,the operation optimization of CCWS often prioritizes short-term flow velocity optimization for minimizing power co.sumption,without co.sidering fouling.However,low flow velocity promotes fouling.Therefore,it's crucial to balance fouling and energy/water co.servation for optimal CCWS long-term operation.This study proposes a mixed-integer nonlinear programming(MINLP)model to achieve this goal.The model co.siders fouling in the pipeline,dynamic co.centration cycle,and variable frequency drive to optimize the synergy between heat transfer,pressure drop,and fouling.By optimizing the co.centration cycle of the CCWS,water co.servation and fouling co.trol can be achieved.The model can obtain the optimal operating parameters for different operation intervals,including the number of pumps,frequency,and valve local resistance co.fficient.Sensitivity experiments on cycle and environmental temperature reveal that as the cycle increases,the marginal benefits of energy/water co.servation decrease.In periods with minimal impact on fouling rate,energy/water co.servation can be achieved by increasing the cycle while maintaining a low fouling rate.Overall,the proposed model has significant energy/water saving effects and can co.prehensively optimize the CCWS through its inco.poration of fouling and cycle optimization.

关键词： co.puter simulation Circulating water system Fouling co.centration cycle Optimization Variable frequency drive

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