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A Web-like Three-dimensional Binder for Silicon Anode in lithium-ion Batteries

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Energy & Environmental Materials 2024年第1期7卷 21-27页

作者： liyuan li Tao li Yifan Sha Baozeng Ren Lan zhang Suojiang zhang CAS Key Laboratory of Green Process and engineering Beijing Key Laboratory of Ionic Liquids Clean ProcessState Key Laboratory of Multiphase Complex SystemsInstitute of Process EngineeringChinese Academy of SciencesBeijing 100190China school of chemical engineering Zhengzhou UniversityZhengzhou 450001China Langfang Green Industrial technology Center Langfang 065001China Henan Key Laboratory of Energy Storage Materials and Processes Zhengzhou Institute of Emerging Industrial TechnologyZhengzhou 450003China

Si anode is of paramount importance for advanced energy-dense lithium-ion batteries(liBs).However,the large volume change as well as stress generates during its lithiation-delithiation process poses a great challenge to the long-term cycling and hindering its *** this work,a composite binder is prepared with a soft component,guar gum(GG),and a rigid linear polymer,anionic polyacrylamide(APAM).Rich hydroxy,carboxyl,and amide groups on the polymer chains not only enable intermolecular crosslinking to form a web-like binder,A2G1,but also realize strong chemical binding as well as physical encapsulating to Si *** resultant electrode shows limited thickness change of merely 9%on lithiation and almost recovers its original thickness on *** demonstrates high reversible capacity of 2104.3 mAh g^(-1)after 100 cycles at a current density of 1800 mA g^(-1),and in constant capacity(1000 mAh g^(-1))test,it also shows a long life of 392 ***,this soft-hard combining web-like binder illustrates its great potential in the future applications.

关键词： anionic polyacrylamide lithium-ion batteries Si anode thickness change web-like binder

A study of phosphate adsorption by different temperature treated hydrous cerium oxides

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Rare Metals 2011年第1期30卷 58-62页

作者： GUO Huichao li Wenjun WANG Huanying zhang Jinghua liu Yang ZHOU Yue school of Metallurgical and Ecological engineering University of Science and Technology Beijing Beijing 100083 China school of Applied Science University of Science and Technology Beijing Beijing 100083 China Beijing Center for Physical and chemical Analysis Beijing 100089 China

An alkaline precipitation method was introduced to produce hydrous cerium *** prepared powder was characterized by Brunauer-Emmett-Teller（BET） nitrogen adsorption-desorption,X-ray diffraction（XRD）,Fourier transform infrared（FTIR） spectrometry,and thermal gravimetry（TG） *** adsorbent has a chemical formula of CeO2·nH2O（n 2） and a cubic fluorite-type structure after high temperature *** capacity of different temperature treated hydrous cerium oxides does not directly correlate with BET specific surface *** adsorption isotherms follow the Langmuir equation below the treatment temperature of 800°*** adsorption causes no change on the structure of a hydrous cerium oxides,and no signs of CePO4 precipitates are *** ion-exchanging structure of hydrous cerium oxide plays a fundamental role in phosphate *** structure is highly temperature resistant and forms adsorption sites which adsorb both water and some *** loss of adsorption ability cannot be achieved unless the treatment temperature is higher than 1200°*** study shows that the adsorption of phosphates is mainly an anion-exchange process.

关键词： phosphates adsorption cerium compounds hydroxyl group ion exchange

Practical assessment of the energy density of potassium-ion batteries

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Science china Chemistry 2024年第1期67卷 4-12页

作者： liang Sun Guanjie li Shilin zhang Sailin liu Jodie Yuwono Jianfeng Mao Zaiping Guo school of chemical engineering and Advanced Materials The University of AdelaideAdelaide 5000Australia

1 Introduction The evolution of modern human society closely depends on affordable,efficient,and safe energy storage ***,lithium-ion batteries(liBs)are the dominant energy storage systems to power portable electronics... 详细信息

关键词： energy lithium smart

Highly efficient electrosynthesis of H_(2)O_(2)in acidic electrolyte on metal-free heteroatoms co-doped carbon nanosheets and simultaneously promoting Fenton process

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Chinese chemical Letters 2024年第7期35卷 514-518页

作者： Xiaodan Wang Yingnan liu Zhibin liu Zhongjian li Tao zhang Yi Cheng Lecheng Lei Bin Yang Yang Hou Key Laboratory of Biomass chemical engineering of Ministry of Education College of Chemical and Biological EngineeringZhejiang UniversityHangzhou 310058China Institute of Zhejiang university-Quzhou Quzhou 324000China Donghai Laboratory Zhoushan 316000China Ningbo Institute of Materials technology&engineering University of Chinese Academy of SciencesNingbo 315200China school of Biological and chemical engineering NingboTech UniversityNingbo 315100China Zhejiang Hengyi Petrochemical Research Institute Co. Ltd.Hangzhou 310058China

Recently electrochemical synthesis of H_(2)O_(2)through oxygen reduction reaction(ORR)via 2e^(-)pathway is considered as a green and on-site ***,it still remains a big challenge for fabricating novel metal-free catalysts under acidic solutions,since it suffers from high overpotential due to the intrinsically week*OOH ***,a co-doped carbon nanosheet(O/N–C)catalyst toward regulating O and N content was synthesized for improving the selectivity and activity of H_(2)O_(2)electrosynthesis *** O/N–C exhibits outstanding 2e-ORR performance with low onset potential of 0.4 V(***)and a selectivity of 92.4%in 0.1 mol/L HClO_(4)*** in situ electrochemical impedance spectroscopy(EIS)tests reveals that the N incorporation contributes to the fast ORR *** density functional theory(DFT)calculations demonstrate that the binding strength of*OOH was optimized by the co-doping of oxygen and nitrogen at certain content,and the O/N–C–COOH site exhibits a lower theoretical overpotential for H_(2)O_(2)formation than O–C–COOH ***,the promoted kinetics for typical organic dye degradation in simultaneous electron-Fenton process on O/N–C catalyst was demonstrated particularly for broadening its environmental application.

关键词： Oxygen reduction Metal-free catalyst H_(2)O_(2)electrosynthesis N doping Carbon materials

Cocktail effect of ionic patch driven by triboelectric nanogenerator for diabetic wound healing

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Chinese chemical Letters 2024年第8期35卷 460-465页

作者： Yixia zhang Caili Xue Yunpeng zhang Qi zhang Kai zhang Yulin liu Zhaohui Shan Wu Qiu Gang Chen Na li Hulin zhang Jiang Zhao Da-Peng Yang College of Biomedical engineering Taiyuan University of TechnologyTaiyuan 030024China College of Electronic Information and Optical engineering Taiyuan University of TechnologyTaiyuan 030024China Shanxi-Zheda Institute of Advanced Materials and chemical engineering Taiyuan 030024China College of Integrated Circuit Science and engineering Nanjing University of Posts and TelecommunicationsNanjing 210023China school of Rehabilitation Science and engineering University of Health and Rehabilitation SciencesQingdao 266024China school of Materials and chemical engineering Quanzhou Normal UniversityQuanzhou 362000China

There is increasing evidence shows that either electrical stimulation(ES)or metal ion is an effective way to accelerate ulcerative wound ***,less attention is paid to investigating the synergistic effect between ***,we explore the combined effects of ES and multiple metal ions on dia-betic wound healing assisted by a triboelectric nanogenerator(TENG).Firstly,the novel Eggshell@CuFe_(2)O_(4)nanocomposites(NCs)are prepared,which show unique structure and intrinsic antimicrobial ***,the as-prepared nanocomposites are embedded in oxidized starch hydrogel to form a mul-tifunctional composite gel,which is further assembled into a wearable ionic triboelectric nanogenerator(iTENG)patch with polydimethylsiloxane(PDMS).It can convert the mechanical energy produced by a human body motion to electric energy and mediate the sequential release of metal ions(Fe^(2+)/Ca^(2+)/Cu^(2+)),thereby resulting in the“cocktail effect”on impaired *** their effects,a satisfying healing re-sult in diabetic mouse is identified,which can effectively accelerate wound healing process by relieving inflammation,promoting angiogenesis and collagen *** work puts forward the cocktail effect of electric simulation coupled with the multiple metal ions,and opens up a new perspective in designing iTENG patch towards repair of hard-to-heal wounds.

关键词： iTENG Cocktail effect CuFe_(2)O_(4) Eggshell Diabetic wound

Reducing the vacancies associated with ferroelectric polarization to promote photocatalytic overall water splitting

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Science china Chemistry 2024年第10期67卷 3258-3264页

作者： Haozhi Qi Yuyang Kang Jian-An liu lichang Yin Wenyu zhang Shangyi Ma Jianhang Qiu lingli li Weijin Hu lianzhou Wang Gang liu Institute of Metal Research Chinese Academy of SciencesShenyang 110016China school of Materials Science and engineering University of Science and Technology of ChinaShenyang 110016China Nanomaterials Centre School of Chemical Engineering and Australian Institute for Bioengineering and NanotechnologyThe University of QueenslandSt LuciaBrisbane QLD 4072Australia

Ferroelectric materials hold great promise in photocatalytic water splitting because their built-in electric field induced by the depolarization field can fulfill the separation of photogenerated ***,a number of intrinsic charged vacancy defects are simultaneously generated to screen the depolarized field for stabilizing the crystal structure,always resulting in severe recombination of photogenerated carriers and thus poor overall water splitting ***,we proposed a strategy to promote the separation and transport of photogenerated carriers of ferroelectric photocatalysts by adjusting the ferroelectric polarization and altering the coordination environment of elements to reduce the defect ***,we prepared a series of Ta-doped PbTiO_(3)with low Pb(V_(Pb))and O(V_(O))vacancy concentrations by reducing the polarization intensity and strengthening the Pb–O *** Ta-doped PbTiO_(3)shows efficient charge separation and greatly enhanced photocatalytic overall water splitting activity with the assistance of *** work highlights the importance of regulating ferroelectric polarization and vacancy defect concentration by the doping strategy in charge separation for photocatalytic water splitting.

关键词： PbTiO_(3) ferroelectric polarization vacancy defect element doping photocatalytic overall water splitting

engineering oxygen vacancies on Tb-doped ceria supported Pt catalyst for hydrogen production through steam reforming of long-chain hydrocarbon fuels

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Chinese Journal of chemical engineering 2024年第4期68卷 181-192页

作者： Zhourong Xiao Changxuan zhang Peng li Desong Wang Xiangwen zhang li Wang Jijun Zou Guozhu li State Key Laboratory of Metastable Materials Science and technology(MMST) Hebei Key Laboratory of Applied ChemistryCollege of Environmental and Chemical EngineeringYanshan UniversityQinhuangdao 066004China Key Laboratory for Green chemical technology of Ministry of Education School of Chemical Engineering and TechnologyTianjin UniversityTianjin 300072China

Steam reforming of long-chain hydrocarbon fuels for hydrogen production has received great attention for thermal management of the hypersonic vehicle and fuel-cell *** this work,Pt catalysts supported on CeO_(2)and Tb-doped CeO_(2)were prepared by a precipitation *** physical structure and chemical properties of the as-prepared catalysts were characterized by powder X-ray diffraction,scanning electron microscopy,transmission electron microscopy,Raman spectroscopy,H_(2)temperature programmed reduction,and X-ray photoelectron *** results show that Tb-doped CeO_(2)supported Pt possesses abundant surface oxygen vacancies,good inhibition of ceria sintering,and strong metal-support interaction compared with CeO_(2)supported *** catalytic performance of hydrogen production via steam reforming of long-chain hydrocarbon fuels(n-dodecane)was *** with 2Pt/CeO_(2),2Pt/Ce_(0.9)Tb_(0.1)O_(2),and 2Pt/Ce_(0.5)Tb_(0.5)O_(2),the 2Pt/Ce_(0.7)Tb_(0.3)O_(2)has higher activity and stability for hydrogen production,on which the conversion of n-dodecane was maintained at about 53.2%after 600 min reaction under 700℃at liquid space velocity of 9 ml·g^(-1)·h^(-1).2Pt/CeO_(2)rapidly deactivated,the conversion of n-dodecane was reduced to only 41.6%after 600 min.

关键词： Steam reforming n-Dodecane Hydrogen production Pt-based catalyst Oxygen vacancy CeO_(2)

Research progress on simulation of multiscale mass transfer processes in gas-solid system by computational mass transfer

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Particuology 2024年第7期90卷 478-492页

作者： Xu li Yaohui Wang Leifu li Runye zhang Hailun Ren Wenbin li Zhongli Tang Donghui zhang The Research Center of chemical engineering School of Chemical Engineering and TechnologyTianjin UniversityTianjin 300072China The Department of chemical engineering Tianjin Renai CollegeTianjin 301636China Collaborative Innovation Center of chemical Science and engineering(Tianjin) School of Chemical Engineering and TechnologyTianjin UniversityTianjin 300072China

Particle-fluid system is one of the most popular systems in chemical *** to complex interface structure and high-velocity turbulence,the momentum and mass transfer exhibit nonlinear characteristics,which pose a great challenge for further study and *** solve this problem,computational mass transfer(CMT)emerged and has been proved to be effective in deeply exploring the mass transfer behavior of particle-fluid ***,this paper reviews recent gas-solid numerical studies of turbulence issues from empirical to theoretical,then discusses interphase mass transfer rate models and the interfacial interaction ***,the present study particularly reviews researches on mass transfer process of fixed and fluidized regime by CMT,providing reliable analysis of turbulent anisotropy diffusivity as well as multiscale structure and presenting theoretical instruction for the industrial optimization of mass transfer processes in chemical engineering.

关键词： Fixed bed Fluidized bed Computational mass transfer Turbulent mass diffusion Multiscale Anisotropy

Reaction pathways and selectivity in the chemo-catalytic conversion of cellulose and its derivatives to ethylene glycol:A review

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Chinese Journal of chemical engineering 2024年第2期66卷 310-331页

作者： Yao li Yuchun zhang Zhiyu li Huiyan zhang Peng Fu College of Agricultural engineering and Food Science Shandong University of TechnologyZibo 255000China Key Laboratory of Energy Thermal Conversion and Control Ministry of EducationSchool of Energy and EnvironmentSoutheast UniversityNanjing 210096China

Biomass-to-ethylene glycol is an effective means to achieve high-value utilisation of cellulose but is hindered by low conversion efficiency and poor catalyst activity and *** and cellobiose are derivatives of cellulose conversion to ethylene glycol,and it is found that studying the reaction process of both can help to understand the reaction mechanism of *** is desirable to develop a reusable,highly active catalyst to convert cellulose into ethylene *** ideal catalyst might have one or more active sites described the conversion steps ***,we discuss the catalyst development of celluloseto-ethylene glycol,including tungsten,tin,lanthanide,and other transition metal catalysts,and special attention is given to the reaction mechanism and kinetics for preparing ethylene glycol from cellulose,and the economic advantages of biomass-to-ethylene glycol are briefly *** insights given in this review will facilitate further development of efficient catalysts,for addressing the global energy crisis and climate change related to the use of fossil fuels.

关键词： Ethylene glycol Cellulose Catalyst Retro-aldol condensation Hydrolysis Kinetics