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Mesoporous N-incorporated carbon with Ti single atom-regulated electronic structure as high performance cathodes for Li-S batteries

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Nano Research 2025年第2期18卷 337-345页

作者： Jiafeng Hu Yunfei Xiao Zhengguang Hu Guanghao He Zhongheng Zhu Fengping Xie Li Wang Li Zuo Yong Zhao Department of Physics School of Physics and Materials ScienceNanchang UniversityNanchang 330031China National Engineering Research Center for Bioengineering Drugs and the Technologies Institute of Translational MedicineJiangxi Medical CollegeNanchang UniversityNanchang 330031China

Lithium-sulfur(Li-S)batteries are considered as strong competitors for next-generation energy storage because of their high theoretical energy ***,some challenges,such as shuttle effect of lithium polysulfides(LiPSs),volume expansion of sulfur during charge/discharge process and poor conductivity of the cathode,hindered their commercial *** this paper,an excellent sulfur host material,the titanium single atom(TiSA)-anchored mesoporous N-incorporated carbon(TiSA-NC)was successfully *** introduction of TiSAs onto the NC textures optimized their electronic structures including the charge distribution between the constituent atoms and the total density of states(TDOS)near the Fermi ***,the button battery constructed by TiSA-NC delivered impressive energy storage performance:a high reversible capacity of 1077 mAh·g^(-1) at 0.1 C;an outstanding rate capacity of 541 mAh·g^(-1) at 3 C;a superior long-term stability with a capacity fading rate of 0.053%per cycle for 500 cycles at 0.5 *** work provided an effective strategy for manufacturing high performance Li-s batteries by designing and constructing single atom catalysts.

关键词： lithium-sulfur(Li-S)battery single atoms electronic structure catalyst kinetics

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Elucidating and manipulating pressure-induced water intrusion–extrusion in tunable hydrophobic Co/Zn bimetallic ZIFs:Roles of pore size and hydrogen bond

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Nano Research 2024年第1期17卷 344-353页

作者： Diyi Fang Chuanlei Liu Yu Chen Qilong Peng Kongguo Wu Yuxiang Chen Hao Jiang Yuan Wu Benxian Shen Qiumin Wu Di Wu Hui Sun International Joint Research Center of Green Energy Chemical Engineering School of Chemical EngineeringEast China University of Science and TechnologyShanghai 200237China Alexandra Navrotsky Institute for Experimental Thermodynamics The Gene and Linda Voiland School of Chemical Engineering and BioengineeringMaterials Science and Engineeringand Department of ChemistryWashington State UniversityWashington 99163USA

Porous heterogeneous lyophobic systems(HLSs)find potential applications in energy restoring,dissipating,and ***,the development of controllable HLSs still lacks rational structure design of nanoporous materials matching the molecular sizes of adopted *** that,thoroughly understanding the underlying transportation mechanism in the confined nano channels is greatly *** this work,a series of Co/Zn bimetallic zeolitic imidazolate frameworks(ZIFs)with tunable structures were synthesized via regulating the Co to Zn ratios and employed to investigate the intrusion–extrusion of liquid water in confined *** characterizations confirm the heterometallic coordination in the Co/Zn-doped *** intrusion–extrusion experiments unlock the relationship between the intrusion pressure and the nanopore size and realize the evolution of the HLSs between molecular spring and *** addition,cycling tests indicate the reversible structure change of Co/Zn ZIFs encountering pressure-induced water *** combination with molecular dynamics simulations,we present that the water multimers intrude into nanopores of ZIFs in chain-like forms along with dissociation of hydrogen bonds(HBs).Water molecules in the pre-intrusion state exhibit reduced HBs in response to the increase of pressure and linear structure with 1.6–3.0 HBs on *** transition to the post-intrusion situation,the associative configuration of water tends to exhibit the tetrahedral ***,we highlight the roles of pore size and HB in synergically dominating the pressure-induced intrusion–extrusion of liquid water in hydrophobic ***,the present work can also guide the development of functional guest–host systems based on porous architectures.

关键词： heterometallic zeolitic imidazolate frameworks nanopore intrusion hydrogen bonds

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Perovskite Oxides Toward Oxygen Evolution Reaction:Intellectual Design Strategies,Properties and Perspectives

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Electrochemical Energy Reviews 2024年第1期7卷 447-483页

作者： Lin-Bo Liu Chenxing Yi Hong-Cheng Mi Song Lin Zhang Xian-Zhu Fu Jing-Li Luo Subiao Liu School of Minerals Processing and Bioengineering Central South UniversityChangsha 410083HunanChina Institute of Materials Research and Engineering Agency for ScienceTechnology and Research2 Fusionopolis WayInnovis#08-03Singapore 138634Singapore College of Materials Science and Engineering Shenzhen UniversityShenzhen 518000China Department of Chemical and Materials Engineering University of AlbertaEdmontonAB T6G 1H9Canada

Developing electrochemical energy storage and conversion devices(e.g.,water splitting,regenerative fuel cells and rechargeable metal-air batteries)driven by intermittent renewable energy sources holds a great potential to facilitate global energy transition and alleviate the associated environmental ***,the involved kinetically sluggish oxygen evolution reaction(OER)severely limits the entire reaction efficiency,thus designing high-performance materials toward efficient OER is of prime significance to remove this *** various materials,cost-effective perovskite oxides have drawn particular attention due to their desirable catalytic activity,excellent stability and large *** date,substantial efforts have been dedicated with varying degrees of success to promoting OER on perovskite oxides,which have generated multiple reviews from various perspectives,e.g.,electronic structure modulation and heteroatom doping and various ***,the reviews that comprehensively and systematically focus on the latest intellectual design strategies of perovskite oxides toward efficient OER are quite *** bridge the gap,this review thus emphatically concentrates on this very topic with broader coverages,more comparative discussions and deeper insights into the synthetic modulation,doping,surface engineering,structure mutation and *** specifically,this review elucidates,in details,the underlying causality between the being-tuned physiochemical properties[e.g.,electronic structure,metal-oxygen(M-O)bonding configuration,adsorption capacity of oxygenated species and electrical conductivity]of the intellectually designed perovskite oxides and the resulting OER performances,coupled with perspectives and potential challenges on future *** is our sincere hope for this review to provide the scientific community with more insights for developing advanced perovskite oxides with high OER catalytic efficiency and further stimulate m

关键词： Perovskite oxides Oxygen evolution reaction Synthetic modulation Doping Surface engineering Structure mutation Hybrids

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Advancing optothermal manipulation:decoupling temperature and flow fields in quasi-isothermal microscale streaming

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Light(science & Applications) 2023年第9期12卷 1713-1714页

作者： Youngsun Kim Yuebing Zheng Materials Science and Engineering Program and Texas Materials Institute The University of Texas at AustinAustinTX78712USA Walker Department of Mechanical Engineering The University of Texas at AustinAustinTX78712USA

By decoupling temperature and flow fields through symmetry-correlated laser scan sequences,ISO-FLUCS enables quasi-isothermal optofluidic microscale *** technique offers precise control over fluid manipulation while m... 详细信息

关键词： thermal isothermal flow

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Surface-modified Ag@Ru-P25 for photocatalytic CO_(2) conversion with high selectivity over CH_(4) formation at the solid–gas interface

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Carbon Energy 2024年第1期6卷 182-196页

作者： Chaitanya B.Hiragond Sohag Biswas Niket SPowar Junho Lee Eunhee Gong Hwapyong Kim Hong Soo Kim Jin-Woo Jung Chang-Hee Cho Bryan M.Wong Su-Il In Department of Energy Science&Engineering Daegu Gyeongbuk Institute of Science and Technology(DGIST)DaeguRepublic of Korea Department of Chemical&Environmental Engineering Materials Science&Engineering ProgramDepartment of ChemistryDepartment of Physics&AstronomyUniversity of California-RiversideRiversideCaliforniaUSA Department of Physics and Chemistry Daegu Gyeongbuk Institute of Science and Technology(DGIST)DaeguRepublic of Korea NiceScience Corporation DaeguRepublic of Korea

Systematic optimization of the photocatalyst and investigation of the role of each component is important to maximizing catalytic activity and comprehending the photocatalytic conversion of CO_(2) reduction to solar fuels.A surface-modified Ag@Ru-P25 photocatalyst with H_(2)O_(2) treatment was designed in this study to convert CO_(2) and H_(2)O vapor into highly selective *** doping followed by Ag nanoparticles(NPs)cocatalyst deposition on P25(TiO_(2))enhances visible light absorption and charge separation,whereas H_(2)O_(2) treatment modifies the surface of the photocatalyst with hydroxyl(–OH)groups and promotes CO_(2) ***-resonance transmission electron microscopy,X-ray photoelectron spectroscopy,X-ray absorption near-edge structure,and extended X-ray absorption fine structure techniques were used to analyze the surface and chemical composition of the photocatalyst,while thermogravimetric analysis,CO_(2) adsorption isotherm,and temperature programmed desorption study were performed to examine the significance of H_(2)O_(2) treatment in increasing CO_(2) reduction *** optimized Ag1.0@Ru1.0-P25 photocatalyst performed excellent CO_(2) reduction activity into CO,CH4,and C2H6 with a~95%selectivity of CH4,where the activity was~135 times higher than that of pristine TiO_(2)(P25).For the first time,this work explored the effect of H_(2)O_(2) treatment on the photocatalyst that dramatically increases CO_(2) reduction activity.

关键词： gas-phase CO_(2) reduction H_(2)O_(2) treatment plasmonic nanoparticles solar fuel photocatalyst surface modification

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Organic Radical-Boosted Ionic Conductivity in Redox Polymer Electrolyte for Advanced Fiber-Shaped Energy Storage Devices

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Nano-Micro Letters 2025年第8期17卷 202-218页

作者： Jeong-Gil Kim Jaehyoung Ko Hyung-Kyu Lim Yerin Jo Hayoung Yu Min Woo Kim Min Ji Kim Hyeon Su Jeong Jinwoo Lee Yongho Joo Nam Dong Kim Institute of Advanced Composite Materials Korea Institute of Science and Technology92 Chudong-roBongdong-eupWanju-gunJeollabuk-do 55324Republic of Korea Department of Chemical and Biomolecular Engineering Korea Advanced Institute of Science and Technology291 Daehak-roYuseong-guDaejeon 34141Republic of Korea Division of Chemical and Bioengineering Kangwon National UniversityChuncheon 24341Republic of Korea Department of Materials Science and Engineering Gwangju Institute of Science and TechnologyGwangju 61005Republic of Korea

Fiber-shaped energy storage devices(FSESDs)with exceptional flexibility for wearable power sources should be applied with solid electrolytes over liquid electrolytes due to short circuits and leakage issue during *** the solid options,polymer electrolytes are particularly preferred due to their robustness and flexibility,although their low ionic conductivity remains a significant ***,we present a redox polymer electrolyte(HT_RPE)with 4-hydroxy-2,2,6,6-tetramethylpiperidine-1-oxyl(HT)as a multi-functional *** acts as a plasticizer that transforms the glassy state into the rubbery state for improved chain mobility and provides distinctive ion conduction pathway by the self-exchange reaction between radical and oxidized *** synergetic effects lead to high ionic conductivity(73.5 mS cm−1)based on a lower activation energy of 0.13 eV than other redox ***,HT_RPE with a pseudocapacitive characteristic by HT enables an outstanding electrochemical performance of the symmetric FSESDs using carbon-based fiber electrodes(energy density of 25.4 W h kg^(−1) at a power density of 25,000 W kg^(−1))without typical active materials,along with excellent stability(capacitance retention of 91.2%after 8,000 bending cycles).This work highlights a versatile HT_RPE that utilizes the unique functionality of HT for both the high ionic conductivity and improved energy storage capability,providing a promising pathway for next-generation flexible energy storage devices.

关键词： Redox polymer electrolyte Hydroxy-TEMPO Ionic conductivity Self-exchange reaction Fiber-shaped energy storage devices

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Temperature-dependent microstructural evolution in a compositionally complex solid electrolyte:The role of a grain boundary transition

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Journal of Advanced Ceramics 2025年第3期14卷 163-176页

作者： Shu-Ting Ko Chaojie Du Huiming Guo Hasti Vahidi Jenna L.Wardini Tom Lee Yi Liu Jingjing Yang Francisco Guzman Timothy J.Rupert William J.Bowman Shen J.Dillon Xiaoqing Pan Jian Luo Aiiso Yufeng Li Family Department of Chemical and Nano Engineering University of California San DiegoLa JollaCalifornia 92093USA Program in Materials Science and Engineering University of California San DiegoLa JollaCalifornia 92093USA Department of Materials Science and Engineering University of California IrvineIrvineCalifornia 92697USA Department of Physics and Astronomy University of California IrvineIrvineCalifornia 92697USA Irvine Materials Research Institute University of California IrvineIrvineCalifornia 92697USA

Compositionally complex solid electrolyte(Li_(0.375)Sr_(0.4375))(Ta_(0.375)Nb_(0.375)Zr_(0.125)Hf_(0.125))O_(3)(LSTNZH)samples are synthesized using different sintering temperatures,durations,and cooling conditions(furnace cooling(FC)*** quenching(AQ)).The temperature-dependent grain growth has been examined to investigate the microstructural evolution and the origin of exaggerated(abnormal)grain *** moderate temperatures,the grain growth of LSTNZH follows a cubic root growth model with an Arrhenius temperature *** increasing temperature,bimodal microstructures develop,and the Arrhenius temperature dependence breaks ***,increasing the temperature induces increased Nb segregation at general grain boundaries(GBs),in contrast to classical GB segregation models but suggesting premelting-like GB disordering,which can explain the observed abnormal grain growth(AGG).In addition,the large grains become faceted with increasing temperature,which occurs concurrently with the temperature-induced transitions in GB segregation and grain growth,thereby further supporting the occurrence of a GB phase-like(complexion)*** impacts on the densification,ionic conductivity,and hardness are also *** work provides a new insight into the fundamental understanding of the grain growth mechanisms of the emergent class of medium-and high-entropy compositionally complex ceramics(CCCs),which is essential for tailoring microstructures and material properties.

关键词： compositionally complex ceramics(CCCs) solid electrolytes perovskite grain growth grain boundary(GB) electron backscatter diffraction(EBSD)

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Recent advances in tip-enhanced Raman spectroscopy probe designs

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Nano Research 2023年第4期16卷 5555-5571页

作者： Da Xu Boqun Liang Yaodong Xu Ming Liu Department of Electrical and Computer Engineering University of California-RiversideRiversideCalifornia 92521USA Materials Science and Engineering program University of California-RiversideRiversideCalifornia 92521USA

Tip-enhanced Raman spectroscopy(TERS)imaging is a super-resolution imaging technique that features the merits of both surface-enhanced Raman spectroscopy(SERS)and scanning probe microscopy(SPM),such as the high chemical sensitivity from the former and the nanoscale spatial resolution from the *** advantages make TERS an essential nanospectroscopic characterization technique for chemical analysis,materials science,bio-sensing,*** probes,the most critical factor determining the TERS imaging quality,are expected to provide a highly confined electromagnetic hotspot with a minimized scattering background for the generation of Raman signals with high spatial *** two decades of development,numerous probe design concepts have been proposed and *** review provides a comprehensive overview of the state-of-the-art TERS probe designs,from the working mechanism to the practical *** start with reviewing the recent development of TERS configurations and the corresponding working mechanisms,including the SPM platforms,optical excitation/collection techniques,and probe preparation *** then review the emerging novel TERS probe designs,including the remote-excitation probes,the waveguide-based nanofocusing probes,the metal-coated nanofocusing probes,the nanowire-assisted selective-coupling probes,and the tapered metal-insulator-metal *** discussion focuses on a few critical aspects,including the surface-plasmon-polariton(SPP)hotspot excitation technique,conversion efficiency,working frequency,and *** the end,we review the latest TERS applications and give a perspective on the future of TERS.

关键词： tip-enhanced Raman spectroscopy plasmonics scanning probe microscopy nanoscale imaging nanophotonics nanofocusing

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Computing grain boundary“phase”diagrams

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Interdisciplinary materials 2023年第1期2卷 137-160页

作者： Jian Luo Department of Nanoengineering Program of Materials Science and EngineeringUniversity of California San DiegoLa JollaCaliforniaUSA

Grain boundaries(GBs)can be treated as two-dimensional(2-D)interfacial phases(also called“complexions”)that can undergo interfacial phase-like *** bulk phase diagrams and calculation of phase diagram(CALPHAD)methods serve as a foundation for modern materials science,we propose to extend them to GBs to have equally significant *** perspective article reviews a series of studies to compute the GB counterparts to bulk phase ***,a phenomenological interfacial thermodynamic model was developed to construct GB lambda diagrams to forecast high-temperature GB disordering and related trends in sintering and other properties for both metallic and ceramic *** parallel,an Ising-type lattice statistical thermodynamic model was utilized to construct GB adsorption(segregation)diagrams,which predicted first-order GB adsorption transitions and critical *** two simplified thermodynamic models emphasize the GB structural(disordering)and chemical(adsorption)aspects,***,hybrid Monte Carlo and molecular dynamics atomistic simulations were used to compute more rigorous and accurate GB“phase”*** GB diagrams of thermodynamic and structural properties were further extended to include mechanical ***,machine learning algorithms were combined with atomistic simulations to predict GB properties as functions of four independent compositional variables and temperature in a 5-D space for a given GB in high-entropy alloys or as functions of five GB macroscopic(crystallographic)degrees of freedom plus temperature and composition for a binary alloy in a 7-D *** relevant studies are also *** perspective and outlook,including two emerging fields of high-entropy grain boundaries(HEGBs)and electrically(or electrochemically)induced GB transitions,are discussed.

关键词： CALPHAD grain boundary interfacial transition phase diagram

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In vitro and in vivo degradation,biocompatibility and bone repair performance of strontium-doped montmorillonite coating on Mg-Ca alloy

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Regenerative Biomaterials 2024年第5期3卷 74-89页

作者： Wenxin Sun Kaining Yang Yuhong Zou Yande Ren Lin Zhang Fen Zhang Rongchang Zeng Department of Bioengineering College of Chemical and Biological EngineeringShandong University of Science and TechnologyQingdao 266590China Affiliated Hospital of Medical College Qingdao University Qingdao 266555China Hospital of Shandong University of Science and TechnologyQingdao 266590China Corrosion Laboratory for Light Metals College of Materials Science and EngineeringShandong University of Science and TechnologyQingdao 266590China

Poor bone growth remains a challenge for degradable bone *** and strontium were selected as the carrier and bone growth promoting elements to prepare strontium-doped montmorillonite coating on Mg-Ca *** surface morphology and composition were characterized by SEM,EDS,XPS,FT-IR and *** hydrogen evolution experiment and electrochemical test results showed that the Mg-Ca alloy coated with Sr-MMT coating possessed optimal corrosion resistance ***,in vitro studies on cell activity,ALP activity,and cell morphology confirmed that Sr-MMT coating had satisfactory biocompatibility,which can significantly avail the proliferation,differentiation,and adhesion of ***,the results of the 90-day implantation experiment in rats indicated that,the preparation of Sr-MMT coating effectively advanced the biocompatibility and bone repair performance of Mg-Ca *** addition,The Osteogenic ability of Sr-MMT coating may be due to the combined effect of the precipitation of Si4+and Sr^(2+)in Sr-MMT coating and the dissolution of Mg^(2+)and Ca^(2+)during the degradation of Mg-Ca *** using coating technology,this study provides a late-model strategy for biodegradable Mg alloys with good corrosion resistance,*** new material will bring more possibilities in bone repair.

关键词： Mg-Ca alloy montmorillonite strontium corrosion resistance biocompatibility osteogenesis

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