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Thermal Stress Behavior of Diffusion-bonded SiC/6061Al Laminates during Thermal Cycling

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Journal of Materials Science & Technology 1999年第2期15卷 117-120页

作者： li, Huan li, jiabao Wang, Zhongguang Jiang, Chuanhai Wang, Dezun Acad Sinica Inst Met Res State Key Lab Fatigue & Fracture Mat Shenyang 110015 Peoples R China Harbin Inst Technol Sch Mat Sci & Engn Harbin 150001 Peoples R China

In addition to the study of thermal stress behavior, the stress relaxation at elevated temperature (205 degree C) was also investigated by means of X-ray diffraction. It was found that the elastic and elastoplastic deformation in the 6061 Al layer takes place during thermal cycling, and the same closed stress temperature loop is formed in the second cycling for the aged and low temperature treated specimen. Meanwhile, it was demonstrated that the compressive stress relaxed in 6061 Al layer at 205 degree C within the range of 0.5-16 h, and which is nearly unchanged with further prolongation of time. (Edited author abstract) 19 Refs.

关键词： Laminates

Boosted electrochemical performance of Na_(3)V_(2)(PO_(4))_(3) at low temperature through synergistical F substitution and construction of interconnected nitrogen-doped carbonaceous network

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Journal of Materials Science & Technology 2023年第19期150卷 159-167页

作者： jiabao li Ziqian li Shaocong Tang Tianyi Wang likun Pan Chengyin Wang School of Chemistry and Chemical Engineering Yangzhou University180 Si-Wang-Ting RoadYangzhouJiangsu 225002China Shanghai key laboratory of Magnetic Resonance School of Physics and Electronic ScienceEast China Normal UniversityShanghai 200062China

Benefitting from its unique NASICON-type framework,the Na_(3)V_(2)(PO_(4))_(3)(NVP)cathodes have aroused extensive interest and have been deemed as the promising cathode candidate for sodium-ion batteries(SIBs).Unfortunately,the poor electronic conductivity,combined with the undesirable volume variations,seriously hinders the practical application of NVP cathode,especially at low ***,a dual-strategy,F substitution accompanied by V vacancies and the construction of three-dimensional(3D)nitrogen-doped carbonaceous frameworks(NC),were employed for the NVP cathode(F-NVP/C@3DNC).The former can remarkably decrease the particle size and enhance Na^(+)migration capability,increasing the ionic ***,the electronic connection and effective buffering can be obtained from the latter,strengthening the electrode ***,up to 100 cycles at 0.1 A g^(-1),a reversible capacity of 113.8 mAh g^(-1),approaching the theoretical value(117 mAh g^(-1)),is demonstrated,accompa-nied by impressive capacity retentions at 1.0(93.75%after 4800 cycles)and 20.0 A g^(-1)(92.7%after 1000 cycles).More importantly,even at-20℃,a superior specific capacity(102.6 mAh g^(-1) after 100 cycles at 0.1 A g^(-1))and high capacity retention(86.6%at 20.0 A g^(-1) up to 1000 cycles)can still be obtained ***,the design of F-NVP/C@3DNC provides insights for the fabrication of polyanion cathodes for applications at low temperatures with modified structure stability and reaction kinetics.

关键词： Na_(3)V_(2)(PO_(4))_(3) F substitution Interconnected carbonaceous frameworks Ionic/electronic conductivity Performance at low temperature

Identification of unknown disinfection byproducts in drinking water produced from Taihu Lake source water

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Journal of Environmental Sciences 2022年第3期34卷 1-11页

作者： jiabao li Haifeng Zhang Juan Wang Zhiyong Yu Hongyan li Min Yang Key Laboratory of Drinking Water Science and Technology Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China State Key Laboratory of Environmental Aquatic Chemistry Research Center for Eco-Environmental SciencesUniversity of Chinese Academy of SciencesBeijing 100049China University of Chinese Academy of Sciences Beijing 100049China

Although disinfection byproducts(DBPs) in drinking water have been suggested as a cancer causing factor, the causative compounds have not yet been clarified. In this study, we used liquid chromatography quadrupole-time-of-flight spectrometry(LC-QTOF MS) to identify the unknown disinfection byproducts(DBPs) in drinking water produced from Taihu Lake source water, which is known as a convergence point for the anthropogenic pollutants discharged from intensive industrial activities in the surrounding regions. In total, 91 formulas of DBPs were discovered through LC-QTOF MS nontarget screen, 81 of which have not yet been reported. Among the 91 molecules, 56 only contain bromine, 15 only contain chlorine and 20 DBPs have both bromine and chlorine atoms. Finally, five DBPs including 2,4,6-tribromophenol, 2,6-dibromo-4-chlorophenol, 2,6-dichloro-4-bromophenol, 4-bromo-2,6-di-tert-butylphenol and 3,6-dibromocarbazole were confirmed using standards. The former three compounds mainly formed in the predisinfection step(maximum concentration, 0.2-2.6 μg/L), while the latter two formed in the disinfection step(maximum concentration, 18.2-33.6 ng/L). In addition, 19 possible precursors of the discovered DBPs were detected, with the aromatic compounds being a major group. 2,6-di-tert-butylphenol as the precursor of 4-bromo-2,6-di-tert-butylphenol was confirmed with standard, with a concentration of 20.3 μg/L in raw water. The results of this study show that brominated DBPs which are possibly formed from industrial pollutants are relevant DBP species in drinking water produced form Taihu source water, suggesting protection of Taihu Lake source water is important to control the DBP risks.

关键词： Source water Disinfection byproducts Brominated disinfection byproducts Nontarget analysis Precursors Source water pollution

In-situ electro-polymerization of L-tyrosine enables ultrafast,long cycle life for lithium metal battery

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Chinese Chemical Letters 2023年第5期34卷 561-566页

作者： Zihao Chu Sidong Zhuang Jiahui Lu jiabao li Chengyin Wang Tianyi Wang College of Chemistry and Chemical Engineering Yangzhou UniversityYangzhou 225002China

The growth of dendrites in the lithium(li)metal anode hinders the commercialization of lithium metal batteries(LMBs).Electrolyte additives have proved to be an effective way to solve the problem of dendrites and improve the coulombic ***,we propose a strategy of using L-tyrosine(L-Tyr)as an additive to protect the lithium metal anode in situ,where L-Tyr can be electropolymerized in situ to form an ordered array of nanosheets on the surface of the lithium metal anode to uniformly deposit lithium *** the same time,the addition of L-Tyr changed the structure of the solvent in the electrolyte,because the carboxyl group on L-Tyr make DME form hydrogen bonds ***,the reduction of free DME makes more TFSI-involved in the formation of the SEI film on the electrode surface,which increases the proportion of liF in the SEI *** 2 wt%L-Tyr,li||li symmetric cells superior cycle stability in ether electrolytes,li|Cu cells y improved stability up to 200 cycles with an average CE of 93.1%in ether electrolytes and li||li_(4)Ti_(5)O_(12)(LTO)demonstrated an excellent cycling capabilitie with 119 mAh/g capacity retention by the 5000^(th)cycle.

关键词： lithium metal battery Tyrosine In situ Eelectropolymerization lithium dendrite

Interface Engineering of Fe_(7)S_(8)/FeS_(2) Heterostructure in situ Encapsulated into Nitrogen‑Doped Carbon Nanotubes for High Power Sodium‑Ion Batteries

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Nano-Micro Letters 2023年第8期15卷 167-180页

作者： Penghao Song Jian Yang Chengyin Wang Tianyi Wang Hong Gao Guoxiu Wang jiabao li College of Chemistry and Chemical Engineering Yangzhou University180 Si‑Wang‑Ting RoadYangzhou 225002JiangsuPeople’s Republic of China Centre for Clean Energy Technology Faculty of ScienceUniversity of Technology SydneyPO Box 123BroadwayNSW 2007Australia Key Lab of Fluorine and Silicon for Energy Materials and Chemistry of Ministry of Education College of Chemistry and Chemical EngineeringJiangxi Normal UniversityNanchang 330022People’s Republic of China

Heterostructure engineering combined with carbonaceous materials shows great promise toward promoting sluggish kinetics,improving electronic conductivity,and mitigating the huge expansion of transition metal sulfide electrodes for high-performance sodium ***,the iron sulfide-based heterostructures in situ hybridized with nitrogen-doped carbon nanotubes(Fe_(7)S_(8)/FeS_(2)/NCNT)have been prepared through a successive pyrolysis and sulfidation *** Fe_(7)S_(8)/FeS_(2)/NCNT heterostructure delivered a high reversible capacity of 403.2 mAh g^(−1) up to 100 cycles at 1.0 A g^(−1) and superior rate capability(273.4 mAh g^(−1) at 20.0 A g^(−1))in ester-based ***,the electrodes also demonstrated long-term cycling stability(466.7 mAh g^(−1) after 1,000 cycles at 5.0 A g^(−1))and outstanding rate capability(536.5 mAh g^(−1) at 20.0 A g^(−1))in ether-based *** outstanding performance could be mainly attributed to the fast sodium-ion diffusion kinetics,high capacitive contribution,and convenient interfacial dynamics in ether-based electrolyte.

关键词： Iron sulfides Heterostructure Nitrogen-doped carbon nanotubes Ester-based electrolyte Ether-based electrolyte

Flexible sodium-ion capacitors boosted by high electrochemicallyreactive and structurally-stable Sb_(2)S_(3)nanowire/Ti_(3)C_(2)Tx MXene film anodes

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Nano Research 2023年第4期16卷 5592-5600页

作者： Jian Yang Tianyi Wang Xin Guo Xiaoxue Sheng jiabao li Chengyin Wang Guoxiu Wang Institute for Innovative Materials and Energy Faculty of Chemistry and Chemical EngineeringYangzhou UniversityYangzhou 225002China Centre for Clean Energy Technology School of Mathematics and PhysicsFaculty of ScienceUniversity of Technology SydneySydneyNSW 2007Australia

The rapid development of portable,foldable,and wearable electronic devices requires flexible energy storage *** capacitors(SICs)combining the high energy of batteries and the high power of supercapacitors are promising ***,the lack of flexible and durable electrode materials that allow fast and reversible Na+storage hinders the development of flexible ***,we report a high-capacity,free-standing and flexible Sb2S3/Ti_(3)C_(2)Tx composite film for fast and stable sodium *** this hybrid nano-architecture,the Sb_(2)S_(3)nanowires uniformly anchored between Ti_(3)C_(2)Tx nanosheets not only act as sodium storage reservoirs but also pillar the two-dimensional(2D)Ti_(3)C_(2)Tx to form three-dimensional(3D)channels benefiting for electrolyte ***,the highly conductive Ti_(3)C_(2)Tx nanosheets provide rapid electron transport pathways,confine the volume expansion of Sb_(2)S_(3)during sodiation,and restrain the dissolution of discharged sodium polysulfides through physical constraint and chemical *** to the synergistic effects of the one-dimensional(1D)Sb_(2)S_(3)nanowires and 2D MXenes,the resultant composite anodes exhibit outstanding rate performance(553 mAh·g−1 at 2 A·g−1)and cycle stability in sodium-ion ***,the flexible SICs using Sb2S3/Ti_(3)C_(2)Tx anodes and active carbon/reduced graphene oxide(AC/rGO)paper cathodes deliver a superior energy and power density in comparison with previously reported devices,as well as an excellent cycling performance with a high capacity retention of 82.78%after 5,000 *** work sheds light on the design of next-generation low-cost,flexible and fast-charging energy storage devices.

关键词： MXene Sb_(2)S_(3)nanowires flexible energy storage devices sodium-ion batteries sodium-ion capacitors

Interfacial built-in electric field and crosslinking pathways enabling WS_(2)/Ti_(3)C_(2)T_(x) heterojunction with robust sodium storage at low temperature

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Journal of Energy Chemistry 2024年第2期89卷 635-645,I0014页

作者： jiabao li Shaocong Tang Jingjing Hao Quan Yuan Tianyi Wang likun Pan Jinliang li Shenbo Yang Chengyin Wang College of Chemistry and Chemical Engineering Yangzhou UniversityYangzhou 225002JiangsuChina Shanghai Key Laboratory of Magnetic Resonance School of Physics and Electronic Science East China Normal UniversityShanghai 200241China Siyuan Laboratory Guangdong Provincial Engineering Technology Research Center of Vacuum Coating Technologies and New Energy MaterialsGuangdong Provincial Key Laboratory of Nanophotonic ManipulationDepartment of PhysicsJinan UniversityGuangzhou 510632GuangdongChina Hongzhiwei Technology(Shanghai)CO.LTD Shanghai 200241China

Developing efficient energy storage for sodium-ion batteries(SIBs)by creating high-performance heterojunctions and understanding their interfacial interaction at the atomic/molecular level holds promise but is also ***,sluggish reaction kinetics at low temperatures restrict the operation of SIBs in cold ***,cross-linking nanoarchitectonics of WS_(2)/Ti_(3)C_(2)T_(x) heterojunction,featuring built-in electric field(BIEF),have been developed,employing as a model to reveal the positive effect of heterojunction design and BIEF for modifying the reaction kinetics and electrochemical ***,the theoretical analysis manifests the discrepancy in work functions leads to the electronic flow from the electron-rich Ti_(3)C_(2)T_(x) to layered WS_(2),spontaneously forming the BIEF and“ion reservoir”at the heterogeneous ***,the generation of cross-linking pathways further promotes the transportation of electrons/ions,which guarantees rapid diffusion kinetics and excellent structure ***,superior sodium storage performance is obtained for the WS_(2)/Ti_(3)C_(2)T_(x) heterojunction,with only 0.2%decay per cycle at 5.0 A g^(-1)(25℃)up to 1000 cycles and a high capacity of 293.5 mA h g^(-1)(0.1A g^(-1)after 100 cycles)even at-20℃.Importantly,the spontaneously formed BIEF,accompanied by“ion reservoir”,in heterojunction provides deep understandings of the correlation between structure fabricated and performance obtained.

关键词： WS_(2)/Ti_(3)C_(2)T_(x)heterojunction Built-in electric field Ion reservoir Reaction kinetics Sodium storage performance at low temperature

Three-dimensional crosslinked nanoarchitectonics of CoP@NC anchored on Ti_(3)C_(2)T_(x) with high ionic diffusion and enhanced sodium storage performance

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Journal of Materiomics 2023年第6期9卷 1185-1195页

作者： Zhihao Gu jiabao li Penghao Song Yu Wang Jian Yang Tianyi Wang Chengyin Wang School of Chemistry and Chemical Engineering Yangzhou University180 Si-Wang-Ting RoadYangzhou225002JiangsuChina

Transition metal phosphides(CoP,etc.),featuring rich natural abundance and remarkable theoretical capacity,suffer from extremely poor rate capability and severe energy decay for sodium storage due to their huge volume change and low electronic ***,an elaborate hierarchical superstructure,nitrogen-doped carbon wrapped CoP in-situ anchored on Ti_(3)C_(2)Tx MXene(CoP@NC/Ti_(3)C_(2)Tx),was fabricated by crosslinking ZIF-67 on Ti_(3)C_(2)Tx flakes followed by successive carbonization and *** principle,the dual modification for CoP nanoparticles through NC coating and Ti_(3)C_(2)T_(x) support can dramatically accelerate the ionic/electronic transportation and alleviate the structure change upon repeated sodiation/desodiation,thus leading to superior electrode integrity,modified ohmic polarization,and excellent electrochemical ***,the elaborated hierarchical superstructure delivers impressive sodium storage performances with large capacity(396.06 mA·h/g at 0.1 A/g up to 100 cycles),robust rate performance(237.8 mA·h/g at 2.0 A/g),and satisfied cyclability(capacity retention of 81.3%at 1.0 A/g after 1,200 cycles).In principle,systematic electrochemical and characterizations measurements manifest that the high pseudocapacitive effect to charge storage,enhanced ionic diffusion kinetics,and remarkable electrochemical reversibility contribute to the impressive sodium storage performance of target CoP@NC/Ti_(3)C_(2)T_(x).Importantly,the unique modification strategy reported in this study paves a way to fabricate high-performance electrode for SIBs.

关键词： CoP ZIF-67 Ti_(3)C_(2)T_(x) High-performance Sodium-ion battery

A METHOD FOR CORRECTING INTENSITY IN CONTINU-OUS SCANNING X-RAY STRESS MEASUREMENT

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Acta Metallurgica Sinica(English Letters) 1992年第12期5卷 457-461页

作者： li jiabao HANG Zengqiao National Laboratory for Fatigue and Fracture of Materials,Institute of Metal Research,Academia Simca.Shenyang,China HE Jiawen Xi’an Jiaotong University,Xi’an,China Inst of Metal Research Acad Sinica Shenyang China

A set of absorption curves was priorly prepared on transparent films to fit the background and peak intensities in continuous scanning X-ray stress *** may be better to correct both background and absorption of pure d... 详细信息

关键词： X-ray diffraction stress measurement intensity correction peak location