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Insights into ionic association boosting water oxidation activity and dynamic stability

Journal of Energy Chemistry 2024年第2期89卷 99-109,I0004页

作者： Zanling Huang Shuqi Zhu Yuan Duan Chaoran Pi Xuming Zhang Abebe Reda Woldu Jing-Xin Jian Paul K.Chu Qing-Xiao Tong Liangsheng Hu Xiangdong Yao Department of Chemistry and Key Laboratory for Preparation and Application of Ordered Structural Materials of Guangdong Province Shantou UniversityShantou 515063GuangdongChina Chemistry and Chemical Engineering Guangdong Laboratory Shantou 515063GuangdongChina State Key Laboratory of Refractories and Metallurgy and Institute of Advanced Materials and Nanotechnology Wuhan University of Science and TechnologyWuhan 430081HubeiChina Department of Physics Department of Materials Science and Engineeringand Department of Biomedical EngineeringCity University of Hong KongTat Chee AvenueKowloonHong KongChina School of Advanced Energy Sun Yat-sen University(Shenzhen)Shenzhen 518107GuangdongChina

There have been reports about Fe ions boosting oxygen evolution reaction(OER)activity of Ni-based catalysts in alkaline conditions,while the origin and reason for the enhancement remains ***,we attempt to identify the activity improvement and discover that Ni sites act as a host to attract Fe(Ⅲ)to form Fe(Ni)(Ⅲ)binary centres,which serve as the dynamic sites to promote OER activity and stability by cyclical formation of intermediates(Fe(Ⅲ)→Fe(Ni)(Ⅲ)→Fe(Ni)-OH→Fe(Ni)-O→Fe(Ni)OOH→Fe(Ⅲ))at the electrode/electrolyte interface to emit O_(2).Additionally,some ions(Co(Ⅱ),Ni(Ⅱ),and Cr(Ⅲ))can also be the active sites to catalyze the OER process on a variety of *** Fe(Ⅲ)-catalyzed overall water-splitting electrolyzer comprising bare Ni foam as the anode and Pt/Ni-Mo as the cathode demonstrates robust stability for 1600 h at 1000 mA cm^(-2)@~1.75 *** results provide insights into the ioncatalyzed effects boosting OER performance.

关键词： Oxygen evolution reaction Fe(Ⅲ)-catalysis Ni-Fe binary active centers Ion-catalyzed effects Robust stability

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Tetramethylammonium Iodide Additive for Enhancing the Charge Carrier Mobilities of Diketopyrrolopyrrole-Based Conju-gated Polymer in Ambipolar Organic Field-Effect Transistors

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Chinese Journal of Chemistry 2023年第9期41卷 1028-1036页

作者： Waner He Qian Liu Sultan Otep Hidetoshi Matsumoto Sergei Manzhos Prashant Sonar Aung Ko Ko Kyaw Tsuyoshi Michinobu Department of Materials Science and Engineering Tokyo Institute of TechnologyTokyo 152-8552Japan Guangdong University Key Laboratory for Advanced Quantum Dot Displays Department of Electrical and Electronic EngineeringSouthern University of Science and TechnologyShenzhenGuangdong 518055China Center for Materials Science School of Chemistry and PhysicsFaculty of ScienceQueensland University of TechnologyBrisbaneQLD 4000Australia School of Materials and Chemical Technology Tokyo Institute of TechnologyTokyo 152-8552Japan

Diketopyrrolopyrrole(DPP)is one of the most promising building blocks for constructing polymer semiconductors with high charge-carrier mobilities in organic field-effect transistors(OFETs).In this study,a novel DPP-based conjugated polymer,PDPPy-BDD,was designed and *** ambipolar field-effect transistor characteristics were realized with the average hole and electron mobilities of 3.5×10^(-3)and 3.07×10^(-2)cm^(2)V^(-1)s^(-1),*** the hole and electron mobilities could be successfully en-hanced by using a tetramethylammonium iodide(NMe4l)*** an enhancement was attributed to the formation of stronger interchainπ-πstackings,the weakening of the face-on packing orientation in the thin film state,and the higher channel conductivi-ties in the OFETs.

关键词： Diketopyrrolopyrrole Pyridine Charge transport Conjugated polymers Organic field-effect transistors Semiconductors Tetramethylammonium iodide Thin films

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Modification strategies improving the electrochemical and structural stability of high-Ni cathode materials

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Journal of Energy Chemistry 2024年第9期96卷 185-205页

作者： Yoon Bo Sim Hami Lee Junyoung Mun Ki Jae Kim Department of Energy Science Sungkyunkwan UniversitySuwon 16419Republic of Korea School of Advanced Materials Science and Engineering Sungkyunkwan UniversitySuwon 16419Republic of Korea SKKU Institute of Energy Science and Technology(SIEST) Sungkyunkwan UniversitySuwon 16419Republic of Korea

With the increasing spotlight in electric vehicles,there is a growing demand for high-energy-density batteries to enhance driving ***,several studies have been conducted on high-energy-density LiNi_(x)Co_(y)Mn_(z)O_(2)***,there is a limit to permanent performance deterioration because of side reactions caused by moisture in the atmosphere and continuous microcracks during cycling as the Ni content to express high energy increases and the content of Mn and Co that maintain structural and electrochemical stabilization *** direct modification of the surface and bulk regions aims to enhance the capacity and long-term performance of high-Ni cathode ***,an efficient modification requires a study based on a thorough understanding of the degradation mechanisms in the surface and bulk *** this review,a comprehensive analysis of various modifications,including doping,coating,concentration gradient,and single crystals,is conducted to solve degradation issues along with an analysis of the overall degradation mechanism occurring in high-Ni cathode *** also summarizes recent research developments related to the following modifications,aims to provide notable points and directions for post-studies,and provides valuable references for the commercialization of stable high-energy-density cathode materials.

关键词： High energy density High-Ni cathode materials Degradation Structural stability Lithium-ion battery

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Recent research progress on the phase-field model of microstructural evolution during metal solidification

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International Journal of Minerals,Metallurgy and materials 2023年第11期30卷 2095-2111页

作者： Kaiyang Wang Shaojie Lv Honghui Wu Guilin Wu Shuize Wang Junheng Gao Jiaming Zhu Xusheng Yang Xinping Mao Beijing Advanced Innovation Center for Materials Genome Engineering Institute for Carbon NeutralityUniversity of Science and Technology BeijingBeijing 100083China Institute of Steel Sustainable Technology Liaoning Academy of MaterialsShenyang 110004China Institute of Materials Intelligent Technology Liaoning Academy of MaterialsShenyang 110004China School of Civil Engineering Shandong UniversityJinan 250061China Department of Industrial and Systems Engineering The Hong Kong Polytechnic UniversityHong Kong 999077China

Solidification structure is a key aspect for understanding the mechanical performance of metal alloys,wherein composition and casting parameters considerably influence solidification and determine the unique microstructure of the *** following the principle of free energy minimization,the phase-field method eliminates the need for tracking the solid/liquid phase interface and has greatly accelerated the research and development efforts geared toward optimizing metal solidification *** recent progress in the application of phasefield simulation to investigate the effect of alloy composition and casting process parameters on the solidification structure of metals is summarized in this *** effects of several typical elements and process parameters,including carbon,boron,silicon,cooling rate,pulling speed,scanning speed,anisotropy,and gravity,on the solidification structure are *** present work also addresses the future prospects of phase-field simulation and aims to facilitate the widespread applications of phase-field approaches in the simulation of microstructures during solidification.

关键词： solidification process phase-field models microstructure evolution alloy composition casting process parameters

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Stable Cycling of All-Solid-State Lithium Batteries Enabled by Cyano-Molecular Diamond Improved Polymer Electrolytes

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Nano-Micro Letters 2024年第10期16卷 561-575页

作者： Yang Dai Mengbing Zhuang Yi-Xiao Deng Yuan Liao Jian Gu Tinglu Song Hao Yan Jin-Cheng Zheng Department of Chemical Engineering Shanghai UniversityShangda Road 99Shanghai 200444People's Republic of China Department of Physics Xiamen UniversityXiamen 361005People's Republic of China Experimental Center of Advanced Materials School of Materials Science and Engineering Beijing Institute of TechnologyBeijing 100081People's Republic of China Department of Physics and Department of New Energy Science and Engineering Xiamen University Malaysia43900 SepangMalaysia

The interfacial instability of the poly(ethylene oxide)(PEO)-based electrolytes impedes the long-term cycling and further application of all-solid-state lithium metal *** this work,we have shown an effective additive 1-adaman-tanecarbonitrile,which con-tributes to the excellent per-formance of the poly(ethylene oxide)-based *** to the strong interaction of the 1-Adamantanecarboni-trile to the polymer matrix and anions,the coordination of the Li^(+)-EO is weakened,and the binding effect of anions is strengthened,thereby improving the Li^(+)conductivity and the electrochemical *** diamond building block on the surface of the lithium anode can sup-press the growth of lithium ***,the 1-Adamantanecarbonitrile also regulates the formation of LiF in the solid electrolyte interface and cathode electrolyte interface,which contributes to the interfacial stability(especially at high voltages)and protects the electrodes,enabling all-solid-state batteries to cycle at high voltages for long periods of ***,the Li/Li symmetric cell undergoes long-term lithium plating/stripping for more than 2000 h.1-Adamantanecarbonitrile-poly(ethylene oxide)-based LFP/Li and 4.3 V Ni_(0.8)Mn_(0.1)Co_(0.1)O_(2)/Li all-solid-state batteries achieved stable cycles for 1000 times,with capacity retention rates reaching 85%and 80%,respectively.

关键词： 1-Adamantanecarbonitrile(ADCN) Poly(ethylene oxide) All-solid-state batteries Interfacial stability High voltage

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From VIB‑to VB‑Group Transition Metal Disulfides:Structure engineering Modulation for Superior Electromagnetic Wave Absorption

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Nano-Micro Letters 2024年第2期16卷 218-257页

作者： Junye Cheng Yongheng Jin Jinghan Zhao Qi Jing Bailong Gu Jialiang Wei Shenghui Yi Mingming Li Wanli Nie Qinghua Qin Deqing Zhang Guangping Zheng Renchao Che Department of Materials Science Shenzhen MSU-BIT UniversityShenzhen 517182People’s Republic of China School of Materials Science and Engineering Beijing Institute of TechnologyBeijing 100081People’s Republic of China School of Materials Science and Engineering Qiqihar UniversityQiqihar 161006People’s Republic of China Department of Mechanical Engineering Hong Kong Polytechnic UniversityHung HomKowloonHong KongPeople’s Republic of China Laboratory of Advanced Materials Shanghai Key Lab of Molecular Catalysis and Innovative MaterialsFudan UniversityShanghai 200438People’s Republic of China Zhejiang Laboratory Hangzhou 311100People’s Republic of China

The laminated transition metal disulfides(TMDs),which are well known as typical two-dimensional(2D)semiconductive materials,possess a unique layered structure,leading to their wide-spread applications in various fields,such as catalysis,energy storage,sensing,*** recent years,a lot of research work on TMDs based functional materials in the fields of electromagnetic wave absorption(EMA)has been carried ***,it is of great significance to elaborate the influence of TMDs on EMA in time to speed up the *** this review,recent advances in the development of electromagnetic wave(EMW)absorbers based on TMDs,ranging from the VIB group to the VB group are *** compositions,microstructures,electronic properties,and synthesis methods are presented in ***,the modulation of structure engineering from the aspects of heterostructures,defects,morphologies and phases are systematically summarized,focusing on optimizing impedance matching and increasing dielectric and magnetic losses in the EMA materials with tunable EMW absorption *** as well as the challenges are also identified to guide the design of new TMDs based dielectric EMA materials with high performance.

关键词： Transition metal disulfides Electromagnetic wave absorption Impedance matching Structure engineering modulation

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Solution-flame hybrid synthesis of defect-enriched mesoporous CuO_(x) nanowires for enhanced electrochemical nitrate-to-ammonia production

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Journal of Energy Chemistry 2024年第12期99卷 475-483页

作者： Li Qu Sungkyu Kim Runfa Tan Arumugam Sivanantham Seokgi Kim Yoo Jae Jeong Min Cheol Kim Seong Sik Shin Uk Sim In Sun Cho Department of Materials Science&Engineering Ajou UniversitySuwon 16499Republic of Korea Department of Energy Systems Research Ajou UniversitySuwon 16499Republic of Korea Department of Nanotechnology and Advanced Materials Engineering Sejong UniversitySeoul 05006Republic of Korea Department of Chemistry Sookmyung Women's UniversitySeoul 04310Republic of Korea Department of Nano Engineering and Department of Nano Science and Technology SKKU Advanced Institute of Nanotechnology(SAINT)Sungkyunkwan UniversitySuwonRepublic of Kore SKKU Institute of Energy Science and Technology(SIEST) Sungkyunkwan UniversitySuwonRepublic of Kore School of Energy Technology Korea Institute of Energy Technology(KENTECH)Jeonnam 58217Republic of Korea

Electrochemical nitrate reduction(ENR)is an economical and eco-friendly method for converting industrial wastewater into valuable ammonia under atmospheric *** main challenge lies in designing and developing highly durable ENR *** study introduces defect-rich mesoporous CuO_(x) nanowires electrocatalyst synthesized using a novel solution-flame(sol-flame)hybrid method to control mesoporosity and introduce surface defects,thereby enhancing the electrochemical nitrate-toammonia production *** found surface defects(oxygen vacancies and Cu^(+))and unique mesoporous nanowire structure composed of tightly interconnected *** sol-flamesynthesized CuO_(x) nanowires(sf-CuO NWs)achieved superior ammonia yield rate(0.51 mmol h^(-1)cm^(-2)),faradaic efficiency(97.3%),and selectivity(86.2%)in 1 M KOH electrolyte(2000 ppm nitrate).This performance surpasses that of non-porous and less-defective CuO NWs and is attributed to the increased surface area and rapid electron transport facilitated by the distinctive morphology and generated *** calculation further suggests oxygen vacancies enhance NO_(3)^(-)adsorption on the sf-CuO NWs’surface and mitigate the competing hydrogen evolution *** study outlines a strategic design and simple synthesis approach for nanowire electrocatalysts that boost the efficiency of electrochemical nitrate-to-ammonia conversion.

关键词： CuO nanowires Solution-flame Mesoporous Oxygen vacancy Electrochemical nitrate reduction Wastewater

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Hydrogen-bonded cytosine-endowed supramolecular polymeric nanogels: Highly efficient cancer cell targeting and enhanced therapeutic efficacy

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Journal of Colloid and Interface science 2024年 665卷 329-344页

作者： Fan, Wen-Lu Huang, Shan-You Yang, Xiu-Jing Bintang Ilhami, Fasih Chen, Jem-Kun Cheng, Chih-Chia Graduate Institute of Applied Science and Technology National Taiwan University of Science and Technology Taipei10607 Taiwan Advanced Membrane Materials Research Center National Taiwan University of Science and Technology Taipei10607 Taiwan Department of Natural Science Faculty of Mathematics and Natural Science Universitas Negeri Surabaya Surabaya60231 Indonesia Department of Materials Science and Engineering National Taiwan University of Science and Technology Taipei10607 Taiwan

We demonstrate that cytosine moieties within physically cross-linked supramolecular polymers not only manipulate drug delivery and release, but also confer specific targeting of cancer cells to effectively enhance the safety and efficacy of chemotherapy—and thus hold significant potential as a new perspective for development of drug delivery systems. Herein, we successfully developed physically cross-linked supramolecular polymers (PECH-PEG-Cy) comprised of hydrogen-bonding cytosine pendant groups, hydrophilic poly(ethylene glycol) side chains, and a hydrophobic poly(epichlorohydrin) main chain. The polymers spontaneously self-assemble into a reversibly hydrogen-bonded network structure induced by cytosine and directly form spherical nanogels in aqueous solution. Nanogels with a high hydrogen-bond network density (i.e., a higher content of cytosine moieties) exhibit outstanding long-term structural stability in cell culture substrates containing serum, whereas nanogels with a relatively low hydrogen-bond network density cannot preserve their structural integrity. The nanogels also exhibit numerous unique physicochemical characteristics in aqueous solution, such as a desirable spherical size, high biocompatibility with normal and cancer cells, excellent drug encapsulation capacity, and controlled pH-responsive drug release properties. More importantly, in vitro experiments conclusively indicate the drug-loaded PECH-PEG-Cy nanogels can selectively induce cancer cell-specific apoptosis and cell death via cytosine receptor-mediated endocytosis, without significantly harming normal cells. In contrast, control drug-loaded PECH-PEG nanogels, which lack cytosine moieties in their structure, can only induce cell death in cancer cells through non-specific pathways, which significantly inhibits the induction of apoptosis. This work clearly demonstrates that the cytosine moieties in PECH-PEG-Cy nanogels confer selective affinity for the surface of cancer cells, which enhances t

关键词： Nanogels

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Effect of Sn Content on the Microstructural Features, Martensitic Transformation and Mechanical Properties in Ti-V-Al-Based Shape Memory Alloys

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Acta Metallurgica Sinica(English Letters) 2023年第8期36卷 1247-1260页

作者： Xiao-Yang Yi Wei Liu Yun-Fei Wang Bo-Wen Huang Xin-Jian Cao Kui-Shan Sun Xiao Liu Xiang-Long Meng Zhi-Yong Gao Hai-Zhen Wang Department of Nuclear Equipment College of Nuclear Equipment and Nuclear EngineeringYantai UniversityYantai264005China School of Materials Science and Engineering Harbin Institute of TechnologyHarbin150001China Shandong Laboratory of Yantai Advanced Materials and Green Manufacturing Yantai264005China

In the present study, it is expected to tailor the microstructural features, martensitic transformation temperatures and mechanical properties of Ti-V-Al shape memory alloys through adding Sn alloying elements, which further expands their applications. Sn addition results in the monotonous rising of average valence electron number (e/a). In proportion, the single α″ martensite phase directly evolves into merely β parent phase in present Ti-V-Al-based shape memory alloys, as Sn content increases from 0.5 to 5.0 at.%. Meanwhile, Sn addition causes the reduction in the grain size. Combined with transmission electron microscopy (TEM) observation and d electron theory analysis, it can be speculated that Sn addition can suppress the precipitation of ω phase. With increasing Sn content, fracture strength invariably decreases from 962 to 792 MPa, whereas the yield strength firstly decreases and then increases. The lowest yield stress for the stress-induced martensitic transformation of 220 MPa can be obtained in Ti-V-Al shape memory alloy by adding 3.0 at.% Sn. By optimizing 1.0 at.% Sn, the excellent ductility with a largest elongation of 42.1% can be gained in Ti-V-Al shape memory alloy, which is larger than that of the reported Ti-V-Al-based shape memory alloys. Besides, as a result of solution strengthening and grain refinement, Ti-V-Al-based shape memory alloy with 5.0 at.% Sn possesses the highest yield strength, further contributing to the excellent strain recovery characteristics with 4% fully recoverable strain.

关键词： Ti-V-Al alloy Lightweight shape memory alloy Microstructural features Mechanical properties strain recoverycharacteristics

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In-situ isothermal aging TEM analysis of a micro Cu/ENIG/Sn solder joint for flexible interconnects

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Journal of materials science & technology 2024年第2期169卷 42-52页

作者： Jinhong Liu Jianhao Xu Kyung-Wook Paik Peng He Shuye Zhang State Key Laboratory of Advanced Welding and Joining Harbin Institute of TechnologyHarbin150001China Department of materials science and engineering KAIST291 Daehak-roYuseong-guDaejeon305-338Republic of Korea

Sn/ENIG has recently been used in flexible interconnects to form a more stable micron-sized metallurgical joint,due to high power capability which causes solder joints to heat up to 200℃.However,Cu_(6)Sn_(5)which is critical for a microelectronic interconnection,will go through a phase transition at temperatures between 186 and 189℃.This research conducted an in-situ TEM study of a micro Cu/ENIG/Sn solder joint under isothermal aging test and proposed a model to illustrate the mechanism of the microstructural *** results showed that part of the Sn solder reacted with Cu diffused from the electrode to formη´-Cu_(6)Sn_(5)during the ultrasonic bonding process,while the rest of Sn was left and enriched in a region in the solder *** the enriched Sn quickly diffused to both sides when the temperature reached 100℃,reacting with the ENIG coating and Cu to form(Ni_(x)Cu_(1-x))_(3)Sn_(4),AuSn_(4),and Cu_(6)Sn_(5)*** entering the heat preservation process,the diffusion of Cu from the electrode to the joint became more intense,resulting in the formation of Cu_(3)*** scallop-type Cu_(6)Sn_(5)and the seahorse-type Cu_(3)Sn constituted a typical two-layered structure in the solder *** importantly,the transition betweenηandη’was captured near the phase transition temperature for Cu_(6)Sn_(5)during both the heating and cooling process,which was accompanied by a volume shifting,and the transition process was further *** research is expected to serve as a reference for the service of micro Cu/ENIG/Sn solder joints in the electronic industry.

关键词： In-situ TEM observation Isothermal aging Micro Cu/ENIG/Sn solder joint Cu_(6)Sn_(5)phase transition

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