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SSRN 2024年

作者： Mohideen, Mohamedazeem M. Qadir, Abdul Ramakrishna, Seeram Liu, Yong Beijing Key Laboratory of Advanced Functional Polymer Composites College of Materials Science and Engineering Beijing University of Chemical Technology Beijing100029 China Center for Nanofibers and Nanotechnology National University of Singapore Singapore1157 Singapore

The quest for non-precious electrocatalysts through biomass for energy application has attracted keen interest, but optimization for fuel cells remains challenging. Herein, we have developed nitrogen and sulfur-anchored MXene hybrid chitosan-derived carbon sphere (N,S-MXC) as a novel electrocatalyst for oxygen reduction reaction (ORR). Interestingly, as the mass ratio of MXene to Chitosan varied by (1:2, 1:1, and 2:1), the microstructures of the as-prepared catalysts changed, which drastically influenced the corresponding ORR performance. Notably, when the mass ratio was maintained to be 1:2, Ti3C2 nanoparticles were dispersed on the surface of the carbon core-shell and created multimodal porous morphology that helps to facilitate faster electron transfer, resulting in a high onset-potential of 0.89 V and limiting current density of -4.2 mA/cm2 as well as excellent durability with minimum half-wave potential loss of 2.3 mV after 5000 cyclic voltammetry (CV) cycles. Besides, the corresponding catalyst also possessed robust stability of 87.47% and an excellent methanal poisoning tolerance effect in an alkaline medium. In a nutshell, this work paves the pathway for converting sea animal waste to develop porous carbon as supporting material for fuel cells that directly or indirectly support achieving carbon neutrality. © 2024, The Authors. All rights reserved.

关键词： Carbon

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Local excitation of kagome spin ice magnetism in HoAgGe seen by scanning tunneling microscopy

arXiv

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arXiv 2024年

作者： Deng, Hanbin Yang, Tianyu Liu, Guowei Liu, Lu Zhao, Lingxiao Wang, Wu Li, Tiantian Song, Wei Neupert, Titus Liu, Xiang-Rui Shao, Jifeng Zhao, Y.Y. Xu, Nan Deng, Hao Huang, Li Zhao, Yue Zhang, Liyuan Mei, Jia-Wei Wu, Liusuo He, Jiaqing Liu, Qihang Liu, Chang Yin, Jia-Xin Department of Physics Southern University of Science and Technology Shenzhen China Shenzhen China Shenzhen Key Laboratory of Advanced Quantum Functional Materials and Devices Southern University of Science and Technology Shenzhen China Department of Physics University of Zurich Winterthurerstrasse Zurich Switzerland Shenzhen Institute for Quantum Science and Engineering Southern University of Science and Technology Guangdong Shenzhen China Institute for Advanced Studies Wuhan University Wuhan430072 China School of Physical Science and Technology ShanghaiTech University Shanghai201210 China Guangdong Provincial Key Laboratory of Computational Science and Material Design Southern University of Science and Technology Shenzhen China

The kagome spin ice can host frustrated magnetic excitations by flipping its local spin. Under an inelastic tunneling condition, the tip in a scanning tunneling microscope can flip the local spin, and we apply this technique to kagome metal HoAgGe with a long-range ordered spin ice ground state. Away from defects, we discover a pair of pronounced dips in the local tunneling spectrum at symmetrical bias voltages with negative intensity values, serving as a striking inelastic tunneling signal. This signal disappears above the spin ice formation temperature and has a dependence on the magnetic fields, demonstrating its intimate relation with the spin ice magnetism. We provide a two-level spin-flip model to explain the tunneling dips considering the spin ice magnetism under spin-orbit coupling. Our results uncover a local emergent excitation of spin ice magnetism in a kagome metal, suggesting that local electrical field induced spin flip climbs over a barrier caused by spin-orbital locking. © 2024, CC BY.

关键词： Scanning tunneling microscopy

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Direct ink writing of continuous SiO2 fiber reinforced wave-transparent ceramics

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Journal of advanced Ceramics 2020年第4期9卷 403-412页

作者： Zhe Zhao Guoxiang Zhou Zhihua Yang Xianqi Cao Dechang Jia Yu Zhou Key Laboratory of Advanced Structural-Functional Integration Materials&Green Manufacturing Technology Harbin Institute of TechnologyHarbin150001China Institute for Advanced Ceramics School of Materials Science and EngineeringHarbin Institute of TechnologyHarbin150080China State Key Laboratory of Advanced Welding and Joining Harbin Institute of TechnologyHarbin150001China Institute of Petrochemistry Heilongjiang Academy of Science Harbin150001China

This article reports the first example of 3D printed continuous SiO2 fiber reinforced wave-transparent ceramic composites via an adaptation of direct ink writing technology to improve the mechanical and dielectric properties of *** ceramic inks showed good printability by adding nano-SiO2 *** effective continuous fiber-reinforced printing progress was achieved through the design and optimization of the coaxial needle structures by finite element *** printing,the continuous fibers were evenly and continuously distributed in the matrix ceramics and the high molding precision for fiber reinforced composite was *** is demonstrated that 10 vol%continuous SiO2 fiber improved the bending strength of ceramics by about 27%better than that of the ceramics without fiber and the dielectric performance has also been greatly *** novel method unravels the potential of direct ink writing of continuous fiber reinforced wave-transparent ceramics with complex structures and improved properties.

关键词： 3D printing continuous fiber reinforced rheology dielectric properties

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Breaking low-strain and rapid-kinetics trade-off in heterostructured prussian blue cathode toward robust sodium storage

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Journal of Colloid and Interface science 2025年 698卷 138106页

作者： Li, Shaoxiong Chen, Dongping Tian, Shengji Zhang, Chu He, Weidong Lv, Chade Yan, Chunshuang MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage State Key Laboratory of Space Power-Sources School of Chemistry and Chemical Engineering Harbin Institute of Technology Harbin150001 China National Key Laboratory of Science and Technology on Advanced Composites in Special Environments and Center for Composite Materials and Structures Harbin Institute of Technology Harbin150080 China Chongqing Research Institute Harbin Institute of Technology Chongqing401151 China School of Mechanical Engineering Chengdu University Chengdu610106 China

Manganese-based hexacyanoferrate has garnered unprecedented attention for sodium-ion batteries due to their high theoretical capacity. However, the structural strain associated with Jahn-Teller distortion incurs fast capacity decline and poor rate capability. Effectively reconciling the trade-off between low-strain and rapid-kinetics in manganese-based hexacyanoferrate cathode poses a considerable challenge. Herein, an elegant strategy based on the stress engineering of heterointerface on nickle-doped manganese hexacyanoferrate@nickle hexacyanoferrate core@shell cathode is proposed to balance the volume strain and charge transfer kinetics during charge/discharge process. As evidenced by the operando X-ray diffraction experiments, differential electrochemical mass spectrometry, and theoretical calculations, the interfacial stress can be regulated by precisely tailoring the shell thickness to stabilize the built-in electric field, which ensures the good structural stability and fast charge diffusion kinetics. Consequently, the as-developed cathode delivers a reversible capacity of 81.0 mAh g−1, excellent cycling stability (81.9 % of capacity retention after 800 cycles), and superior rate performance (55.1 mAh g−1 at 10 C). Our work heralds a promising strategy of heterointerface strain engineering for exploring advanced MnHCFs cathode materials toward high-performance sodium storage. © 2025 Elsevier Inc.

关键词： Shells (structures)

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Photoresponsive aggregation-induced emission polymer film for anti-counterfeiting

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Chinese Chemical Letters 2021年第12期32卷 3882-3885页

作者： Hong Yang Mengqi Li Weijun Zhao Zhiqian Guo Wei-Hong Zhu Shanghai Key Laboratory of Functional Materials Chemistry Key Laboratory for Advanced Materials and Institute of Fine Chemicals.Joint International Research Laboratory of Precision Chemistry and Molecular EngineeringFeringa Nobel Prize Scientist Joint Research CenterSchool of Chemistry and Molecular EngineeringEast China University of Science&TechnologyShanghai 200237China

The development of solid-state smart materials, in particular those showing photoresponsive luminescence, is highly desirable for their cutting edge applications in displays, sensors, data-storage, and anticounterfeiting. However, to achieve both excellent photoresponsive performance and bright luminescence in solid state remains challenge. Herein, we integrate a novel photochromic fluorophore YL into flexible polymer chains, thereby enabling the resultant polymer PYL with reversible photoisomerization upon aggregation. Remarkably, the polymer PYL possesses excellent photochromic properties and aggregationinduced emission(AIE) activity, which can be attributed to the photoactive YL moiety. Upon light exposure, its film exhibits reversibly off-to-on fluorescent modulation with quick response, high emission efficiency and signal contrast, sharply different from the weak emission in solution. The novel photoresponsive AIE polymer with invisible/visible color and fluorescence transformation allows for advanced anti-counterfeiting applications. This work provides an efficient platform for constructing solid-state photocontrollable luminescent materials.

关键词： Aggregation-induced emission Photoresponsive luminescence Diarylethene Photochromism Polymer film Anti-counterfeiting

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Phase-pure two-dimensional Fe_(X)GeTe_(2) magnets with near-room-temperature Tc

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Nano Research 2022年第1期15卷 457-464页

作者： Govindan Kutty Rajendran Nair Zhaowei Zhang Fuchen Hou§ Ali Abdelaziem Xiaodong Xu Steve Wu Qing Yang Nan Zhang Weiqi Li Chao Zhu Yao Wu Heng Weiling Lixing Kang Teddy Salim Jiadong Zhou Lin Ke Junhao Lin Xingji Li Weibo Gao Zheng Liu School of Material Science and Engineering 50 Nanyang Ave639798Singapore Division of Physics and Applied Physics School of Physical and Mathematical SciencesNanyang Technological University21 Nanyang Link637371 Singapore Department of Physics Southern University of Science and TechnologyShenzhen 518055China Institute of Materials Research and Engineering Agency for Science Technology and Research(A*STAR)2 Fusionopolis WaySingapore 138634Singapore School of Material Science and Engineering School of PhysicsHarbin Institute of TechnologyHarbin 150001China Shenzhen Key Laboratory of for Advanced Quantum Functional Materials and Devices Southern University of Science and TechnologyShenzhen 518055China National Institute of Laser Enhanced Sciences(NILES) Cairo UniversityGiza 12613Egypt CINTRA CNRS/NTU/THALES UMI3288Research Techno Plaza637553Singapore School of Electrical and Electronic Engineering Nanyang Technological University50 Nanyang Ave639798Singapore

Two-dimensional(2D)ferromagnets with out-of-plane(OOP)magnetic anisotropy are potential candidates for realizing the next-generation memory devices with ultra-low power consumption and high storage ***,a scalable approach to synthesize 2D magnets with OOP anisotropy directly on the complimentary metal-oxide semiconductor(CMOS)compatible substrates has not yet been mainly explored,which hinders the practical application of 2D *** work demonstrates a cascaded space confined chemical vapor deposition(CS-CVD)technique to synthesize 2D FexGeTe_(2) *** weight fraction of iron(Fe)in the precursor controls the phase purity of the as-grown *** a result,high-quality Fe_(3)GeTe_(2) and Fe_(5)GeTe_(2) flakes have been grown selectively using the CS-CVD *** temperature(Tc)of the as-grown FexGeTe2 can be up to-280 K,nearly room *** thickness and temperature-dependent magnetic studies on the Fe_(5)GeTe_(2) reveal a 2D Ising to 3D XY ***,Terahertz spectroscopy experiments on Fe_(5)GeTe_(2) display the highest conductivity among other FexGeTe_(2) 2D *** results of this work indicate a scalable pathway for the direct growth and integration of 2D ternary magnets on CMOS-based substrates to develop spintronic memory devices.

关键词： cascaded space confined chemical vapor deposition(CVD) van der Waals(vdW) ferromagnetism out of plane anisotropy iron germanium telluride terahertz

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High-Performance Potassium-Ion-Based Full Battery Enabled by an Ionic-Drill Strategy

引用

CCS Chemistry 2021年第9期3卷 85-94页

作者： Chunlei Jiang Xing Meng Yongping Zheng Jiaxiao Yan Zhiming Zhou Yongbing Tang Functional Thin Films Research Center Shenzhen Institutes of Advanced TechnologyChinese Academy of SciencesShenzhen 518055 School of Materials Science and Engineering Chongqing University of TechnologyChongqing 400054 Nano Science and Technology Institute University of Science and Technology of ChinaSuzhou 215123 Key Laboratory of Advanced Materials Processing&Mold Ministry of EducationZhengzhou UniversityZhengzhou 450002

Potassium-ion(K^(+))batteries(PIBs)show great potential in large-scale energy storage applications owing to their low-cost and high-operating ***,the development of practical PIBs remains hindered by their poor performance rate due to the large ionic radius of the K^(+)(1.38Å).Herein,we report an ionic-drill strategy using smaller lithium ions(Li+)to open diffusion channels for K^(+)in the host electrode and enable much faster kinetics of K-ions.

关键词： ionic-drill strategy rate performance dif-fusion kinetics potassium-ion full battery

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Correction:advanced Janus Membrane with Directional Sweat Transport and Integrated Passive Cooling for Personal Thermal and Moisture Management

引用

advanced Fiber Materials 2024年第6期6卷 1995-1996页

作者： Peng Yang Yanshan Ju Jiajun He Zhengcai Xia Liang Chen Shaochun Tang National Laboratory of Solid State Microstructures Collaborative Innovation Center of Advanced Microstructures Jiangsu Key Laboratory of Artificial Functional Materials College of Engineering and Applied Sciences Nanjing University Nanjing 210093 Jiangsu People’s Republic of China School of Physics and Wuhan National High Magnetic Field Center Huazhong University of Science and Technology Wuhan 430074 Hubei People’s Republic of China

关键词

关键词： Directional water transport Evaporative cooling Radiative cooling Surface wettability Thermal and moisture management

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Imaging/nonimaging microoptical elements and stereoscopic systems based on femtosecond laser direct writing

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Light(advanced Manufacturing) 2023年第4期4卷 207-233页

作者： Long Huang Zhihan Hong Qi-Dai Chen Yong-Lai Zhang Shaoqing Zhao Yongjun Dong Yu-Qing Liu Hua Liu Center for Advanced Optoelectronic Functional Materials Research and Key Laboratory for UV-Emitting Materials and Technology of Ministry of EducationNational Demonstration Center for Experimental Physics EducationNortheast Normal University5268 Renmin StreetChangchun 130024China Wyant College of Optical Sciences The University of Arizona1630 E.University BlvdTucsonArizona 85721USA Key Laboratory on Integrated Optoelectronics College of Electronic Science and EngineeringJilin UniversityChangchun 130012China

The development of modern information technology has led to significant demand for microoptical elements with complex surface profiles and nanoscale surface ***,various micro-and nanoprocessing techniques are used to fabricate microoptical elements and *** laser direct writing(FsLDW)uses ultrafast pulses and the ultraintense instantaneous energy of a femtosecond laser for micro-nano *** exhibits various excellent properties,including nonlinear multiphoton absorption,high-precision processing beyond the diffraction limit,and the universality of processable materials,demonstrating its unique advantages and potential applications in three-dimensional(3D)micro-nano *** has demonstrated its value in the fabrication of various microoptical *** study details three typical principles of FsLDW,several design considerations to improve processing performance,processable materials,imaging/nonimaging microoptical elements,and their stereoscopic ***,a summary and perspective on the future research directions for FsLDW-enabled microoptical elements and stereoscopic systems are provided.

关键词： Femtosecond laser direct writing Microoptical elements 3D printing Micro/nano fabrication

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Mapping Hydrogen Evolution Activity Trends of V-based A15 Superconducting Alloys

arXiv

引用

arXiv 2024年

作者： Yu, Peifeng Zhan, Jie Zhang, Xiaobing Wang, Kangwang Zeng, Lingyong Li, Kuan Zhang, Chao Li, Longfu Liang, Ying Yan, Kai Sun, Yan Luo, Huixia School of Materials Science and Engineering State Key Laboratory of Optoelectronic Materials and Technologies Guangdong Provincial Key Laboratory of Magnetoelectric Physics and Devices Key Lab of Polymer Composite & Functional Materials Sun Yat-Sen University Guangzhou510275 China Beijing Advanced Innovation Center for Materials Genome Engineering State Key Laboratory for Advanced Metals and Materials University of Science and Technology Beijing Beijing100083 China Basic Course Department Guangzhou Maritime University Guangzhou510725 China School of Environmental Science and Engineering Sun Yat-Sen University Guangzhou510275 China Shenyang National Laboratory for Materials Science Institute of Metal Research Chinese Academy of Sciences Shenyang110016 China School of Materials Science and Engineering University of Science and Technology of China Shenyang110016 China

Exploring high-efficiency and low-cost electrocatalysts is valuable for water-splitting technologies. Recently, Si-group compounds have attracted increasing attention in electrocatalysis, considering the abundant Si-group elements on Earth. However, Si-group compounds for HER electrocatalysis have not been systematically studied. In this study, we unveil the activity trends of non-noble metal catalyst A15-type V3M (i.e., V3Si, V3Ge, and V3Sn) superconductors and show that V3Si is the most efficient HER catalyst because of the high electronic conductivity and suitable d-band center. Among them, the V3Si only requires 33.4 mV to reach 10 mA cm-2, and only 57.6 mV and 114.6 mV are required to attain a high current density of 100 mA cm−2 and 500 mA cm−2, respectively. These low overpotentials are close to the 34.3 mV at 10 mA cm−2 of state-of-art Pt/C (20 %) but superior to 168.5 mV of Pt/C (20 %) at 100 mA cm-2. Furthermore, the V3Si illustrates exceptional durability with no obvious decay in the 120 h at the different current densities (i.e., 10 - 250 mA cm−2). The excellent HER activity of V3Si alloy can be ascribed to the synergies of superior electronic conductivity and suitable d-band center. Moreover, DFT calculations reveal that |ΔGH*| is decreased after introducing the V to Si. Beyond offering a stable and high-performance electrocatalyst in an acidic medium, this work inspires the rational design of desirable silicide electrocatalysts. Copyright © 2024, The Authors. All rights reserved.

关键词： Hydrogen

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