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Status and challenges facing representative anode materials for rechargeable lithium batteries

Journal of Energy Chemistry 2022年第3期31卷 260-294,I0008页

作者： Liqiang Zhang Chenxi Zhu Sicheng Yu Daohan Ge Haoshen Zhou Institute of Intelligent Flexible Mechatronics School of Mechanical EngineeringJiangsu UniversityZhenjiang 212013JiangsuChina Center of Energy Storage Materials&Technology College of Engineering and Applied SciencesJiangsu Key Laboratory of Artificial Functional MaterialsNational Laboratory of Solid State Microstructuresand Collaborative Innovation Center of Advanced MicrostructuresNanjing UniversityNanjing 210093JiangsuChina Energy Technology Research Institute National Institute of Advanced Industrial Science and Technology(AIST)Tsukuba 305-8568Japan

Rechargeable lithium batteries have been widely regarded as a revolutionary technology to store renewable energy sources and extensively researched in the recent several *** an indispensable part of lithium batteries,the evolution of anode materials has significantly promoted the development of lithium ***,since conventional lithium batteries with graphite anodes cannot meet the ever-increasing demands in different application scenarios(such as electric vehicles and large-scale power supplies)which require high energy/power density and long cycle life,various improvement strategies and alternative anode materials have been exploited for better electrochemical *** this review,we detailedly introduced the characteristics and challenges of four representative anode materials for rechargeable lithium batteries,including graphite,Li_(4)Ti_(5)O_(12),silicon,and lithium *** some of the latest advances are summarized,which mainly contain the modification strategies of anode materials and partially involve the optimization of electrode/electrolyte ***,we make the conclusive comments and perspectives,and draw a development timeline on the four anode *** review aims to offer a good primer for newcomers in the lithium battery field and benefit the structure and material design of anodes for advanced rechargeable lithium batteries in the future.

关键词： Lithium batteries Anode Graphite Li_(4)Ti_(5)O_(12) Silicon Silicon composite anode Lithium metal

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Upconversion hollow nanospheres CeF_(3) co-doped with Yb^(3+) and Tm^(3+) for photocatalytic nitrogen fixation

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Journal of Rare Earths 2022年第4期40卷 586-594,I0003页

作者： Minghui Zhong Zhendong Wang Da Dai Baozhu Yang Shixiang Zuo Chao Yao Fengqin Wu Xiazhang Li Advanced Catalysis and Green Manufacturing Collaborative Innovation Center Jiangsu Key Laboratory of Advanced Catalytic Materials and TechnologyChangzhou UniversityChangzhou 213164China W.M.Keck Center for Advanced Microscopy and Microanalysis University of DelawareNewarkDE19716USA

Solar driven nitrogen(N_(2))fixation to synthesize ammonia is a potential alternative for the traditional Haber-Bosch approach to meeting industrial demand,but is largely hampered by the difficulties in the harvesting of solar energy and activating inert N_(2).In this work,hollow CeF_(3) nanospheres co-doped with activator Tm^(3+)and sensitizer Yb^(3+)(Yb^(3+):Tm^(3+):CeF_(3))were prepared by microwave hydrothermal *** product was employed as a catalyst for photo-driven N_(2) fixation by adjusting the molar ratio of Ce^(3+):Yb^(3+):Tm^(3+).Results show that the porous hollow structure enhances the light-harvesting by physical scattering and *** addition,heteroatom doping generates abundant fluorine vacancies(F_(V))which provide abundant active sites for adsorption and activation of N_(2).The sample with molar ratio of CeF_(3):Yb^(3+):Tm^(3+)at 178:20:2 demonstrates the highest utilization of solar energy attributed to the strongest upconversion capability of near-infrared(NIR)light to visible and ultraviolet(UV)light,and the NH_(4)+concentration achieves the highest value of 15.06μmol/(gcat∙h)under simulated sunlight while nearly 6.22μmol/(gcat∙h)under NIR *** study offers a promising and sustainable strategy for the fixation of atmospheric N_(2) using full-spectrum solar energy.

关键词： Rare earth CeF_(3) Hollow structure Upconversion Fluorine vacancy Photocatalytic nitrogen fixation

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Layered double hydroxide nanosheets activate CsPbBr_(3) nanocrystals for enhanced photocatalytic CO_(2) reduction

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Nano Research 2022年第7期15卷 5953-5961页

作者： Shuang Zhao Qian Liang Zhongyu Li Hong Shi Zhenyu Wu Hui Huang Zhenhui Kang Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology School of Petrochemical EngineeringChangzhou UniversityChangzhou 213164China Institute of Functional Nano and Soft Materials Laboratory(FUNSOM) Jiangsu Key Laboratory for Carbon-Based Functional Materials&DevicesSoochow UniversitySuzhou 215123China Macao Institute of Materials Science and Engineering Macao University of Science and TechnologyTaipa 999078MacaoChina Institute of Advanced Materials Northeast Normal UniversityChangchun 130024China

Halide perovskite nanocrystals are potential catalysts for CO_(2) photoreduction,while,the strong radiative recombination and insufficient stability limit their catalytic performance and ***,we report that layered double hydroxide nanosheets activate CsPbBr_(3) nanocrystals(CLDH)for enhanced photocatalytic CO_(2) *** CLDH heterojunctions show the remarkably enhanced CO_(2) photoreduction performance;without cocatalyst and sacrificial agent,the average electron consumption rate of CLDH(49.16μmol·g^(−1)·h^(−1))is approximately 3.7 times higher than that of pristine CsPbBr_(3).Also,CLDH catalyst exhibits a robust stability after ten cycles over 30 h.

关键词： CsPbBr_(3) NiAl-LDH CO_(2)reduction Z-scheme photocatalysis

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Epitaxially Growing 2D RGB Trichromatic Cocrystal Nanomeshes to Trigger Cross-Modulation White Light Emission

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Chinese Journal of Chemistry 2024年第24期42卷 3379-3386页

作者： Wenyubin Luo Cheng Zhang Shan Yang Lei Ding Yang Li Yanqiu Sun Qichun Zhang School of Chemistry and Life Sciences Suzhou University of Science and TechnologySuzhouJiangsu 215009China Key Laboratory of Efficient Low-carbon Energy Conversion and Utilization of Jiangsu Provincial Higher Education Institutions School of Physical Science and TechnologySuzhou University of Science and TechnologySuzhouJiangsu 215009China Department of Materials Science and Engineering Department of ChemistryCenter of Super-Diamond and Advanced Films(COSDAF)&Hong Kong Institute of Clean EnergyCity University of Hong KongHong Kong 999077China

Considering their oriented crystalline structure and high luminescent efficiency,the exploration of multi-component organic cocrystal systems with tunable supramolecular nanostructures and potential RGB light emission has emerged as a captivating but challenging ***,we propose a straightforward synthetic strategy to precisely govern the assembly,structure and structure-property relationship of organic *** employing the single-crystalline template-assisted epitaxial growth(SCT-EG)method,the two-dimensional(2D)highly-aligned cocrystal nanomeshes are firstly developed to afford an exceptional RGB trichromatic system,triggering cross-modulation white light emission(WLE)with remarkable stability and regeneration capacity over six *** transformation from random 1D microstructures to uniformly-oriented 2D nanomeshes can be attributed to the regulatory competitive intermolecularπ-π,CT interactions,and partial H bond interactions among ***,the successful construction of 2D RGB trichromatic cocrystal nanomeshes system holds promise to generate full-color display,which can function as multicolor inks for photonic dynamic recognition,information encryption,and decryption.

关键词： Organic cocrystal Nanomesh RGB trichromatic system Cross-modulation white light emission Competitive intermolecular interactions Organic optoelectronics Photoelectric performances 2D materials

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Enhancing Structural Stability and Electrochemical Performance of Ultra-high Ni-rich Co-free Cathode via MgHPO_(4) Dual-functional Modification

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Chemical Research in Chinese Universities 2025年第2期41卷 333-342页

作者： LIN Huahui SHEN Yu WEI Li SONG Ran WU Fan WEI Peng YANG Zhenzhong REN Yurong QU Ke DING Zhengping Changzhou Key Laboratory of Intelligent Manufacturing and Advanced Technology for Power Battery Jiangsu Province Engineering Research Center of Intelligent Manufacturing Technology for the New Energy Vehicle Power BatterySchool of Materials Science and EngineeringChangzhou UniversityChangzhou 213164P.R.China Key Laboratory of Polar Materials and Devices(MOE) Shanghai Center of Brain-inspired Intelligent Materials and DevicesDepartment of ElectronicsEast China Normal UniversityShanghai 200241P.R.China

Ultra-high nickel layered cathodes(Ni≥95%)have emerged as prospective candidates for next-generation lithium-ion batteries(LIBs)due to their exceptional specific capacity and ***,the commercial application of these cathodes has been hindered by several challenges,including structural instability during cycling,high sensitivity to air,and slow Li+*** this research,a one-step modification strategy was developed to simultaneously achieve Mg doping and Li_(3)PO_(4)layer coating for the ultra-high nickel *** results demonstrated that Mg doping not only alleviates lattice strain changes during the H2–H3 phase transition(H2:the second hexagonal phase;H3:the third hexagonal phase)but also serves as a structural anchor,preventing Ni^(2+)migration and occupation within the Li *** Li_(3)PO_(4)surface coating layer acts as an electrochemical shield,protecting against interfacial side reactions and enhancing the Li+diffusion *** a result,the LiNi_(0.95)Mn_(0.05)O_(2) cathode,with both internal and external modifications,demonstrates significant improvement in cycling stability(85.7%capacity retention after 100 cycles)and Li^(+)transport performance(130.6 mA·h·g^(−1) at 10 C,1 C=189.6 mA·h·g^(−1)),providing a solid foundation for the further development and application of ultra-high nickel cathodes.

关键词： Lithium-ion battery Ni-rich Co-free cathode MgHPO_(4) Surface modification

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Influence of nano-mechanical evolution of Ti_(3)AlC_(2) ceramic on the arc erosion resistance of Ag-based composite electrical contact material

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Journal of advanced Ceramics 2024年第2期13卷 176-188页

作者： Xuelian Wu Chengzhe Wu Xinpeng Wei Wanjie Sun Chengjian Ma Yundeng Zhang Gege Li Liming Chen Dandan Wang Peigen Zhang Zhengming Sun Jianxiang Ding School of Materials Science and Engineering Anhui University of TechnologyMa’anshan 243032China Analytical and Testing Center Yancheng Institute of TechnologyYancheng 224051China School of Materials Science and Engineering Changzhou UniversityChangzhou 213164China Jiangsu Key Laboratory of Advanced Metallic Materials School of Materials Science and EngineeringSoutheast UniversityNanjing 211189China

Al-containing MAX phase ceramic has demonstrated great potential in the field of high-performance low-voltage electrical contact *** the anti-arc erosion mechanism of the MAX phase is crucial for further improving performance,but it is not *** this study,Ag/Ti_(3)AlC_(2) electrical contact material was synthesized by powder metallurgy and examined by nanoindentation techniques such as constant loading rate indentation,creep testing,and continuous stiffness *** results indicated a gradual degradation in the nano-mechanical properties of the Ti_(3)AlC_(2) reinforcing phase with increasing arc erosion times,although the rate of this degradation appeared to decelerate over arc erosion ***,continuous stiffness measurements highlighted the uneven mechanical properties within Ti_(3)AlC_(2),attributing this heterogeneity to the phase’s *** the early(1-100 times)and intermediate(100-1000 times)stages of arc erosion,the decline in the nano-mechanical properties of Ti_(3)AlC_(2) was primarily ascribed to the decomposition of Ti_(3)AlC_(2) and limited surface *** the later stage of arc erosion(1000-6200 times),the inner region of Ti_(3)AlC_(2) also sustained arc damage,but a thick oxide layer formed on its surface,enhancing the mechanical properties and overall arc erosion resistance of the Ag/Ti_(3)AlC_(2).

关键词： MAX phase nano-mechanical properties decomposition surface oxidation anti-arc erosion mechanism

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Developing Zn–1.5Mg Alloy with Simultaneous Improved Strength,Ductility and Suitable Biodegradability by Rolling at Room Temperature

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Acta Metallurgica Sinica(English Letters) 2023年第11期36卷 1833-1843页

作者： Ziyue Xu Huan Liu Guangyang Hu Xiaoru Zhuo Kai Yan Jia Ju Wenkai Wang Hang Teng Jinghua Jiang Jing Bai College of Mechanics and Materials Hohai UniversityNanjing210000China Jiangsu Key Laboratory for Light Metal Alloys Nanjing Yunhai Special Metals Co.Ltd.Nanjing211200China College of Mechanical Engineering Yangzhou UniversityYangzhou225127China Jiangsu Key Laboratory of Advanced Structural Materials and Application Technology Nanjing Institute of TechnologyNanjing211167China School of Transportation Engineering Nanjing Vocational University of Industry TechnologyNanjing210000China College of Materials Science and Engineering Southeast UniversityNanjing211189China

This study systematically investigated the influence of the microstructure evolution,mechanical properties and corrosion behaviors on Zn–1.5Mg(wt%)alloy processed by room-temperature *** as-cast Zn–1.5Mg alloy consists ofη-Zn matrix andη-Zn+Mg_(2)Zn_(11)eutectic *** rolling reduction increases,the average grain size of the alloy reduces from 42.9 to 1.7μm,and the eutectic structure undergoes fragmentation and refinement,changing from a network distribution surrounding the matrix to a lamellar alternating distribution with the *** ultimate tensile strength of the as-rolled alloy(80%reduction)is increased to 366±3.7 MPa,along with a good elongation of 18.4%±2.0%.Immersion tests in Hanks’solution indicate that the initial corrosion rate of the 80%-rolled alloy is 0.030 mm/year and finally stabilizes at 0.034 mm/year when the immersion duration is extended to 21 *** to X-ray diffractometer and X-ray photoelectron spectroscopy analyses,Ca_(3)(PO_(4))_(2),CaCO_(3),Ca(OH)_(2),Zn_(3)(PO_(4))_(2),Zn(OH)_(2),ZnO and a small amount of MgO and MgCO_(3)are the main corrosion products on the *** to the microstructure refinement,the developed alloy exhibits uniform corrosion,and the corrosion morphology is dominated by pitting pits.

关键词： Zn-1.5Mg alloy Rolling Microstructure Mechanical properties Corrosion behavior

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Binocular Ranging Based on Improved ORB-RANSAC 41

Binocular Ranging Based on Improved ORB-RANSAC

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第41届中国控制会议

作者： Mingchun Sun Chunjian Hua Rui Pan School of Mechanical Engineering Jiangnan University Jiangsu Key Laboratory of Advanced Food Manufacturing Equipment & Technology

ISBN: (数字)9789887581536

ISBN: (纸本)9781665482561

The distance of the obstacles ahead is the information that needs to be acquired first for technologies such as automatic driving and robot *** at the problems of high mismatch rate and low measurement accuracy of the traditional binocular vision measurement method based on feature point matching,this paper proposes a binocular ranging method based on ORB feature and random sample consensus(RANSAC).First,in order to initially screen the correct matching point pairs,the method of combining epipolar constraint based on binocular position information and feature matching based on Hamming distance is used to delete mismatched ***,in order to further obtain high-reliability RANSAC interior points,the sequential consistency constraint method of nearest neighbors based on kd-tree is used to screen out the initial interior point set,and the iterative pre-check method is used to improve the matching speed of ***,in order to obtain a higher precision distance,the sub-pixel point disparity is obtained by quadric surface fitting,and calculated actual *** show that the algorithm in this paper improves feature matching and measurement accuracy,and meets real-time requirements.

关键词： random sample consensus epipolar constraint k-dimension tree sequential consistency constraint sub-pixel

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Recent progress on garnet phosphor ceramics for high power solid-state lighting

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Journal of Materials Science & technology 2023年第35期166卷 1-20页

作者： Congcong Yang Xiyue Zhang Jian Kang Cong Wei Pengfei Sang Shenghui Lin Bingheng Sun Jintai Fan Benxue Jiang Yang Li Xinrong Chen Jian Xu Hao Chen Le Zhang Jiangsu Key Laboratory of Advanced Laser Materials and Devices School of Physics and Electronics EngineeringJiangsu Normal UniversityXuzhou 221116China Jiangsu Xiyi Advanced Materials Research Institute of Industrial Technology Xuzhou 221400China Shanghai Institute of Optics Fine Mechanics Chinese Academy of SciencesShanghai 201800China School of Material Science and Engineering Shanghai Institute of TechnologyShanghai 201418China School of Physics and Electronic Information Henan Polytechnic UniversityJiaozuo 454000China Xuzhou Fuchang Electronic Technology Co. Ltd.Xuzhou 221116China Xuzhou Kangna Advanced Materials Technology Co.Ltd. Xuzhou 221400China

As the fourth-generation light source,solid-state lighting has developed rapidly in the past 30 years due to its advantages of high efficiency and environmental *** is widely used in various scenes such as automobile headlights,projection displays,industrial production,and remote ***-power,high-brightness white light-emitting diodes(LEDs)and laser diodes(LDs)technology put forward new requirements for the service stability of color conversion *** phosphor ceramics have emerged with their unique advantages of withstanding high power excitation density and the flexibly tunable *** this article,the research progress of garnet based phosphor ceramics for high-power solid-state lighting was comprehensively ***,the band gap and coordination environment regulations of luminescence centers of garnet phosphor were ***,the improvement of luminous efficacy via defects regulation was ***,the relationship between the geometric design and the lighting performance was ***,the characterization methods of phosphor ceramics for laser lighting were introduced and ***,the development trend of garnet phosphor ceramics in solid state lighting and display was prospected.

关键词： Garnet phosphor ceramics High power excitation density Crystal field regulation Micro-scale defects Geometric structural design Luminescence evaluation standard

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RA Loss: Relation-Aware Loss for Robust Person Re-identification 16th

RA Loss: Relation-Aware Loss for Robust Person Re-identific...

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16th Asian Conference on Computer Vision, ACCV 2022

作者： Wang, Kan Hu, Shuping Cheng, Jun Cheng, Jun Pang, Jianxin Tan, Huan Guangdong Provincial Key Laboratory of Robotics and Intelligent System Shenzhen Institute of Advanced Technology Chinese Academy of Sciences Shenzhen China Guangdong Provincial Key Laboratory of Robot Localization and Navigation Technology UBTech Robotics Corp Ltd. Shenzhen China Institute for Infocomm Research A*STAR Singapore Singapore

ISBN: (纸本)9783031262838

Previous relation-based losses in person re-identification (ReID) typically comprise two sequential steps: they firstly sample both positive pair and negative pair and then deploy constraints to simultaneously improve intra-identity compactness and inter-identity separability. However, existing relation-based losses usually place emphasis on exploring the relation between images and therefore consider only several pairs during each optimization. This inevitably leads to different convergence status for pairs of the same kind and brings about the intra-pair variance problem. Accordingly, we propose a novel Relation-Aware (RA) loss to address the intra-pair variance via exploring the informative relation across pairs. In brief, we introduce a macro-constraint and a micro-constraint. The macro-constraint encourages the separation of positive pair and negative pair via pushing far apart the two "centers" of the positive pair and the negative pair. The "center" of each kind of pair are obtained via averaging all the pairs of the same kind. The micro-constraint further enhances the compactness by minimizing the discrepancies among pairs of the same kind. The two constraints work cooperatively to relieve the intra-pair variance and improve the quality of pedestriansąŕ representation. Results of extensive experiments on three widely used ReID benchmarks, i.e., Market-1501, DukeMTMC-ReID and CUHK03, demonstrate that the RA loss brings improvements over existing relation-based losses. © 2023, The Author(s), under exclusive license to Springer Nature Switzerland AG.

关键词： Deep learning

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