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Development prospects of metal-based two-dimensional nanomaterials in lithium-sulfur batteries

Chinese Chemical Letters 2023年第1期34卷 102-113页

作者： Yuxue Mo Liling Liao Dongyang Li Rongwu Pan Yanhong Deng Yanliang Tan Haiqing Zhou College of Physics and Electronic Engineering Hengyang Normal UniversityHengyang 421002China Key Laboratory of Low-Dimensional Quantum Structures and Quantum Control of Ministry of Education Key Laboratory for Matter Microstructure and Function of Hunan ProvinceDepartment of Physics and Synergetic Innovation Center for Quantum Effects and ApplicationsHunan Normal UniversityChangsha 410081China Hunan Joint International Laboratory of Advanced Materials and Technology for Clean Energy Changsha 410082China Hunan Shengli High-tech Energy Technology Co. Ltd.Yongzhou 425000China Hunan Provincial Key Laboratory of Intelligent Information Processing and Application Hengyang 421002China

A lithium-sulfur(Li-S)system is an important candidate for future lithium-ion system due to its low cost and high specific theoretical capacity(1675 m Ah/g,2600 Wh/kg),which is greatly hindered by the poor conductivity of sulfur,large volume change and dissolution of lithium ***-dimensional(2D)materials with monolayers or few-layers usually have peculiar structures and physical/chemical properties,which can resolve the critical issues in Li-S ***,the metal-based 2D nanomaterials,including ferrum,cobalt or other metal-based composites with various anions,can provide high conductivity,large surface area and abundant reaction sites for restraining the diffusion for lithium *** this mini-review,we will present an overview of recent developments on metal-based 2D nanomaterials with various anions as the electrode materials for Li-S *** the main bottleneck for the Li-S system is the shuttle of polysulfides,emphasis is placed on the structure and components,physical/chemical interaction and interaction mechanisms of the 2D ***,the challenges and prospects of metal-based 2D nanomaterials for Li-S batteries are discussed and proposed.

关键词： Lithium-sulfur battery Two-dimensional materials Cathode materials Anode materials Anode protection

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Core–shell spherical graphite@SiC attenuating agent for AlN-based microwave attenuating ceramics with high–efficiency thermal conduction and microwave absorption abilities

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Ceramics International 2023年第15期49卷 25063-25073页

作者： Fang, Xia Hou, Shoujun Pan, Limei Yin, Shuang Wang, Yang Li, Quan Chen, Dapeng Jin, Junyang Yang, Jian Jiangsu Collaborative Innovation Center for Advanced Inorganic Function Composites Nanjing Tech University Nanjing 211816 China College of Materials Science and Engineering Nanjing Tech University Nanjing 211816 China Science and Technology on Optical Radiation Laboratory Beijing 100854 China Key Lab of Light Weight Materials Nanjing Tech University Nanjing 211816 China

A core–shell structured spherical graphite (SG)@SiC attenuating agent with a tunable silicon carbide (SiC) shell thickness was synthesized via in-situ solid-liquid reaction of SG and Si. Then, fully dense 10 wt%SG@SiC/AlN microwave attenuating composite ceramics were prepared through hot-pressing sintering, and the morphology of SG@SiC particle was well maintained. By moderately modulating the thickness of the SiC shell with relatively low complex permittivity and thermal conductivity, an effectively inhibited solid solution of SiC into AlN, weakened dipole and electron polarization, enhanced conduction loss, and an improved impedance matching, thermal conductivity and microwave loss capacity were simultaneously achieved. Thus, the SG@SiC/AlN composite exhibit excellent and impressive thermal conductivity of 63.92 W m⁻¹·K⁻¹ and minimum reflection loss of −34.2 dB. The outstanding performance of SG@SiC/AlN composite indicates that the composite is promising microwave attenuating ceramic with excellent thermal conduction and microwave absorption ability. This work opens up a new core–shell structure strategy for designing and developing a high-efficiency attenuating agent and microwave attenuating ceramic. © 2023 Elsevier Ltd and Techna Group S.r.l.

关键词： Aluminum nitride Core-shell structure Microwave absorption Silicon carbide

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High-Performance Green Quasi-2D Perovskite Light-Emitting Diodes via Passivated Defects

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advanced Optical materials 2024年第13期12卷

作者： Yang, Wei Ban, Xin-Xin He, Xiao-Li Huang, Xin-Mei Wang, Xiao-Yu Zhang, Yong Gao, Chun-Hong School of Physics and Materials Science Guangzhou University Guangzhou510006 China School of Physical Science and Technology MOE key laboratory on Luminescence and Real-Time Analysis Southwest University Chongqing400715 China School of Environmental and Chemical Engineering Jiangsu Key Laboratory of Function Control Technology for Advanced Materials Jiangsu Ocean University Jiangsu Lianyungang222005 China

In next generation semiconductors, metal halide perovskite materials would replace traditional light-emitting materials since their exceptional photoelectronic characteristics. The future development of perovskite light-emitting diodes have generated challenges such as abundant surface or interfacial defects and exciton quenching. To overcome these challenges, the light-emitting layer is modified utilizing benzimidazole/phosphine oxide hybrid 1,3,5-tris(1-(4-(diphenylphenylphosphoryl)phenyl)-1H-benzo[d]imidazol-2-yl)benzene (TPOB) and 1,3,5-tris(diphenylphosphoryl)benzene (TPO) with high triple energy state. It is demonstrated by X-ray photoelectron spectroscopy results that the oxygen atoms in the P = O functional group of TPOB and TPO provided lone electron pairs coordinate to the unsaturated Pb2+ in turn led to a decrease in the electron cloud density of Pb2+ and Br-, which can suppress defects. Additionally, this technique improved the morphology of film, reduced surface roughness, and facilitated carrier transport, all of which are crucial for achieving high-emission efficiency. As a result, the optimal devices has EQEs of 16.20 (TPOB) and 20.48% (TPO), respectively. Furthermore, the devices demonstrated excellent reproducibility. Excitingly, the champion EQE value for the optimal device is 22.64%. Simultaneously, it can increase the stability of the devices and the lifetimes are increased from 1231 s (Pristine) to 5421 (TPOB) and 5631 s (TPO). © 2024 Wiley-VCH GmbH.

关键词： Metal halides

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Plating current density distribution of lithium metal anodes in pouch cells

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Journal of Energy Chemistry 2022年第6期31卷 70-75,I0003页

作者： Shi-Jie Yang Xin Shen Xin-Bing Cheng Feng-Ni Jiang Rui Zhang He Liu Lei Liu Hong Yuan School of Materials Science&Engineering Beijing Institute of TechnologyBeijing 100081China Beijing Key Laboratory of Green Chemical Reaction Engineering and Technology Department of Chemical EngineeringTsinghua UniversityBeijing 100084China Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education School of Energy and EnvironmentSoutheast UniversityNanjing 211189JiangsuChina School of Chemistry and Materials Science Nanjing University of Information Science&TechnologyNanjing 210044JiangsuChina Advanced Research Institute of Multidisciplinary Science Beijing Institute of TechnologyBeijing 100081China College of Chemistry and Chemical Engineering Taiyuan University of TechnologyTaiyuan 030024ShanxiChina

The uniformity of current density distribution upon electrodes is one of the most important factors determining the lithium dendrites growth and cycling performance of lithium metal batteries(LMBs). Herein,current density distributions of lithium metal anodes induced by various engineering factors, consisting of uneven cathode, electrolyte distribution, and different tab positions, and their effects on the electrochemical performance are investigated theoretically and experimentally in pouch cells. The deviation of current density in lithium metal anodes ranges from 2.47% to 196.18% due to the different levels of uneven cathode materials. However, the deviation is just 13.60% for different electrolyte thicknesses between cathodes and anodes, even a ten-layer separator in some positions. The maximum deviation for variational tab positions is only 0.17%. The nonuniformity in current density distribution results in severe dendrite growth issues and poor electrochemical performance of LMBs. This work not only confirms the direct correlation between the uneven current density distribution and lithium deposition behaviors, but also points out the decisive effects of cathode surface roughness on current distribution of anodes, to which more attentions should be paid in practical applications of LMBs.

关键词： Pouch cell Lithium metal anode Dendrite Current density distribution Safety

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In situ formation of highly dispersed LaH3 and Mg2Ni derived from 3DOM LaNiO3 for the hydrogen storage kinetics enhancement of MgH2

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Journal of Alloys and Compounds 2025年 1032卷

作者： Liu, Yana Zhu, Yu Tang, Qinke Shen, Xinkang Zhu, Yunfeng Zhang, Jiguang Wang, Jun Ba, Zhixin Cai, Wenrong Huang, Yuting Hu, Xiaohui College of Materials Science and Engineering Nanjing Tech University 30 South Puzhu Road Nanjing211816 China Jiangsu Collaborative Innovation Centre for Advanced Inorganic Function Composites Nanjing Tech University Nanjing211816 China School of Materials Science and Engineering Nanjing Institute of Technology Nanjing211167 China Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology Changzhou University 213164 China

(3DOM) LaNiO3 catalysts were successfully synthesized and significantly improved the hydrogen storage kinetics of MgH2. MgH2-5 wt% 3DOM LaNiO3 can rapidly absorb 5.91 wt% H2 at 175 °C within 500 s and desorb 6.37 wt% H2 within 500 s at 300 °C, its hydrogen absorption and desorption rates are 10 and 11 times higher than MgH2-5 wt% Nano LaNiO3, respectively. This remarkable enhancement is primarily due to its unique 3DOM structure and the synergistic effect of highly dispersed LaH3 and Mg2Ni/Mg2NiH4 formed in situ during the ball milling and first de/re-hydrogenation process. 3DOM structure catalysts are fragile which can make the catalyst distribution more uniform during ball milling process, giving rise to the significantly improved catalytic activity. The theoretical calculation results show that Mg2Ni/LaH3 heterostructure can greatly reduce the hydrogen adsorption energy to −0.768 eV and the heterogeneous interface induces the charge redistribution between Mg2Ni and LaH3, resulting in a small amount of negative charge accumulating on the surface of Mg2Ni. Moreover, highly dispersed LaH3 and Mg2Ni/Mg2NiH4 in the MgH2 matrix create a multiphase interface, which can provide more active sites and a variety of pathways for hydrogen diffusion. Above reasons contribute to the excellent synergistic catalytic performance of in situ formed LaH3 and Mg2Ni/Mg2NiH4 on MgH2. These discoveries hold scientific value for the design and preparation of highly active catalysts using 3DOM materials for hydrogen storage in light-metal hydrides, especially in MgH2. © 2025 Elsevier B.V.

关键词： Milling (machining)

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Image Denoising of Fishing Nets Underwater with Range Selection Based on Convolutional Sparse Coding

Image Denoising of Fishing Nets Underwater with Range Select...

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Computer Engineering and Intelligent Communications (ISCEIC), International Symposium on

作者： Sheng Wu Chao Liu Honglei Zhang Enyue Duan Nian Jiang Yantai Research Institute Harbin Engineering University Jiangsu Key Laboratory of Function Control Technology for Advanced Materials Jiangsu Ocean University Jiangsu China Marine Photoelectric Imaging Project Team Shandong Aerospace electronic Technology Institute Shandong China

The underwater detection imaging technology mainly includes sonar imaging and underwater optical imaging. In order to overcome the disadvantages of low resolution of sonar imaging and short detection range of traditional optical imaging, optical gating technology is applied to underwater fishing net detection. This technology has higher resolution compared to sonar imaging, and its detection range has also been shown to be three times larger than that of conventional optical imaging. However, underwater range gating imaging can suffer from large random noise and low signal-to-noise ratio. In order to solve this problem, this paper proposes a convolutional sparse coding denoising neural network based on deep learning to improve image quality. This network consists of a local residual channel and a global convolutional sparse coding channel. Compared with DnCNN, ECNDNet and other methods, the average Peak signal-to-noise ratio of the proposed method is improved by 1.57~2.11dB, which can effectively remove random noise and reconstruct clear underwater fishing net range-gated images.

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Novel lead-free NaNbO_(3) -based relaxor antiferroelectric ceramics with ultrahigh energy storage density and high efficiency

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Journal of Materiomics 2022年第2期8卷 295-301页

作者： Jie Jiang Xiongjie Li Ling Li Shun Guo Ji Zhang Jing Wang Heguo Zhu Yiping Wang Shan-Tao Zhang School of Materials Science and Engineering Nanjing University of Science and TechnologyNanjing210094China State Key Laboratory of Mechanics and Control of Mechanical Structures College of Aerospace EngineeringNanjing University of Aeronautics and AstronauticsNanjing 210016China National Laboratory of Solid State Microstructures Department of Materials Science and EngineeringCollege of Engineering and Applied Science&Jiangsu Key Laboratory of Artificial Functional Materials&Collaborative Innovation Center of Advanced MicrostructuresNanjing UniversityNanjing 210093China

The development of environmentally friendly ceramics for electrostatic energy storage has drawn growing interest due to the wide application in high power and/or pulsed power electronic ***,it is difficult to simultaneously achieve ultrahigh recoverable energy storage density(W rec>8 J/cm^(3))and high efficiency(η>80%),which restricts their application in the miniaturized,light weight and easy integrated electronic ***,the novel NaNbO_(3)-(Bi_(0.8)Sr_(0.2))(Fe_(0.9) Nb_(0.1))O_(3) relaxor antiferro-electric ceramics,which integrates the merits of antiferroelectrics and relaxors,are demonstrated to exhibit stabilized antiferroelectric phase and enhanced dielectric relaxor *** particular impor-tance is that the 0.88NN-0.12BSFN ceramic achieves giant electric breakdown strength E_(b)=98.3 kV/mm,ultrahigh W _(rec)=16.5 J/cm^(3) and high h=83.3%,as well as excellent frequency,cycling and thermal reliability *** comprehensive energy storage performance of NN-BSFN not only out-performs state-of-the-art dielectric ceramics by comparison,but also displays outstanding potential for next-generation energy storage capacitors.

关键词： Lead-free NaNbO_(3) Relaxor antiferroelectric Energy storage property

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Preferred orientation induced high efficiency dehydrogenation of metal hydrides

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Journal of materials Science & technology 2026年 241卷 238-244页

作者： Qinke Tang Mengran Li Yunfeng Zhu Jiaxiang Xu Xingyue Fang Jiangchuan Liu Jialing Gu Rui Shi Yao Zhang Jiguang Zhang Yana Liu Xiaohui Hu Jun Wang College of Materials Science and Engineering Jiangsu Collaborative Innovation Centre for Advanced Inorganic Function Composites Nanjing Tech University Nanjing 211816 China School of Materials Science and Engineering Jiangsu Key Laboratory of Materials Surface Science and Technology CNPC-CZU Innovation Alliance Changzhou University Changzhou 213164 China School of Materials Science and Engineering Southeast University Nanjing 211189 China

Magnesium nickel hydrides are regarded as advanced metal hydride functional materials in hydrogen storage, while it is hard to improve their dehydrogenation kinetics and ensure the air-exposure stability at the same time. Herein, a novel and efficient method was developed to prepare highly active and antioxidative bulk magnesium nickel hydrides by quenching. Differential scanning calorimetry (DSC) test shows that quenching at 280 °C can decrease the dehydrogenation peak temperature of Mg 2 NiH 4 from ∼345 °C to ∼260 °C. The quenched Mg 2 NiH 4 can dehydrogenate completely at 230 °C within only 250 s and at 215 °C within 1000 s, respectively. Interestingly, an obvious preferred orientation of (420) diffraction index of Mg 2 NiH 4 was found after quenching treatment, which is positively correlated with the free energy of hydrogen desorption, as indicated by ab-initio simulation, thus improving the dehydrogenation performance greatly. Moreover, the quenched sample also exhibits a stable air-exposure performance. There is even a slight decrease in the dehydrogenation peak temperature after air exposure for 7 days. The results provide a novel insight into the design of bulk magnesium nickel hydrides with high activity and the analysis of the corresponding dehydrogenation mechanism.

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Thermally Activated Delayed Fluorescence Dendrimers with Aie Property and functional Dendrons for High-Efficiency Solution-Processed White Oleds

SSRN

引用

SSRN 2022年

作者： Zhang, Kaizhi Zhou, Tao Cao, Qingpeng Ge, Fengjie Xu, Hui Chu, Jierui Wang, Jiayi Pei, Ming Ban, Xinxin Zhang, Tianlin School of Environmental and Chemical Engineering Jiangsu Ocean University Jiangsu Lianyungang222005 China Jiangsu Key Laboratory of Function Control Technology for Advanced Materials Jiangsu Lianyungang222000 China

Thermally activated delayed fluorescence (TADF) materials with encapsulation dendrons have exhibited superior advantages in the solution-processed OLEDs. Herein, we utilized electron-donating carbazole and electron-withdraw phenylbenzimidazole as the peripheral wrapping unit to design and synthesize two TADF materials, TRZCz-Cz and TRZCz-Bz, to discuss the distinction about different encapsulations for one identical emissive core. The photophysical investigation demonstrate that both compounds have small ΔE ST and clearly AIE properties, which are benefit for enhancing the exciton unitization of electroluminescence devices. Despite similar characters in photophysical property, the blue phosphorescence OLEDs host with TRZCz-Cz obtain the maximum current efficiency and external quantum efficiency of 38.6 cd A -1 and 18.4%, respectively, which far exceed TRZCz-Bz based one. Thanks to the high performance of blue device, the fully phosphorescent white OLEDs with Ir(MDQ) 2 (acac) as red phosphor dopant achieves the maximum luminescence, current efficiency, external quantum efficiency as high as 12874 cd m -2 , 33.8 cd A -1 and 16.5%, respectively, which are among the highest efficiency of solution-processed white OLEDs. Moreover, the hybrid white OLEDs with TADF as blue host and red phosphor as dopant was also achieved with a low turn-on voltage of 3.2 V, and more standard white emission with CIE coordinate of (0.34,0.33). Thus, this work significantly extends the range of AIE TADF materials and paves the useful way for the fabrication of high efficiency white OLEDs through solution-process. © 2022, The Authors. All rights reserved.

关键词： Fluorescence

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Dual-layer vermiculite nanosheet based hybrid film to suppress dendrite growth in lithium metal batteries

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Journal of Energy Chemistry 2022年第6期31卷 205-210,I0006页

作者： Xiang-Qun Xu Feng-Ni Jiang Shi-Jie Yang Ye Xiao He Liu Fangyang Liu Lei Liu Xin-Bing Cheng Beijing Key Laboratory of Green Chemical Reaction Engineering and Technology Department of Chemical EngineeringTsinghua UniversityBeijing 100084China Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education School of Energy and EnvironmentSoutheast UniversityNanjing 211189JiangsuChina School of Metallurgy and Environment Central South UniversityChangsha 410083HunanChina School of Chemistry and Materials Science Nanjing University of Information Science&TechnologyNanjing 210044JiangsuChina Advanced Research Institute of Multidisciplinary Science Beijing Institute of TechnologyBeijing 100081China College of Chemistry and Chemical Engineering Taiyuan University of TechnologyTaiyuan 030024ShanxiChina

Lithium metal anode has become a favorable candidate for next-generation rechargeable ***, the unstable interface between lithium metal and electrolyte leads to the growth of dendrites,resulting in the low Coulombic efficiency and even the safety concerns. Herein, a rigid-flexible dual-layer vermiculite nanosheet(VN) based organic-inorganic hybrid film on lithium metal anode is proposed to suppress dendrite growth and relieve volume fluctuations. The inner mechanically robust VN layer(3 μm thick) enhances the mechanical properties of the protective layer, while the outer polymer(4 μm thick) can enhance the flexibility of the hybrid layer. The Li | Li symmetric cell with protected lithium shows an extended life of over 670 h. The full cell with Li anode protected by dual-layer interface exhibits a better capacity retention of 80% after 174 cycles in comparison to bare Li anode with 94 *** study provides a novel approach and a significant step towards prolonging lifespan of lithium metal batteries.

关键词： Lithium metal anode Dendrite Organic-inorganic hybrid layer Dual-layer interface Two-dimensional vermiculite nanosheet

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