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High Conduction Band Inorganic Layers for Distinct Enhancement of Electrical Energy Storage in Polymer Nanocomposites

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Nano-Micro Letters 2022年第9期14卷 221-236页

作者： Yingke Zhu Zhonghui Shen Yong Li Bin Chai Jie Chen Pingkai Jiang Xingyi Huang Shanghai Key Laboratory of Electrical Insulation and Thermal Ageing State Key Laboratory of Metal Matrix CompositesDepartment of Polymer Science and EngineeringShanghai Jiao Tong UniversityShanghai 200240People’s Republic of China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Center of Smart Materials and DevicesWuhan University of TechnologyWuhan 430070People’s Republic of China Institute of Applied and Physical Chemistry and Center for Environmental Research and Sustainable Technology University of Bremen28359 BremenGermany

Dielectric polymer nanocomposites are considered as one of the most promising candidates for high-power-density electrical energy storage *** nanofillers with high insulation property are frequently introduced into fluoropolymer to improve its breakdown strength and energy storage ***,inorganic nanofillers are thought to introducing traps into polymer matrix to suppress leakage ***,how these nanofillers effect the leakage current is still ***,high dopant(>5 vol%)is prerequisite for distinctly improved energy storage performance,which severely deteriorates the processing and mechanical property of polymer nanocomposites,hence brings high technical complication and ***,boron nitride nanosheet(BNNS)layers are utilized for substantially improving the electrical energy storage capability of polyvinylidene fluoride(PVDF)*** reveal that the high conduction band minimum of BNNS produces energy barrier at the interface of adjacent layers,preventing the electron in PVDF from passing through inorganic layers,leading to suppressed leakage current and superior breakdown *** by improved Young’s modulus(from 1.2 GPa of PVDF to 1.6 GPa of nanocomposite),significantly boosted discharged energy density(14.3 J cm^(-3)) and charge-discharge efficiency(75%)are realized in multilayered nanocomposites,which are 340 and 300% of PVDF(4.2 J cm^(-3),25%).More importantly,thus remarkably boosted energy storage performance is accomplished by marginal *** work offers a new paradigm for developing dielectric nanocomposites with advanced energy storage performance.

关键词： Boron nitride nanosheet Conduction band Efficiency Energy density Barrier

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Aqueous batteries:from laboratory to market

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国家科学评论（英文版） 2023年第11期10卷 85-88页

作者： Xikun Zhang Pengcheng Xing Thomas L.Madanu Jing Li Jie Shu Bao-Lian Su Laboratory of Inorganic Materials Chemistry(CMI) University of NamurBelgium School of Materials Science and Chemical Engineering Ningbo UniversityChina Laboratory of Inorganic Materials Chemistry(CMI) University of NamurBelgium State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyChina

As estimated up to 2022,global installed capacity of lithium-ion batteries(LIBs)has increased dramatically from 148 to 580 GWh in the past five *** wide range of applications is mainly at-tributed to their high energy density,ex-cellent cycle life,and low self-discharge rate[1].However,with the continuous promotion of the applications in various fields,the limitations of LIBs have be-come apparent,such as high cost and safety issues.

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Stretchable wireless optoelectronic synergistic patches for effective wound healing

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npj Flexible Electronics 2024年第1期8卷 233-242页

作者： Qian Wang Siyuan Cai Guang Yao Liyuan Zhang Wenhao Lou Youxin Chen Qingqing Li Maowen Xie Xingyi Gan Chenzheng Zhou Taisong Pan Min Gao Kangning Zhao Zhen Cai Yuan Lin School of Materials and Energy University of Electronic Science and Technology of ChinaChengduSichuanChina Department of Plastic Surgery Sichuan Provincial People’s HospitalUniversity of Electronic Science and Technology of ChinaChengduSichuanChina Department of Plastic and Cosmetic Surgery Xinqiao HospitalArmy Medical UniversityChongqingChina State Key Laboratory of Electronic Thin Films and Integrated Devices University of Electronic Science and Technology of ChinaChengduSichuanChina Shenzhen Institute for Advanced Study University of Electronic Science and Technology of ChinaShenzhenGuangdongChina State Key Laboratory of Advanced Technology for Materials Synthesis and Processing International School of Materials Science and EngineeringWuhan University of TechnologyWuhanHubeiChina Medico-Engineering Cooperation on Applied Medicine Research Center University of Electronic Science and Technology of ChinaChengduSichuanChina

Physiotherapies play a crucial role in noninvasive tissue engineering for wound ***,challenges such as the implementation of complex interventions and unsatisfactory treatment outcomes impede widespread ***,we proposed a stretchable and wirelessly-powered optoelectronic synergistic patch with a dual-layer serpentine wireless receiver circuit to drive the optoelectronic modulation *** structure and impedance matching enable the patch to seamlessly attach to irregular skin surfaces and operate robustly over a 30%tensile strain *** on Sprague-Dawley rat wound *** wound closure rate of the optoelectronic synergistic group significantly outperformed both monointervention and blank control ***,optoelectronic synergistic intervention enhances the secretion of vascular endothelial marker proteins and growth factors,and stabilizes mitochondrial function during oxidative ***,the scalable amalgamation of flexible electronics,wireless transmission,and synergistic interventions promise to improve wound care.

关键词： optoelectronic synergistic healing

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Mechanisms of crack elimination in directed energy deposited MAR M247 superalloy and effects of laser power on microstructural evolution and mechanical properties

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materials Today Communications 2025年 46卷

作者： Chen, Mingzhang Liu, Xunchen Wang, Yitong Hua, Lin Hu, Zeqi School of Automotive Engineering Wuhan University of Technology Wuhan430070 China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan430070 China Hubei Key Laboratory of Advanced Technology for Automotive Components Wuhan430070 China

MAR M247 is a directionally solidified nickel-based superalloy with excellent high-temperature performance, but it suffers from severe cracking issues during the directed energy deposition (DED) process. Currently, much of the research on crack suppression in nickel-based superalloy has focused on IN738 and Hastelloy X, with limited studies specifically addressing the cracking suppression mechanisms for M247. This study investigates the mechanisms of crack elimination in M247 and the influence of laser power on its microstructural evolution and mechanical properties. Thermodynamic calculations indicate that M247 has higher crack sensitivity indices than IN718 and IN738, making crack suppression a critical challenge. By optimizing DED process parameters, particularly by reducing scan speed and increasing laser power, cracks were effectively eliminated. Numerical simulations reveal that these adjustments reduce thermal stress accumulation, thereby mitigating cracking. Microstructural characterization shows that increasing laser power minimizes internal defects, promotes a trend toward oriented grain growth, decreases transverse grain boundaries perpendicular to the deposition direction, reduces disorientation, promotes texture evolution, and increases Schmid factors. While tensile strength and microhardness remain largely unaffected, ductility is significantly improved. This paper provides valuable insights into crack elimination and mechanical property enhancement in additive manufactured nickel-based superalloy. © 2025 Elsevier Ltd

关键词： Tensile strength

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Thermoelectric Properties of an Individual Suspended Single-Crystalline Sb_(2)Se_(3)Nanowire

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Journal of Thermal Science 2022年第4期31卷 1106-1114页

作者： DU Yanzheng SHI Shaoyi MIAO Tingting MA Weigang MAI Liqiang ZHANG Xing Key Laboratory for Thermal Science and Power Engineering of Ministry of Education Department of Engineering Mechanics Tsinghua UniversityBeijing 100084China Beijing Key Laboratory of Process Fluid Filtration and Separation College of Mechanical and Transportation EngineeringChina University of PetroleumBeijing 102249China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan430070China

Nanowires exhibit excellent thermoelectric performance,due to the stronger quantum confinement and phonon scattering effect compared to bulk ***,it is a challenge to accurately evaluate the thermoelectric performance of *** this paper,the thermoelectric properties of an individual suspended Sb_(2)Se_(3) nanowire have been characterized by comprehensive T-type method,including thermal conductivity,electrical conductivity,Seebeck coefficient and figure of *** thermal conductivity increases from 0.57 W/(m·K)to 3.69 W/(m·K)with temperature increasing from 80 K to 320 *** lattice vibration dominates the heat conduction process,and due to its flawless crystal structure,the thermal conductivity is not lower than the reported values of bulk Sb_(2)Se_(3).The electrical conductivity increases from 7.83 S/m to 688 S/m in the temperature range of 50 K–320 K,which is a great improvement compared with the corresponding bulk *** 294 K,the Seebeck coefficient of the Sb_(2)Se_(3) nanowire is–1120μV/K and the corresponding figure of merit is 0.064.

关键词： Sb_(2)Se_(3)nanowire thermoelectric properties thermal conductivity Seebeck coefficient electrical conductivity

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In situ STEM Observation of Cation Diffusion and Surface Reconstruction at van der Waals Gaps

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Microscopy and microanalysis : the official journal of Microscopy Society of America, Microbeam Analysis Society, Microscopical Society of Canada 2023年第1期29卷 1642-1643页

作者： Cui, Wenjun Lin, Weixiao Lu, Weichao Liu, Chengshan Gao, Zhixiao Ma, Hao Zhao, Wen Van Tendeloo, Gustaaf Sang, Xiahan State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan China Nanostructure Research Center Wuhan University of Technology Wuhan China School of Materials Science and Engineering China University of Petroleum (East China) Qingdao Shandong China Electron Microscopy for Materials Science (EMAT) University of Antwerp Antwerp Belgium

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1800℃下具有优异高强度且含氧化物杂质的高熵二硼化物陶瓷

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Science China materials 2023年第5期66卷 2061-2070页

作者：柳洁杨青青邹冀王为民王新刚傅正义 State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China Hubei Longzhong Laboratory Xiangyang 441000China Shanghai Institute of Ceramics Chinese Academy of SciencesShanghai 201899China

以硼热/碳热还原合成高熵二硼化物粉体为原料,在2000℃/单轴加压50 MPa条件下,经10分钟放电等离子烧结,成功制备了含有~2 vol%的氧化物和~1 vol%气孔的高熵(Ti_(0.2)Zr_(0.2)Nb_(0.2)Hf_(0.2)Ta_(0.2))B_(2)陶瓷(HEBs).经研究确认,其中... 详细信息

以硼热/碳热还原合成高熵二硼化物粉体为原料,在2000℃/单轴加压50 MPa条件下,经10分钟放电等离子烧结,成功制备了含有~2 vol%的氧化物和~1 vol%气孔的高熵(Ti_(0.2)Zr_(0.2)Nb_(0.2)Hf_(0.2)Ta_(0.2))B_(2)陶瓷(HEBs).经研究确认,其中残留氧化物是固溶少量硼和碳的m-(Hf,Zr)O_(2).室温下HEBs的弹性模量、维氏硬度和断裂韧性分别为508.5 GPa、17.7±0.4 GPa和4.2±0.2 MPa m^(1/2).烧结得到的HEBs具有优良的抗弯强度,特别是其高温强度.HEBs在室温、1600和1800℃下的四点抗折强度分别为400.4±47.0 MPa、695.9±55.9 MPa和751.6±23.2 MPa.对1800℃下断裂的HEBs样品进行了失效分析,在其拉伸和断裂面附近区域,仅在裂纹尖端和孔隙边缘发现了数量有限的位错线的存在,没有观察到位错运动的痕迹.本研究首次报道了高熵二硼化物陶瓷的高温强度,发现其强度直至1800℃并无衰减,并对其高温下的强韧化机制进行了有益的探讨.

关键词： borides high-entropy ceramics high-temperature strength mechanical properties microstructure

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Abnormal Shrinkage Behavior and Sintering Mechanism of Alumina Nanoparticles

SSRN

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SSRN 2024年

作者： Wang, Dangqiang Li, Jun Liu, Lisheng Mei, Hai Zhang, Jinyong Hubei Key Laboratory of Theory and Application of Advanced Materials Mechanics Wuhan University of Technology Wuhan China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan China

In ultrafast high-temperature sintering process, the green body can be rapidly densified during the heating stage, and many experimental researches prove that sintering temperature and heating rate play an important role. Thus, to further explore the synergistic effect of sintering temperature and heating rate on densification process and reveal the underlying mechanism, equal-sized and unequal-sized alumina nanoparticles are selected to perform molecular dynamic simulations, and sintering behaviors, microstructure evolution, atomic migration and diffusion activation entropy are monitored during heating stages. Results show that high temperature leads to the amorphization of crystal structure of nanoparticles, and fast heating rate retains large sintering driving force at high temperature, making it easier for atoms to cross the migration barrier, thereby, in addition to the enhancement of surface, lattice and interface diffusion, the appearance of viscous flow accelerate the polymerization process of the nanoparticles, leading to two different abnormal shrinkage behaviors. These findings are expected to lay the theoretical foundation for the development and popularization of ultrafast high-temperature sintering (UHS) technology. © 2024, The Authors. All rights reserved.

关键词： Heating rate

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Rechargeable metal(Li, Na, Mg, Al)-sulfur batteries: materials and advances

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Journal of Energy Chemistry 2021年第10期30卷 104-134,I0004页

作者： Xue Liu Yan Li Xu Xu Liang Zhou Liqiang Mai State Key Laboratory of Advanced Technology for Materials Synthesis and Processing International School of Materials Science and EngineeringWuhan University of TechnologyWuhan 430070HubeiChina Foshan Xianhu Laboratory of the Advanced Energy Science and Technology Guangdong Laboratory Xianhu Hydrogen ValleyFoshan 528200GuangdongChina

Energy and environmental issues are becoming more and more severe and renewable energy storage technologies are vital to solve the *** metal(Li,Na,Mg,Al)-sulfur batteries with low-cost and earth-abundant elemental sulfur as the cathode are attracting more and more interest for electrical energy storage in recent ***-sulfur(Li-S),room-temperature sodium-sulfur(RT Na-S),magnesium-sulfur(Mg-S)and aluminum-sulfur(Al-S)batteries are the most prominent candidates among *** obvious obstacles are hampering the developments of metal-sulfur ***-S and Na-S batteries are encumbered mainly by anode dendrite issues,polysulfides shuttle and low conductivity of ***-S and Al-S batteries are short of suitable *** this review,relationships between various employed nanostructured materials and electrochemical performances of metal-sulfur batteries have been ***,the selections of suitable electrolytes,anode protection,separator modifications and prototype innovations are all crucial to the developments of metal-sulfur batteries and are discussed at the same ***,we give a review on the advances of Li-S,RT Na-S,Mg-S and Al-S batteries from the point of view of materials,and then focus on perspectives of their future developments.

关键词： Lithium sulfur batteries Sodium sulfur batteries Magnesium sulfur batteries Aluminum sulfur batteries Energy materials

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Potential-Dependent Activities in Interpreting the Reaction Mechanism of Dual-Metal Atom Catalysts for Li-Co2 Batteries

SSRN

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SSRN 2024年

作者： Liu, Xiaolin Zhou, Mengjun Liao, Xiaobin Zhao, Yan State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan430070 China State Key Laboratory of Silicate Materials for Architectures Wuhan University of Science and Technology China

The utilization of CO2 electrochemistry in energy storage has been considered as a promising power source due to its high theoretical energy density, high electrochemical potential, and ability to fix CO2. However, the low efficiency and poor reversibility of Li-CO2 evolution significantly impede the applications of Li-CO2 batteries. Herein, first-principles calculations were employed to investigate the 21 M1M2N4C active sites and explore the catalytic mechanism for the Li-CO2 evolution reaction. The adsorption and activation of CO2 on the thermodynamically stable DACs show that the TM atoms in M1M2N4C center sites with decreasing d-band center appeared to increase CO2 adsorption energy. Among the active sites, the MoMoN4C shows the most robust activation interaction with CO2 due to its high d-center and strong d-p orbital coupling. The implicit solvent CEP simulations verify the effects of dual-atom sites on the products' activities and selectivity by searching the possible reaction pathways toward the battery-discharging processes in the ether electrolyte. The decomposition of *Li2CO3 was simulated by the NEB calculations. The results prove that the MoMoN4C active site can boost the reaction dynamics and exhibit high reversibility for the Li-CO2 battery. © 2024, The Authors. All rights reserved.

关键词： Carbon dioxide

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