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Molten salt synthesis,morphology modulation,and lithiation mechanism of high entropy oxide for robust lithium storage

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Journal of Energy Chemistry 2023年第11期86卷 536-545,I0011页

作者： Xuefeng Liu Honghong Wang Long Dong Kezhuo Li Haijun zhang Quanli Jia shaowei zhang Wen Lei The State Key Laboratory of Refractories and Metallurgy Wuhan University of Science and TechnologyWuhan 430081HubeiChina Henan Key Laboratory of High Temperature Functional Ceramics Zhengzhou UniversityZhengzhou 450052HenanChina College of Engineering Mathematics and Physical SciencesUniversity of ExeterExeter EX44QFUK Key Laboratory of Advanced Energy Materials Chemistry(Ministry of Education) Nankai UniversityTianjin 300071China

High entropy oxides(HEOs)with ideal element tunability and enticing entropy-driven stability have exhibited unprecedented application potential in electrochemical lithium ***,the general control of dimension and morphology remains a major ***,scalable HEO morphology modulation is implemented through a salt-assisted strategy,which is achieved by regulating the solubility of reactants and the selective adsorption of salt ions on specific crystal *** electrochemical properties,lithiation mechanism,and structure evolution of composition-and morphology-dependent HEO anode are examined in *** importantly,the potential advantages of HEOs as electrode materials are evaluated from both theoretical and experimental *** from the high oxygen vacancy concentration,narrow band gap,and structure durability induced by the multi-element synergy,HEO anode delivers desirable reversible capacity and reaction *** particular,Mg is evidenced to serve as a structural sustainer that significantly inhibits the volume expansion and retains the rock salt *** new perspectives are expected to open a window of opportunity to compositionally/morphologi cally engineer high-performance HEO electrodes.

关键词： High-entropy oxide Lithium-ion battery anode Molten salt Morphology modulation Structure stability

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Unrolling a rain-guided detail recovery network for single-image deraining

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Virtual Reality & Intelligent Hardware 2023年第1期5卷 11-23页

作者： Kailong LIN shaowei zhang Yu LUO Jie LING School of Computer Science Guangdong University of TechnologyGuangzhou 510006China

Background Owing to the rapid development of deep networks, single-image deraining tasks have progressed significantly. Various architectures have been designed to recursively or directly remove rain, and most rain streaks can be removed using existing deraining methods. However, many of them cause detail loss, resulting in visual artifacts. Method To resolve this issue, we propose a novel unrolling rain-guided detail recovery network(URDRN) for single-image deraining based on the observation that the most degraded areas of a background image tend to be the most rain-corrupted regions. Furthermore, to address the problem that most existing deep-learningbased methods trivialize the observation model and simply learn end-to-end mapping, the proposed URDRN unrolls a single-image deraining task into two subproblems: rain extraction and detail recovery. Result Specifically, first, a context aggregation attention network is introduced to effectively extract rain streaks;thereafter, a rain attention map is generated as an indicator to guide the detail recovery process. For the detail recovery sub-network, with the guidance of the rain attention map, a simple encoder–decoder model is sufficient to recover the lost *** on several well-known benchmark datasets show that the proposed approach can achieve performance similar to those of other state-of-the-art methods.

关键词： Image deraining Rain attention Detail recovery Unrolling network Context aggregation attention

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Preparation of Hollow ZrB_2 Spheres by a Combined Sol-gel and Boro/carbothermal Reduction Method

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China's Refractories 2017年第3期26卷 43-48页

作者： CAO Yingnan zhang Haijun zhang shaowei State Key Laboratory of Advanced Refractories Sinosteel Luoyang Institute of Refractories Research Co.Ltd. The State Key Laboratory of Refractories and Metallurgy Wuhan University of Science and Technology

Carbon microspheres were firstly prepared using glucose （C6H12O6 ） as the starting materials by hydrotherreal carbonization. Then hollow ZrB2 spheres were successfully synthesized using zirconium oxychloride （ ZrClO2 · 8H2O）, boric acid （ H3BO3 ） by a combined solgel and boro/carbothermal reduction method, and the prepared carbon microspheres as the template. The effects of the reaction temperatures （1 200, 1 300, 1 400 and 1 500 ℃, respectively） and contents of carbon microspheres （ n （ C ）： n （ ZrO2 ＋ B2O3） is 5. 0, 5. 5, 6. 0 and 6. 5, respectively） on the synthesis of hollow ZrB2 spheres were studied. The prepared carbon microspheres have smooth sugrace and good hollow structure by hydrothermal nitridation. Increase of reaction temperature and excessive carbon microspheres can greatly promote the formation of hollow ZrB2 spheres. The optimized reaction temperature and molar ratio of n （C）/ n （ ZrO2 ＋ B2O3 ） were 1 500 ℃ and 6.5, respectively.

关键词： zirconium diboride boro/carbothermal sol - gel template hollow spheres

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High-yield production of carbon nanotubes from waste polyethylene and fabrication of graphene-carbon nanotube aerogels with excellent adsorption capacity

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Journal of Materials Science & Technology 2021年第35期94卷 90-98页

作者： Zhong Huang Yangfan Zheng Haijun zhang Faliang Li Yuan Zeng Quanli Jia Jun zhang Junyi Li shaowei zhang The State Key Laboratory of Refractories and Metallurgy Wuhan University of Science and TechnologyWuhan 430081China Henan Key Laboratory of High Temperature Functional Ceramics Zhengzhou UniversityZhengzhou 450052China College of Engineering Mathematics and Physical SciencesUniversity of ExeterExeter EX44QFUnited Kingdom

Waste plastics recycling and oil/organics remediation are environmental issues of global *** this work,a protectant was introduced,for the first time,to make highly efficient catalysts for pyrolysis of waste plastics into carbon nanotubes(CNTs)with high *** using waste polyethylene,Co(NO_(3))_(2) and oleylamine respectively as carbon source,catalyst precursor and protectant,a yield as high as 59.0%was *** CNTs exhibited a high adsorption capacity for methylene blue(up to 107.1 mg/g).Furthermore,by combining the CNTs with graphene oxide,a graphene-CNT aerogel with a low density of8.2 mg/cm^(3)and high porosity of 96.0%was successfully *** showed excellent hydrophobicity and mechanical stability,as well as high adsorption capacity of 289-410 g/g oil/organic solvent,which was much higher than most of these achieved by carbon-based three-dimensional materials reported previously,making the as-prepared aerogel a very promising adsorbent for oil/water separation.

关键词： Waste plastics Carbon nanotubes Pyrolysis Oleylamine Aerogel Oil/organics remediation

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Design of the Airbag Inflation System Applicable to Conventional and Autonomous Vehicles

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Automotive Innovation 2021年第4期4卷 390-399页

作者： Nina F.Yurchenko David S.Breed shaowei zhang Laboratory for Advanced Aerodynamics and Interdisciplinary Research Institute of HydromechanicsNational Academy of Sciences of Ukraine8/4 Zheliabov St.Kyiv 03680Ukraine Automotive Technologies International Inc.USA800 West AveUnit 545Miami BeachFL 33139USA Shanghai East Joylong Motor Airbag Co. Ltd.219#Qingda Road Pudong DistrictShanghaiChina

The emergency transformation of various aspects of life and business these days requires prompt evaluation of autonomous *** of the primary reassessments deals with the applicability of the vehicle passive safety system to the protec-tion of arbitrarily positioned *** mitigate possible risks caused by the simultaneous deployment of several big airbags,a new principle of their operation is ***,the aspirated inflator for a driver airbag is developed that can provide 50L-airbag inflation within 30-40 *** a result,about 3/4 of the air is to be entrained into an airbag from the vehicle *** process is initiated by a supersonic pulse jet(1/3 air volume)generated *** the Prandtl-Meyer problem formulation enables guiding linear and angular dimensions of the essential parts of the ***,a family of experimental models of varied geometry is fabricated and tested to determine their operational effectiveness in a range of motive pressure within~3-7 *** are performed on a specially designed facility equipped with compressed-air tanks and a high-speed valve to mimic the inflator operation with the pyrotechnic gas *** aspirated inflator operability is characterized using multivariate measurements of pressure fields,high-speed video-recording of the airbag inflation process,and evaluation of aspiration(entrainment)*** average volume aspiration ratio measured at 300 K is found to reach 2.8 and it’s expected to almost double at 1200 K.

关键词： Novel airbag system Aspirated inflator Air entrainment effectiveness Experimental investigations

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Structure and surface modification of MXene for efficient Li/K-ion storage

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Journal of Energy Chemistry 2022年第12期75卷 330-339,I0009页

作者： Keke Guan Long Dong Yingying Xing Xuke Li Jin Luo Quanli Jia Haijun zhang shaowei zhang Wen Lei The State Key Laboratory of Refractories and Metallurgy Wuhan University of Science and TechnologyWuhan 430081HubeiChina Henan Key Laboratory of High Temperature Functional Ceramics Zhengzhou UniversityZhengzhou 450052HenanChina College of Engineering Mathematics and Physical SciencesUniversity of ExeterExeter Ex44QFUnited Kingdom

In this paper,three-dimensional(3D)hollow Ti_(3)C_(2)T_(x)MXene tubes(HTCTs)with more–O terminal groups and fewer–F groups are successfully prepared via the template-oriented electrostatic self-assembly and the subsequent annealing *** obtained 3D hollow structure with large specific surface area,unique porous structure,and enlarged interlayer spacing could prevent the re-stacking of twodimensional(2D)sheets and shorten the diffusion pathway of ***,density functional theory(DFT)calculations and electrochemical tests reveal that Ti_(3)C_(2)O_(2)MXene possesses higher adsorption ability and lower diffusion barrier for K^(+)and Li^(+)compared to Ti_(3)C_(2)MXene dominated by–F terminal *** from the synergistic effect of the structural design and surface modification,the asprepared 3D HTCTs exhibit excellent electrochemical performance as anodes for K^(+)and Li^(+)storage compared with 2D Ti_(3)C_(2)T_(x)sheets(TCSs).

关键词： Hollow Ti_(3)C_(2)T_(x)tubes Surface modification Anodes K^(+)storage Li^(+)storage

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Chatter free sliding mode control of a chaotic coal mine power grid with small energy inputs

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International Journal of Mining Science and Technology 2012年第4期22卷 477-481页

作者： Xu Yanqing Jia Feng Ma Caoyuan Mao Jiasong zhang shaowei School of Information and Electrical Engineering China University of Mining&TechnologyXuzhou 221008China

An augmented proportional-integral sliding surface was designed for a sliding mode controller. A chatter free sliding mode control strategy for a chaotic coal mine power grid was developed. The stability of the control strategy was proven by Lyapunov stability theorem. The proposed sliding mode control strategy eliminated the chattering phenomenon by replacing the sign function with a saturation function, and by replacing the constant coefficients in the reaching law with adaptive ones. An immune genetic algorithm was used to optimize the parameters in the improved reaching law. The cut-in time of the controllers was optimized to reduce the peak energy of their output. Simulations showed that the proposed sliding mode controller has good, chatter flee performance.

关键词： Coal mine power gridChaosSliding mode controlChattering phenomenaEnergyImmune genetic algorithm

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Recent Progress of Carbon Nanotubes Reinforced MgO-C and Al_2O_3-C Refractories

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China's Refractories 2014年第4期23卷 16-21页

作者： WANG Junkai DENG Xiangong LI Faliang zhang Haijun zhang shaowei The State Key Laboratory of Refractories and Metallurgy Wuhan University of Science and Technology

Carbon nanotubes （CNTs） have been extensively studied over the last two decades since they possess excellent *** have been considered as new promising reinforcements for carbon containing refractories （CCRs）.Current research progress of the CNT-reinforced MgO-C and Al2O3-C refractories was summarized in this mini-review,and the CNT-reinforced CCRs possess remarkable mechanical properties and superior thermal shock resistance compared to CCRs without CNTs.

关键词： carbon nanotubes carbon containing refractories magnesia-carbon refractory alumina-carbon refractory

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Fabrication and Properties of Closed-pore Al_2O_3-based Refractory Aggregates

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China's Refractories 2018年第1期27卷 20-25页

作者： YUAN Lei YAN Zhengguo zhang Xiaodong YU Jingkun zhang shaowei School of Metallurgy Northeastern University College of Engineering Mathematics and Physical SciencesUniversity of Exeter

A novel Al2O3 based refractory aggregate with closed-pore structure was fabricated utilizing superplastic- ity with submicro-sized Al2O3 and MgO as raw materi- als, and SiC as a high temperature pore-forming agent. The effect of MgO on porosity, phase composition and microstructure of the refractory aggregate has been inves- tigated. For comparison, the common Al2O3-based refractory aggregates and porous ones with open-pore structure were also prepared. The results indicate that the closed porosity of Al2O3-based refractory aggregate in- creases as the content of MgO increases. When the con- tent of MgO is 15 mass%, the closed and apparent poros- ities are 14.5% and 1.1%, respectively. The main phase compositions are Al2O3 and MgAl204. The formation mechanism of closed pores is that the fine-crystalline- grain Al2O3 ceramic possesses superplastic deformation ability after adding MgO at high temperatures. When SiC powder is added to the Al2O3 ceramic, the generated gases by the reaction of SiC at the sintering temperature can provide a pressure to make grain boundaries slide. Then, the gases are enclosed by crystalline grains to form the closed pores. The slag corrosion resistance of the fabrica- ted closed-pore Al2O3-based refractory aggregate is better than the common refractory aggregate and porous ones.

关键词： alumina magnesium aluminate refractory aggregate closed pore superplasticity

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Synthesis of sulfur doped C_(3)N_(4) with enhanced photocatalytic activity in molten salt

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Journal of Materiomics 2021年第5期7卷 1131-1142页

作者： Keke Guan Junyi Li Wen Lei Honghong Wang Zhaoming Tong Quanli Jia Haijun zhang shaowei zhang The State Key Laboratory of Refractories and Metallurgy Wuhan University of Science and TechnologyWuhan430081China Henan Key Laboratory of High Temperature Functional Ceramics Zhengzhou UniversityZhengzhou450052China College of Engineering Mathematics and Physical SciencesUniversity of ExeterExeterEx44QFUnited Kingdom

In this paper,sulfur doped g-C_(3)N_(4)(S-g-C_(3)N_(4))was successfully prepared at 500℃ for 3 h via a modified molten salt method using dicyandiamide as the main raw material,trithiocyanuric acid as the sulfur source and LiBreKCl as the reaction *** as-prepared SeCN5.0% sample(the mass ratio of trithiocyanuric acid to dicyandiamide was 5.0%)composed of irregular flakes showed a band gap of 1.83 eV,which was narrower than that(2.55 eV)of pristine g-C_(3)N_(4).The SeCN5.0% sample also exhibited an outstanding absorption capacity of visible ***,the photodegradation rate toward methylene blue and tetracycline were respectively 10 and 20 times as high as that of bulk g-C_(3)N_(4) prepared by conventional heating methods,confirming its superior photocatalytic *** results can be attributed to that the replacement of lattice nitrogen with sulfur atom tuned the electronic structure of g-C_(3)N_(4),improved the absorption of visible light,optimized the separation of photogenerated electron-hole pairs,and consequently enhanced the photocatalytic activity of g-C_(3)N_(4).Moreover,the trapping experiments implied that hole(ht)and superoxide radical($O2)were the main active species in the process of photodegradation.

关键词： g-C_(3)N_(4) Sulfur doped Molten salt Methylene blue Tetracycline Photocatalytic activity

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