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SSRN 2024年

作者： Li, Yu Shi, Wen-Hua Yin, Zhi-Wen Wang, Meng Liu, Jing Hu, Zhi-Yi Li, Bei Chen, Li-Hua Su, Bao-Lian State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Hubei Wuhan430070 China Wuhan University of Technology Hubei Wuhan430070 China School of Materials Science and Engineering Research Center for Materials Genome Engineering Wuhan University of Technology Hubei Wuhan430070 China University of Namur NamurB-5000 Belgium

Silicon (Si) anode material is promising in the next generation of lithium-ion batteries (LIBs) with high energy densities for its much higher capacity (4200 mAh/g) than that of commercial graphite (372 mAh/g). However, silicon anode material with low electronic conductivity suffers a huge volume variation and accompanies side reactions during alloyed and de-alloyed process. Here, we design an inner amorphous titanium dioxide (TiO2) and an outer flexible conductive polyaniline (PANI) network dual modified Si@TiO2@PANI material for LIBs, where the TiO2 avoids the side reactions and the PANI network layer buffers the volume expansion and increases the electronic conductivity. The as-prepared Si@TiO2@PANI exhibits a high initial discharge capacity of 3050 mAh/g and maintains 1583 mAh/g after 200 cycles at 0.5 A/g. It even delivers the discharge capacity of 1002 mAh/g after 600 cycles at 1 A/g, as well as an excellent rate ability with discharge capacity of 1890, 1260 and 432 mAh/g at the high current density of 1, 2 and 5 A/g, respectively. Our strategy shows that the innovative design of double buffer layers on Si can synergistically promote stability and accelerate kinetics of Li+ transport, offering novel resolution strategy to enhance the performance of Si-based anodes for LIBs. © 2024, The Authors. All rights reserved.

关键词： Titanium dioxide

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Application of novel nanobubble-contained electrolyzed catalytic water to cleanup petroleum-hydrocarbon contaminated soils and groundwater: A pilot-scale and performance evaluation study

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Journal of Environmental Management 2023年 347卷 119058页

作者： Ho, Wing-Sze Lin, Wei-Han Verpoort, Francis Hong, Kun-Liang Ou, Jiun-Hau Kao, Chih-Ming Institute of Environmental Engineering National Sun Yat-Sen University Kaohsiung Taiwan State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan China Suzhou Dingdedian Environmental Protection Technology Co. Ltd. Suzhou China

Soil and groundwater contamination caused by petroleum hydrocarbons is a severe environmental problem. In this study, a novel electrolyzed catalytic system (ECS) was developed to produce nanobubble-contained electrolyzed catalytic (NEC) water for the remediation of petroleum-hydrocarbon-contaminated soils and groundwater. The developed ECS applied high voltage (220 V) with direct current, and titanium electrodes coated with iridium dioxide were used in the system. The developed ECS prototype contained 21 electrode pairs (with a current density of 20 mA/cm2), which were connected in series to significantly enhance the hydroxyl radical production rate. Iron-copper hybrid oxide catalysts were laid between each electrode pair to improve the radical generation efficiency. The electron paramagnetic resonance (EPR) and Rhodamine B (RhB) methods were applied for the generated radical species and concentration determination. During the operation of the ECS, high concentrations of nanobubbles (nanobubble density = 3.7 × 109 particles/mL) were produced due to the occurrence of the cavitation mechanism. Because of the negative zeta potential and nano-scale characteristics of nanobubbles (mean diameter = 28 nm), the repelling force would prevent the occurrence of bubble aggregations and extend their lifetime in NEC water. The radicals produced after the bursting of the nanobubbles would be beneficial for the increase of the radical concentration and subsequent petroleum hydrocarbon oxidation. The highly oxidized NEC water (oxidation-reduction potential = 887 mV) could be produced with a radical concentration of 9.5 × 10−9 M. In the pilot-scale study, the prototype system was applied to clean up petroleum-hydrocarbon polluted soils at a diesel-oil spill site via an on-site slurry-phase soil washing process. The total petroleum hydrocarbon (TPH)-contaminated soils were excavated and treated with the NEC water in a slurry-phase reactor. Results show that up to 74.4% of TPH (initial

关键词： Soils

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Thermoelectric Properties of n-type Full-Heusler Fe_(2-2x)Co_(2x) TiSn Prepared by an Ultra-fast synthesis Process

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Journal of Wuhan University of technology(materials Science) 2021年第4期36卷 497-504页

作者： ZHAO Dongyan CHEN Yanning WANG Yubo ZHANG Haifeng FU Zhen WANG Shuaipeng YU Wen DU Jian WANG Wenhe QIU Junhao YAN Yonggao Beijing Engineering Research Center of High-reliability IC with Power Industrial Grade Beijing Smart-Chip Microelectronics Technology Co.Ltd.Beijing 100192China Beijing Chip Identification Technology Co. Ltd.Beijing102200China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China

Full-Heusler alloy Fe_(2)TiSn was predicted to be a potential thermoelectric material with high mechanical properties and ***_(2)TiSn was usually prepared by arc-melting followed by annealing for 2 weeks,which takes a long time and consumes a large amount of *** this paper,Fe_(2)TiSn was prepared by an ultra-fast method,self-propagating high-temperature synthesis (SHS) combined with spark plasma *** bulk materials with uniform element distribution,well controlled composition and relative densities of over 97.5% were *** undoped Fe_(2)TiSn samples show p-type transport *** was heavily doped at the Fe site to prepare n-type Fe_(2-2x)Co_(2x) TiSn *** thermoelectric properties measurements carried out on the Co-doped samples show a highest ZT=0.02 at 300 K,which is about tripe the performance of the pristine Fe_(2)*** study provides a new approach for the rapid and low-cost preparation of full-Heusler thermoelectric materials.

关键词： thermoelectric full-Heusler Fe2TiSn SHS thermoelectric properties

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Enhanced room-temperature Na^(+) ionic conductivity in Na_(4.92)Y_(0.92)Zr_(0.08)Si_(4)O_(12)

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eScience 2023年第6期3卷 935-945页

作者： Aikai Yang Kai Yao Mareen Schaller Enkhtsetseg Dashjav Hang Li Shuo Zhao Qiu Zhang Martin Etter Xingchen Shen Huimin Song Qiongqiong Lu Ruijie Ye Igor Moudrakovski Quanquan Pang Sylvio Indris Xingchao Wang Qianli Ma Frank Tietz Jun Chen Olivier Guillon Forschungszentrum Jülich GmbH Institute of Energy and Climate ResearchMaterials Synthesis and Processing(IEK-1)52425 JülichGermany Institute of Mineral Engineering(GHI) RWTH Aachen UniversityForckenbeckstraße 3352074 AachenGermany Institute for Applied Materials-Energy Storage Systems(IAM-ESS) Karlsruhe Institute of Technology(KIT)76344 Eggenstein-LeopoldshafenGermany Renewable Energy Conversion and Storage Center(RECAST) Haihe Laboratory of Sustainable Chemical TransformationsKey Laboratory of Advanced Energy Materials Chemistry(Ministry of Education)College of ChemistryNankai UniversityTianjin 300071China Deutsches Elektronen-Synchrotron(DESY) Notkestrasse 8522607 HamburgGermany Laboratoire de Cristallographie et Sciences des Materiaux(CRISMAT) CNRSENSICAEN14000 CaenFrance Beijing Key Laboratory of Theory and Technology for Advanced Batteries Materials School of Materials Science and EngineeringPeking UniversityBeijing 100871China Institute of Materials Henan Academy of SciencesHenan Key Laboratory of Advanced Conductor MaterialsZhengzhou 450046China Max Planck Institute for Solid State Research Heisenbergstraße 170569 StuttgartGermany State Key Laboratory of Chemistry and Utilization of Carbon Based Energy Resources Key Laboratory of Advanced Functional MaterialsAutonomous RegionInstitute of Applied ChemistryCollege of ChemistryXinjiang UniversityUrumqiXinjiang 830046China Forschungszentrum Jülich GmbH Helmholtz Institute Münster(IEK-12)52425 JülichGermany Jülich Aachen Research Alliance JARA-Energy52425 JülichGermany

Developing cost-effective and reliable solid-state sodium batteries with superior performance is crucial for stationary energy storage.A key component in facilitating their application is a solid-state electrolyte with high conductivity and ***,we employed aliovalent cation substitution to enhance ionic conductivity while preserving the crystal *** substitution of Y^(3+)with Zr^(4+)in Na_(5)YSi_(4)O_(12) introduced Naþion vacancies,resulting in high bulk and total conductivities of up to 6.5 and 3.3 mS cm^(-1),respectively,at room temperature with the composition Na_(4.92)Y_(0.92)Zr_(0.08)Si_(4)O_(12)(NYZS).NYZS shows exceptional electrochemical stability(up to 10 V ***þ/Na),favorable interfacial compatibility with Na,and an excellent critical current density of 2.4 mA cm^(-2).The enhanced conductivity of Naþions in NYZS was elucidated using solid-state nuclear magnetic resonance techniques and theoretical simulations,revealing two migration routes facilitated by the synergistic effect of increased Naþion vacancies and improved chemical environment due to Zr^(4+)*** extends the list of suitable solid-state electrolytes and enables the facile synthesis of stable,low-cost Naþion silicate electrolytes.

关键词： Solid-state electrolytes Sodium superionic conductors Na_(4.92)Y_(0.92)Zr_(0.08)Si_(4)O_(12) High conductivity Ultra-wide electrochemical window

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One-Step Electrodeposition of Amorphous Mosx - CDS on Ti Mesh as a Monolithic Heterostructured Photocatalyst for Enhanced Photocatalytic H2 Evolution

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SSRN 2022年

作者： Zhang, Jingtao Zeng, Dongni Xu, Changfu Hu, Wenchao Liu, Peng Cao, Shaowen Chen, Ying School of Materials and Energy Guangdong University of Technology Guangzhou510006 China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan430070 China

Exploiting large-size monolithic semiconductor photocatalyst sheet/layer with superior photocatalytic hydrogen production performances through facile and scalab.e methods is an important research direction in promoting the practical application of traditional particulate semiconductor photocatalyst, yet challenging. Here we constructed an amorphous MoSx - CdS monolithic heterostructured photocatalyst sheet (a-MoSx - CdS/Ti) with maximal size of ~100 cm2 through a one-step potentiostatic electrodeposition process of 5 minutes on titanium mesh used as photocatalyst support. Owing to synergic effects of favorable light absorption, abundant active sites for proton reduction, effective photogenerated charge separation and robust structural integrity, the a-MoSx - CdS/Ti not only exhibits an optimized H2 generation rate of 4476 μmol h−1 g−1, but also demonstrates excellent operability during photocatalytic H2 generation and subsequent recycling processes, greatly improving its applicability. This work presents a straightforward and practical route to produce efficient, robust and easily operable photocatalytic H2 production system which expectantly finds promising practical applications in photocatalysis, photoelectrocatalysis and beyond. © 2022, The Authors. All rights reserved.

关键词： Cadmium sulfide

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Cellulose Composite Kvo Films and Self-Healing Loc Gel Electrolyte for Multifunctional Flexible Electrochromic Device

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SSRN 2023年

作者： Sun, Shuokun Xia, Xiaoyan Gao, Mingrui Wei, Wei Cui, Shichuang Zhu, Quanyao School of Materials Science and Engineering Wuhan University of Technology Hubei Wuhan430070 China State Key Laboratory of Advanced Technology For Materials Synthesis and Processing Hubei Wuhan430070 China Department of Physics Changji University Xinjiang Changji831100 China

Electrochromic materials have attracted intensive attention due to friendly relationship to the environment, energy and user experience. Layered vanad-based compounds are considered as one kind of the most promising electrochromic materials. However, they are plagued by the appearance of ion channel collapse, capacity loss, and aqueous electrochromic materials exhibit poor cycling stability. Herein, we report on KV3O8·0.75H2O (KVO) and further complexed it into a network formed by linear methylcellulose, realizes a stand-alone cellulose composite KVO electrochromic film. K doping destroys the preferred orientation of V2O5 (002) crystal plane and expands the interplanar spacing to 6.9 Å. Cellulose significantly increases the viscosity of the sol (6 times) and acts as a "strengthener". Firstly, the electrochromic properties of methylcellulose composite KVO film (KVO/MC) were studied in 1 mol L-1 LiClO4 nonaqueous electrolyte. The film can freely switch between green-yellow and orange-red, and can retain more than 67% of the charge capacity after 2000 cycles. We further introduce flexible electrochromic devices assembled from KVO/MC films. Development of a self-healing LOC-based gel electrolyte composed of Ethene, 1-chloro-1,2,2-trifluoro-, polymer with 1,1- difluoroethene (P(CTFE-VDF)) and Li+ electrolyte, which is highly consistent with the device. It has a high colouring efficiency of 78.8 cm2 C -1 , achieving fast response (≤5.6 s) and long service life (>77% of the charge capacity and 70% of the optical contrast after 10000 cycles). This design shows great application potential in manufacturing large-area (20×30 cm2 ) flexible devices. © 2023, The Authors. All rights reserved.

关键词： Electrochromism

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H2O molecule adsorption on s-triazine-based g-C3N4

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Chinese Journal of Catalysis 2021年第1期42卷 115-122页

作者： Bicheng Zhu Liuyang Zhang Bei Cheng Yan Yu Jiaguo Yu State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070HubeiChina Key Laboratory of Eco-materials Advanced Technology College of Materials Science and EngineeringFuzhou UniversityFuzhou 350116FujianChina School of Materials Science and Engineering Zhengzhou UniversityZhengzhou 450001HenanChina

The interaction between a gas molecule and photocatalyst is vital to trigger photocatalytic *** surface state of photocatalyst affects much in this ***,adsorption of H2O molecules on s-triazine-based g-C3N4 was thoroughly studied by first-principle *** various initial adsorption models with multifarious locations of H2O molecules were built,the optimized models with strong adsorption energy pointed to the same adsorption configuration,in which the H2O molecule hold an upright orientation above the corrugated g-C3N4 *** intermolecular O-H…N hydrogen bond formed via the binding of a polar O-H bond in H2O molecule and a two-coordinated electron-rich nitrogen atom in *** the bridging effect of this intermolecular hydrogen bond,electrons would transfer from g-C3N4 to the H2O molecule,thereby lowering the Fermi level and enlarging work function of ***,regardless of the substitute,i.e.g-C3N4 multilayer,large supercell and nanotube,this adsorption system was highly reproducible,as its geometry structure and electronic property remained *** addition,the effect of nonmetal element doping on adsorption energy was *** work not only disclosed a highly preferential H2O adsorbed g-C3N4 architecture established by intermolecular hydrogen bond,but also contributed to the deep understanding and optimized design in water-splitting process on g-C3N4-based photocatalysts.

关键词： g-C3N4 H2O Density functional theory Hydrogen bond Adsorption energy

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Scalab.e fabrication and active site identification of MOF shell-derived nitrogen-doped carbon hollow frameworks for oxygen reduction

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Journal of materials Science & technology 2021年第7期66卷 186-192页

作者： Jiashen Meng Ziang Liu Xiong Liu Wei Yang Lianzhou Wang Yan Li Yuan-Cheng Cao Xingcai Zhang Liqiang Mai State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan430070China Nanomaterials Centre School of Chemical Engineering and Australian Institute for Bioengineering and NanotechnologyThe University of QueenslandSt LuciaQLD4072Australia Shenzhen Power Supply Col.Ltd. Shenzhen CityChina State Key Laboratory of Advanced Electromagnetic Engineering and Technology School of Electrical and Electronic EngineeringHuazhong University of Science and TechnologyWuhan430074China John A.Paulson School of Engineering and Applied Sciences Harvard UniversityCambridgeMA02138United States

Nitrogen-doped carbon materials as promising oxygen reduction reaction(ORR) electrocatalysts attract great interest in fuel cells and metal-air batteries because of their relatively high activity, high surface area, high conductivity and low cost. To maximize their catalytic efficiency, rational design of efficient electrocatalysts with rich exposed active sites is highly desired. Besides, due to the complexity of nitrogen species, the identification of active nitrogen sites for ORR remains challenging. Herein, we develop a facile and scalab.e template method to construct high-concentration nitrogen-doped carbon hollow frameworks(NC), and reveal the effect of different nitrogen species on theirORRactivity on basis of experimental analysis and theoretical calculations. The formation mechanism is clearly revealed, including low-pressure vapor superassembly of thin zeolitic imidazolate framework(ZIF-8) shell on ZnO templates,in situ carbonization and template removal. The obtained NC-800 displays better ORR activity compared with other NC-700 and NC-900 samples. Our results indicate that the superior ORR activity of NC-800 is mainly attributed to its content balance of three nitrogen species. The graphitic N and pyrrolic N sites are responsible for lowering the working function, while the pyridinic N and pyrrolic N sites as possible active sites are beneficial for increasing the density of states.

关键词： MOF shell Nitrogen-doped carbon Hollow framework Oxygen reduction Active nitrogen sites

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Bimetal-organic framework-derived carbon nanocubes with 3D hierarchical pores as highly efficient oxygen reduction reaction electrocatalysts for microbial fuel cells

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Science China materials 2021年第12期64卷 2926-2937页

作者： Neng Chen Zihan Meng Rui Wang Shichang Cai Weibin Guo Haolin Tang Foshan Xianhu Laboratory of the Advanced Energy Science and Technology Guangdong Laboratory Xianhu Hydrogen ValleyFoshan 528200China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China

Noble metal-free and highly efficient electrocatalytic materials with hierarchically porous structures continue to be studied for the oxygen reduction reaction(ORR) in microbial fuel cells(MFCs). We report bimetal-organic framework(bi-MOF)-derived nanocubic Swiss cheese-like carbons with a novel three-dimensional hierarchically porous structure(3D Co-N-C) prepared by utilizing cetyltrimethylammonium bromide(CTAB) as a structure-directing agent to control the formation of a nanocubic skeleton, and silica spheres as a template to form a mesoporous structure. The elemental composition and chemical morphology of this material can be tuned through the Zn/Co ratio to optimize its ORR catalytic activity. The optimized 3D Co-N-C displays excellent ORR catalytic performance(half-wave potential as high as 0.754 V vs. reversible hydrogen electrode and diffusion-limiting current density of 5.576 mA cm^(-2)) in 0.01 mol L^(-1) phosphate-buffered saline(PBS electrolyte),showing it can compete with the commercial 20 wt% Pt/C catalysts. The catalytic capability and long-term durability of 3D Co-N-C as an air-filled cathode electrocatalyst in an MFC device are tested, showing that the 3D CoNC-MFC can reach a high power density of 1257 mW m^(-2) and provide a competitive voltage during a periodic feeding operation for 192 h;these values are much higher than those of the Pt/C-MFC.

关键词： Co-N-doped carbon structure-oriented approach 3D hierarchically porous nanocubes oxygen reduction reaction microbial fuel cells

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Microstructure and Oxidation Resistance of V Thin Films Deposited by Magnetron Sputtering at Room Temperature

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Journal of Wuhan University of technology(materials Science) 2020年第5期35卷 879-884页

作者： ZHANG Song ZHANG Ziyu LI Jun TU Rong SHEN Qiang WANG Chuanbin LUO Guoqiang ZHANG Lianmeng State Key Laboratory of Advanced Technology for Materials Synthesis and ProcessingWuhan University of TechnologyWuhan 430070China National Key Laboratory for Shock Wave and Detonation Physics Institute of Fluid PhysicsMianyang 621900China

Vanadium films were deposited on Si(100)substrates at room temperature by direct current(DC)magnetron *** microstructure and surface morphology were studied using scanning electron microscopy(SEM)and atomic force microscope(AFM).The oxidation resistance of films in air was studied using X-ray photoelectron spectroscopy(XPS)and transmission electron microscopy(TEM).The results showed that the amorphous vanadium film with a flatter surface had higher oxidation resistance than the crystalline film when exposed to *** rapid formation of the thin oxide layer of amorphous vanadium film could protect the film from sustained oxidation,and the relative reasons were discussed.

关键词： vanadium films magnetron sputtering sputtering power(Ps) microstructure oxidation resistance

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