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Preparation of High Performance Grccn Alumina Ceramic Balls by Roller Production Waste

Journal of Wuhan University of technology(materials Science) 2008年第1期23卷 134-138页

作者：钟莲云吴伯麟 ZHANG Lianmeng ZHANG Guifang State Key Lab of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan 430070 China Key Lab of Nonferrous Materials and New Processing Technology （ Guangxi University Guilin University of Technology ） of Ministry of Education Guilin 541004 China School of Chemistry and Ecological Engineering Guangxi University for Nationalities Nanning 530006 China

To reuse roller waste as a raw material of high performance green ceramic balls, three kinds of white alumina ceramic balls whose wear resistance were 2-3 times of the best high alumina ceramic ball with 90% Al2O3 were prepared, and the Al2O3 content of the prepared balls was 75%. It is found that the effect of calcia and magnesia on the wear resistance of ceramic balls is contrast to the accepted one： the wear rate of the ceramic balls prepared in CaO-Al2O3-SiO2 system is the lowest and the wear rate of the ceramic balls prepared in MgO-Al2O3-SiO2 is the highest. The main crystal phase of the ceramic ball is mullite and corundum. The ceramic ball granular is uniform and fine with 4-5 μm average size. The pore diameter is about 2 μm. The wear way of the ceramic balls is mainly transcrystalline fracture.

关键词： roller production waste alumina ceramic ball wear resistance white transcrystalline fracture

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[email protected] SiO x /C microspheres with semi-graphitic carbon coating on the exterior and interior surfaces for durable lithium storage

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Energy Storage materials 2019年 19卷 299-305页

作者： Zhenhui Liu Yunlong Zhao Ruhan He Wen Luo Jiashen Meng Qiang Yu Dongyuan Zhao Liang Zhou Liqiang Mai State Key Laboratory of Advanced Technology for Materials Synthesis and † Processing Wuhan University of Technology Wuhan 430070 PR China Department of Chemistry and Chemical Biology Harvard University Cambridge MA 02138 USA Department of Chemistry and Shanghai Key Lab of Molecular Catalysis and Innovative Materials and Laboratory of Advanced Materials Fudan University Shanghai 200433 PR China

Silicon oxides (SiO x ) represent an attractive high-capacity lithium-ion battery (LIB) anode material. However, the huge volume variation of SiO x causes rapid capacity fading and unstable solid electrolyte interface, seriously limiting the practical application. To address the inherent defects of SiO x , herein, we designed a [email protected] structured SiO x /C anode with semi-graphitic carbon coatings on the exterior and interior surfaces (SiO x /C-CVD) through sol-gel process, selective etching, and chemical vapor deposition. The unique composite nanostructure endows the SiO x /C-CVD high electrical conductivity and excellent structural stability. The as-prepared SiO x /C-CVD composite demonstrates a high reversible capacity (1165 mA h g -1 at 100 mA g -1 ) as well as outstanding durability (972 mA h g -1 after 500 cycles at 500 mA g -1 ). Furthermore, the full cells of SiO x /C-CVD//LiCoO 2 are also assembled, delivering a high energy density of ~428 W h kg -1 with a stable cycling behavior. The carbon coated [email protected] design might be applied to optimize the lithium storage performances of other high-capacity anode materials suffering from poor electrical conductivity and large volume variations.

关键词： Silicon oxides [email protected] structure Semi-graphitic carbon Lithium storage anode

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Microstructuring Conductive Electrospun Mats for Enhanced Electro‑active Biofilm Growth and High‑Performance Bioelectrocatalysis

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advanced Fiber materials 2023年第5期5卷 1699-1711页

作者： Min Li Hao Lu Jiadong Hu Xuemei Xiang Yanling Zheng Wenhu Gao Wei Sun Wei Wang Zhisong Lu Yan Qiao Institute for Clean Energy and Advanced Materials School of Materials and EnergySouthwest UniversityChongqing 400715People’s Republic of China Sino‑Singapore Joint Laboratory of Materials and Technologies for Proactive Health Monitoring School of Materials and EnergySouthwest UniversityChongqing 400715People’s Republic of China Experimental Center for Virtual Simulation of Sports and Health Southwest UniversityChongqing 400715People’s Republic of China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University TechnologyWuhan 430070People’s Republic of China Hubei Longzhong Lab Xiangyang 441000People’s Republic of China Key Laboratory of Laser Technology and Optoelectronic Functional Materials of Hainan Province College of Chemistry and Chemical EngineeringHainan Normal UniversityHaikou 571158People’s Republic of China Singapore Institute of Manufacturing Technology Singapore 138669Singapore

Electrospun materials have attracted considerable attention in microbial fuel cells(MFC)owing to their porous structures,which facilitate the growth of electro-active biofilms(EABs).However,the impact of fiber diameter-controlled porous architectures on EAB growth and MFC performance has not been extensively ***,a highly conductive polypyrrole-modified electrospun polyacrylonitrile(PAN)mat was prepared as an electrode material for Shewanella putrefaciens CN32-based *** dominant pore size of the corresponding mat increases from 1 to around 20μm as the fiber diameter increases from 720 to 3770 *** variation affects the adhesion and growth behaviors of electrochemically active bacteria on the mat-based *** electrodes with poresranging from 2 to 10μm allow bacterial penetration into the interior,leading to significant biofilm loading and effective ***,the tight lamination of the electrospun fibers restricts bacterial growth in the deep interior *** developed a friction-induced triboelectric expanding approach to rendering the mats with layered structures to overcome this *** inter-layer spaces of the expanded conductive mat can facilitate bacterial loading from both sides of each layer and serve as channels to accelerate the catalysis of organic ***,the expanded conductive mat with appropriate pore sizes delivers superior bioelectrocatalytic performance in MFCs and dye *** on the findings,a mechanism for the porous structure-controlled EAB formation and bioelectrocatalytic performance was *** work may provide helpful guidance and insights for designing microfiber-based electrodes for microbial fuel cells.

关键词： Electrospun mat Porous structure Bioelectrocatalysis Microbial fuel cells Polypyrrole

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Experimental technique for quasi-isentropic compression via ramp-wave generator

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Wuhan Ligong Daxue Xuebao/Journal of Wuhan University of technology 2008年第3期30卷 1-4页

作者： Wang, Chuan-Bin Shen, Qiang Qiu, Hui-Guang Zhang, Lian-Meng State Key Lab. of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan 430070 China

A kind of Li2O-Al2O3-SiO2 system glass-ceramics, which had a low coefficient of thermal expansion, was prepared by melting method and used as the ramp-wave generator material. On one-stage light-gas gun, the experimental technique for quasi-isentropic compression via the ramp-wave generator was explored. By impacting the ramp-wave generator, quasi-isentropic compression waves with an extended wave's front were produced. The quasi-isentropic loadings to LY12-A1 samples were further realized via the ramp-wave generator. The results showed that the more the thickness of the ramp-wave generator, the longer the front of the generated waves and the lower the rate of the compression. The present research offered a feasible loading means for the quasi-isentropic compression under low pressures.

关键词： Glass-ceramics Quasi-isentropic compression Ramp-wave generator

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Influence factors analysis for fabrication of silicon nitride whisker by thermal decomposition of Si(NH)2

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Wuhan Ligong Daxue Xuebao/Journal of Wuhan University of technology 2007年第2期29卷 8-11页

作者： Bi, Yu-Hui Chen, Fei Li, Jun Zhang, Dong-Ming Zhang, Lian-Meng State Key Lab. of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan 430070 China

In the present study, Si2N4 whisker was prepared by thermal decomposition of Si(NH)2, the experimental principles and process were described in detail. Influence factors such as temperature, residual carbon(C), a small quantity of oxygen and crucible material that could influence the growth of whisker was analyzed and discussed. The influence degree of each factor and mechanism were explained as well. High quality and modified Si3N4 whisker could be prepared by controlling the influence factors during the experimental process. As a result, it was significant to fabricate batch production of high performance Si3N4 whisker by utilizing this method.

关键词： α-Sialon Influence factors Si(NH)2 Si3N4 whisker

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Fine-structured TiO2 ceramic patterns on the ceramic surface fabricated by replication

Fine-structured TiO2 ceramic patterns on the ceramic surface...

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International Symposium on Multifunctional Ceramic materials Based on Nanotechnology, ISMCN 2010

作者： Kim, H.D. Nakayama, T. Hong, B.J. Imaki, K. Yoshimura, T. Suzuki, T. Suematsu, H. Lee, S.W. Fu, Z. Niihara, K. Extreme Energy-Density Research Institute Nagaoka University of Technology 1603-1 Kamitomioka Nagaoka 940-2188 Japan Department of Physics and Electronics Graduate School of Engineering Osaka Prefecture University 1-1 Gakuencho Nakaku Sakai 599-8531 Japan Department of Environmental Engineering Sun Moon University Chungnam 336-708 Korea Republic of State Key Lab. of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan 430070 China

The ability to fabricate high precision micro- to nanoscale structure in a wide variety of materials is of crucial importance for the advancement of microtechnology, nanotechnology and nanoscience. Also, the ability to create micrometer and sub-micrometer architecture for functional ceramics is a prerequisite of exploring the rich field of ceramic nanotechnology. In this work we fabricated three-dimensional oxide ceramic materials with fine-structure over multiple length scales by combining replication patterning technique, polyvinyl alcohol (PVA), oxide ceramic material (TiO2) nano-sized particles. Our study is based on the idea that PVA can be easily detached from a mold by peeling. We confirmed that micron and sub-micron-sized fine-structured oxide ceramic patterns containing nano-sized pores could be fabricated using this procedure. The results presented demonstrate the compositional and structural diversities that are possible with a facile approach and simple method.

关键词： Ceramic materials

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Research on the curing reaction heat resistance of ATPU/epoxy resin system

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Wuhan Ligong Daxue Xuebao/Journal of Wuhan University of technology 2007年第1期29卷 37-39页

作者： Chen, Wen-Yi Guan, Jian-Guo Center for Material Research and Analysis Wuhan University of Technology Wuhan 430070 China State Key Lab of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan 430070 China

Thermogravimetry (TG-DTA) was used to study the heat resistance characteristics and curing heat decomposition kinetics of ATPU/epoxy resin system. Results showed that the decomposition temperature of the cured ATPU-2/E-44 was higher than that of ATPU-1.5/E-44. The calculation results of decomposition reaction showed that the cured system of ATPU-2/E-44 had better heat resistance, the reaction decomposition active energy of ATPU-2/E-44 system was higher than that of ATPU-1.5/E-44.

关键词： Active energy Amine-terminated polyurethane (ATPU) Epoxy resin Heat decomposition kinetics Heat resistance

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Recent progress in perovskite solar cells:from device to commercialization

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Science China Chemistry 2022年第12期65卷 2369-2416页

作者： Xinhui Luo Xuesong Lin Feng Gao Yang Zhao Xiaodong Li Liqing Zhan Zexiong Qiu Jin Wang Cong Chen Lei Meng Xiaofeng Gao Yu Zhang Zijian Huang Rundong Fan Huifen Liu Yanrun Chen Xiaoxue Ren Jiahong Tang Chun-Hao Chen Dong Yang Yongguang Tu Xiao Liu Dongxue Liu Qing Zhao Jingbi You Junfeng Fang Yongzhen Wu Hongwei Han Xiaodan Zhang Dewei Zhao Fuzhi Huang Huanping Zhou Yongbo Yuan Qi Chen Zhaokui Wang Shengzhong(Frank)Liu Rui Zhu Jotaro Nakazaki Yongfang Li Liyuan Han State Key Laboratory of Metal Matrix Composites School of Material Science and EngineeringShanghai Jiao Tong UniversityShanghai 200240China State Key Lab for Mesoscopic Physics and Frontiers Science Center for Nano-optoelectronics School of PhysicsPeking UniversityBeijing 100871China Key Laboratory of Semiconductor Materials Science Institute of SemiconductorsChinese Academy of SciencesBeijing 100083China School of Physics and Electronic Science Engineering Research Center of Nanophotonics&Advanced InstrumentMinistry of EducationEast China Normal UniversityShanghai 200241China Key Laboratory for Advanced Materials and Institute of Fine Chemicals School of Chemistry and Molecular EngineeringEast China University of Science and TechnologyShanghai 200237China Wuhan National Laboratory for Optoelectronics Huazhong University of Science and TechnologyWuhan 430074China Institute of Photoelectronic Thin Film Devices and Technology Renewable Energy Conversion and Storage CenterSolar Energy Research CenterNankai UniversityTianjin 300350China College of Materials Science and Engineering&Engineering Research Center of Alternative Energy Materials&Devices Ministry of EducationSichuan UniversityChengdu 610065China Beijing National Laboratory for Molecular Sciences CAS Key Laboratory of Organic SolidsInstitute of ChemistryChinese Academy of SciencesBeijing 100190China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China Beijing Key Laboratory for Theory and Technology of Advanced Battery Materials Key Laboratory of Polymer Chemistry and Physics of Ministry of EducationSchool of Materials Science and EngineeringPeking UniversityBeijing 100871China School of Physics and Electronics Hunan Key Laboratory of Nanophotonics and DevicesCentral South UniversityChangsha 410083China Experimental Center for Advanced Materials School of Materials Science and EngineeringBeijing Institute of TechnologyBeijing 100081China Jia

Perovskite solar cells(PSCs) are undergoing rapid development and the power conversion efficiency reaches 25.7% which attracts increasing attention on their commercialization *** this review,we summarized the recent progress of PSCs based on device structures,perovskite-based tandem cells,large-area modules,stability,applications and ***,the challenges and perspectives are discussed,aiming at providing a thrust for the commercialization of PSCs in the near future.

关键词： perovskite solar cells device engineering stability application

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High-Pressure And High-Temperature synthesis of Black Phosphorus-Graphite Anode material for Lithium-Ion Batteries

SSRN

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SSRN 2023年

作者： Cheng, Zhikang Tu, Bingtian Wu, Ye Huang, Haijun School of Science Wuhan University of Technology Hubei Wuhan430070 China Hubei Longzhong Laboratory Wuhan University of Technology Xiangyang Demonstration Zone Hubei Xiangyang441000 China State Key Lab of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Hubei Wuhan430070 China

Phosphorus-based materials with a high theoretical specific capacity and a fast charge-discharge rate are considered as promising anode materials for high energy density lithium-ion batteries (LIBs). Red phosphorus (RP) and black phosphorus (BP) are two main allotropes to be used as anode materials. However, huge volume expansion during charge-discharge processes hinders the application of RP and BP in LIBs. Composites of phosphorus and carbon-based materials have been extensively fabricated to withstand volume expansion of phosphorus and improve cycle performance. Here, composites of BP and graphite (BP-G) with three P-G mass ratios (8 : 2, 7 : 3, and 6 : 4) have been synthesized by a facile and scalable high-pressure and high-temperature (HPHT) method using RP and graphite composites (RP-G) prepared by ball milling as precursors. Their microstructure and bonding configurations have been analyzed by various characterization techniques. Among three RP-G composites, 7RP-3G exhibits the most excellent cycling stability, a high reversible capacity of 1331 mAh/g after 200 cycles at a current density of 0.78 A/g. However, RP-G composites show poor stability at high current densities. Among three BP-G composites, 6BP-4G shows the best cycle stability at high current densities, a reversible capacity of 634.6 mAh/g after 500 cycles at a current density of 2.6 A/g. Although, the reversible specific capacities of BP-G composites after long cycles are lower than those of RP-G, BP-G composites show more stable cycle performance than RP-G, especially at high current densities. The present work illustrates a direct and facile method to synthesize BP-G composites, and sheds light to explore new synthetic route of BP-based composites. © 2023, The Authors. All rights reserved.

关键词： Lithium-ion batteries

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Modeling and simulation of PEM fuel cell based on electrochemical model

Wuhan Ligong Daxue Xuebao (Jiaotong Kexue Yu Gongcheng Ban)/...

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Wuhan Ligong Daxue Xuebao (Jiaotong Kexue Yu Gongcheng Ban)/Journal of Wuhan University of technology (Transportation Science and Engineering) 2008年第5期32卷 933-936页

作者： Xu, Lamei Xiao, Jinsheng Pan, Mu Yuan, Runzhang State Key Lab of Advanced Technology for Material Synthesis and Processing Wuhan University of Technology Wuhan 430070 China School of Automation Wuhan University of Technology Wuhan 430070 China School of Automobile Wuhan University of Technology Wuhan 430070 China

Based on the electrochemical model, a simulation model has been developed with Matlab/Simulink. Steady-state analysis has been developed to evaluate how the temperature affect the voltage and output power of the fuel cell. Dynamic analysis focus on the dynamic response of the output voltage, the output power, the consumed power, the efficiency and the internal resistance of a single PEMFC when the current of a PEMFC increase or decrease transiently. This simulation model also adapted to the simulation of PEMFC stack. The study is helpful for the optimization and control of PEMFC.

关键词： Electrochemical model Modeling Proton exchange membrane fuel cell (PEMFC) Simulation

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