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Electrochemical performance of a porous graphitic carbon-based supercapacitor in three different electrolytes

Carbon 2018年 134卷 537-537页

作者： Ling Ye Zheng-hong Huang Wan-ci Shen Rui-tao Lu Fei-yu Kang Quan-hong Yang State Key Laboratory of New Ceramics and Fine Processing Tsinghua University Beijing 100084 China Engineering Laboratory for Functionalized Carbon Materials Graduate School at Shenzhen Tsinghua University Shenzhen 518055 China Key Laboratory of Advanced Materials of Ministry of Education of China School of Materials Science and Engineering Tsinghua University Beijing 100084 China School of Chemical Engineering and Technology Tianjin University Tianjin 300072 China

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Hydrogen Production: Light-Driven Sustainable Hydrogen Production Utilizing TiO2Nanostructures: A Review (Small Methods 1/2019)

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Small Methods 2019年第1期3卷

作者： Jingsheng Cai Jiali Shen Xinnan Zhang Yun Hau Ng Jianying Huang Wenxi Guo Changjian Lin Yuekun Lai College of Chemical Engineering Fuzhou University Fuzhou 350116 P. R. China Soochow Institute for Energy and Materials InnovationS (SIEMIS) Key Laboratory of Advanced Carbon Materials and Wearable Energy Technologies of Jiangsu Province Soochow University Suzhou 215006 P. R. China National Engineering Laboratory for Modern Silk College of Textile and Clothing Engineering Soochow University Suzhou 215123 P. R. China Particles and Catalysis Research Group School of Chemical Engineering The University of New South Wales Sydney NSW 2052 Australia Research Institute for Biomimetics and Soft Matter Fujian Provincial Key Lab for Soft Functional Materials Research Department of Physics College of Physical Science and Technology Xiamen University Xiamen 361005 P. R. China State Key Laboratory of Physical Chemistry of Solid Surfaces Xiamen University Xiamen 361005 P. R. China

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Effect of Al and Si additions on the synthesis of spark plasma sintered Zr2Al4C5 ceramic 9th

Effect of Al and Si additions on the synthesis of spark plas...

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9th China International Conference on High-Performance Ceramics, CICC 2015

作者： Guo, Qilong Pei, Junjun Gan, Jizhong Li, Junguo Zhang, Lianmeng Key Laboratory of New Building Materials and Building Energy Efficiency of Gansu Province School of Civil Engineering Northwest University for Nationalities Lanzhou730124 China State Key Lab. of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan430070 China

ISBN: (纸本)9783035710656

The Zr2Al4C5 ceramic was successfully fabricated by the spark plasma sintering at 1800°C for 10 min under uniaxial 20 MPa pressure in vacuum using a mixed raw materials of Zr, Al, Si and graphite powders. The X-ray diffraction analysis results showed that the unexpected Zr2Al3C5 phase rather than target compound Zr2Al4C5 formed in the sintered samples. An initial Zr: Al: C molar ratio of 2:4.2:4.8 for raw powders, and even 55 mol.% excess Al, did not lead to a phase transformation from Zr2Al3C5 to Zr2Al4C5. When 4 wt.% Si was induced in the starting powders, the major phase became Zr2Al4C5 and no obvious Zr2Al3C5 was detected in the sintered samples with an initial Zr: Al: C molar ratio of 2: 6.2: 4.8 (55 mol.% excess Al). The introduction of Si could suppress and even remove additional ZrC, and Si atoms would exclusively occupy the site of Al to make Zr2Al4C5 become a stable solid solution. The scanning electron microscopy observation showed that the as-synthesized Zr2Al4C5 grains had elongated, rod-like and/or plate-like shapes. The mechanical properties of the sintered Zr2Al4C5 ceramic were also investigated, and it showed a hardness of 11.06±0.34 GPa and a fracture toughness of 4.6 ± 0.4 MPa m1/2. © 2016 Trans Tech Publications, Switzerland.

关键词： Scanning electron microscopy

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Publisher Correction: Operando monitoring the lithium spatial distribution of lithium metal anodes

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Nature communications 2018年第1期9卷 2902页

作者： Shasha Lv Tomas Verhallen Alexandros Vasileiadis Frans Ooms Yaolin Xu Zhaolong Li Zhengcao Li Marnix Wagemaker Department of Radiation Science and Technology Delft University of Technology Mekelweg 15 Delft 2629 JB The Netherlands. The State Key Laboratory of New Ceramics and Fine Processing School of Materials Science and Engineering Tsinghua University Beijing 100084 China. Key Laboratory of Advanced Materials (MOE) School of Materials Science and Engineering Tsinghua University Beijing 100084 China. Department of Radiation Science and Technology Delft University of Technology Mekelweg 15 Delft 2629 JB The Netherlands. m.wagemaker@tudelft.nl.

The original HTML version of this Article omitted to list Zhengcao Li as a corresponding author. Correspondingly, the original PDF version of this Article incorrectly stated that 'Correspondence and requests for materials should be addressed to M.W. (email: ***@***)', instead of the correct 'Correspondence and requests for materials should be addressed to Z.L. (email: zcli@***) or to M.W. (email: ***@***)'. This has been corrected in both the PDF and HTML versions of the Article.

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High-temperature diffusion behavior of ZrC in C matrix and its promotion on graphitization

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Transactions of Nonferrous Metals Society of China 2016年第8期26卷 2257-2262页

作者： Zhong-wei ZHANG Qiang ZHEN Feng ZHENG Fei LU Ce-wen NAN Rong LI Jun-shan WANG State Key Laboratory of New Ceramics & Fine Processing School of Materials Science and EngineeringTsinghua University Beijing 100084 China Science and Technology on Advanced Functional Composites Laboratory Aerospace Research Institute of Materials and Processing Technology Beijing 100076 China Research Center of Nano Science and Technology Advanced Material Composite and Dispersion Technology Engineering Research Center of Ministry of Education of China Shanghai University Shanghai 200444 China

C/C composite material is widely used in aerospace field and others, however, it is easy to be oxidized at high *** order to improve the oxidation resistance, ZrC is introduced as an oxidation inhibitor used in matrix modification of C/C composite material. Flat plate samples of ZrC/C composite materials were prepared by hot-pressing sintering. The degree of graphitization increases with rising sintering temperature, and layer structure of carbon matrix is observed clearly in the sample treated at 2273 K. Diffusion behavior of Zr in C matrix at high temperature is studied, which can be generally expressed as D=3.382×10?11 exp[2.029×105/(RT)]. The diffusion of Zr in C matrix leads to the over-saturation of C in the micro area and the oversaturated C precipitates as graphite. This continuous process promotes the transformation of carbon to graphite.

关键词： ZrC carbon material diffusion graphitization

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Preparation of Nano-sized Zirconium Carbide Powders through a Novel Active Dilution Self-propagating High Temperature Synthesis Method

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Journal of Wuhan University of technology(materials Science) 2015年第4期30卷 729-734页

作者：达奥运龙飞 WANG Jilin XING Weihong WANG Yang ZHANG Fan 王为民 FU Zhengyi State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Key Lab of New Processing Technology for Nonferrous Metals & Materials Ministry of Education China Guilin University of Technology

High quality nano-sized zirconium carbide （ZrC） powders were successfully fabricated via a developed chemical active dilution self-propagating high-temperature synthesis （SHS） method assisted by ball milling pretreatment process using traditional cheap zirconium dioxide powder （ZrO2）, magnesium powder （Mg） and sucrose （C12H22Oll） as raw materials. FSEM, TEM, HRTEM, SAED, XRD, FTIR and Raman, ICP- AES, laser particle size analyzer, oxygen and nitrogen analyzer, carbon/sulfur determinator and TG-DSC were employed for the characterization of the morphology, structure, chemical composition and thermal stability of the as-synthesized ZrC samples. The as-synthesized samples demonstrated high purity, low oxygen content and evenly distributed ZrC nano-powders with an average particle size of 50nm. In addition, the effects of endothermic rate and the possible chemical reaction mechanism were also discussed.

关键词： zirconium carbide ZrC self-propagating high-temperature synthesis active dilution nano-powders ball milling

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Possible structural origin of superconductivity in Sr-doped Bi2Se3

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Physical Review materials 2018年第1期2卷 014201-014201页

作者： Zhuojun Li Meng Wang Dejiong Zhang Nan Feng Wenxiang Jiang Chaoqun Han Weijiong Chen Mao Ye Chunlei Gao Jinfeng Jia Jixue Li Shan Qiao Dong Qian Ben Xu He Tian Bo Gao CAS Center for Excellence in Superconducting Electronics (CENSE) Shanghai 200050 China State Key Laboratory of Functional Materials for Informatics Shanghai Institute of Microsystem and Information Technology Chinese Academy of Sciences 865 Changning Road Shanghai 200050 China University of Chinese Academy of Sciences Beijing 100049 China Center of Electron Microscopy and State Key Laboratory of Silicon Materials School of Materials Science and Engineering Zhejiang University Hangzhou 310027 China State Key Laboratory of New Ceramics and Fine Processing Department of Materials Science and Engineering Tsinghua University Beijing 100084 People's Republic of China Key Laboratory of Artificial Structures and Quantum Control (Ministry of Education) School of Physics and Astronomy Shanghai Jiao Tong University Shanghai 200240 China State Key Laboratory of Surface Physics and Department of Physics Fudan University Shanghai 200433 China Collaborative Innovation Center of Advanced Microstructures Nanjing 210093 China

Doping bismuth selenide (Bi2Se3) with elements such as copper and strontium (Sr) can induce superconductivity, making the doped materials interesting candidates to explore potential topological superconducting behaviors. It was thought that the superconductivity of doped Bi2Se3 was induced by dopant atoms intercalated in van der Waals gaps. However, several experiments have shown that the intercalation of dopant atoms may not necessarily make doped Bi2Se3 superconducting. Thus, the structural origin of superconductivity in doped Bi2Se3 remains an open question. Herein, we combined material synthesis and characterization, high-resolution transmission electron microscopy, and first-principles calculations to study the doping structure of Sr-doped Bi2Se3. We found that the emergence of superconductivity is strongly related with n-type dopant atoms. Atomic-level energy-dispersive x-ray mapping revealed various n-type Sr dopants that occupy intercalated and interstitial positions. First-principles calculations showed that the formation energy of a specific interstitial Sr doping position depends strongly on the Sr doping level. This site changes from a metastable position at low Sr doping level to a stable position at high Sr doping level. The calculation results explain why quenching is necessary to obtain superconducting samples when the Sr doping level is low and also why slow furnace cooling can yield superconducting samples when the Sr doping level is high. Our findings suggest that Sr atoms doped at interstitial locations, instead of those intercalated in van der Waals gaps, are most likely to be responsible for the emergence of superconductivity in Sr-doped Bi2Se3.

关键词： Dopants Impurities in superconductors

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Pressure-temperature phase diagram of vanadium dioxide

arXiv

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arXiv 2017年

作者： Chen, Yabin Zhang, Shuai Ke, Feng Ko, Changhyun Lee, Sangwook Liu, Kai Chen, Bin Ager, Joel W. Jeanloz, Raymond Eyert, Volker Wu, Junqiao Department of Materials Science and Engineering University of California BerkeleyCA94720 United States Department of Earth and Planetary Science University of California BerkeleyCA94720 United States Center for High Pressure Science and Technology Advanced Research Shanghai201203 China State Key Laboratory of New Ceramics and Fine Processing School of Materials Science and Engineering Tsinghua University Beijing100084 China Materials Sciences Division Lawrence Berkeley National Laboratory BerkeleyCA94720 United States Materials Design SARL Montrouge92120 France

The complexity of strongly correlated electron physics in vanadium dioxide is exemplified as its rich phase diagrams of all kinds, which in turn shed light on the mechanisms behind its various phase transitions. In this work, we map out the hydrostatic pressure - temperature phase diagram of vanadium dioxide nanobeams by independently varying pressure and temperature with a diamond anvil cell. In addition to the well-known insulating M1 (monoclinic) and metallic R (tetragonal) phases, the diagram identifies the existence at high pressures of the insulating M1' (monoclinic, more conductive than M1) phase, and two metallic phases of X (monoclinic) and O (orthorhombic, at high temperature only). Systematic optical and electrical measurements combined with density functional calculations allow us to delineate their phase boundaries as well as reveal some basic features of the transitions. Copyright © 2017, The Authors. All rights reserved.

关键词： Hydrostatic pressure

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Biodegradable Batteries: A Fully Biodegradable Battery for Self-Powered Transient Implants (Small 28/2018)

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Small 2018年第28期14卷

作者： Xueying Huang Dan Wang Zhangyi Yuan Wensheng Xie Yixin Wu Rongfeng Li Yu Zhao Deng Luo Liang Cen Binbin Chen Hui Wu Hangxun Xu Xing Sheng Milin Zhang Lingyun Zhao Lan Yin School of Materials Science and Engineering The Key Laboratory of Advanced Materials of Ministry of Education State Key Laboratory of New Ceramics and Fine Processing Tsinghua University Beijing 100084 P. R. China Department of Electronic Engineering Tsinghua University Beijing 100084 P. R. China Department of Materials Science and Engineering Northwestern University Evanston IL 60208 USA Hefei National Laboratory for Physical Sciences at the Microscale Department of Polymer Science and Engineering University of Science and Technology of China Hefei Anhui 230026 P. R. China

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Graphene Foams: A Bubble‐Derived Strategy to Prepare Multiple Graphene‐Based Porous materials (Adv. Funct. Mater. 23/2018)

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advanced Functional materials 2018年第23期28卷

作者： Rujing Zhang Ruirui Hu Xinming Li Zhen Zhen Zhenhua Xu Na Li Limin He Hongwei Zhu Aviation Key Laboratory of Science and Technology on Advanced Corrosion and Protection for Aviation Material Department 5 P.O. Box 81‐5 AECC Beijing Institute of Aeronautical Materials Beijing 100095 China State Key Lab of New Ceramics and Fine Processing School of Materials Science and Engineering and Center for Nano and Micro Mechanics Tsinghua University Beijing 100084 China International Center for Materials Nanoarchitectonics (WPI‐MANA) National Institute for Materials Science (NIMS) 1‐1 Namiki Tsukuba Ibaraki 305‐0044 Japan

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