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Research and development of Chinese LCA database and LCA software

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Rare Metals 2006年第z2期25卷 101-104页

作者： gong xianzheng {2. wang zhihong ZUO Tieyong College of materials science and {2. Beijing University of Technology Beijing 100022 China College of Materials Science and Engineering Beijing University of Technology Beijing 100022 China College of Materials Science and Engineering Beijing University of Technology Beijing 100022 China College of Materials Science and Engineering Beijing University of Technology Beijing 100022 China

This paper detailed introduces the related work for building Chinese National Database, Sinocenter, of materials life cycle assessment (MLCA) and developing the environmental burden dataset of materials. The MLCA database was built in 2.04, and the basic framework mainly includes LCA methodology, materials environmental dataset about energy consumption, resource input and environmental emissions. Nowadays, the database contains about fifty-thousand records of the main materials industries, such as cement, iron and steel, nonferrous metal, etc., and also includes the primary LCI data of fossil fuels and electricity grid in China. At the same time, the LCA method localization work is going on, for instance, calculated the resource characterization factors of 42.kinds of metal and 58 sorts of nonmetal, and also obtained some heavy metal impact factors in water. Based on the database, the iron and steel dataset has been developed with the data quality analysis, and some environmental burden data could be queried in our website, ***, in the future. Lastly, according to the framework of the ISO14040 series standards, the antitype of Chinese LCA evaluation system was developed to support materials and products LCA evaluation in China.

关键词： database dataset environmental burden data quality LCI

Regulating Oxygen Vacancy Defects in Heterogeneous NiO-CeO_(2.−δ Hollow Multi-shelled Structure for Boosting Oxygen Evolution Reaction

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Chemical Research in Chinese Universities 2024年第3期40卷 475-483页

作者： wang Huan gong Guannan {2. Guohua QI Jian yu Ranbo wang Dan Hebei Key Laboratory of Flexible Functionals materials School of Materials Science and EngineeringHebei University of Science and TechnologyShijiazhuang 050000P.R.China Department of Physical Chemistry School of Metallurgical and Ecological EngineeringUniversity of Science&Technology BejingBeijing 100083P.R.China State Key Laboratory of Biochemical engineering Institute of Process EngineeringChinese Academy of SciencesBeijing 100190P.R.China

CeO_(2. with excellent oxygen storage-exchange capacity and NiO with excellent surface activity were used to construct a heterogeneous NiO-CeO_(2.−δhollow multi-shelled structure(HoMS)by spray *** turned out that as the proportion of CeO_(2. increases,the overpotential and Tafel slope of NiO-CeO_(2.−δHoMSs first decreased and then *** is mainly because the construction of the NiO-CeO_(2.−δHoMSs not only increases the specific surface area,but also introduces oxygen vacancy defects,thus improving the interface charge transfer capability of the materials and further improving the oxygen evolution reaction(OER)***,the increase of the calcination temperature will induce the decay of the OER performance of NiO-CeO_(2.−δHoMSs,which is mainly due to the decrease of the specific surface area,the reduction of oxygen vacancy defects,and the weakening of interface charge transfer ***,a series of heterogeneous composite HoMSs,such as Ni/Co,Mo/Ni,Al/Ni and Fe/Ni oxides was successfully constructed by spray drying,which enriched the diversity of HoMSs.

关键词： Heterogeneous composite structure Hollow multishelled structure Oxygen vacancy defect Oxygen evolution reaction

A novel multi-threshold coupling InAlN/GaN double-channel HEMT for improving transconductance flatness

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science China(Information sciences) 2024年第1期67卷 314-315页

作者： Sirui AN Minhan MI Pengfei wang Sijia liu Qing ZHU Meng ZHANG {2. CHEN Jielong liu Siyin GUO Can {2. Xiaohua MA yue HAO school of Microelectronics Xidian University school of Advanced materials and Nano{2. Xidian University Hubei Jiufengshan Laboratory

GaN-based HEMTs have significant advantages, making them a prime choice for high-frequency, high-power switching [1]. However, the inherent poor linearity of GaN HEMT has yet to be solved, which can be reflected by the nonlinearity of the transconductance (Gm) profile [2.. This makes it hard to achieve high data transmission efficiency and less signal distortion in the wireless communication system [3].

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Impact of Co^(2.)substitution on structure and magnetic properties of M-type strontium ferrite with different Fe/Sr ratios

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Chinese Physics B 2024年第10期33卷 427-433页

作者： Yang sun Ruoshui liu Huayang {2. Baogen Shen school of Rare Earths University of Science and Technology of ChinaHefei 230026China Ganjiang Innovation Academy Chinese Academy of SciencesGanzhou 341119China Ningbo Institute of materials technology&{2. Chinese Academy of SciencesNingbo 315201China beijing National Laboratory for Condensed Matter Physics Institute of PhysicsChinese Academy of SciencesBeijing 100190China

Ion substitution has significantly improved the performance of ferrite magnets,and cobalt remains a key area of *** on the mechanism of Co^(2.)in strontium ferrite,especially SrFe_(2.-x)Co_(x)O_(19-d)(n=6.1-5.4;x=0.05-0.2.)synthesized using the ceramic method,showed that Co^(2.)preferentially enters the lattice as the Fe/Sr ratio *** results in a decrease in the lattice constants a and c due to oxygen vacancies and iron ion *** impact of Co substitution on morphology is minor compared to the effect of the Fe/Sr *** the Fe/Sr ratio decreases and the Co content increases,the saturation magnetization *** magnetic anisotropy field exhibits a nonlinear change,generally increasing with higher Fe/Sr ratios and Co *** changes in the performance of permanent magnets are attributed to the absence of Fe^(3+)ions at the 12.+2. and 2. sites and the substitution of Co^(2.)at the 2. *** suggests that by adjusting the Fe/Sr ratio and appropriate Co substitution,the magnetic anisotropy field of M-type strontium ferrite can be effectively optimized.

关键词： hexaferrite Co substitution Raman spectra magnetic properties

Comparison of thermal shock resistance capabilities of the rotary swaged pure tungsten,potassium-doped tungsten,and W-La2.3 alloys

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Tungsten 2024年第4期6卷 759-766页

作者： Tao Yang Hao wang Fan Feng Xiang liu Xue-{2. gong You-{2.n Lian Jian-Bao wang school of Nuclear science and {2. University of South China Southwestern Institute of Physics

Tungsten-based materials are one of the most important candidates for the plasma facing materials（PFMs） of future fusion reactors,and it is necessary to study the properties of tungsten-based materials under the service conditions of fusion devices to ensure the long-term steady-state operation of future fusion *** this paper,different tungsten-based materials made by the same rotary swaging process are selected to simulate the transient thermal loads on the PFMs of a fusion reactor using an electron beam,and thermal load experiments are carried out by changing the power density of a loading pulse and the pulse *** is found that different tungsten-based materials made by the same process have large differences in thermal shock resistance,and the doped tungsten materials（W-K and W-La2.3） are significantly better than the pure tungsten materials with the increase in thermal shock power density and the number of cycles,especially the W-K materials,which have excellent performance.

关键词： Electron beam Rotary swaging Thermal shock Tungsten materials

Phase engineering of MXene Derivatives Via Molecular Design for High-Rate Sodium-Ion Batteries

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Energy & Environmental materials 2024年第05期7卷 126-134页

作者： Hui Zhang Xingwu Zhai Xin Cao Zhihao liu Xinfeng Tang zhihong Hu Hang {2. Zhandong {2. Yang Xu Wei He Wei Zheng Min Zhou Zheng Ming sun Hefei National Laboratory for Physical sciences at the Microscale School of Chemistry and Materials Science University of Science and Technology of China school of materials {2. and engineering Southeast University National Synchrotron Radiation Laboratory University of Science and Technology of China Department of Chemistry University College London school of Chemistry and Chemical engineering Southeast University

Since 2.19, research into MXene derivatives has seen a dramatic rise; further progress requires a rational design for specific functionality. Herein, through a molecular design by selecting suitable functional groups in the MXene coating, we have implemented the dual N doping of the derivatives,nitrogen-doped TiO2.nitrogen-doped carbon nanosheets （N-TiO2.NC）, to strike a balance between the active anatase TiO2.t low temperatures, and carbon activation at high temperatures. The NH3reduction environment generated at 400℃as evidenced by the in situ pyrolysis SVUV-PIMS process is crucial for concurrent phase engineering. With both electrical conductivity and surface Na+availability, the N-TiO2.NC achieves higher interface capacitive-like sodium storage with long-term stability. More than100 mAh g-1is achieved at 2.A g-1after 5000 cycles. The proposed design may be extended to other MXenes and solidify the growing family of MXene derivatives for energy storage.

关键词： high-rate sodium-ion batteries molecular design MXene derivative phase engineering

Femtosecond laser-induced periodic surface structures on hard and brittle materials

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science China(Technological sciences) 2024年第1期67卷 19-36页

作者： ZHAO GuoXu wang gong LI {2.nFei wang Lei LIAN {2.Dong {2. {2. ZHAO Hui wang {2.Lei LU ZhiWei Center for Advanced Laser technology Hebei University of TechnologyTianjin 300401China Hebei Key Laboratory of Advanced Laser technology and Equipment Tianjin 300401China State Key Laboratory of Integrated Optoelectronics College of Electronic Science and EngineeringJilin UniversityChangchun 130012China school of Information and Electrical engineering Hebei University of EngineeringHandan 056038China

Hard and brittle materials have high hardness,excellent optical stability,chemical stability,and high thermal ***,they have huge application potential in various fields,such as optical components,substrate materials,and quantum information,especially under harsh conditions,such as high temperatures and high *** laser direct writing {2. has greatly promoted the development of femtosecond laser-induced periodic surface structure(Fs-LIPSS or LIPSS by a femtosecond laser)applications of hard and brittle materials due to its high precision,controllability,and three-dimensional processing *** far,LIPSSs have been widely used in material surface treatment,optoelectronic devices,and ***,a consensus has not been reached regarding the formation mechanism of LIPSSs on hard and brittle *** this paper,three widely accepted LIPSS formation mechanisms are introduced,and the characteristics and applications of LIPSSs on diamonds,silicon,silicon carbide,and fused silica surfaces in recent years are *** addition,the application prospects and challenges of LIPSSs on hard and brittle materials by a femtosecond laser are discussed.

关键词： laser-induced periodic surface structures hard and brittle materials femtosecond laser

engineering Strategies for Suppressing the Shuttle Effect in Lithium–Sulfur Batteries

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Nano-Micro Letters 2024年第1期16卷 187-221页

作者： Jiayi Li Li Gao Fengying Pan Cheng gong Limeng sun Hong Gao Jinqiang Zhang {2.fei Zhao Guoxiu wang Hao liu Joint International Laboratory On Environmental and Energy Frontier materials School of Environmental and Chemical EngineeringShanghai UniversityShanghaiPeople’s Republic of China Centre for Clean Energy technology University of Technology SydneyBroadwaySydneyNSW 2007Australia

Lithium–sulfur(Li–S)batteries are supposed to be one of the most potential next-generation batteries owing to their high theoretical capacity and low ***,the shuttle effect of firm multi-step two-electron reaction between sulfur and lithium in liquid electrolyte makes the capacity much smaller than the theoretical *** methods were proposed for inhibiting the shuttle effect of polysulfide,improving corresponding redox kinetics and enhancing the integral performance of Li–S ***,we will comprehensively and systematically summarize the strategies for inhibiting the shuttle effect from all components of Li–S ***,the electrochemical principles/mechanism and origin of the shuttle effect are described in ***,the efficient strategies,including boosting the sulfur conversion rate of sulfur,confining sulfur or lithium polysulfides(LPS)within cathode host,confining LPS in the shield layer,and preventing LPS from contacting the anode,will be discussed to suppress the shuttle ***,recent advances in inhibition of shuttle effect in cathode,electrolyte,separator,and anode with the aforementioned strategies have been summarized to direct the further design of efficient materials for Li–S ***,we present prospects for inhibition of the LPS shuttle and potential development directions in Li–S batteries.

关键词： Shuttle effect Designed strategies Li-S battery Lithium polysulfides

B and Fe co-doped Co_(2.P hollow nanocubes for nitrate electroreduction to ammonia

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Chinese Chemical Letters 2024年第2期35卷 278-282页

作者： Jing Miao Qingling Hong Liping Liang Guomin Li zhihong liu Shibin Yin {2. Chen school of materials {2. and engineering Taiyuan University of Science and TechnologyTaiyuan 030024China school of materials {2. and engineering Shaanxi Normal UniversityXi'an 710062China school of Chemistry and Chemical engineering Shaanxi Normal UniversityXi'an 710062China Guangxi Key Laboratory of Electrochemical Energy materials School of Chemistry and Chemical EngineeringGuangxi UniversityNanning 530004China

Nitrate(NO_(3)^(−))electroreduction reaction(NO_(3)^(−)RR)provides an attractive and sustainable route for NO_(3)^(−)pollution mitigation or energy-saved ammonia(NH3)*** this work,high-quality B and Fe co-doped Co_(2. P hollow nanocubes(B/Fe-Co_(2. P HNCs)are successfully synthesized though simultaneous boronation-phosphorization treatment,which reveal outstanding selectivity,activity,stability for the NO_(3)^(−)to NH_(3) conversion in neutral electrolyte because of big surface area,fast mass transport,superhydrophilic surface,and optimized electronic structure.B/Fe-Co_(2. P HNCs can achieve the high NH3 yield rate(2..67 mg h^(−1) mg_(cat)^(−1))as well as Faradaic efficiency(97.54%)for NO_(3)^(−)RR,greatly outperforming most of non-precious metal based NO_(3)^(−)RR electrocatalysts.

关键词： Nitrate electroreduction reaction Ammonia synthesis Transition metal phosphides Hollow nanocubes