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Journal of Advanced Ceramics 2024年第7期13卷 1080-1091页

作者： yuyu zhang Xuemeng zhang Hongkang ou Bozhe Wang Jia Sun Qiangang Fu Science and Technology on Thermostructural Composite Materials Laboratory Shaanxi Key Laboratory of Fiber Reinforced Light-Weight CompositesNorthwestern Polytechnical UniversityXi’an 710072China System Design Institute of Hubei Aerospace Technology Academy Wuhan 430040China

To efficiently decrease ablation heat accumulation and improve the ability of zrC-SiC/TaC coatings to protect carbon/carbon(C/C)composites,a thermally conductive nanonetwork with a ceramic@carbon core-shell structure was designed and ***-derived SiC/TaC with a graphene carbon shell was synthesized and introduced into a zrC coating by supersonic atmospheric plasma spraying(SAPS).Graphene shell paths increased the heat transfer capability by lowering the surface temperature to approximately 200℃during oxyacetylene *** heat dissipation of the graphene shell in the zrC-SiC/TaC@C coating reduced the volatilization of low-melting-point phases and delayed the sintering of zrO_(2) ***,the graphene shell in zrC-SiC/TaC@C coating decreased the mass and linear ablation rates by 91.4%and 93.7%compared to zrC-SiC/TaC coating,*** work provided a constructive idea for improving the ablation resistance of the coatings by incorporating carbon nanomaterials as a function of heat dissipation.

关键词： carbon/carbon(C/C)composites carbon nanomaterials core-shell structure polymer-derived ceramic(PDC) ablation resistance

Single-structure 3-axis Lorentz force magnetometer based on an AlN-on-Si MEMS resonator

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Microsystems & Nanoengineering 2024年第3期10卷 75-86页

作者： Cheng Tu Xu-heng ou-yang ying-jie Wu Xiao-sheng zhang School of Integrated Circuit Science and Engineering University of Electronic Science and Technology of ChinaChengdu 611731China

This work presents a single-structure 3-axis Lorentz force magnetometer(LFM)based on an AlN-on-Si MEMS *** operation of the proposed LFM relies on the flexible manipulation of applied excitation currents in different directions and frequencies,enabling the effective actuation of two mechanical vibration modes in a single device for magnetic field measurements in three ***,the excited out-of-plane drum-like mode at 277 kHz is used for measuring the x-and y-axis magnetic fields,while the in-plane square-extensional mode at 5.4 MHz is used for measuring the z-axis magnetic *** different configurations of applied excitation currents ensure good crossinterference immunity among the three *** to conventional capacitive LFMs,the proposed piezoelectric LFM utilizes strong electromechanical coupling from the AlN layer,which allows it to operate at ambient pressure with a high *** understand and analyze the measured results,a novel equivalent circuit model for the proposed LFM is also reported in this work,which serves to separate the effect of Lorentz force from the unwanted capacitive *** demonstrated 3-axis LFM exhibits measured magnetic responsivities of 1.74 ppm/mT,1.83 ppm/mT and 6.75 ppm/mT in the x-,y-and z-axes,respectively,which are comparable to their capacitive counterparts.

关键词： resonator Lorentz structure

Strategies for flame-retardant polymer electrolytes for safe lithiumbased batteries

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Nano Research 2024年第10期17卷 8754-8771页

作者： Xiao Ma yang Lu yu ou Shuaishuai yan Wenhui Hou Pan zhou Kai Liu Department of Chemical Engineering Tsinghua UniversityBeijing 100084China

The advancement of lithium-based batteries has spurred anticipation for enhanced energy density,extended cycle life and reduced capacity ***,these benefits are accompanied by potential risks,such as thermal runaway and explosions due to higher energy ***,liquid organic electrolytes are the predominant choice for lithium batteries,despite their limitations in terms of mechanical strength and vulnerability to *** development of polymer electrolytes,with their high young’s modulus and enhanced safety features,offers a potential solution to the drawbacks of traditional liquid *** these advantages,polymer electrolytes are still susceptible to burning and *** address this issue,researchers have conducted extensive studies to improve their flame-retardant properties from various *** review provides a concise overview of the thermal runaway mechanisms,flame-retardant mechanisms and electrochemical performance of polymer *** also outlines the advancements in flame-retardant polymer electrolytes through the incorporation of various additives and the selection of inherently flame-retardant *** review aims to offer a comprehensive understanding of flame-retardant polymer electrolytes and serve as a guide for future research in this field.

关键词： lithium batteries polymer electrolyte thermal runaway flame-retardant additives energy storage materials

The safety aspect of sodium ion batteries for practical applications

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Journal of Energy Chemistry 2024年第8期95卷 407-427,I0009页

作者： yingshuai Wang Runqing ou Jingjing yang yuhang Xin Preetam Singh Feng Wu yumin Qian Hongcai Gao School of Materials Science&Engineering Beijing Institute of TechnologyBeijing 100081China School of Physics Beijing Institute of TechnologyBeijing 100081China yangtze Delta Region Academy of Beijing Institute of Technology Jiaxing 314019ZhejiangChina Beijing Institute of Technology Chongqing Innovation Center Chongqing 401120China Department of Ceramic Engineering Indian Institute of Technology(Banaras Hindu University)VaranasiUttar Pradesh 221005India

Sodium-ion batteries(SIBs)with advantages of abundant resource and low cost have emerged as promising candidates for the next-generation energy storage ***,safety issues existing in electrolytes,anodes,and cathodes bring about frequent accidents regarding battery fires and explosions and impede the development of high-performance ***,safety analysis and high-safety battery design have become prerequisites for the development of advanced energy storage *** reported reviews that only focus on a specific issue are difficult to provide overall guidance for building high-safety *** overcome the limitation,this review summarizes the recent research progress from the perspective of key components of SIBs for the first time and evaluates the characteristics of various improvement *** orderly analyzing the root causes of safety problems associated with different components in SIBs(including electrolytes,anodes,and cathodes),corresponding improvement strategies for each component were discussed *** addition,some noteworthy points and perspectives including the chain reaction between security issues and the selection of improvement strategies tailored to different needs have also been *** brief,this review is designed to deepen our understanding of the SIBs safety issues and provide guidance and assistance for designing high-safety SIBs.

关键词： Sodium ion batteries Safety Organic electrolytes modification Solid-state electrolyte Anode bulk modification Cathode bulk design

Smart materials for safe lithium-ion batteries against thermal runaway

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Journal of Energy Chemistry 2024年第7期94卷 360-392页

作者： yu ou Pan zhou Wenhui Hou Xiao Ma Xuan Song Shuaishuai yan yang Lu Kai Liu Department of Chemical Engineering Tsinghua UniversityBeijing 100084China

In recent years,the new energy storage system,such as lithium ion batteries(LIBs),has attracted much *** order to meet the demand of industrial progress for longer cycle life,higher energy density and cost efficiency,a quantity of research has been conducted on the commercial application of ***,it is difficult to achieve satisfying safety and cycling performance *** may be thermal runaway(TR),external impact,overcharge and overdischarge in the process of battery abuse,which makes the safety problem of LIBs more *** this review,we summarize recent progress in the smart safety materials design towards the goal of preventing TR of LIBs reversibly from different abuse *** from smart responsive materials and novel structural design,the safety of LIBs can be improved a *** expect to provide a comprehensive reference for the development of smart and safe lithium-based battery materials.

关键词： Lithium ion batteries(LIBs) Thermal runaway(TR) Smart materials Safe batteries Solid electrolyte interface(SEI)

High Fischer ratio oligopeptides in food:sources,functions and application prospects

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Journal of Future Foods 2024年第2期4卷 128-134页

作者： zhen Wang Xinrui zhang Luyang Wang Xingqi ou Jihong Huang State Key Laboratory of Crop Stress Adaptation and Improvement College of AgricultureHenan UniversityKaifeng 475004China Food Laboratory of zhongyuan Luohe 462300China College of Life Science and Technology Henan Institute of Science and TechnologyXinxiang 453003China College of Biological Engineering Henan University of TechnologyZhengzhou 450001China School of Food and Pharmacy Xuchang UniversityXuchang 461000China

High Fischer ratio oligopeptides(HFROs)are a group of oligopeptides containing high levels of branched-chain amino acids(BCAA)and low levels of aromatic amino acids(AAA).HFROs have received a lot of attention as they are believed to have significant physiological activities,including antioxidant,liver damage repair,anti-fatigue,anti-tumor and energy supply to the *** are available from a wide range of sources and both plant and animal proteins can be used to prepare HFROs but the physiological tolerability and rejection of special populations needs to be *** hydrolysis is the most common method for the preparation of HFROs,but optimization of the separation and purification process is still needed in the *** caused by disruptions in the balance of BCAA and AAA in the blood,such as hepatic encephalopathy,can be treated by supplementing HFROs with drugs or *** addition,HFROs are able to reduce fatigue feedback and assist in the treatment of phenylketonuria at the molecular nutrient *** aim of this review is to review recent research on HFROs and provide new perspectives on the high value use of crops and the development of novel functional and special medical purpose foods.

关键词： Fischer ratio Oligopeptides Amino acids5- Hydroxytryptamine Phenylketonuria

Converting intercalation-type cathode in spent lithium-ion batteries into conversion-type cathode

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Nano Research 2024年第5期17卷 4602-4609页

作者： Dingding zhu yong Su Jingzhao Chen Xiangze ou Xuedong zhang Wen Xie yuyan zhou yunna Guo Qiushi Dai Peng Jia Jitong yan Lin Geng Baiyu Guo Liqiang zhang yongfu Tang Qiao Huang Jianyu Huang School of Materials Science and Engineering Xiangtan UniversityXiangtan 411105China Clean Nano Energy Center State Key Laboratory of Metastable Materials Science and TechnologyYanshan UniversityQinhuangdao 066000China

The widespread applications of lithium-ion batteries(LIBs)generate tons of spent ***,recycling LIBs is of paramount importance in protecting the environment and saving the *** commercialized LIBs mostly adopt layered oxides such as LiCoO_(2)(LCO)or LiNi_(x)Co_(y)Mn_(1-x-y)O_(2)(NMC)as the cathode *** the intercalation-type spent oxides into conversion-type cathodes(such as metal fluorides(MFs))offers a valid recycling strategy and provides substantially improved energy densities for ***,two typical Co-based cathodes,LCO and LiNi_(0.6)Co_(0.2)Mn_(0.2)O_(2)(NMC622),in spent LIBs were successfully converted to CoF_(2) and(Ni_(x)Co_(y)Mn_(z))F_(2) cathodes by a reduction and fluorination *** as converted CoF_(2) and(Ni_(x)Co_(y)Mn_(z))F_(2) delivered cell energy densities of 650 and 700 Wh/kg,*** atomic-level electron microscopy revealed that the used LCO and NMC622 were converted to highly phase pure Co metal and Ni_(0.6)Co_(0.2)Mn_(0.2) alloys in the used graphite-assisted reduction roasting,simultaneously producing the important product of Li_(2)CO_(3) using only environment friendly *** study provided a versatile strategy to convert the intercalation-type Co-based cathode in the spent LIBs into conversion-type MFs cathodes,which offers a new avenue to recycle the spent LIBs and substantially increase the energy densities of next generation LIBs.

关键词： spent lithium-ion batteries recycling energy densities conversion-type cathode

Dislocation ordering and texture strengthening of naturally aged Al-Cu-Mg alloy

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Journal of Materials Science & Technology 2022年第23期118卷 1-14页

作者： F.Liu z.y.Liu G.y.He L.N.ou School of Materials Science and Engineering Central South UniversityChangsha 410083China Key Laboratory of Nonferrous Metal Materials Science and Engineering Ministry of EducationCentral South UniversityChangsha 410083China National Key Laboratory of Science and Technology on High-Strength Structural Materials Central South UniversityChangsha 410083China

Stability of grain structure,dislocation ordering and strengthening mechanisms of the naturally aged AlCu-Mg alloy after solution treatment are investigated by using optical microscope(OM),scanning electron microscope(SEM),electron back-scattered diffraction(EBSD),X-ray diffraction(XRD) and transmission electron microscope(TEM).Results show that {100},{100},{110} and {110}slip systems can be activated after solution treatment,which can promote the formation of {110}Goss *** combination effect of T-Al_(20)Cu_(2) Mn_(3) phase and Goss-oriented grains with large Taylor factor makes the solution-treated alloys display excellent stability of grain *** enhanced yield strength of the alloy is ascribed to grain-refine strengthening,dispersed particles strengthening,dislocation strengthening and texture *** coarsening of the second phase is responsible for softening of the alloy after annealing at 400 ℃+solution treatment at 475 ℃.

关键词： Al-Cu-Mg alloy Dislocation ordering Goss texture Grain structure stability Texture strengthening

Phytochemical Composition and Insecticidal Property of Native Plants against the Cowpea Weevil Callosobruchus maculatus Fab. (Coleoptera: Bruchidae) for Natural Preservation of Cowpea Seeds

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Advances in Entomology 2024年第1期12卷 56-66页

作者： Elias Mano Rabièta Simde Koï Wenceslas Kam Nadjatou ouédraogo Désiré Dramane Abdoul Khader Sanou Rasmané Abdou ouédraogo Boubakar ouattara Pierre Alexandre Eric Djifaby Sombié Souleymane Nacro Laboratory of Natural Substances and Technologies of Natural Products and the Environment (LABTECH-PRONE) Institute of Research in Applied Sciences and Technologies (IRSAT) Ouagadougou Burkina Faso Central Horticulture Laboratory of the Regional Center of Excellence in Fruits and Vegetables of Bobo-Dioulasso Institute of Environment and Agricultural Research (INERA) Bobo Dioulasso Burkina Faso Department of Animal Biology and Physiology University Joseph Ki-Zerbo Ouagadougou Burkina Faso National Agricultural Training School of Matourkou (ENAFA) Bobo Dioulasso Burkina Faso Institute of Rural Development (IDR) Nazi Boni University Bobo Dioulasso Burkina Faso

About 80% of cowpea seeds are lost along with 30% of their weight after six months of unprotected storage due to attacks by Callosobruchus maculatus. This study aimed at evaluating the effect of applying bioinsecticides on the biological parameters of C. maculatus to reduce its damage to cowpea stocks. Four treatments including an untreated control and three doses of powdery extracts of C. nigricans, z. zanthoxyloides and H. suaveolens, were compared in a Fischer block with four completely randomized repetitions. One hundred undamaged cowpea seeds were mixed with doses of each extract in Petri dishes and then fed as food substrates to ten pairs of C. maculatus for eight days. The extracts of H. suaveolens, C. nigricans and z. zanthoxyloides all contain active ingredients including polyphenols, flavonoids, anthocyanins and alkaloids, etc. The extract of z. zanthoxyloides was found to be more active on adults (100.00% mortality) followed by C. nigricans (98.75% mortality) and H. suaveolens (97.50% mortality) at 80 mg/g. Fecundity per female decreased significantly in the treated batches of 13.82 eggs for H. suaveolens at 10.12 eggs for C. nigricans at a dose of 80 mg/g. Germination rate of seeds was statistically raised to 100% at 60 and 80 mg/g by C. nigricans powder and lowered to 83.00% at 20 mg/g by z. zanthoxyloides extracts. The application of z. zanthoxyloides extract would be a less expensive alternative for the sustainable management of C. maculatus in cowpea stocks.

关键词： Cassia nigricans Hyptis suaveolens zanthoxylum zanthoxyloides Biological Activities Vigna unguiculata Pest Burkina Faso

由超拍电子伏特加速器产生的超高能伽马射线气泡

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Science Bulletin 2024年第4期69卷 449-457页

作者： LHAASO Collaboration zhen Cao Chuandong Gao Cong Li Ruo-yu Liu Ruizhi yang 不详 Key Laboratory of Particle Astrophyics&Experimental Physics Division&Computing Center Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China University of Chinese Academy of Sciences Beijing 100049China TIANFU Cosmic Ray Research Center ChengduChina Institute of Frontier and Interdisciplinary Science Shandong UniversityQingdao 266237China School of Astronomy and Space Science Nanjing UniversityNanjing 210023China University of Science and Technology of China Hefei 230026China

We report the detection of aγ-ray bubble spanning at least 100deg2 in ultra-high energy(UHE)up to a few PeV in the direction of the star-forming region Cygnus X,implying the presence super PeVatron(s)accelerating protons to at least 10 PeV.A log-parabola form with the photon indexΓ(E)=(2.71±0.02)+(0.11±0.02)×log10(E/10 TeV)is found fitting the gamma-ray energy spectrum of the bubble *** sources,“hot spots”correlated with very massive molecular clouds,and a quasi-spherical amorphousγ-ray emitter with a sharp central brightening are observed in the *** the core of~0.5°,spatially associating with a region containing massive OB association(Cygnus OB2)and a microquasar(Cygnus X-3),as well as previously reported multi-TeV sources,an enhanced concentration of UHEγ-rays is observed with 2 photons at energies above 1 *** general feature of the bubble,the morphology,and the energy spectrum,are reasonably reproduced by the assumption of a particle accelerator in the core,continuously injecting protons into the ambient medium.

关键词： Cosmic rays γ-rays Interstellar medium Star cluster