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A Review of Al Alloy Anodes for Al-Air Batteries in Neutral and Alkaline Aqueous Electrolytes

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Acta Metallurgica Sinica(English Letters) 2021年第3期34卷 309-320页

作者： Pengfei Wu Shengan Wu Dan Sun Yougen Tang Haiyan Wang hunan provincial key laboratory of Chemical Power Sources College of Chemistry and Chemical EngineeringCentral South UniversityChangsha 410083China

Aluminum-air(Al-air) batteries are promising candidates for energy storage applications because of their high theoretical energy density and low ***,their developments have been severely hindered by multiple obstacles,among which the activation and self-corrosion inhibition of Al anode have been considered to be significant *** neutral electrolytes,the main problem is the activation of Al anode,while the self-corrosion of Al anode becomes dominant in alkaline *** efforts have been devoted to overcoming the dilemma associated with the Al *** review firstly underscores the underlying mechanisms of passivation and self-corrosion of Al anode in different ***,specific attentions are paid to Al alloy anode,including the role of various elements and standard processing ***,general conclusions,current limitations,and future perspectives on Al alloy anode are presented.

关键词： Al-air battery Al alloy Electrolyte Corrosion inhibition Activation

N-Acetyl-D-glucosamine improves the intestinal development and nutrient absorption of weaned piglets via regulating the activity of intestinal stem cells

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Animal Nutrition 2022年第1期8卷 10-17页

作者： Zhaobin Wang Jie Hu Xinyuan Yang Lanmei Yin Min Wang Yuebang Yin Jianzhong Li Huansheng Yang Yulong Yin hunan provincial key laboratory of Animal Intestinal Function and Regulation Hunan International Joint Laboratory of Animal Intestinal Ecology and HealthLaboratory of Animal Nutrition and Human HealthCollege of Life SciencesHunan Normal UniversityChangshaHunan410081China key laboratory of Agro-ecological Processes in Subtropical Region Institute of Subtropical AgricultureChinese Academy of SciencesHunan Provincial Engineering Research Center for Healthy Livestock and Poultry ProductionScientific Observing and Experimental Station of Animal Nutrition and Feed Science in South-CentralMinistry of AgricultureHunan Provincial Key Laboratory of Animal Nutritional Physiology and Metabolic ProcessChangshaHunan410125China

Early weaning in piglets can cause a series of negative *** causes serious losses to the livestock industry.N-Acetyl-D-glucosamine(D-GlcNAc)plays an important role in regulating the homeostasis of the *** study aimed to investigate the effects of D-GlcNAc on the growth performance and intestinal function of weaned ***-four weaned piglets([Yorkshire×Landrace]Duroc,6.58±0.15 kg,n=8)at 21 d old were fed 3 diets supplemented with 0(control),1 and 3 g/kg *** intestinal organoid model was used to verify the regulatory mechanism of D-GlcNAc on intestinal epithelial *** the whole,supplementation of D-GlcNAc in the piglet diet has no significant effect on the growth performance and diarrhoea of weaned piglets(P>0.05).The apparent digestibility of nutrients and mRNA abundance of nutrient transporters in the 1 g/kg D-GlcNAc group were increased significantly(P<0.05).D-GlcNAc did not affect villus height(VH)and crypt depth(CD)but resulted in a numerically shorter VH and shallower CD,which lead to an increase in ileal VH:CD ratio(P<0.05).Cell shedding rates in the ileum villi increased(P<0.05).The relative length and weight of the small intestine of weaned piglets increased(P<0.05).In vitro studies found that the budding rates of organoids treated with 0.1 mmol/L D-GlcNAc increased on the d 3 and 5(P<0.05).The average budding numbers per budding organoid treated with 0.1 and 10 mmol/L D-GlcNAc increased on d 3(P<0.05).D-GlcNAc upregulated leucine rich repeat containing G protein-coupled receptor 5(Lgr5^(+))and Chromogranin A mRNA abundance in organoids(P<0.05).Mucin 2(Muc2)expression increased when treated with 1 and 10 mmol/L D-GlcNAc(P<0.05).In conclusion,dietary D-GlcNAc cannot improve the growth performance of weaned ***,it can promote the growth and development of the intestinal tract and improve the digestion and absorption capacity of the intestine,which is achieved by affecting the activity of intestinal stem cell

关键词： N-Acetyl-D-glucosamine Weaned piglet Growth performance Intestinal organoid Intestinal stem cell

The developmental changes in intestinal epithelial cell proliferation,differentiation,and shedding in weaning piglets

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Animal Nutrition 2022年第2期9卷 214-222页

作者： Min Wang Lixia Wang Xian Tan Lei Wang Xia Xiong Yancan Wang Qiye Wang Huansheng Yang Yulong Yin hunan International Joint laboratory of Animal Intestinal Ecology and Health Laboratory of Animal Nutrition and Human HealthCollege of Life SciencesHunan Normal UniversityChangsha 410081HunanChina hunan provincial key laboratory of Animal Nutritional Physiology and Metabolic Process Hunan Provincial Engineering Research Center for Healthy Livestock and Poultry ProductionKey Laboratory of Agro-ecological Processes in Subtropical RegionInstitute of Subtropical AgricultureChinese Academy of SciencesChangsha 410125HunanChina

Intestinal epithelial homeostasis plays an important role in intestinal morphology and ***,the developmental changes in intestinal epithelial cell turnover in piglets during early weaning are unknown so ***,the aim of this work was to detect changes in piglet gut development from weaning to post-weaning d ***,40 piglets were used in the present study,and 8 piglets were randomly selected for sampling at d 0,1,3,7 and 14 post-weaning,*** results showed that weaning stress significantly affected small intestinal morphological architecture,and this impact was the worst on d 3,and then returned to normal on d ***,the number of the marker of proliferation Ki-67(Ki67)positive cells was decreased on d 1 and 3,and then recovered on d 14(P<0.001).Also,weaning strikingly increased jejunal epithelial cell shedding on d 1 to 7 compared on d 0(P<0.05).Moreover,weaning remarkably affected the number of small intestinal enterocytes,goblets and endocrine cells(P<0.05),and there were also significant differences in genes expression related to proliferation and differentiation(P<0.05).Additionally,the mechanistic target of rapamycin(mTOR)phosphorylation level was higher on d 3(P<0.05).However,the Wingless/Int1(WNT)/b-catenin pathway was not influenced by post-weaning *** together,weaning induced noteworthy changes in intestinal epithelial cell proliferation,differentiation and shedding,and the mTOR signaling pathway was involved in this *** findings provide a cellular mechanism for intestinal developmental changes during weaning *** may provide nutritionists with better insight into designing efficient in-feed alternatives for preventing the unfavorable gut development in weaning piglets.

关键词： Intestinal epithelial cell Proliferation Differentiation Shedding Weaning piglet

Enhanced 1-5 μm near-and mid-infrared emission in Ho/Ybcodoped TeO-ZnF oxyfluorotellurite glasses

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Journal of Rare Earths 2020年第10期38卷 1044-1052,I0001页

作者： Yu Wang Changfu Xu Zhen Zhang Cheng Zheng Jintao Pei Lizhong Sun hunan provincial key laboratory of Thin Film Materials and Devices School of Materials Science and EngineeringXiangtan UniversityXiangtan 411105China

Intense 1-5 μm infrared emission from near-to mid-infrared was obtained from Ho3+/Yb3+codoped TeO2-ZnF2 oxyfluorotellurite glasses which were prepared by melt-quenching method under the 980 nm LD excitation,and the emission intensity can be enhanced with the increase of ZnF2 ***-Ofelt analysis was used to evaluate the radiative transition parameters of the excited levels according to the absorption *** stimulated emission cross section of 5 I6→5 I8(1.2 μm),5 I7→5 I8(2.0μm),5 I6→5 I7(2.85 μm) and 5 I5→5 I6(4.0 μm) transitions were calculated to reach 0.639 × 10-20,0.760 ×10-20,0.985×10 20 and 0.484 × 10-20 cm2,*** energy transfer coefficients(CDA) are enhanced with the increase of ZnF2 content and phonon contribution ratios of phonon assisted energy transfer process between Ho3+ and Yb3+were figured *** results demonstrate that these TeO2-ZnF2 glasses,which possess good thermal stability and transparency,low phonon energy(about 600 cm-1),excellent near-and mid-infrared emission in the range of 1-5 μm wavelength,would be promising material for infrared optical fibers and infrared lasers.

关键词： TeO2-ZnF2 glass Ho3+/Yb3+codoped Energy transfer 1-5μm near-and mid-infrared Rare earths

Enhanced triboelectric output of PDMS-based composite film with bi-material filling and surface patterning

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Science China(Technological Sciences) 2023年第10期66卷 2930-2941页

作者： LIU Sheng LIAO SiHua LIU Dan ZHAO Rong ZHOU Teng YAN WenYuan WEI KeXiang ZOU HongXiang ZHAO LinChuan hunan provincial key laboratory of Vehicle Power and Transmission System Hunan Institute of EngineeringXiangtan 411104China State key laboratory of Mechanical System and Vibration School of Mechanical EngineeringShanghai Jiao Tong UniversityShanghai 200240China

Triboelectric nanogenerators(TENGs)are highly promising energy-harvesting devices that exhibit considerable potential for use in self-powered wearable ***/microfillers and surface microstructure modification have been proposed to improve the triboelectric performance of *** this work,performance-enhanced flexible polydimethylsiloxane(PDMS)was developed through bi-material(reduced graphene oxide/fluorinated ethylene propylene,rGO/FEP)modification and filtrationmembrane-patterned surface *** rGO/FEP with high charge-inducing and-trapping capabilities can be used as the dielectric-enhanced filler for improving *** micro-dents of 5–50μm are created on the modified PDMS surface with an increased contact area of *** with the pure PDMS,the modified PDMS film-based TENG could deliver a substantial enhancement in power density(0.87 mW cm^(-2))by 28 ***,the versatility of this device is demonstrated in human activity monitoring and capacitor *** work provided a simple,high-tunability,and scalable approach for improving the output performance of TENGs for biomechanical energy-harvesting devices that can be integrated into self-powering wearable electronics.

关键词： triboelectric nanogenerator energy harvesting wearable sensor dielectric enhancement surface modification

Fabrication of homogeneously dispersed graphene/Al composites by solution mixing and powder metallurgy

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International Journal of Minerals,Metallurgy and Materials 2018年第1期25卷 102-109页

作者： Xiang Zeng Jie Teng Jin-gang Yu Ao-shuang Tan Ding-fa Fu Hui Zhang School of Materials Science and Engineering Hunan University College of Chemistry and Chemical Engineering Hunan Provincial Key Laboratory of Efficient and Clean Utilization of Manganese ResourcesCentral South University

Graphene-reinforced aluminum （AI） matrix composites were successfully prepared via solution mixing and powder metallurgy in this study. The mechanical properties of the composites were studied using microhardness and tensile tests. Compared to the pure Al alloy, the graphene/Al composites showed increased strength and hardness. A tensile strength of 255 MPa was achieved for the graphene/Al com- posite with only 0.3wt% graphene, which has a 25% increase over the tensile strength of the pure Al matrix. Raman spectroscopy, Fourier transform infrared spectroscopy, scanning electron microscopy, and transmission electron microscopy were used to investigate the morphol- ogies, chemical compositions, and microstructures of the graphene and the graphene/A1 composites. On the basis of fractographic evidence, a relevant fracture mechanism is proposed.

关键词： graphene metal matrix composites solution mixing powder metallurgy mechanical properties

Designing Zinc Deposition Substrate with Fully Preferred Orientation to Elude the Interfacial Inhomogeneous Dendrite Growth

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Research 2023年第1期2022卷 31-39页

作者： Chunlin Xie Zefang Yang Qi Zhang Huimin Ji Yihu Li Tingqing Wu Wenbin Li Pengfei Wu Haiyan Wang hunan provincial key laboratory of Chemical Power Sources College of Chemistry and Chemical EngineeringCentral South UniversityChangsha 410083China

The development of zinc-ion batteries with high energy density remains a great challenge due to the uncontrollable dendrite growth on their zinc metal *** anodes plated on the substrate have attracted increasing attention to alleviate these dendrite ***,we first point out that both the random crystal orientation and the low metal affinity of the substrate are important factors of zinc dendrite ***,the(1 O 1)fully preferred tin interface layer with high zinc affinity was fabricated by chemical tin plating on(1 O o)oriented *** tin decorated copper substrate can realize high reversible zinc plating/stripping behavior,and full cell using this zinc plated substrate can be operated for more than 1000 cycles with high capacity retention(85.3%)and low electrochemical *** proposed strategy can be also applied to lithium metal batteries,which demonstrates that the substrate orientation regulation and metal affinity design are the promising approaches to achieve dendrite-free metal anode and overcome the challenges of highly reactive metal anodes.

关键词： copper Zinc stripping

Ultimate dielectric scaling of 2D transistors via van der Waals metal integration

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Nano Research 2022年第2期15卷 1603-1608页

作者： Weiqi Dang Bei Zhao Chang Liu Xiangdong Yang Lingan Kong Zheyi Lu Bo Li Jia Li Hongmei Zhang Wanying Li Shun Shi Ziyue Qin Lei Liao Xidong Duan Yuan Liu hunan key laboratory of Two-Dimensional Materials and State key laboratory for Chemo/Biosensing and Chemometrics College oj Chemistry and Chemical EngineeringHunan UniversityChangsha 410082China hunan key laboratory of Two-Dimensional Materials Department of Applied PhysicsSchool of Physics and ElectronicsHunan UniversityChangsha 410082China laboratory for Micro/Nano Optoelectronic Devices of Ministry of Education&hunan provincial key laboratory of Low-Dimensional Structural Physics and Devices School of Physics and ElectronicsHunan UniversityChangsha 410082China

The two-dimensional transition metal dichalcogenides(TMDs)have attracted intense interest as an atomically thin semiconductor channel for the continued transistor ***,with a dangling bond free surface,it has been a key challenge to reliably integrate high-quality gate dielectrics on *** particular,the atomic layer deposition of dielectrics on TMDs typically features highly non-uniform nucleation and produces a highly rough or porous dielectric film with rich pinholes that are prone to further damage during the gate integration *** we report a van der Waals(vdW)integration route towards highly reliable gate metal integration on porous *** physical lamination process employed by the vdW integration avoids the direct deposition of metal electrodes into porous dielectrics to ensure reliable gate integration and produce low gate leakage *** electrical measurements demonstrate the vdW integrated MoS_(2) top gate devices exhibit substantially reduced gate leakage current that is about 3-5 orders of magnitude smaller than that with deposited metal ***,we show the vdW integration process can be used to create high performance top-gated MoS_(2) transistors with ultrathin Al_(2)O_(3) dielectrics down to 1 nm,representing the ultimate dielectric scaling for TMDs *** study demonstrates that vdW integration can enable highly reliable gate integration on relatively low quality dielectrics on TMDs,and opens an interesting pathway to high-performance top-gate transistors using dangling bond free two-dimensional(2D)semiconductors.

关键词： van der Waals(vdW)integration dielectric scaling transfer gate MoS_(2) metal oxide semiconductor field effect transistor(MOSFET)

Responsive MXene nanovehicles deliver CRISPR/Cas12a for boolean logic-controlled gene editing

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Science China Chemistry 2022年第11期65卷 2318-2326页

作者： Song Wang Zhenhua Zhang Rui Tang Fang He Yan Huang Zhou Nie Chunyang Lei Department State key laboratory of Chemo/Biosensing and Chemometrics College of Chemistry and Chemical EngineeringHunan Provincial Key Laboratory of Biomacromolecular Chemical BiologyHunan UniversityChangsha 410082China Hubei Yangtze Memory Laboratories Wuhan 430205China

Programmable and precise regulation of genetic information is crucial in bioengineering and biomedicine;however, it remains challenging to implement this objective. Here we deployed DNA-functionalized MXenes as a smart delivery system for spatiotemporally controllable genome editing. The MXene nanovehicles rationally integrated photothermal effect with nucleic acid strand displacement reaction, thereby allowing for the binary logic gate-controlled release of Cas ribonucleoprotein complexes in response to different input patterns of NIR light and nucleic acids. This system was highly programmable and could be harnessed to construct 2-input(AND, OR, and N-IMPLY) and 3-input(AND/OR and N-IMPLY/OR) logic gates for precise gene editing in mammalian cells. Moreover, an AND logic gate-controlled delivery system achieved selective induction of tumor cell death in a xenograft mice model using tissue-penetrating NIR light and cancer-relevant microRNA as the inputting ***, the MXene nanovehicles adopted both the external and endogenous signals as the stimuli to precisely control gene editing under logic computation, presenting a helpful strategy for therapeutic genome editing.

关键词： Mxenes boolean logic gates CRSIPR/Cas12a gene editing nanovehicles

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