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Lithiophilic interface guided transient infiltration of molten lithium for stable 3D composite lithium anodes

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Nano Research 2023年第6期16卷 8297-8303页

作者： Lan-Xing Li Yun-Nuo Li fei-fei cao Huan Ye College of Science Huazhong Agricultural UniversityWuhan 430070China

Fabricating three-dimensional(3D)composite lithium anodes via thermal infusion effectively addresses uncontrollable Li deposition and large volume ***,potential risks due to the long wetting time and high melting point remain a critical yet unconsidered ***,we report a stable 3D composite Li anode by infusing molten Li into a 3D scaffold within 3 s at 220℃.The key-enabling technique is the growth of a lithiophilic Mg-Al double oxide(LDO)nanosheet array layer on the *** in-situ formed lithiophilic alloy,combined with the capillary forces from the nanosheet arrays,enabled the transient infiltration of molten *** addition,the formed high ionic-conductivity Li phase can help construct a robust solid electrolyte interphase(SEI),stabilize the Li anode/electrolyte interface,and guide uniform Li *** 3D composite anode exhibited a long cycling life of 1,000 h under a current density of 1 mA·cm^(−2)and over 1,600 h under a current density of 2 mA·cm^(−2)with a high areal capacity of 4 mAh·cm^(−2)in Li/Li symmetric *** 3D composite anodes paired with high areal capacity LiFePO_(4)(LFP)and S cathodes demonstrate its practical application feasibility.

关键词： lithium metal battery composite Li anode interfacial layer thermal infusion long cycling life

Strategies for improving the storage performance of silicon-based anodes in lithium-ion batteries

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Nano Research 2019年第8期12卷 1739-1749页

作者： Wei Tao Ping Wang Ya You Kyusung Park cao-Yu Wang Yong-Ke Li fei-fei cao Sen Xin College of Science Huazhong Agricultural UniversityWuhan 430070China Department of Mechanical Engineering The University of Texas at Austin AustinTX 78712USA

Silicon has attracted much attention as a promising anode material for lithium-ion batteries (LIBs) due to its high theoretical capacity and rich resource abundance. However, the practical battery use of Si is challenged by its low conductivity and drastic volume variation during the Li uptake/release process. Tremendous efforts have been made on shrinking the particle size of Si into nanoscale so that the volume variation could be accommodated. However, the bare nano-Si material would still pulverize upon (de)lithiation. Moreover, it shows an excessive surface area to invite unlimited growth of solid electrolyte interface that hinders the transportation of charge carriers, and an increased interparticle resistance. As a result, the Si nanoparticles gradually lose their electrical contact during the cycling process, which accounts for poor thermodynamic stability and sluggish kinetics of the anode reaction versus Li. To address these problems and improve the Li storage performance of nano-Si anode, proper structural design should be applied on the Si anode. In this perspective, we will briefly review some strategies for improving the electrochemistry versus Li of nano-Si materials and their derivatives, and show opinions on the optimal design of nanostructured Si anode for advanced LIBs.

关键词： silicon anode lithium-ion battery silicon/carbon composites silicon/non-carbon composites silicon oxide

Self-supported hard carbon anode from fungus-treated basswood towards sodium-ion batteries

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Nano Research 2023年第3期16卷 3832-3838页

作者： Ping Wang Yu-Jie Guo Wan-Ping Chen Hui Duan Huan Ye Hu-Rong Yao Ya-Xia Yin fei-fei cao Institute of Advanced Materials Key Lab of Fluorine and Silicon for Energy Materials and Chemistry of Ministry of EducationCollege of Chemistry and Chemical EngineeringJiangxi Normal UniversityNanchang 330022China College of Science Huazhong Agricultural UniversityWuhan 430070China Institute of Chemistry Chinese Academy of SciencesBeijing 100190China Fujian Provincial Engineering Technology Research Center of Solar Energy Conversion and Energy Storage Fuzhou 350117China

Hard carbon derived from biomass is regarded as a promising anode material for sodium-ion batteries(SIBs)because of its low operating potential,high capacity,resource availability,and low ***,scientific and technological challenges still exist to prepare hard carbon with a high initial Coulombic efficiency(ICE),an excellent rate capability,and good cycling *** this work,we report a self-supported hard carbon electrode from fungus-pretreated basswood with an improved graphitization degree and a low *** with the hard carbon derived from basswood,the hard carbon electrode from fungus-pretreated basswood has an improved rate capability of 242.3 mAh·g^(−1)at 200 mA·g^(−1)and cycling stability with 93.9%of its capacity retention after 200 cycles at 40 mA·g^(−1),as well as the increased ICE from 84.3%to 88.2%.Additionally,ex-situ X-ray diffraction indicates that Na+adsorption caused the sloping capacity,whereas Na+intercalation between interlayer spacing corresponded to the low potential plateau *** work provides a new perspective for the preparation of high-performance hard carbon and gains the in-depth understanding of Na storage mechanism.

关键词： sodium-ion battery anode hard carbon fungus-pretreated basswood

Stable Li/Na Metal Anodes for Rechargeable Alkali Metal Batteries with High Specific Energy

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Stable Li/Na Metal Anodes for Rechargeable Alkali Metal Batt...

中国化学会第三届中国能源材料化学研讨会

作者： Huan Ye fei-fei cao Yu-Guo Guo College of Science Huazhong Agricultural University Institute of Chemistry Chinese Academy of Sciences

Rechargeable Li metal batteries or room-temperature Na metal batteries,which combined a Li or Na metal anode and high energy cathodes such as S and O,possess high theoretical specific energies and low cost,and are considered as the most promising batteries towards future stationary grid storage and transportation applications.

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来源： cnki会议评论

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囊状幼虫病病毒的流行及其感染治疗

中国生物制品学杂志 2017年第9期30卷 954-957页

作者：沈克飞曹联飞曹兰任勤谭方明张邑帆重庆市畜牧科学院重庆402460 浙江省农业科学院浙江杭州310021 重庆市石柱县沿溪镇畜牧兽医站重庆409113

目的调查重庆、浙江和云南蜜蜂幼虫囊状幼虫病病毒(sacbrood virus,SBV)的感染率,并观察抗微生物肽(amicrobial peptide)小分子阳离子六肽(short cationic hexapeptides,SP6)对人工感染的中蜂囊状幼虫病的治疗效果。方法采用RT-PCR法检... 详细信息

目的调查重庆、浙江和云南蜜蜂幼虫囊状幼虫病病毒(sacbrood virus,SBV)的感染率,并观察抗微生物肽(amicrobial peptide)小分子阳离子六肽(short cationic hexapeptides,SP6)对人工感染的中蜂囊状幼虫病的治疗效果。方法采用RT-PCR法检测重庆、浙江和云南蜜蜂幼虫SBV的感染率。将SP6溶于糖水,隔天饲喂1次SBV人工感染的发病中华蜜蜂蜂群,连续给药9次,测定蜂群幼虫死亡率,评价其对感染的防治效果。结果重庆和浙江中蜂幼虫SBV感染率分别为85.6%和4.76%,云南西方蜜蜂幼虫SBV感染率为6.67%;重庆和浙江西方蜜蜂幼虫及云南中蜂幼虫未检出SBV。0.1%SP6给药组能极显著地降低SBV感染蜂群的幼虫死亡率,防治效果达到74.48%。结论在重庆、浙江和云南地区均检出SBV,但SBV在不同地区对蜜蜂种群的危害程度不同,在重庆中蜂群广泛流行。SP6对SBV感染中蜂有良好的防治效果,具有药物开发价值。

关键词：囊状幼虫病病毒蜜蜂抗微生物肽小分子阳离子六肽防治效果

Bounded Evaluation:Querying Big Data with Bounded Resources

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International Journal of Automation and computing 2020年第4期17卷 502-526页

作者： Yang cao Wen-fei Fan Teng-fei Yuan University of Edinburgh Edinburg EH89ABUKUniversity of EdinburghEdinburg EH89ABUK Shenzhen Institute of Computing Sciences Shenzhen UniversityShenzhen 518060China Beijing Advanced Innovation Center for Big Data and Brain Computing Beihang UniversityBeijing 100191China

This work aims to reduce queries on big data to computations on small data,and hence make querying big data possible under bounded resources.A query Q is boundedly evaluable when posed on any big dataset D,there exists a fraction DQ of D such that Q(D)=Q(DQ),and the cost of identifying DQ is independent of the size of *** has been shown that with an auxiliary structure known as access schema,many queries in relational algebra(RA)are boundedly evaluable under the set semantics of *** paper extends the theory of bounded evaluation to RAaggr,i.e.,RA extended with aggregation,under the bag semantics.(1)We extend access schema to bag access schema,to help us identify DQ for RAaggr queries Q.(2)While it is undecidable to determine whether an RAaggr query is boundedly evaluable under a bag access schema,we identify special cases that are decidable and practical.(3)In addition,we develop an effective syntax for bounded RAaggr queries,i.e.,a core subclass of boundedly evaluable RAaggr queries without sacrificing their expressive power.(4)Based on the effective syntax,we provide efficient algorithms to check the bounded evaluability of RAaggr queries and to generate query plans for bounded RAaggr queries.(5)As proof of concept,we extend PostgreSQL to support bounded *** experimentally verify that the extended system improves performance by orders of magnitude.

关键词： Bounded evaluation resource-bounded query processing effective syntax access schema boundedness

SHARING AND PLANNING OF DISTRIBUTED EQUIPMENT FOR NETWORKED MANUFACTURING

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Chinese Journal of Mechanical Engineering 2007年第1期20卷 73-76页

作者： cao Le LIU fei School of Mechanical Engineenng Chongqing University Chongqing 400030 China

Efficient utilization of the equipment distributed in different enterprises and optimal allocation of these resources is an important concern for networked manufacturing. The third party based equipment sharing approach is put forward to optimize the utilization of distributed equipment for networked manufacturing; Taking advantage of the shared equipment offered by equipment providers by means of lease agreement, the third party carries out production by establishing networked virtual factory. Operational mechanism of the third party based equipment sharing is discussed, and characteristics of this approach in achieving resource allocation are analyzed. Shared equipment planning is formulated as an optimization problem with the objective of maximizing profits for equipment coordinator, a mathematical model for shared equipment planning is developed. Finally a case study is discussed to show the effectiveness of the planning model.

关键词： Networked manufacturing Equipment sharing Equipment planning

Special issue on recent progress in organic electronics and photonics

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Science China Chemistry 2017年第4期60卷 431-432页

作者： fei Huang Yong cao Institute of Polymer Optoelectronic Materials and Devices State Key Laboratory of Luminescent Materials and Devices South China University of Technology Guangzhou 510641 China

Organic electronic and photonic devices have received tre- mendous attention from both academia and industry be- cause of their great promise for practical use as organic light-emitting diodes （OLEDs）, organic solar cells （OSCs）, organic field-effect transistors （OFETs）, and chemical and biological sensors. During the past decade, remarkable pro- gress has been achieved in this cutting-edge research field, which has opened numerous opportunities for the fabrica- tion of advanced organic electronic devices. For instance, solution-processable OSCs with a power conversion effi- ciency （PCE） exceeding 12% have been achieved, which meets the basic requirements for commercialization. Re- cently, active-matrix OLEDs that can be used in smart phones, televisions, and as flexible displays for portable devices have been commercialized.

关键词：电子学有机发光二极管光子学有机太阳能电池场效应晶体管有机电子器件功率转换效率生物传感器

Impacts of pancreatic exocrine insufficiency on gut microbiota

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Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2024年第4期25卷 271-279页

作者： Yulin GUO Feng cao fei LI Department of General Surgery Xuanwu Hospital of Capital Medical UniversityBeijing 100053China Acute Pancreatitis Clinical Center of Capital Medical University Beijing 100053China

Pancreatic exocrine insufficiency(PEI)can be induced by various kinds of diseases,including chronic pancreatitis,acute pancreatitis,and *** main pathogenetic mechanism of PEI involves the decline of trypsin synthesis,disorder of pancreatic fluid flow,and imbalance of secretion *** studies have shown that PEI could induce gut bacterial overgrowth and dysbiosis,with the abundance of Lactobacillus and Bifidobacterium increasing the most,which could be partially reversed by pancreatic enzyme replacement *** studies have also confirmed the association between PEI and the dysbiosis of gut *** exocrine secretions and changes in duodenal p H as well as bile salt malabsorption brought about by PEI may affect and shape the abundance and composition of gut *** turn,the gut microbiota may impact the pancreatic exocrine acinus through potential bidirectional *** forward,more and higher-quality studies are needed that focus on the mechanism underlying the impact of PEI on the gut microbiota.

关键词： Pancreatic exocrine insufficiency Gut microbiota Gut microbiome Pancreatic enzyme replacement therapy