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Nano Research 2024年第4期17卷 2574-2591页

作者： Guoyin Zhu Qingzhu Wu Xianghua Zhang Yuwen Bao Xuan Zhang Zhuoyao Shi Yizhou Zhang lianbo ma Institute of Advanced materials and Flexible Electronics(IAMFE) School of Chemistry and Materials ScienceNanjing University of Information Science&TechnologyNanjing 210044China School of materials Science and Engineering Anhui University of TechnologyMaanshan 243002China School of Mechanical Engineering Jiangsu University of TechnologyChangzhou 213001China

Lithium-sulfur(Li-S)batteries,known for their high energy density,are attracting extensive research interest as a promising next-generation energy storage technology.However,their widespread use has been hampered by certain issues,including the dissolution and migration of polysulfides,along with sluggish redox kinetics.Metal sulfides present a promising solution to these obstacles regarding their high electrical conductivity,strong chemical adsorption with polysulfides,and remarkable electrocatalytic capabilities for polysulfide conversion.In this review,the recent progress on the utilization of metal sulfide for suppressing polysulfide shuttling in Li-S batteries is systematically summarized,with a special focus on sulfur hosts and functional separators.The critical roles of metal sulfides in realizing high-performing Li-S batteries have been comprehensively discussed by correlating the materials’structure and electrochemical performances.Moreover,the remaining issues/challenges and future perspectives are highlighted.By offering a detailed understanding of the crucial roles of metal sulfides,this review dedicates to contributing valuable knowledge for the pursuit of high-efficiency Li-S batteries based on metal sulfides.

关键词： lithium-sulfur batteries metal sulfides polysulfide shuttling sulfur hosts separator coating layers

Realizing high initial Coulombic efficiency in manganese-based layered oxide cathodes for sodium-ion batteries via P2/O'3 biphasic structure optimization

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Rare Metals 2024年第5期43卷 2093-2102页

作者： Bo Peng Zi-Hao Zhou Ping Xuan Jie Xu Lian-Bo ma School of materials Science and Engineering Anhui University of Technology Anhui Product Quality Supervision&Inspection Research Institute

Abstract Mn-based layered oxides are among the most promising cathode materials for sodium-ion batteries owing to the advantages of abundance,environmenta friendliness,low cost and high specific capacity.P2 and O'3 are two representative structures of Mn-based layered oxides.However,the P2 structure containing insufficien Na generally exhibits low initial charge capacity,while O'3structure with sufficient Na delivers high initial charge capacity but poor cycle stability.This study prepared a multitude of NaxMnO2（x=0.7,0.8,0.9） cathode materials with varying P2/O'3 ratios and further investigated their electrochemical performances.The optimized Na0.8MnO2comprising 69.9 wt%O'3 and 30.1 wt% P2 phase,exhibited relatively balanced specific capacity,Coulombic efficiency and cycle stability.Specifically,it achieved a high specific capacity of 128.9 mah·g-1with an initia Coulombic efficiency of 98.2%in half-cell configuration The Na0.8MnO2// hard carbon full cell also achieved a high specific capacity of 126.7 mah·g-1with an initia Coulombic efficiency of 98.9%.Moreover,the capacity fading mechanism was revealed by combining in-situ and ex-situ X-ray diffraction.The findings of this study provide theoretical guidance for further modification design of Mnbased layered cathodes.

关键词： Sodium-ion batteries Cathode materials Mn-based layered oxides P2/O′3 composites

Promoting polysulfide conversions via cobalt single-atom catalyst for fast and durable lithium-sulfur batteries

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Nano Research 2023年第7期16卷 9335-9343页

作者： Ziwei Wang Yuwen Cheng Shanying Wang Jie Xu Bo Peng Dan Luo lianbo ma Key Laboratory of Green Fabrication and Surface Technology of Advanced Metal materials&School of materials Science and Engineering Anhui University of TechnologyMaanshan 243002China School of Information and Optoelectronic Science and Engineering South China Normal UniversityGuangzhou 510006China Department of Mechanical and Aerospace Engineering The Hong Kong University of Science and Technology(HKUST)Clear Water BayHong Kong 999077China

Although promising strategies have been developed to resolve the critical drawbacks of lithium-sulfur(Li-S)batteries,the intractable issues including undesirable shuttling of polysulfides and sluggish redox reaction kinetics have still been unresolved thoroughly.Herein,a cobalt single-atom(CoSA)catalyst comprising of atomic Co distributed homogeneously within nitrogen(N)-doped porous carbon(Co-NPC)nanosphere is constructed and utilized as a separator coating in Li-S batteries.The Co-NPC exposes abundant active sites participating in sulfur redox reactions,and remarkable catalytic activity boosting the rapid polysulfide conversions.As a result,Li-S batteries with Co-NPC coating layer realize significantly enhanced specific capacity(1295 mah·g^(-1)at 0.2 C),rate capability(753 mah·g^(-1)at 3.0 C),and long-life cyclic stability(601 mah·g^(-1)after 500 cycles at 1.0 C).Increasing the areal sulfur loading to 6.2 mg·cm^(-2),an extremely high areal capacity of 7.92 mah·cm^(-2)is achieved.Further in situ X-ray diffraction,density functional theory calculations,and secondary ion mass spectrometry confirm the high catalytic capability of CoSA towards reversible polysulfide conversion.This study supplies new insights for adopting single-atom catalyst to upgrade the electrochemical performance of Li-S batteries.

关键词： lithium-sulfur batteries polysulfide shuttling sluggish redox kinetics cobalt single-atom catalyst catalytic capability

Guest editorial: AI and edge computing driven technologies and applications

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Digital Communications and Networks 2023年第2期9卷 448-449页

作者： Jianhui Lv Yuhui Shi Hui Cheng Zhiwei Lin lianbo ma Peng Cheng Laboratory China Southern University of Science and Technology China University of Hertfordshire UK Queen's University Belfast UK Northeastern University China

1.Introduction Emerging networking paradigms,including Information-Centric Networking(ICN)[1],Software-Defined Networking(SDN)[2],Mobile Satellite Communication Networks(MSCN)[3],and Internet of Vehicles(IoV)[4],have faced some severe challenges.For example,the dynamic network environment makes it very hard to optimize resource allocation.In addition,these networking paradigms usually have heterogeneous features,making it difficult to schedule traffic among different kinds of networks.These challenges can be addressed by the adaptive learning of Artificial Intelligence(AI)[5,6]and the edge caching of edge computing.AI can also help establish a relatively optimal routing strategy and perform congestion control by learning the dynamic network state.Just like AI,edge computing[7–10]can help provide fast response to users,and deploy edge servers with strong computing and storage capabilities can greatly improve the performance of 4K/8K and VR/AR.However,despite their ability to improve network performance,there are still many challenges.For example,the integrated architectures and frameworks need to be clearly identified,and the related protocols need to be better defined.

关键词： network computing edge

Nitrogen-doped graphene:Synthesis,characterizations and energy applications

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Journal of Energy Chemistry 2018年第1期27卷 146-160页

作者： Haifeng Xu lianbo ma Zhong Jin Key Laboratory of Mesoscopic Chemistry of MOE.School of Chemistry and Chemical Engineering Nanjing UniversityNanjing 210023Jiangsu.China School of Mechanical and Electronic Engineering Suzhou UniversitySuzhou 234000AnhuiChina

Nitrogen-doped（N-doped） graphene has attracted increasing attentions because of the significantly enhanced properties in physic, chemistry, biology and material science, as compared with those of pristine graphene. By date, N-doped graphene has opened up an exciting new field in the science and technology of two-dimensional materials. From the viewpoints of chemistry and materials, this article presents an overview on the recent progress of N-doped graphene, including the typical synthesis methods, characterization techniques, and various applications in energy fields. The challenges and perspective of Ndoped graphene are also discussed. We expect that this review will provide new insights into the further development and practical applications of N-doped graphene.

关键词： N-doped graphene Synthesis Characterization Energy applications

VOC emitted by biopharmaceutical industries:Source profiles,health risks,and secondary pollution

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Journal of Environmental Sciences 2024年第1期135卷 570-584页

作者： Jiawei ma Lin Li State Key Laboratory of Environmental Aquatic Chemistry Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China University of Chinese Academy of Sciences Beijing 100049China National Engineering Laboratory for VOCs Pollution Control material&Technology University of Chinese Academy of SciencesBeijing 101408China

The biopharmaceutical industry contributes substantially to volatile organic compounds(VOCs)emissions,causing growing concerns and social developmental conflicts.This study conducted an on-site investigation of the process-based emission of VOCs from three biopharmaceutical enterprises.In the workshops of the three enterprises,26 VOCs were detected,which could be sorted into 4 classes:hydrocarbons,aromatic hydrocarbons,oxygen-containing compounds,and nitrogen-containing compounds.Ketones were the main components of waste gases,accounting for 44.13%-77.85%of the overall VOCs.Process-based source profiles were compiled for each process unit,with the fermentation and extraction units of tiamulin fumarate being the main source of VOC emissions.Dimethyl heptanone,vinyl acetate,diethylamine,propylene glycol methyl ether(PGME),and benzene were screened as priority pollutants through a fuzzy comprehensive evaluation system.Ground level concentration simulation results of the Gauss plume diffusion model demonstrated that the diffusivity of VOCs in the atmosphere was relatively high,indicating potential non-carcinogenic and carcinogenic risks 1.5-2 km downwind.Furthermore,the process-based formation potentials of ozone and secondary organic aerosols(SOAs)were determined and indicated that N-methyl-2-pyrrolidone,dimethyl heptanone,and PGME should be preferentially controlled to reduce the ozone formation potential,whereas the control of benzene and chlorobenzene should be prioritized to reduce the generation of SOAs.Our results provide a basis for understanding the characteristics of VOC emission by biopharmaceutical industries and their diffusion,potentially allowing the development of measures to reduce health risks and secondary pollution.

关键词： Biopharmaceutical Volatile organic compound Priority pollutant Exposure risk Secondary pollution

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进化深度学习的研究现状与进展

信息与控制 2024年第2期53卷 129-153页

作者：李楠贺美蕊马连博东北大学软件学院

近些年，深度学习在工业界和学术界取得了令人瞩目的发展。然而，深度模型的超参数配置通常需要巨大的计算开销和专家知识。进化计算作为一种高效的启发式搜索方式，在深度模型的自动化配置中已经展现出显著的优势，能够有效缓解上述问... 详细信息

近些年，深度学习在工业界和学术界取得了令人瞩目的发展。然而，深度模型的超参数配置通常需要巨大的计算开销和专家知识。进化计算作为一种高效的启发式搜索方式，在深度模型的自动化配置中已经展现出显著的优势，能够有效缓解上述问题，这种方法也被称为进化深度学习。本文从自动机器学习的视角分析进化深度学习。具体来讲，首先结合进化计算和深度学习的特点，阐述进化深度学习的概念和优化模型。在此基础上，从深度学习的生命周期出发，系统地介绍了数据准备、模型生成和模型部署三个阶段的进化深度学习方法。此外，分析并讨论了不同的解表示和搜索范式。最后，本文提供了进化深度学习的相关应用，开放问题及潜在研究方向。本文综述了进化深度学习的最新进展，并为其未来的发展提出了一些指导性的建议。

关键词：进化计算进化深度学习数据准备模型生成模型部署

3D N,O-Codoped Egg-Box-Like Carbons with Tuned Channels for High Areal Capacitance Supercapacitors

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纳微快报：英文版 2020年第7期12卷 1-12页

作者： Feng Wei Xiaojun He lianbo ma Hanfang Zhang Nan Xiao Jieshan Qiu School of Chemistry and Chemical Engineering Anhui Key Laboratory of Coal Clean Conversion and High Valued UtilizationAnhui University of TechnologyMaanshan 243002AnhuiPeople’s Republic of China School of materials Science and Engineering Anhui University of TechnologyMaanshan 243002AnhuiPeople’s Republic of China School of Chemical Engineering Dalian University of TechnologyDalian 116024LiaoningPeople’s Republic of China College of Chemical Engineering Beijing University of Chemical TechnologyBeijing 100029People’s Republic of China

Functional carbonaceous materials for supercapacitors(SCs)without using acid for post-treatment remain a substantial challenge.In this paper,we present a less harmful strategy for preparing three-dimensional(3D)N,O-codoped egg-box-like carbons(EBCs).The as-prepared EBCs with opened pores provide plentiful channels for ion fast transport,ensure the e ective contact of EBCs electrodes and electrolytes,and enhance the electron conduction.The nitrogen and oxygen atoms doped in EBCs improve the surface wettability of EBC electrodes and provide the pseudocapacitance.Consequently,the EBCs display a prominent areal capacitance of 39.8μF cm-2(340 F g-1)at 0.106 m A cm-2 in 6 M KOH electrolyte.The EBC-based symmetric SC manifests a high areal capacitance to 27.6μF cm-2(236 F g-1)at 0.1075 m A cm-2,a good rate capability of 18.8μF cm-2(160 F g-1)at 215 m A cm-2 and a long-term cycle stability with only 1.9%decay after 50,000 cycles in aqueous electrolyte.Impressively,even in all-solid-state SC,EBC electrode shows a high areal capacitance of 25.0μF cm-2(214 F g-1)and energy density of 0.0233 m Wh cm-2.This work provides an acid-free process to prepare electrode materials from industrial by-products for advanced energy storage devices.

关键词： Egg-box-like carbon Opened pores in pores Areal capacitance All-solid-state supercapacitor

Nuclear phylogenomics of angiosperms and insights into their relationships and evolution

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Journal of Integrative Plant Biology 2024年第3期66卷 546-578页

作者： Guojin Zhang Hong ma College of Life Sciences Hunan Normal UniversityChangsha 410081China Department of Biology 510 Mueller LaboratoryHuck Institutes of the Life SciencesThe Pennsylvania State UniversityUniversity ParkPA 16802USA

Angiosperms(flowering plants) are by far the most diverse land plant group with over 300,000 species. The sudden appearance of diverse angiosperms in the fossil record was referred to by Darwin as the “abominable mystery,”hence contributing to the heightened interest in angiosperm evolution. Angiosperms display wide ranges of morphological, physiological,and ecological characters, some of which have probably influenced their species richness. The evolutionary analyses of these characteristics help to address questions of angiosperm diversification and require well resolved phylogeny. Following the great successes of phylogenetic analyses using plastid sequences,dozens to thousands of nuclear genes from next-generation sequencing have been used in angiosperm phylogenomic analyses, providing well resolved phylogenies and new insights into the evolution of angiosperms. In this review we focus on recent nuclear phylogenomic analyses of large angiosperm clades, orders, families,and subdivisions of some families and provide a summarized Nuclear Phylogenetic Tree of Angiosperm Families. The newly established nuclear phylogenetic relationships are highlighted and compared with previous phylogenetic results. The sequenced genomes of Amborella,Nymphaea, Chloranthus, Ceratophyllum, and species of monocots, magnoliids, and basal eudicots, have facilitated the phylogenomics of relationships among five major angiosperms clades. All but one of the 64 angiosperm orders were included in nuclear phylogenomics with well resolved relationships except the placements of several orders. Most families have been included with robust and highly supported placements, especially for relationships within several large and important orders and families.Additionally, we examine the divergence time estimation and biogeographic analyses of angiosperm on the basis of the nuclear phylogenomic frameworks and discuss the differences compared with previous analyses. Furthermore,we discuss the implications of nuclear phylogenomic analyses on ancestral

关键词： angiosperms evolution flowering plants nuclear gene phylogenomics phylogeny

Uniform decomposition of velocity gradient tensor

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Journal of Hydrodynamics 2024年第1期36卷 24-34页

作者： Chenxi ma Chaoqun Liu Department of mathematics University of Texas at ArlingtonArlingtonTXUSA

In this paper,the principal decomposition of the velocity gradient tensor[∇v]is discussed in 3 cases based on the discriminant∆:∆0 with 3 distinct real eigen values,and∆=0 with 1 or 2 distinct real eigen values.The velocity gradient tensor can also be classified as rotation point,which can be decomposed into three parts,i.e.,rotation[R],shear[S]and stretching/compression[SC],and non-rotation point,we defined a new resistance term[L],and the tensor can be decomposed into three parts,i.e.,resistance[L],shear[S]and stretching/compression[SC].Example matric are also displayed to demonstrate the new decomposition.Connections of principal decomposition between 3 different cases,and between Resistance and Liutex will also be discussed.

关键词： Velocity gradient Liutex resistance fluid kinematics