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Oxide-based cathode materials for rechargeable zinc ion batteries:Progresses and challenges

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Journal of Energy Chemistry 2021年第6期30卷 516-542,I0013页

作者： Yingze Zhou Fandi Chen Hamidreza Arandiyan peiyuan guan Yunjian Liu Yuan Wang Chuan Zhao Danyang Wang Dewei Chu School of Materials Science and Engineering The University of New South WalesSydney 2052Australia Laboratory of Advanced Catalysis for Sustainability School of ChemistryThe University of SydneySydney 2006Australia The University of Sydney Nano Institute(Sydney Nano) The University of SydneyNSW 2006Australia School of Material Science and Technology Jiangsu UniversityZhenjiang 212013JiangsuChina School of Chemistry The University of New South WalesSydneyNew South Wales 2052Australia

With the increasing demands for electrical energy storage technologies,rechargeable zinc ion batteries(ZIBs)have been rapidly developed in recent years owing to their high safety,low cost and high energy storage *** cathode is an essential part of ZIBs,which hosts zinc ions and determines the capacity,rate and cycling performance of the *** mainstream cathodes for ZIBs are oxidebased materials with tunnel,layer or 3 D crystal *** this review,we mainly focus on the latest advanced oxide-based cathode materials in ZIBs,including manganese oxides,vanadium oxides,spinel compounds,and other metal oxide based *** addition,the mechanisms of zinc storage and recent development in cathode design have been discussed in ***,current challenges and perspectives for the future research directions of oxide-based cathodes in ZIBs are presented.

关键词： Zinc ion batteries Oxide-based cathode Manganese oxides cathode Vanadium oxides cathode

Recent advances in flexible alkaline zinc-based batteries:Materials,structures,and perspectives

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Journal of Energy Chemistry 2023年第12期87卷 61-88,I0004页

作者： Yanzhe Zhu peiyuan guan Renbo Zhu Shuo Zhang Ziheng Feng Mengyao Li Tao Wan Long Hu Yunjian Liu Qin Li Juan Yu Dewei Chu School of Materials Science and Engineering The University of New South WalesSydneyNSW 2052Australia School of Material Science and Engineering Jiangsu UniversityZhenjiang 212013JiangsuChina Queensland Micro-and Nanotechnology Centre School of Engineering and Built Environment Griffith UniversityBrisbane QLD 4111Australia School of Metallurgical Engineering Xi’an University of Architecture and TechnologyXi’an 710055ShaanxiChina

The development of wearable electronic systems has generated increasing demand for flexible power *** zinc(Zn)-based batteries,as one of the most mature energy storage technologies,have been considered as a promising power source owing to their exceptional safety,low costs,and outstanding electrochemical ***,the conventional alkaline Zn-based battery systems face many challenges associated with electrodes and electrolytes,causing low capacity,poor cycle life,and inferior mechanical *** advances in materials and structure design have enabled the revisitation of the alkaline Zn-based battery technology for applications in flexible ***,we summarize the up-to-date works in flexible alkaline Zn-based batteries and analyze the strategies employed to improve battery ***,we introduce the three most reported cathode materials(including Ag-based,Ni-based,and Co-based materials)for flexible alkaline Zn-based ***,challenges and modifications in battery anodes are ***,the recently advanced gel electrolytes are introduced from their properties,functions as well as advanced ***,recent works and the advantages of sandwich-type,fiber-type and thin film-type flexible batteries are summarized and *** review provides insights and guidance for the design of high-performance flexible Zn-based batteries for next-generation electronics.

关键词： Alkaline zinc-based batteries Cathode materials Anodeissue Gel electrolytes Flexibility Design strategy

High Areal Capacity and Long Cycle Life Flexible Mild Quasi-Solid-State Ag-Zn Battery with Dendrite-Free Anode

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Energy & Environmental Materials 2024年第1期7卷 34-41页

作者： Yanzhe Zhu Renbo Zhu Fandi Chen Shuo Zhang Yu-Chieh Kuo peiyuan guan Mengyao Li Yunjian Liu Zhaojun Han Tao Wan Dawei Wang Caiyun Wang Dewei Chu School of Materials Science and Engineering The University of New South WalesSydneyNew South Wales 2052Australia School of Material science and Engineering Jiangsu UniversityZhenjiang 212013China School of Chemical Engineering The University of New South WalesSydneyNew South Wales 2052Australia Intelligent Polymer Research Institute AIIMInnovation CampusUniversity of WollongongNorth Wollongong New South Wales 2522Australia

Silver-zinc(Ag-Zn)batteries are a promising battery system for flexible electronics owing to their high safety,high energy density,and stable output ***,poor cycling performance,low areal capacity,and inferior flexibility limit the practical application of Ag-Zn ***,we develop a flexible quasi-solid-state Ag-Zn battery system with superior performance by using mild electrolyte and binder-free *** foam current collector is introduced to impede the growth of Zn dendrite,and the structure of Ag cathode is engineered by electrodeposition and chloridization process to improve the areal *** novel battery demonstrates a remarkable cycle retention of 90%for 200 cycles at 3 mA cm^(-2).More importantly,this binder-free battery can afford a high capacity of 3.5 mAh cm^(-2)at 3 mA cm^(-2),an outstanding power density of 2.42 mW cm^(-2),and a maximum energy density of 3.4 mWh cm^(-2).An energy management circuit is adopted to boost the output voltage of a single battery,which can power electronic ink display and Bluetooth temperature and humidity *** developed battery can even operate under the extreme conditions,such as being bent and sealed in solid *** work offers a path for designing electrodes and electrolyte toward high-performance flexible Ag-Zn batteries.

关键词： binder-free electrodes dendrite-free flexible Ag-Zn battery mild electrolyte quasi-solid-state

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一种基于词义和词频的向量空间模型改进方法

计算机应用研究 2019年第5期36卷 1390-1395页

作者：邓晓衡杨子荣关培源中南大学软件学院长沙410075

文本内容较多时,传统的向量空间模型(VSM)建模可能产生维数爆炸现象,效率低下且难以保证分类效果。针对VSM高维现象,利用词义和词频降低文本建模维度的方法提高效率和准确度,提出一种多义词判别优化的同义词聚类方法,结合上下文判别多... 详细信息

文本内容较多时,传统的向量空间模型(VSM)建模可能产生维数爆炸现象,效率低下且难以保证分类效果。针对VSM高维现象,利用词义和词频降低文本建模维度的方法提高效率和准确度,提出一种多义词判别优化的同义词聚类方法,结合上下文判别多义词的词义后,根据特征项词义相似度进行加权,合并词义相近的特征项。新方法使特征向量维度大大降低,多义词判别提高了文本特征提取的准确性。与其他文本特征提取和文本分类方法进行比较,结果表明,该算法在效率和准确度上有明显提高。

关键词：文本分类特征选择卡方分布向量空间模型

基于移动医疗大数据平台下降低能量消耗机会网络的研究与应用

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计算机应用研究 2015年第12期32卷 3790-3793页

作者：关培源陈志刚王云华吴嘉刘辉中南大学软件学院长沙410075 "移动医疗"教育部-中国移动联合实验室长沙410083 中南大学湘雅二医院长沙410000

医疗过程中会产生大量的数据信息,但是海量的医疗数据与有限的网络资源存在矛盾,因此需要压缩传输信息,从而降低传输过程中的能量消耗。对机会网络中的信息发送、接收过程进行分析,建立了减少能耗有效性数据传输路由算法(reduce energy ... 详细信息

医疗过程中会产生大量的数据信息,但是海量的医疗数据与有限的网络资源存在矛盾,因此需要压缩传输信息,从而降低传输过程中的能量消耗。对机会网络中的信息发送、接收过程进行分析,建立了减少能耗有效性数据传输路由算法(reduce energy effective data transmission algorithm,REEDT)。该算法通过对发送数据进行有效筛选,建立了优化的信息发送和接收机制。经过仿真实验,并与Spray and Wait和Binary Spray and Wait算法比较,该算法降低了网络传输的能量消耗。

关键词：机会网络大数据移动医疗能量消耗

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基于综合信任的边缘计算资源协同研究

计算机研究与发展 2018年第3期55卷 449-477页

作者：邓晓衡关培源万志文刘恩陆罗杰赵智慧刘亚军张洪刚中南大学信息科学与工程学院长沙410075 中南大学软件学院长沙410075 马萨诸塞大学波士顿分校工程系波士顿021253393

边缘计算旨在共享利用边缘设备的计算、通信资源,满足人们对服务的实时响应、隐私与安全、计算自主性等需求,随物联网的发展将有广阔应用前景.调研了边缘计算的特征、基本概念和定义、最新研究进展以及边缘计算研究的挑战与发展趋势.基... 详细信息

边缘计算旨在共享利用边缘设备的计算、通信资源,满足人们对服务的实时响应、隐私与安全、计算自主性等需求,随物联网的发展将有广阔应用前景.调研了边缘计算的特征、基本概念和定义、最新研究进展以及边缘计算研究的挑战与发展趋势.基于边缘计算的核心挑战之一——隐私信任与安全保障问题,针对用户应用需求特征,充分考虑用户体验质量(QoE)来优化边缘计算系统.通过集成用户和资源的身份信任、行为信任、能力信任3个方面为综合信任度,利用信任评估保障对边缘计算资源管理与协同优化.针对终端的动态性、边缘设施能力受限、边缘与终端的邻近性、云中心功能强和距离远的特征,融合云计算、P2P计算、C/S与网格计算模式,构建多层自适应的统一计算模型,实现对应用场景动态匹配;研究以用户体验质量为目标的综合资源/用户信任评估体系与模型,实现资源QoS向QoE的指标映射,构建资源和用户的身份信任、行为信任评价机制,形成综合信任评估体系与模型;根据应用需求,研究面向计算能力、移动性与可用服务时间、剩余能量、带宽等多重约束的边缘计算的任务卸载、资源调度算法和优化方案,实现资源在终端、边缘、云中心3层级可信共享和优化利用,更好满足用户QoE需求.最后通过流计算任务分配的边缘计算场景验证了模型框架的有效性.

关键词：分布式计算边缘计算雾计算移动边缘计算物联网综合信任

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混合增强视觉认知架构及其关键技术进展

中国图象图形学报 2021年第11期26卷 2619-2629页

作者：王培元关欣海军航空大学烟台264001

智能视觉系统虽然在大规模信息的特征检测、提取与匹配等处理上具备一定优势,但是在深层次认知上仍存在不确定性和脆弱性,尤其是针对视觉感知基础上的视觉认知任务,相关数理逻辑和图像处理方法并未实现质的突破,智能算法难以取代人类执... 详细信息

智能视觉系统虽然在大规模信息的特征检测、提取与匹配等处理上具备一定优势,但是在深层次认知上仍存在不确定性和脆弱性,尤其是针对视觉感知基础上的视觉认知任务,相关数理逻辑和图像处理方法并未实现质的突破,智能算法难以取代人类执行较为复杂的理解、推理、决策和学习等操作。为助力智能视觉感知和认知技术的进一步发展,本文总结了混合增强智能在视觉认知领域的应用现状,给出了混合增强视觉认知的基本架构,并对可纳入该架构下的应用领域及关键技术进行了综述。首先,在分析智能视觉感知内涵和基本范畴的基础上,融合人的视觉感知与心理认知,探讨混合增强视觉认知的定义、范畴及其深化过程,对不同的视觉信息处理阶段进行对比,进而在分析相关认知模型发展现状的基础上,构建混合增强视觉认知的基本框架。该架构不仅可依靠智能算法进行快速地检测、识别、理解等处理,最大限度地挖掘“机”的计算潜能,而且可凭借适时、适当的人工推理、预测和决策有效增强系统认知的准确性和可靠性,最大程度地发挥人的认知优势。其次,分别从混合增强的视觉监测、视觉驾驶、视觉决策以及视觉共享等4个领域探讨可纳入该架构的代表性应用及存在的问题,指出混合增强视觉认知架构是现有技术条件下能够更好地发挥计算机效能、减轻人处理信息压力的方式。最后,基于高、中、低计算机视觉处理技术体系,分析混合增强视觉认知架构中部分中高级视觉处理技术的宏观、微观关系,重点综述可视化分析、视觉增强、视觉注意、视觉理解、视觉推理、交互式学习以及认知评估等关键技术。混合增强视觉认知架构有助于突破当前视觉信息认知“弱人工智能”的瓶颈,将有力促进智能视觉系统向人机深度融合方向发展。下一步,还需在纯粹的基础创新、高效的人机交互、柔性的连接通路等方面开展更加深入的研究。

关键词：视觉认知视觉感知智能视觉感知混合增强视觉认知人机融合

Is oral microbiome of children able to maintain resistance and functional stability in response to short-term interference of ingesta?

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Protein & Cell 2021年第6期12卷 502-510页

作者： Fangqiao Wei Xiangyu Sun Yufeng Gao Haoyu Dou Yang Liu Lili Su Haofei Luo Ce Zhu Qian Zhang peiyuan Tong Wen Ren Zhe Xun Ruochun Guo Yuanlin guan Shenghui Li Yijun Qi Junjie Qin Feng Chen Shuguo Zheng Department of Preventive Dentistry Peking University School and Hospital of StomatologyNational Clinical Research Center for Oral DiseasesNational Engineering Laboratory for Digital and Material Technology of StomatologyBeijing Key Laboratory of Digital StomatologyBeijing 100081China Central Laboratory Peking University School and Hospital of StomatologyNational Clinical Research Center for Oral DiseasesNational Engineering Laboratory for Digital and Material Technology of StomatologyBeijing Key Laboratory of Digital StomatologyBeijing 100081China Promegene Institute Shenzhen 518110China Tsinghua-Peking Center for Life Sciences Beijing 100084China

Dear Editor,A series of studies had focused on the ecological stability of human microbiome(Lozupone et al.,2012;Faith et al.,2013;Moya and Ferrer,2016).Despite the continuous perturbation and the highly personalized composition within the human microbiome(Human Microbiome Project,2012),healthy adults stably maintain their microbial communities in terms of space and time(Faith et al.,2013;Moya and Ferrer,2016;Oh et al.,2016).This stability is proved to be critical for the well-being of human body(Lozupone et al.,2012).On the contrary,major shifts in microbial community composition are often related to diseases(Lynch and Pedersen,2016).

关键词： stability maintain perturbation

Self-assembled multifunctional Fe_(3)O_(4) hierarchical microspheres: high-efficiency lithium-ion battery materials and hydrogenation catalysts

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Science China Materials 2021年第5期64卷 1058-1070页

作者： Konglin Wu Min Ling peiyuan Zeng Liang Zhang Tao Wu Pingli guan Weng-Chon Cheong Zheng Chen Zhen Fang Xianwen Wei Institute of Clean Energy and Advanced Nanocatalysis(iClean) School of Chemistry and Chemical EngineeringAnhui University of TechnologyMaanshan 243002China College of Chemistry and Materials Science Key Laboratory of Electrochemical Clean Energy of Anhui Higher Education Institutesthe Key Laboratory of Functional Molecular SolidsMinistry of EducationAnhui Normal UniversityWuhu 241002China Department of Physics and Chemistry Faculty of Science and TechnologyUniversity of MacaoMacaoChina

Self-assembled Fe_(3)O_(4)hierarchical microspheres(HMSs) were prepared by a one-pot synchronous reduction–self-assembling (SRSA) hydrothermal *** this simple and inexpensive synthetic process,only glycerol,water,and a single iron source (potassium ferricyanide (K3[Fe(CN)6]))were employed as reactants without additional reductants,surfactants,or *** iron source,K3[Fe(CN)6],and glycerol significantly affected the synthesis of Fe_(3)O_(4)***_(3)O_(4)HMSs with a self-assembled spherical shape readily functioned as high-performance anode materials for lithiumion batteries with a specific capacity of>1000 mA h g^(-1)at0.5 A g^(-1)after 270 *** charging and discharging results revealed that Fe_(3)O_(4)HMSs displayed good reversible performance (>1000 mA h g^(-1)) and cycling stability (700 cycles) at 0.5 A g^(-1).Furthermore,as multifunctional materials,the as-obtained Fe_(3)O_(4)HMSs also exhibited high saturation magnetization (99.5 emu g^(-1)) at room temperature (25°C) and could be further employed as efficient and magnetically recyclable catalysts for the hydrogenation of nitro compounds.

关键词： iron oxide hierarchical structure energy storage material lithium-ion battery hydrogenation catalyst