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Construction of strong built-in electric field in binary metal sulfide heterojunction to propel high-loading lithium-sulfur batteries

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Journal of Energy Chemistry 2023年第6期81卷 492-501,I0011页

作者： Weiming Xiong Jiande Lin Huiqun Wang Sha Li Junhao Wang Yuxiang Mao Xiao Zhan De-Yin Wu Li Zhang State Key Laboratory of Physical Chemistry of Solid Surfaces Department of Chemical and Biochemical EngineeringCollege of Chemistry and Chemical EngineeringCollaborative Innovation Centre of Chemistry for Energy Materials(iChEM)Xiamen UniversityXiamen 361005FujianChina

The practical application of lithium-sulfur(Li-S)batteries is greatly hindered by soluble polysulfides shuttling and sluggish sulfur redox *** design of multifunctional hybrid materials with superior electronic conductivity and high electrocatalytic activity,e.g.,heterostructures,is a promising strategy to solve the above ***,a binary metal sulfide MnS-MoS_(2) heterojunction electrocatalyst is first designed for the construction of high-sulfur-loaded and durable Li-S *** MnS-MoS_(2) p-n heterojunction shows a unique structure of MoS_(2) nanosheets decorated with ample MnS nanodots,which contributes to the formation of a strong built-in electric field at the two-phase *** MnS-MoS_(2) hybrid host shows strong soluble polysulfide affinity,enhanced electronic conductivity,and exceptional catalytic effect on sulfur *** from the synergistic effect,the as-derived S/MnS-MoS_(2) cathode delivers a superb rate capability(643 m A h g^(-1)at 6 C)and a durable cyclability(0.048%decay per cycle over 1000 cycles).More impressively,an areal capacity of 9.9 m A h cm^(-2)can be achieved even under an extremely high sulfur loading of 14.7 mg cm^(-2)and a low electrolyte to sulfur ratio of 2.9μL mg^(-1).This work provides an in-depth understanding of the interfacial catalytic effect of binary metal compound heterojunctions on sulfur reaction kinetics.

关键词： Lithium-sulfur battery MnS-MoS_(2)heterojunction Built-in electric field Sulfur reaction kinetics High sulfur loading

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Ultra-thick,dense dual-encapsulated Sb anode architecture with conductively elastic networks promises potassium-ion batteries with high areal and volumetric capacities

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eScience 2023年第6期3卷 58-68页

作者： Zhonggang Liu Xi Liu Bingchun Wang Xinying Wang Dongzhen Lu Dijun Shen Zhefei Sun Yongchang Liu Wenli Zhang Qiaobao Zhang Yunyong Li School of Materials and Energy Guangdong University of TechnologyNo.100 Waihuan Xi RoadGuangzhou Higher Education Mega CenterGuangzhou 510006China State Key Laboratory of Physical Chemistry of Solid Surfaces College of MaterialsXiamen UniversityXiamenFujian 361005China Beijing Advanced Innovation Center for Materials Genome Engineering Institute for Advanced Materials and TechnologyState Key Laboratory for Advanced Metals and MaterialsUniversity of Science and Technology BeijingBeijing 100083China Guangdong Provincial Key Laboratory of Plant Resources Biorefinery School of Chemical Engineering and Light IndustryGuangdong University of TechnologyNo.100 Waihuan Xi RoadGuangzhou Higher Education Mega CenterGuangzhou 510006China

Ultra-thick,dense alloy-type anodes are promising for achieving large areal and volumetric performance in potassium-ion batteries(PIBs),but severe volume expansion as well as sluggish ion and electron diffusion kinetics heavily impede their widespread ***,we design highly dense(3.1 g cm^(-3))Ti_(3)C_(2)T_(x) MXene and graphene dual-encapsulated nano-Sb monolith architectures(HD-Sb@Ti_(3)C_(2)T_(x)-G)with high-conductivity elastic networks(1560 S m^(-1))and compact dually encapsulated structures,which exhibit a large volumetric capacity of 1780.2 mAh cm^(-3)(gravimetric capacity:565.0 mAh g^(-1)),a long-term stable lifespan of 500 cycles with 82%retention,and a large areal capacity of 8.6 mAh cm^(-2)(loading:31 mg cm^(-2))in *** ex-situ SEM,in-situ TEM,kinetic investigations,and theoretical calculations,we reveal that the excellent areal and volumetric performance mechanism stems from the three dimensional(3D)high-conductivity elastic networks and the dualencapsulated Sb architecture of Ti_(3)C_(2)T_(x) and graphene;these effectively mitigate against volume expansion and the pulverization of Sb,offering good electrolyte penetration and rapid ionic/electronic ***_(3)C_(2)T_(x) also decreases the Kþdiffusion energy barrier,and the ultra-thick compact electrode ensures volumetric and areal *** findings provide a feasible strategy for fabricating ultra-thick,dense alloy-type electrodes to achieve high areal and volumetric capacity energy storage via highly-dense,dual-encapsulated architectures with conductive elastic networks.

关键词： Antimony Dually encapsulated structure Compact monolith Areal capacity Volumetric capacity Potassium-ion batteries

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Recent Advances on Polyoxometalate-Based Ion-Conducting Electrolytes for Energy-Related Devices

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Energy & Environmental Materials 2023年第2期6卷 262-274页

作者： Dongming Cheng Ke Li Hongying Zang Jiajia Chen Key Laboratory of Polyoxometalate and Reticular Material Chemistry of Ministry of Education at Universities of Jilin Province Faculty of ChemistryNortheast Normal UniversityChangchun 130024China State Key Laboratory of Physical Chemistry of Solid Surfaces Department of ChemistryCollege of Chemistry and Chemical EngineeringCollaborative Innovation Centre of Chemistry for Energy MaterialsXiamen UniversityXiamen 361005China

Solid-state electrolytes have attracted considerable attention in new energyrelated devices due to their high safety and broad application ***(POMs)are a kind of molecular-level cluster compounds with unique *** recent years,owing to their abundant physicochemical properties(including high ionic conductivity and reversible redox activity),POMs have shown great potential in becoming a new generation of solid-state *** this review,an overview is investigated about how POMs have evolved as ion-conducting materials from basic research to novel solid-state electrolytes in energy ***,some expressive POM-based ion-conducting materials in recent years are introduced and classified,mainly inspecting their structural and functional *** that,it is further focused on the application of these ionconducting electrolytes in the fields of proton exchange membranes,supercapacitors,and ion *** addition,some properties of POMs(such as inherent dimension,capable of forming stable hydrogen bonds,and reversible bonding to water molecules)enable these functional POM-based electrolytes to be employed in innovative applications such as ion selection,humidity sensing,and smart ***,some fundamental recommendations are given on the current opportunities and challenges of POM-based ion-conducting electrolytes.

关键词： energy devices ion conduction polyoxometalates solid-state electrolytes

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紫外光引发原位交联多功能粘结剂构筑稳固硫正极

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电化学 2023年第4期29卷 58-67页

作者：李莎湛孝王顾莲王慧群熊伟明张力固体表面物理化学国家重点实验室厦门大学化学化工学院能源材料化学协同创新中心嘉庚创新实验室福建厦门361005 山东大学化学与化工学院胶体与界面化学教育部重点实验室山东济南250100

锂硫电池因其高理论比容量和高能量密度的独特优势,在下一代储能体系中展现出重要的应用前景。然而,锂硫电池的商业化进程仍面临诸多挑战:如可溶性多硫化锂中间产物造成的“穿梭”问题、充放电过程中体积变化剧烈以及电极硫负载增大时... 详细信息

锂硫电池因其高理论比容量和高能量密度的独特优势,在下一代储能体系中展现出重要的应用前景。然而,锂硫电池的商业化进程仍面临诸多挑战:如可溶性多硫化锂中间产物造成的“穿梭”问题、充放电过程中体积变化剧烈以及电极硫负载增大时的严重极化等,易导致硫正极的结构坍塌和电化学性能的快速衰变。电池作为一个有机整体,其性能优化是一个系统工程,上述挑战对电池内的每一个组分都提出了更高的要求,例如发展具有更好机械性能的新型粘结剂。在本工作中,我们首次在硫正极中引入乙氧基化三羟甲基丙烷三丙酸酯单体,通过紫外光辅助固化实现原位交联,并与传统聚偏氟乙烯粘结剂构成二元粘结剂(简称c-ETPTA/PVDF),用于制备高强度、高硫负载的长寿命锂硫电池。结果表明,采用共价交联的c-ETPTA/PVDF粘结剂不但能显著增强电极极片的机械性能,保持循环过程中的结构稳定性,还可借助其丰富的含氧官能团对溶解性多硫化锂中间产物进行高效地捕获。此外,c-ETPTA/PVDF中的醚氧键与锂离子之间适度的相互作用也有助于锂离子的快速输送。因此,S-c-ETPTA/PVDF电极在2C倍率下可稳定循环1000次以上,且每个周期的容量衰减率仅为0.038%。即使当硫面载量提高至7.8 mgs·cm^(-2)时,经过50个周期循环后,仍可输出6.2 mAh·cm^(-2)的高平均放电面容量。本工作展示了紫外光引发原位交联技术在制备稳固的高能量密度锂硫电池方面的巨大应用前景。

关键词：锂硫电池紫外固化原位交联多功能粘结剂高强度电极

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Building better solid-state batteries with silicon-based anodes

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Interdisciplinary Materials 2023年第4期2卷 635-663页

作者： Zhefei Sun Quanzhi Yin Haoyu Chen Miao Li Shenghui Zhou Sifan Wen Jianhai Pan Qizheng Zheng Bing Jiang Haodong Liu Kangwoon Kim Jie Li Xiang Han Yan-Bing He Li Zhang Meicheng Li Qiaobao Zhang State Key Laboratory of Physical Chemistry of Solid Surfaces College of MaterialsXiamen UniversityXiamenFujianChina State Key Laboratory of Physical Chemistry of Solid Surfaces College of Chemistry and Chemical EngineeringCollaborative Innovation Center of Chemistry for Energy MaterialsTan Kah Kee Innovation LaboratoryXiamen UniversityXiamenFujianChina State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources School of New EnergyNorth China Electric Power UniversityBeijingChina Center for Memory and Recording Research Building University of California San DiegoLa JollaCaliforniaUSA Department of Energy Politecnico di MilanoMilanItaly Co-Innovation Center of Efficient Processing and Utilization of Forest Resources College of Materials Science and EngineeringNanjing Forestry UniversityNanjingJiangsuChina Tsinghua Shenzhen International Graduate School Shenzhen All-Solid-State Lithium Battery Electrolyte Engineering Research Center and Shenzhen Geim Graphene CenterInstitute of Materials Research(IMR)Tsinghua UniversityShenzhenChina Shenzhen Research Institute of xiamen university ShenzhenChina

Silicon(Si)-based solid-state batteries(Si-SSBs)are attracting tremendous attention because of their high energy density and unprecedented safety,making them become promising candidates for next-generation energy storage ***,the commercialization of Si-SSBs is significantly impeded by enormous challenges including large volume variation,severe interfacial problems,elusive fundamental mechanisms,and unsatisfied electrochemical ***,some unknown electrochemical processes in Si-based anode,solid-state electrolytes(SSEs),and Si-based anode/SSE interfaces are still needed to be explored,while an in-depth understanding of solid–solid interfacial chemistry is insufficient in *** review aims to summarize the current scientific and technological advances and insights into tackling challenges to promote the deployment of ***,the differences between various conventional liquid electrolyte-dominated Si-based lithium-ion batteries(LIBs)with Si-SSBs are ***,the interfacial mechanical contact model,chemical reaction properties,and charge transfer kinetics(mechanical–chemical kinetics)between Si-based anode and three different SSEs(inorganic(oxides)SSEs,organic–inorganic composite SSEs,and inorganic(sulfides)SSEs)are systemically reviewed,***,the progress for promising inorganic(sulfides)SSE-based Si-SSBs on the aspects of electrode constitution,three-dimensional structured electrodes,and external stack pressure is highlighted,***,future research directions and prospects in the development of Si-SSBs are proposed.

关键词： interfaces Si-based anodes solid-state batteries solid-state electrolytes

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快充、长寿命钠离子电池卤氧化铋纳米片负极材料的高效规模化合成（英文）

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Science China Materials 2024年

作者：周生辉孙哲飞庄子龙文思凡陈浩宇尹泉智潘建海陈星齐徐吉健张桥保 State Key Laboratory of Physical Chemistry of Solid Surfaces College of Materials Xiamen University Department of Mechanical Engineering University of Wisconsin-Madison Department of Chemistry City University of Hong Kong Longmen Laboratory

卤氧化铋（BiOCl）因具有较高的理论比容量和独特的层状结构,是一种有潜力的高性能钠离子电池（SIBs）负极材料.然而,其面临储钠过程中体积膨胀大、储钠机制不明和材料合成方法复杂等诸多挑战,严重制约了其实际应用.基于此,本文提出了...

卤氧化铋（BiOCl）因具有较高的理论比容量和独特的层状结构,是一种有潜力的高性能钠离子电池（SIBs）负极材料.然而,其面临储钠过程中体积膨胀大、储钠机制不明和材料合成方法复杂等诸多挑战,严重制约了其实际应用.基于此,本文提出了一种简便高效的合成策略成功构筑了高性能储钠BiOCl纳米片负极材料.通过深入的原位/非原位显微和谱学表征技术结合电化学分析,我们证实了BiOCl纳米片负极在嵌/脱钠循环后,生成了金属Bi和Na3OCl.所形成的金属Bi在后续的循环过程中作为储钠的活性物质,而形成的Na3OCl有利于增强固体电解质中间相（SEI）的稳定性和促进钠离子的快速传输.此外,形成的金属Bi在循环过程中逐渐转变为纳米多孔结构,进一步提高钠离子的传输效率和缓冲材料的体积膨胀.因此,制备得到的BiOCl纳米片负极展现出了优异的倍率性能和循环稳定性.由预钠循环后的BiOCl纳米片负极与磷酸钒钠（NVP）正极匹配组装的全电池,也表现出了优异的倍率和循环性能.这项工作为开发高性能的钠离子电池负极提供了有价值的见解.

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