Energy & Environmental Materials最新文献

ZnO-Embedded Expanded Graphite Composite Anodes with Controlled Charge Storage Mechanism Enabling Operation of Lithium-Ion Batteries at Ultra-Low Temperatures 具有控制电荷存储机制的ZnO -嵌入膨胀石墨复合阳极使锂离子电池在超低温下工作

IF 15 2区材料科学

Energy & Environmental Materials Pub Date : 2023-07-12 DOI: 10.1002/eem2.12662

Kun Ryu, Michael J. Lee, Kyungbin Lee, Seung Woo Lee

{"title":"ZnO-Embedded Expanded Graphite Composite Anodes with Controlled Charge Storage Mechanism Enabling Operation of Lithium-Ion Batteries at Ultra-Low Temperatures","authors":"Kun Ryu, Michael J. Lee, Kyungbin Lee, Seung Woo Lee","doi":"10.1002/eem2.12662","DOIUrl":"10.1002/eem2.12662","url":null,"abstract":"As lithium (Li)-ion batteries expand their applications, operating over a wide temperature range becomes increasingly important. However, the low-temperature performance of conventional graphite anodes is severely hampered by the poor diffusion kinetics of Li ions (Li+). Here, zinc oxide (ZnO) nanoparticles are incorporated into the expanded graphite to improve Li+ diffusion kinetics, resulting in a significant improvement in low-temperature performance. The ZnO–embedded expanded graphite anodes are investigated with different amounts of ZnO to establish the structure-charge storage mechanism-performance relationship with a focus on low-temperature applications. Electrochemical analysis reveals that the ZnO–embedded expanded graphite anode with nano-sized ZnO maintains a large portion of the diffusion-controlled charge storage mechanism at an ultra-low temperature of −50 °C. Due to this significantly enhanced Li+ diffusion rate, a full cell with the ZnO–embedded expanded graphite anode and a LiNi0.88Co0.09Al0.03O2 cathode delivers high capacities of 176 mAh g−1 at 20 °C and 86 mAh g−1 at −50 °C at a high rate of 1 C. The outstanding low-temperature performance of the composite anode by improving the Li+ diffusion kinetics provides important scientific insights into the fundamental design principles of anodes for low-temperature Li-ion battery operation.","PeriodicalId":11554,"journal":{"name":"Energy & Environmental Materials","volume":"6 4","pages":""},"PeriodicalIF":15.0,"publicationDate":"2023-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/eem2.12662","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46081849","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Preparing 3D Perovskite Li0.33La0.557TiO3 Nanotubes Framework Via Facile Coaxial Electro-Spinning Towards Reinforced Solid Polymer Electrolyte 基于增强固体聚合物电解质的同轴电纺制备三维钙钛矿Li0.33La0.557TiO3纳米管骨架

IF 15 2区材料科学

Energy & Environmental Materials Pub Date : 2023-06-06 DOI: 10.1002/eem2.12636

Yichun Zhao, Lin Fan, Biao Xiao, Shaojun Cai, Jingchao Chai, Xueqing Liu, Jiyan Liu, Zhihong Liu

{"title":"Preparing 3D Perovskite Li0.33La0.557TiO3 Nanotubes Framework Via Facile Coaxial Electro-Spinning Towards Reinforced Solid Polymer Electrolyte","authors":"Yichun Zhao, Lin Fan, Biao Xiao, Shaojun Cai, Jingchao Chai, Xueqing Liu, Jiyan Liu, Zhihong Liu","doi":"10.1002/eem2.12636","DOIUrl":"10.1002/eem2.12636","url":null,"abstract":"It is of significance to construct continuous multiphase percolation channels with fast lithium-ion pathway in hybrid solid electrolytes. 3D ceramic nanostructure frameworks have attracted great attention in this field. Herein, the three-dimensional perovskite Li0.33La0.557TiO3 nanotubes framework (3D-LLTO-NT) is fabricated via a facile coaxial electro-spinning process followed by a calcination process at 800 °C. The hybrid polymer electrolyte of 3D-LLTO-NT framework and poly (ethylene carbonate) (3D-LLTO-NT@PEC) shows improved ionic conductivity of 1.73 × 10−4 S cm−1 at ambient temperature, higher lithium-ion transference number (tLi+) of 0.78 and electrochemical stability window up to 5.0 V vs Li/Li+. The all-solid-state cell of LiFePO4/3D-LLTO-NT@PEC/Li delivers a high specific capacity of 140.2 mAh g−1 at 0.1 C at ambient temperature. This outstanding performance is attributed to the 3D ceramic nanotubes frameworks which provide fast lithium ion transfer pathway and stable interfaces.","PeriodicalId":11554,"journal":{"name":"Energy & Environmental Materials","volume":"6 4","pages":""},"PeriodicalIF":15.0,"publicationDate":"2023-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/eem2.12636","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41643526","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Growing Intact Membrane by Tuning Carbon Down to Ultrasmall 0.37 nm Microporous Structure for Confining Dissolution of Polysulfides Toward High-Performance Sodium–Sulfur Batteries 通过将碳调整到0.37 nm的超小微孔结构来生长完整膜，以限制高性能钠硫电池中多硫化物的溶解

IF 15 2区材料科学

Energy & Environmental Materials Pub Date : 2023-05-30 DOI: 10.1002/eem2.12634

Chao Wu, Juan Li, Lifei Liu, Heng Zhang, Zhuo Zou, Wei Sun, Fangyin Dai, Changming Li

{"title":"Growing Intact Membrane by Tuning Carbon Down to Ultrasmall 0.37 nm Microporous Structure for Confining Dissolution of Polysulfides Toward High-Performance Sodium–Sulfur Batteries","authors":"Chao Wu, Juan Li, Lifei Liu, Heng Zhang, Zhuo Zou, Wei Sun, Fangyin Dai, Changming Li","doi":"10.1002/eem2.12634","DOIUrl":"10.1002/eem2.12634","url":null,"abstract":"Room temperature sodium–sulfur (Na–S) batteries are severely hampered by dissolution of polysulfides into electrolytes. Herein, a facile approach is used to tune a biomass-derived carbon down to an ultrasmall 0.37 nm microporous structure for the first time as a cathode in sodium–sulfur batteries. This produced an intact uniform Na2S membrane to greatly confine the dissolution of polysulfides while realizing a direct solid phase conversion for complete reduction of sulfur to Na2S, which delivers a sulfur loading of 1 mg cm−2 (50 wt.%), an excellent rate capacity (933 mAh g−1 @ 0.1 A g−1 and 410 mAh g−1 @ 2 A g−1), long cycle performance (0.036% per cycle decay at 1 A g−1 after 1500 cycles), and a high energy density for 373 Wh kg−1 (0.1 A g−1) based on whole electrode weight (active sulfur loading + carbon), ranking the best among all reported plain carbon cathode-based room temperature sodium–sulfur batteries in terms of the cycle life and rate capacity. It is proposed that the solid Na2S produced in the ultrasmall pores (0.37 nm) can be squeezed out to grow an intact membrane on the electrode surface covering the outlet of the pores and greatly depressing the dissolution effect of polysulfides for the long cycle life. This work provides a green chemistry to recycle wastes for sustainable energies and sheds light on design of a unique pore structure to effectively block the dissolution of polysulfides for high-performance sodium–sulfur batteries.","PeriodicalId":11554,"journal":{"name":"Energy & Environmental Materials","volume":"6 4","pages":""},"PeriodicalIF":15.0,"publicationDate":"2023-05-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/eem2.12634","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47159523","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Structure-guided Capacitance Relationships in Oxidized Graphene Porous Materials Based Supercapacitors 基于氧化石墨烯多孔材料的超级电容器中的结构引导电容关系

IF 15 2区材料科学

Energy & Environmental Materials Pub Date : 2023-05-17 DOI: 10.1002/eem2.12637

Srinivas Gadipelli, Hanieh Akbari, Juntao Li, Christopher A. Howard, Hong Zhang, Paul R. Shearing, Dan J. L. Brett

{"title":"Structure-guided Capacitance Relationships in Oxidized Graphene Porous Materials Based Supercapacitors","authors":"Srinivas Gadipelli, Hanieh Akbari, Juntao Li, Christopher A. Howard, Hong Zhang, Paul R. Shearing, Dan J. L. Brett","doi":"10.1002/eem2.12637","DOIUrl":"10.1002/eem2.12637","url":null,"abstract":"Supercapacitors formed from porous carbon and graphene-oxide (GO) materials are usually dominated by either electric double-layer capacitance, pseudo-capacitance, or both. Due to these combined features, reduced GO materials have been shown to offer superior capacitance over typical nanoporous carbon materials; however, there is a significant variation in reported values, ranging between 25 and 350 F g−1. This undermines the structure (e.g., oxygen functionality and/or surface area)-performance relationships for optimization of cost and scalable factors. This work demonstrates important structure-controlled charge storage relationships. For this, a series of exfoliated graphene (EG) derivatives are produced via thermal-shock exfoliation of GO precursors and following controlled graphitization of EG (GEG) generates materials with varied amounts of porosity, redox-active oxygen groups and graphitic components. Experimental results show significantly varied capacitance values between 30 and 250 F g−1 at 1.0 A g−1 in GEG structures; this suggests that for a given specific surface area the redox-active and hydrophilic oxygen content can boost the capacitance to 250–300% higher compared to typical mesoporous carbon materials. GEGs with identical oxygen functionality show a surface area governed capacitance. This allows to establish direct structure-performance relationships between 1) redox-active oxygen functional concentration and capacitance and 2) surface area and capacitance.","PeriodicalId":11554,"journal":{"name":"Energy & Environmental Materials","volume":"6 4","pages":""},"PeriodicalIF":15.0,"publicationDate":"2023-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/eem2.12637","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44233152","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Optimization Strategies Toward Functional Sodium-Ion Batteries 功能化钠离子电池的优化策略

IF 15 2区材料科学

Energy & Environmental Materials Pub Date : 2023-05-08 DOI: 10.1002/eem2.12633

Jingwei Chen, Gupta Adit, Lun Li, Yingxin Zhang, Daniel H. C. Chua, Pooi See Lee

{"title":"Optimization Strategies Toward Functional Sodium-Ion Batteries","authors":"Jingwei Chen, Gupta Adit, Lun Li, Yingxin Zhang, Daniel H. C. Chua, Pooi See Lee","doi":"10.1002/eem2.12633","DOIUrl":"10.1002/eem2.12633","url":null,"abstract":"Exploration of alternative energy storage systems has been more than necessary in view of the supply risks haunting lithium-ion batteries. Among various alternative electrochemical energy storage devices, sodium-ion battery outstands with advantages of cost-effectiveness and comparable energy density with lithium-ion batteries. Thanks to the similar electrochemical mechanism, the research and development of lithium-ion batteries have forged a solid foundation for sodium-ion battery explorations. Advancements in sodium-ion batteries have been witnessed in terms of superior electrochemical performance and broader application scenarios. Here, the strategies adopted to optimize the battery components (cathode, anode, electrolyte, separator, binder, current collector, etc.) and the cost, safety, and commercialization issues in sodium-ion batteries are summarized and discussed. Based on these optimization strategies, assembly of functional (flexible, stretchable, self-healable, and self-chargeable) and integrated sodium-ion batteries (−actuators, −sensors, electrochromic, etc.) have been realized. Despite these achievements, challenges including energy density, scalability, trade-off between energy density and functionality, cost, etc. are to be addressed for sodium-ion battery commercialization. This review aims at providing an overview of the up-to-date achievements in sodium-ion batteries and serves to inspire more efforts in designing upgraded sodium-ion batteries.","PeriodicalId":11554,"journal":{"name":"Energy & Environmental Materials","volume":"6 4","pages":""},"PeriodicalIF":15.0,"publicationDate":"2023-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/eem2.12633","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41768103","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 7

Understanding Pseudocapacitance Mechanisms by Synchrotron X-ray Analytical Techniques 用同步加速器X射线分析技术理解伪电容机制

IF 15 2区材料科学

Energy & Environmental Materials Pub Date : 2023-03-22 DOI: 10.1002/eem2.12619

Pei Tang, Wuyang Tan, Guangyang Deng, Yunting Zhang, Shan Xu, Qijun Wang, Guosheng Li, Jian Zhu, Qingyun Dou, Xingbin Yan

{"title":"Understanding Pseudocapacitance Mechanisms by Synchrotron X-ray Analytical Techniques","authors":"Pei Tang, Wuyang Tan, Guangyang Deng, Yunting Zhang, Shan Xu, Qijun Wang, Guosheng Li, Jian Zhu, Qingyun Dou, Xingbin Yan","doi":"10.1002/eem2.12619","DOIUrl":"10.1002/eem2.12619","url":null,"abstract":"Pseudocapacitive materials that store charges via reversible surface or near-surface faradaic reactions are capable of overcoming the capacity limitations of electrical double-layer capacitors. Revealing the structure–activity relationship between the microstructural features of pseudocapacitive materials and their electrochemical performance on the atomic scale is the key to build high-performance capacitor-type devices containing ideal pseudocapacitance effect. Currently, the high brightness (flux), and spectral and coherent nature of synchrotron X-ray analytical techniques make it a powerful tool for probing the structure–property relationship of pseudocapacitive materials. Herein, we report a comprehensive and systematic review of four typical characterization techniques (synchrotron X-ray diffraction, pair distribution function [PDF] analysis, soft X-ray absorption spectroscopy, and hard X-ray absorption spectroscopy) for the study of pseudocapacitance mechanisms. In addition, we offered significant insights for understanding and identifying pseudocapacitance mechanisms (surface redox pseudocapacitance, intercalation pseudocapacitance, and the extrinsic pseudocapacitance phenomenon in battery materials) by combining in situ hard XAS and electrochemical analyses. Finally, a perspective for further depth of understanding into the pseudocapacitance mechanism using synchrotron X-ray analytical techniques is proposed.","PeriodicalId":11554,"journal":{"name":"Energy & Environmental Materials","volume":"6 4","pages":""},"PeriodicalIF":15.0,"publicationDate":"2023-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/eem2.12619","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49512177","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Coupling Ternary Selenide SnSb2Se4 with Graphene Nanosheets for High-Performance Potassium-Ion Batteries 三元硒化SnSb2Se4与石墨烯纳米片偶联用于高性能钾离子电池

IF 15 2区材料科学

Energy & Environmental Materials Pub Date : 2023-03-16 DOI: 10.1002/eem2.12617

Ruiqi Tian, Liping Duan, Yifan Xu, Yuehua Man, Jianlu Sun, Jianchun Bao, Xiaosi Zhou

{"title":"Coupling Ternary Selenide SnSb2Se4 with Graphene Nanosheets for High-Performance Potassium-Ion Batteries","authors":"Ruiqi Tian, Liping Duan, Yifan Xu, Yuehua Man, Jianlu Sun, Jianchun Bao, Xiaosi Zhou","doi":"10.1002/eem2.12617","DOIUrl":"10.1002/eem2.12617","url":null,"abstract":"Although chalcogenide anodes possess higher potassium storage capacity than intercalated-based graphite, their drastic volume change and the irreversible electrochemical reactions still hinder the effective electron/ion transfer during the potassiation/depotassiation process. To solve the above problems, this article proposes the synthesis of a lamellar nanostructure where graphene nanosheets are embedded with SnSb2Se4 nanoparticles (SnSb2Se4/GNS). In the product, fine monodisperse SnSb2Se4 nanoparticles are coupled with graphene nanosheets to form a porous network framework, which can effectively mitigate the drastic volume changes during electrode reactions and guarantee efficient potassium-ion storage through the synergistic interactions among multiple elements. Various electrochemical analyses prove that SnSb2Se4 inherits the advantages of the binary Sb2Se3 and SnSe while avoiding their disadvantages, confirming the synergistic effect of the ternary–chalcogenide system. When tested for potassium storage, the obtained composite delivers a high specific capacity of 368.5 mAh g−1 at 100 mA g−1 and a stable cycle performance of 265.8 mAh g−1 at 500 mA g−1 over 500 cycles. Additionally, the potassium iron hexacyanoferrate cathode and the SnSb2Se4/GNS anode are paired to fabricate the potassium-ion full cell, which shows excellent cyclic stability. In conclusion, this strategy employs atomic doping and interface interaction, which provides new insights for the design of high-rate electrode materials.","PeriodicalId":11554,"journal":{"name":"Energy & Environmental Materials","volume":"6 4","pages":""},"PeriodicalIF":15.0,"publicationDate":"2023-03-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/eem2.12617","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43010357","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

Anode Interfacial Issues in Solid-State Li Batteries: Mechanistic Understanding and Mitigating Strategies 固态锂电池的阳极界面问题:机理理解和缓解策略

IF 15 2区材料科学

Energy & Environmental Materials Pub Date : 2023-03-07 DOI: 10.1002/eem2.12613

Jiacheng Wang, Liquan Chen, Hong Li, Fan Wu

{"title":"Anode Interfacial Issues in Solid-State Li Batteries: Mechanistic Understanding and Mitigating Strategies","authors":"Jiacheng Wang, Liquan Chen, Hong Li, Fan Wu","doi":"10.1002/eem2.12613","DOIUrl":"10.1002/eem2.12613","url":null,"abstract":"All-solid-state Li metal batteries (ASSLBs) using inorganic solid electrolyte (SE) are considered promising alternatives to conventional Li-ion batteries, offering improved safety and boosted energy density. While significant progress has been made on improving the ionic conductivity of SEs, the degradation and instability of Li metal/inorganic SE interfaces have become the critical challenges that limit the coulombic efficiency, power performance, and cycling stability of ASSLBs. Understanding the mechanisms of complex/dynamic interfacial phenomena is of great importance in addressing these issues. Herein, recent studies on identifying, understanding, and solving interfacial issues on anode side in ASSLBs are comprehensively reviewed. Typical issues at Li metal/SE interface include Li dendrite growth/propagation, SE cracking, physical contact loss, and electrochemical reactions, which lead to high interfacial resistance and cell failure. The causes of these issues relating to the chemical, physical, and mechanical properties of Li metal and SEs are systematically discussed. Furthermore, effective mitigating strategies are summarized and their effects on suppressing interfacial reactions, improving interfacial Li-ion transport, maintaining interfacial contact, and stabilizing Li plating/stripping are highlighted. The in-depth mechanistic understanding of interfacial issues and complete investigations on current solutions provide foundations and guidance for future research and development to realize practical application of high-performance ASSLB.","PeriodicalId":11554,"journal":{"name":"Energy & Environmental Materials","volume":"6 4","pages":""},"PeriodicalIF":15.0,"publicationDate":"2023-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/eem2.12613","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47255402","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 11

In Situ Reaction Fabrication of a Mixed-Ion/Electron-Conducting Skeleton Toward Stable Lithium Metal Anodes 原位反应制备用于稳定锂金属阳极的离子/电子混合导电骨架

IF 15 2区材料科学

Energy & Environmental Materials Pub Date : 2023-03-07 DOI: 10.1002/eem2.12614

Juhong He, Liufeng Ai, Tengyu Yao, Zhenming Xu, Duo Chen, Xiaogang Zhang, Laifa Shen

{"title":"In Situ Reaction Fabrication of a Mixed-Ion/Electron-Conducting Skeleton Toward Stable Lithium Metal Anodes","authors":"Juhong He, Liufeng Ai, Tengyu Yao, Zhenming Xu, Duo Chen, Xiaogang Zhang, Laifa Shen","doi":"10.1002/eem2.12614","DOIUrl":"10.1002/eem2.12614","url":null,"abstract":"Lithium metal batteries are emerging as a strong candidate in the future energy storage market due to its extremely high energy density. However, the uncontrollable lithium dendrites and volume change of lithium metal anodes severely hinder its application. In this work, the porous Cu skeleton modified with Cu6Sn5 layer is prepared via dealloying brass foil following a facile electroless process. The porous Cu skeleton with large specific surface area and high electronic conductivity effectively reduces the local current density. The Cu6Sn5 can react with lithium during the discharge process to form lithiophilic Li7Sn2 in situ to promote Li-ions transport and reduce the nucleation energy barrier of lithium to guide the uniform lithium deposition. Therefore, more than 300 cycles at 1 mA cm−2 are achieved in the half-cell with an average Coulombic efficiency of 97.5%. The symmetric cell shows a superior cycle life of more than 1000 h at 1 mA cm−2 with a small average hysteresis voltage of 16 mV. When coupled with LiFePO4 cathode, the full cell also maintains excellent cycling and rate performance.","PeriodicalId":11554,"journal":{"name":"Energy & Environmental Materials","volume":"6 4","pages":""},"PeriodicalIF":15.0,"publicationDate":"2023-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/eem2.12614","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47918771","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A Hydrogen Iron Flow Battery with High Current Density and Long Cyclability Enabled Through Circular Water Management 通过循环水管理实现高电流密度和长循环性的氢铁液流电池

IF 15 2区材料科学

Energy & Environmental Materials Pub Date : 2023-02-20 DOI: 10.1002/eem2.12605

Litao Yan, Yuyan Shao, Wei Wang

{"title":"A Hydrogen Iron Flow Battery with High Current Density and Long Cyclability Enabled Through Circular Water Management","authors":"Litao Yan, Yuyan Shao, Wei Wang","doi":"10.1002/eem2.12605","DOIUrl":"10.1002/eem2.12605","url":null,"abstract":"The hydrogen-iron (HyFe) flow cell has great potential for long-duration energy storage by capitalizing on the advantages of both electrolyzers and flow batteries. However, its operation at high current density (high power) and over continuous cycling testing has yet to be demonstrated. In this article, we discuss our design and demonstration of a water-management strategy that supports high current and long-cycling performance of a HyFe flow cell. Water molecules associated with the movement of protons from the iron electrode to the hydrogen electrode are sufficient to hydrate the membrane and electrode at a low current density of 100 mA cm−2 during the charge process. At higher charge current density, more aggressive measures must be taken to counter back-diffusion driven by the acid concentration gradient between the iron and hydrogen electrodes. Our water-management approach is based on water vapor feeding in the hydrogen electrode and water evaporation in the iron electrode, thus enabling high current density operation of 300 mA cm−2.","PeriodicalId":11554,"journal":{"name":"Energy & Environmental Materials","volume":"6 4","pages":""},"PeriodicalIF":15.0,"publicationDate":"2023-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/eem2.12605","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45672559","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1