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Self-healable gels in electrochemical energy storage devices

Nano Research 2024年第4期17卷 3302-3323页

作者： Yang Li PeiPei Ding Yuzhe Gu Sheng Qian Yuncong Pang Lele Wang Jiayang Feng Baoguang Liu Qi Wan Ping Li Zhiwei Liu College of Electronic and Optical Engineering&College of Flexible Electronics(Future Technology) Nanjing University of Posts&Telecommunications(NJUPT)Nanjing 210023China State Key Laboratory of Organic Electronics and Information Displays&Jiangsu Key Laboratory for Biosensors Institute of Advanced Materials(IAM)Nanjing University of Posts and Telecommunications(NJUPT)Nanjing 210023China College of Materials Science&Engineering Beijing University of TechnologyBeijing 100124China Beijing Advanced Innovation Center for Materials Genome Engineering Institute for Advanced Materials and TechnologyUniversity of Science and Technology BeijingBeijing 100083China Pillar of Engineering Product Development Singapore University of Technology and DesignSingapore 487372Singapore School of Energy and Environmental Engineering University of Science and Technology BeijingBeijing 100083China

In the green energy and carbon-neutral technology,electrochemical energy storage devices have received continuously increasing attention recently.However,due to the unavoidable volume expansion/shrinkage of key materials or irreversible mechanical damages during application,the stability of energy storage and delivery as well as the lifetime of these devices are severely shortened,leading to serious performance degradation or even safety issues.Therefore,the utilization of self-healable gels into electrochemical energy storage devices,such as electrodes,binders,and electrolytes,is proven as an effective method to realize long-term stable operation of these devices via the self-repairing of mechanical and electrochemical characteristics.Herein,this review first summarizes the feature and fabrication of different gels,paying special attention to hydrogels,organohydrogels,and ionogels.Then,basic concepts and figure of merit of self-healable gels are analyzed with a detailed discussion at the healing mechanisms,from reversible dynamic bonds to physical molecular diffusion,and to external healing trigger.Then we introduce all the important parts of electrochemical energy storage devices,which could be replaced by healable gels to enhance the durability,including electrodes,binders,and electrolytes.Finally,the critical challenges and future perspectives regarding the future development of healable gels based high-performance electrochemical energy storage devices or electronics are provided.

关键词： self-healable gels healing mechanisms electrodes binders gel electrolytes

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Mechanoadaptive morphing gel electrolyte enables flexible and fast-charging Zn-ion batteries with outstanding dendrite suppression performance

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Nano Research 2022年第3期15卷 2030-2039页

作者： Faqing Cao Baohu Wu Tianyu Li Shengtong Sun Yucong Jiao Peiyi Wu State Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of Chemistry Chemical Engineering and Biotechnology&Center for Advanced Low-dimension MaterialsDonghua UniversityShanghai 201620China Jülich Centre for Neutron Science(JCNS)at Heinz Maier-Leibnitz Zentrum(MLZ)Forschungszentrum Jülich Lichtenbergstr.185748 GarchingGermany Division of Energy Storage Dalian National Laboratory for Clean EnergyDalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023China

The safe,flexible,and environment-friendly Zn-ion batteries have aroused great interests nowadays.Nevertheless,flagrant Zn dendrite uncontrollably grows in liquid electrolytes due to insufficient surface protection,which severely impedes the future applications of Zn-ion batteries especially at high current densities.gel electrolytes are emerging to tackle this issue,yet the required high modulus for inhibiting dendrite growth as well as concurrent poor interfacial contact with roughened Zn electrodes are not easily reconcilable to regulate the fragile Zn/Zn^(2+) interface.Here we demonstrate,such a conflict may be defeated by using a mechanoadaptive cellulose nanofibril-based morphing gel electrolyte(MorphGE),which synergizes bulk compliance for optimizing interfacial contact as well as high modulus for suppressing dendrite formation.Moreover,by anchoring desolvated Zn^(2+) on cellulose nanofibrils,the side reactions which induce dendrite formation are also significantly reduced.As a result,the MorphGE-based symmetrical Zn-ion battery demonstrated outstanding stability for more than 100 h at the high current density of 10 mA·cm^(−2) and areal capacity of 10 mA·h·cm^(−2),and the corresponding Zn-ion battery delivered a prominent specific capacity of 100 mA·h·g^(−1) for more than 500 cycles at 20 C.The present example of engineering the mechanoadaptivity of gel electrolytes will shed light on a new pathway for designing highly safe and flexible energy storage devices.

关键词： Zn-ion batteries dendrite growth interfacial adaptivity gel electrolytes fast-charging

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In situ preparation of gel polymer electrolyte for lithium batteries: Progress and perspectives

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InfoMat 2022年第2期4卷 110-125页

作者： Chao Ma Wenfeng Cui Xizheng Liu Yi Ding Yonggang Wang Tianjin Key Laboratory of Advanced Functional Porous Materials Institute for New Energy Materials and Low-Carbon TechnologiesSchool of Materials Science and EngineeringTianjin University of TechnologyTianjinChina Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials Institute of New EnergyiChEM(Collaborative Innovation Center of Chemistry for Energy Materials)Fudan UniversityShanghaiChina

The practical applications of Li-ion batteries(LIBs)are challenged by their safety concerns when using liquid electrolytes(LEs).Solid-state gel polymer electrolytes(GPEs)can address this challenge and have drawn increased attention recently.Normally,GPEs are prepared separately and then assembled into cells,which undoubtedly result in dissatisfactory solid/solid interfacial compatibility and low ionic conductivity.Fortunately,in situ GPEs are proposed to address the above challenges and simplify the preparation process.Typically,LE precursor is injected into the cells and gradually transformed into a quasisolid gel state under the conditions of thermal or chemical initiators.Consequently,the obtained in situ GPEs could fully infiltrate the electrode and better interface contact of gel electrolyte/electrode is thus inherited.In this review,the authors focus on the in situ GPEs used in lithium batteries(LBs),and summarize recent progress of the design,synthesis,and applications of in situ GPEs.Based on the different ways of triggering polymerization,there are mainly three methods:thermochemical gelation,polymerization by additional chemical initiators,and cross-linking initiated by Li O bond.Composite GPEs based on in situ solidification method are introduced as a promising strategy to improve the electrochemical performances.Finally,up-to-date research progresses are discussed,and perspectives are provided on the development and challenges of in situ GPEs to meet the requirements for their practical applications in LBs.

关键词： cross-linking gel electrolytes in situ preparation Li-metal batteries polymerization

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An integrated approach to improve the performance of lean–electrolyte lithium–sulfur batteries

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Journal of Energy Chemistry 2022年第4期31卷 585-592页

作者： Hualin Ye Jianguo Sun Yun Zhao Jim Yang Lee Department of Chemical and Biomolecular Engineering National University of Singapore119260Singapore Department of Mechanical Engineering National University of Singapore117575Singapore

While the sulfur conversion reaction kinetics in Li–S batteries is nowadays improved by the use of appropriate electrocatalysts,it remains a challenge for the batteries to perform well under the lean electrolyte condition where polysulfide shuttle,electrode passivation and the loss of electrolyte due to side reactions,are aggravated.These challenges are addressed in this study by the tandem use of a polysulfide conversion catalyst and a redox–targeting mediator in a gel sulfur cathode.Specifically,the gel cathode reduces the polysulfide mobility and hence the polysulfide shuttle and the passivation of the lithium anode by the crossover polysulfides.The redox mediator restrains the deposition of inactive sulfur species in the cathode thereby enabling the Fe–N and Co–N co–doped carbon catalyst to prolong its catalytic activity.Consequently,the integrated catalytic system is able to increase the discharge capacity of high–loading (6.8 mg cm^(-2)) lean–electrolyte (4.0μL mg^(-1)) Li–S batteries from~630 to~1316 m Ah g^(-1),concurrently with an improvement of the cycle life (600 cycles with 46%capacity retention at 1.0 m A cm^(-2)).Redox mediator assisted catalysis in a gel cathode is therefore an effective strategy to extend the application of the sulfur conversion catalyst in lean electrolyte Li–S batteries.

关键词： Redox mediators gel electrolytes Polysulfide catalysis Lean electrolyte Lithium–sulfur batteries

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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 sources.Alkaline 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 performance.However,the conventional alkaline Zn-based battery systems face many challenges associated with electrodes and electrolytes,causing low capacity,poor cycle life,and inferior mechanical performance.Recent advances in materials and structure design have enabled the revisitation of the alkaline Zn-based battery technology for applications in flexible electronics.Herein,we summarize the up-to-date works in flexible alkaline Zn-based batteries and analyze the strategies employed to improve battery performance.Firstly,we introduce the three most reported cathode materials(including Ag-based,Ni-based,and Co-based materials)for flexible alkaline Zn-based batteries.Then,challenges and modifications in battery anodes are investigated.Thirdly,the recently advanced gel electrolytes are introduced from their properties,functions as well as advanced fabrications.Finally,recent works and the advantages of sandwich-type,fiber-type and thin film-type flexible batteries are summarized and compared.This 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

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环丁砜凝胶化界面工程助力安全耐用的宽温域Li/LiCoO_(2)电池

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Science China Materials 2022年第11期65卷 2967-2974页

作者：虞鑫润胡先罗 State Key Laboratory of Materials Processing and Die&Mould Technology School of Materials Science and EngineeringHuazhong University of Science and TechnologyWuhan 430074China

高能量密度锂金属电池在电化学储能领域受到了广泛关注,但其存在热失控的风险.尤其在高温或热滥用等恶劣条件下,安全隐患更加凸显.研发本征热稳定、高安全电解质是该领域的一个主要挑战.在该工作中,我们提出了一种简单易操作的凝胶化策... 详细信息

高能量密度锂金属电池在电化学储能领域受到了广泛关注,但其存在热失控的风险.尤其在高温或热滥用等恶劣条件下,安全隐患更加凸显.研发本征热稳定、高安全电解质是该领域的一个主要挑战.在该工作中,我们提出了一种简单易操作的凝胶化策略,制备出独特的、高热稳定的环丁砜基凝胶电解质.采用耐高温环丁砜作为增塑剂,通过强偶极-偶极相互作用,实现了聚偏氟乙烯/聚环氧乙烷基质之间的凝胶化,并系统地研究了砜基凝胶对凝胶化过程、锂沉积/剥离和固态电解质界面的影响.由于良好的界面特性,砜基凝胶电解质显著提高了锂金属电池的长循环和安全性能.由凝胶电解质组装的Li/LiCoO_(2)电池,在高温(高达90℃)条件下仍然呈现出优异的循环稳定性.此外,通过加速量热仪证实了Li/LiCoO_(2)软包电池的高热安全性(>190℃).该研究工作为开发耐滥用、高比能和长寿命的高安全性锂金属电池提供了新方法.

关键词： lithium-metal batteries gel electrolytes solid electrolyte interphases thermal safety accelerating rate calorimetry

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The Feasible Design of Quasi-Solid-State Aqueous Tin-Iodine Batteries

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Renewables 2023年第4期1卷 474-483页

作者： Qiang Guo Ya’nan Yang Liru Wang Nan Chen Liangti Qu Key Laboratory of Cluster Science Ministry of Education of ChinaKey Laboratory of Photoelectronic/Electrophotonic Conversion MaterialsSchool of Chemistry and Chemical EngineeringBeijing Institute of TechnologyBeijing 100081 Yangtze Delta Region Academy of Beijing Institute of Technology Jiaxing 314019 Key Laboratory of Organic Optoelectronics&Molecular Engineering Ministry of EducationDepartment of ChemistryTsinghua UniversityBeijing 100084

Aqueous rechargeable batteries with high safety have been considered as the main energy source to power portable and wearable electronics.Herein,we report the first construction of quasi-solid-state aqueous tin-iodine batteries by exploiting Sn foil as anode,carbon cloth as cathode,and gel electrolytes.The anode reversibly converts from K_(2)Sn(OH)_(6) to metal Sn,thus eliminating the formation of metal dendrites.Meanwhile,gel electrolytes alleviate anode corrosion and enhance the utilization of the anode.Therefore,the asfabricated quasi-solid-state batteries manifest an areal capacity of 700μAh cm^(-2)(211 mAh g^(-1) equal to theoretical capacity)and excellent cycling stability without obvious capacity degradation after 120 cycles at 1mA cm^(-2).Remarkably,the designed batteries sealed by different package materials including plastic,glass,wood,and cardboard operated steadily,thereby enlarging the application scenario for these batteries.This work enriches the family of aqueous rechargeable batteries and sheds light on the construction of high-performance quasi-solid-state aqueous batteries.

关键词： quasi-solid-state tin-iodine batteries gel electrolytes excellent cycling stability different package materials

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PBA/PVDF锂离子电池凝胶电解质的制备及电性能研究

PBA/PVDF锂离子电池凝胶电解质的制备及电性能研究

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2014年全国高分子材料科学与工程研讨会

作者：刘亚谢海安熊传溪武汉理工大学材料科学与工程学院武汉纺织大学材料科学与工程学院

凝胶聚合物电解质由于不含有可流动的电解液,不会造成电池内的短路,并且具有良好的柔性,可以制成任意形状的电池而受到广泛的关注。凝胶聚合物电解质不仅可以应用在锂离子电池领域,而且可以应用在超级电容器等其他电化学装置中,具有十... 详细信息

凝胶聚合物电解质由于不含有可流动的电解液,不会造成电池内的短路,并且具有良好的柔性,可以制成任意形状的电池而受到广泛的关注。凝胶聚合物电解质不仅可以应用在锂离子电池领域,而且可以应用在超级电容器等其他电化学装置中,具有十分广泛的应用前景。关于聚丙烯酸正丁酯(PBA)作为凝胶电解质的研究目前在国内还处于空白。本研究采用不同摩尔比的丙烯酸正丁酯(BA)和聚偏氟乙烯(PVDF)进行共聚交联制备可用

关键词： PBA-co-PVDF gel electrolytes electrochemical performance

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