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Carbon Energy 2021年第6期3卷 916-928页

作者： Ke Li Wei Shen Tao Xu Lu Yang Xiaobing Xu Feiyao Yang Lijuan Zhang Yangjian Wang Yaning Zhou Mengjuan Zhong Di Wei Division of G-Device Technology Beijing Graphene InstituteBeijingChina

Replacement of flammable liquid electrolytes with gel polymer electrolytes(GPEs)is a promising route to improve the safety of lithium-ion batteries(LIBs).However,polymer-based electrolytes have limited suitability at low/high temperatures due to the instability of the polymer at high temperatures and the low ionic conductivity of the gel state at low ***,an integrated design of electrodes/fibrous GPEs modified with graphene oxide(GO)is *** to the integrated structure of electrodes/GPEs,the strong interface affinity between electrodes and GPEs ensures that the GPEs spun on electrodes do not shrink at high temperatures(160-180℃),thus preventing a short circuit of ***,after GO modification,oxygen-containing functional groups of GO can accelerate Li^(+)transport of GO-GPEs even at a low temperature of−15℃.When these GPEs are applied to flexible LIBs,the LIBs show excellent electrochemical performance,with satisfactory cycling stability of 82.9%at 1 C after 1000 cycles at 25℃.More importantly,at a high temperature of 160℃,the LIBs can also discharge normally and light the green light-emitting ***,at a low temperature of−15℃,92.7%of its room-temperature capacity can be obtained due to the accelerated Li^(+)transport caused by GO modification,demonstrating the great potential of this electrolyte and integrated structure for practical gel polymer LIB applications.

关键词： flexible battery gel polymer electrolyte graphene oxide safe lithium-ion battery

Paper-based aqueous Al ion battery with water-in-salt electrolyte

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Green Energy & Environment 2023年第5期8卷 1380-1388页

作者： Yifei Wang Wending Pan Kee Wah Leong Yingguang Zhang Xiaolong Zhao Shijing Luo Dennis Y.C.Leung School of Mechanical Engineering and Automation Harbin Institute of TechnologyShenzhen518055China Department of Mechanical Engineering The University of Hong KongHong KongChina

Low-cost,flexible and safe battery technology is the key to the widespread usage of wearable electronics,among which the aqueous Al ion battery with water-in-salt electrolyte is a promising *** this work,a flexible aqueous Al ion battery is developed using cellulose paper as *** water-in-salt electrolyte is stored inside the paper,while the electrodes are either printed or attached on the paper surface,leading to a lightweight and thin-film battery ***,this battery can tolerate a charge and discharge rate as high as 4 A g^(-1) without losing its storage *** charge voltage is around 2.2 V,while the discharge plateau of 1.6–1.8 V is among the highest in reported aqueous Al ion batteries,together with a high discharge specific capacity of~140 mAh g^(-1).However,due to the water electrolysis side reaction,the faradaic efficiency can only reach 85%with a cycle life of 250 due to the dry out of *** from using flexible materials and aqueous electrolyte,this paper-based Al ion battery can tolerate various deformations such as bending,rolling and even puncturing without losing its *** two single cells are connected in series,the battery pack can provide a charge voltage of 4.3 V and a discharge plateau as high as 3–3.6 V,which are very close to commercial Li ion *** a cheap,flexible and safe battery technology may be widely applied in low-cost and large-quantity applications,such as RFID tags,smart packages and wearable biosensors in the future.

关键词： Al ion battery Aqueous electrolyte Water-in-salt Paper battery flexible battery

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Crumpled,high-power,and safe wearable Lithium-Ion battery enabled by nanostructured metallic textiles

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Fundamental Research 2021年第4期1卷 399-407页

作者： Dongrui Wang Jian Chang Qiyao Huang Dongdong Chen Peng Li Yau-Wai Denis Yu Zijian Zheng Laboratory for Advanced Interfacial Materials and Devices Research Centre for Smart Wearable TechnologyInstitute of Textiles and ClothingThe Hong Kong Polytechnic UniversityHong Kong SARChina School of Energy and Environment and Center of Super-Diamond and Advanced Films(COSDAF)City University of Hong KongTat Chee AvenueHong Kong SARChina Research Institute for Smart Energy The Hong Kong Polytechnic UniversityHong Kong SARChina School of Chemistry and Biological Engineering University of Science and Technology BeijingBeijing100083China Academy for Advanced Interdisciplinary Studies Southern University of Science and TechnologyShenzhen 518055China EPRO Advance Technology Limited Yuen LongHong Kong SARChina Institute of Microscale Optoelectronics Shenzhen UniversityShenzhen 518055China

Textile-based flexible Lithium-Ion Batteries(LIBs)show promising mechanical flexibility that is appealing for a wide variety of wearable and flexible electronic *** flexibility of flexible LIBs nowadays is still *** addition,their power performance is too low to enable high-speed charging,due to the low conductivity of the ***,we develop highly electrically conductive metallic fabrics,which are fabricated by coating nanostructured Ni or Cu(nano-reliefs)on woven cotton fabrics,as current collectors to enable crumpled,high-power,and safe wearable *** nanostructured metal coating not only effectively increases the contact area between current collectors and active materials,but also shortens the charge carrier transport paths,so that LIBs constructed on these nanostructured metallic cotton fabrics exhibit a high power density of 439 W/L and superior electrochemical stability under various mechanical deformations including folding,twisting,squeezing,and *** type of nanostructured metallic textile is highly desirable for portable and wearable electronic applications.

关键词： Energy storage Wearable electronics Metallic textile Nanostructure flexible battery

Carbon nanotubes for flexible batteries: recent progress and future perspective

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National Science Review 2021年第5期8卷 158-174页

作者： Sheng Zhu Jian Sheng Yuan Chen Jiangfeng Ni Yan Li Beijing National Laboratory for Molecular Sciences Key Laboratory for the Physics and Chemistry of NanodevicesState Key Laboratory of Rare Earth Materials Chemistry and ApplicationsCollege of Chemistry and Molecular EngineeringPeking University School of Chemical and Biomolecular Engineering The University of Sydney School of Physical Science and Technology Center for Energy Conversion Materials & Physics(CECMP)Jiangsu Key Laboratory of Thin FilmsSoochow University Light Industry Institute of Electrochemical Power Sources

flexible batteries, which maintain their functions potently under various mechanical deformations, attract increasing interest due to potential applications in emerging portable and wearable electronics. Significant efforts have been devoted to material synthesis and structural designs to realize the mechanical flexibility of various batteries. Carbon nanotubes(CNTs) have a unique one-dimensional(1 D) nanostructure and are convenient to further assemble into diverse macroscopic structures, such as 1 D fibers, 2 D films and 3 D sponges/aerogels. Due to their outstanding mechanical and electrical properties, CNTs and CNT-based hybrid materials are superior building blocks for different components in flexible batteries. This review summarizes recent progress on the application of CNTs in developing flexible batteries, from closed-system to open-system batteries, with a focus on different structural designs of CNT-based material systems and their roles in various batteries. We also provide perspectives on the challenges and future research directions for realizing practical applications of CNT-based flexible batteries.

关键词： carbon nanotube flexible battery electrochemical energy storage wearable electronics

Enhancing bifunctionality of CoN nanowires by Mn doping for long-lasting Zn-air batteries

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Science China Chemistry 2020年第7期63卷 890-896页

作者： Yongqi Zhang Bo Ouyang Guankui Long Hua Tan Zhe Wang Zheng Zhang Weibo Gao Rajdeep Singh Rawat Hong Jin Fan School of Physical and Mathematical Sciences Nanyang Technological University21 Nanyang Link637371Singapore Institute of Fundamental and Frontier Sciences University of Electronic Science and Technology of ChinaChengdu 611731China Department of Applied Physics and Institution of Energy and Microstructure Nanjing University of Science and TechnologyNanjing 210094China Institute of Materials Research and Engineering A*STAR(Agency fo r ScienceTechnology and Research)Innovis 138634Singapore Natural Sciences and Science Education National Institute of EducationNanyang Technological UniversitySingapore 637616Singapore

Tailoring the nanostructure and composition of transition metal nitrides is highly important for their use as potent low-cost electrocatalysts. Cobalt nitride(CoN) exhibits strong catalytic activity for oxygen evolution reaction(OER). However, its poor catalytic efficiency for oxygen reduction reaction(ORR) hinders its application in rechargeable zinc-air batteries(ZABs) as the air cathode. In this work, we deploy the effective strategy of Mn doping to improve both OER and ORR activity of CoN nanowires as the cathode material for ZAB. Theoretical calculation predicts that moderate Mn doping in cobalt nitride results in a downshift of the d-band center and reduces the adsorption energy of reaction intermediates. With ~10 at% Mn dopants, stronger catalysis activities for both OER and ORR are achieved compared to pure CoN nanowires. Subsequently, both aqueous and flexible quasi-solid-state ZABs are constructed using the Mn-doped CoN nanowires array as additive-free air cathode. Both types of devices present large open circuit potential, high power density and long-cycle stability. This work pushes forward the progress in developing cost-effective ZABs.

关键词： bifunctional electrocatalyst Zn-air battery oxygen reduction reaction flexible battery plasma processing

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Recent Advances in Printed Thin-Film Batteries

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Engineering 2022年第6期8卷 238-261页

作者： Benoit Clement Miaoqiang Lyu Eeshan Sandeep Kulkarni Tongen Lin Yuxiang Hu Vera Lockett Chris Greig Lianzhou Wang Nanomaterials Centre School of Chemical Engineering and Australian Institute for Bioengineering and NanotechnologyThe University of QueenslandBrisbaneQLD 4072Australia Printed Energy Pty.Ltd. BrisbaneQLD 4001Australia Printed Energy Pty.Ltd. TempeAZ 85284USA Dow Centre for Sustainable Engineering Innovation School of Chemical EngineeringThe University of QueenslandBrisbaneQLD 4072Australia

The rapidly increasing demand for wearable electronic devices has motivated research in low-cost and flexible printed batteries with diverse form factors and *** the past,technological achieve-ments in the field have been emphasized,overlooking the industrial and market ***,different applications require different battery chemistries and formats,that greatly impacts the manu-facturing process and competition *** chemistries and formats should therefore be selected carefully to maximize the chances for commercial *** some of these technologies are starting to be marketed for portable electronics,there is a pressing need to evaluate different printing technologies and compare them in terms of the processing constraints and product requirements of specific electronic *** evaluating the intrinsic strengths and current limitations of printed battery technologies,development pathways can be prioritized,and potential bottlenecks can be overcome to accelerate the path to market.

关键词： Printed battery Electronic device flexible battery Roll-to-roll printing Monolithic integration

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Recent progress of flexible aqueous multivalent ion batteries

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Carbon Energy 2022年第3期4卷 411-445页

作者： Zhenya Wang Yanmei Li Jiawei Wang Runa Ji Hao Yuan Yingyu Wang Hua Wang School of Chemistry Beijing Advanced Innovation Center for Biomedical EngineeringBeihang UniversityBeijingChina School of Materials Science and Engineering University of Science and Technology BeijingBeijingChina School of Chemistry Engineering Northeast Electric Power UniversityJilinChina

flexible aqueous batteries have been thriving with the growing demand for wearable and portable electrical *** particular,flexible aqueous mul tivalent ion batteries(FAMIBs),the charge carriers of which include Zn^(2+),Al^(3+),Mg^(2+),and Ca^(2+),have great potential for development owing to their high safety,high elemental abundance in the Earth's crust,and a multi-electron redox mechanism with a high theoretical specific ***,for a comprehensive understanding of this developing field,it is necessary to summarize the recent research progress of FAMIBs in a timely ***,the advancements of the state-of-the-art FAMIBs are reviewed,and the prospects toward this field are also *** study focuses on the rational material and configuration design for FAMIBs in recent studies to achieve high battery performances under deformation conditions,which is elaborated on by classification of the anode,cathode,hydrogel electrolyte,and configurations of ***,the electrochemical performance of FAMIBs under flexible conditions is also reviewed from the perspective of their working voltage,specific capacity,and cycling ***,the ap proaches to improve the performance of FAMIBs are comprehensively eval uated,followed by the outlook on the challenges and opportunities in future development of FAMIBs.

关键词： aqueous battery flexible battery hydrogel electrolyte multivalent ion zinc ion battery

Electronically coupled layered double hydroxide/MXene quantum dot metallic hybrids for high-performance flexible zinc–air batteries

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InfoMat 2021年第10期3卷 1134-1144页

作者： Xiaotong Han Nannan Li Peixun Xiong Min Gyu Jung Yingbo Kang Qingyun Dou Qing Liu Jin Yong Lee Ho Seok Park School of Chemical Engineering Sungkyunkwan University(SKKU)SuwonRepublic of Korea Department of Chemistry Institute of Basic ScienceSungkyunkwan UniversitySuwonRepublic of Korea Department of Health Sciences and Technology Samsung Advanced Institute for Health Sciences and Technology(SAIHST)Sungkyunkwan UniversitySuwonRepublic of Korea

Precise control of the local electronic structure and properties of electrocatalysts is important for enhancing the multifunctionality and durability of electrocatalysts and for correlating the structure/chemistry with the catalytic ***,we report electronically coupled metallic hybrids of NiFe layered double hydroxide nanosheet/Ti3C2 MXene quantum dots deposited on a nitrogen-doped graphene surface(LDH/MQD/NG)for high-performance flexible Zn-air batteries(ZABs).As verified from the Mott-Schottky and Nyquist plots,as well as spectroscopic,electrochemical,and computational analyses,the electronic and chemical coupling of LDH/MQD/NG modulates the local electronic and surface structure of the active LDH to provide metallic conductivity and abundant active sites,leading to significantly improved bifunctional activity and electrocatalytic *** rechargeable ZABs with LDH/MQD/NG hybrids are superior to the previous LDH-based ZABs,demonstrating a high power density(113.8 mW cm^(-2))and excellent cycle stability(150 h at 5 mA cm^(-2)).Moreover,the corresponding quasi solid-state ZABs are completely flexible and practical,affording a high power density of 57.6 mW cm^(-2)even in the bent state,and in real-life operation of tandem cells for powering various electronic devices.

关键词： 2D quantum dots flexible battery metallic hybrids oxygen electrochemistry Zn-air battery

Pushing the Limit of flexible Batteries

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CCS Chemistry 2023年第3期5卷 531-543页

作者： Chuan Xie Yanpeng Guo Zijian Zheng Department of Applied Biology and Chemical Technology Faculty of ScienceThe Hong Kong Polytechnic UniversityHung HomHong Kong School of Fashion and Textiles The Hong Kong Polytechnic UniversityHung HomHong Kong Research Institute for Intelligent Wearable Systems(RI-IWEAR) The Hong Kong Polytechnic UniversityHung HomHong Kong Research Institute for Smart Energy(RISE) The Hong Kong Polytechnic UniversityHung HomHong Kong

Alongside the rapid development of flexible and wearable electronics,the search for reliable,safe,and high-energy rechargeable flexible batteries(FBs)has become a research hotspot in recent *** there are some prototype FBs exhibited by the industry and a rapidly increasing number of publications reported by academia,most demonstrations are shown on a laboratory scale,and it is still difficult to find real implementation of the technology in the *** perspective aims to discuss and analyze the key metrics,including energy density,flexibility,and safety,that are critical to pushing FBs to a commercially viable level,with a special focus on the lithium batteries and zinc batteries most reported in the *** first compare the figure of merit of FBs(fbFOM)of existing lithium-based and zinc-based FBs with the requirement for market *** then analyze the most desired cell configurations toward high flexibility,followed by systematic discussions on features and materials selection toward high energy density ***,we discuss strategies to enhance battery *** outlook of the future developments needed to address the gaps between the state-of-the-art demonstrations and real applications is provided at the end of this article.

关键词： flexible battery energy density safety lithium battery zinc battery

Deformation-tolerant metal anodes for flexible sodium-air fiber batteries

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eScience 2022年第6期2卷 606-614页

作者： Lei Ye Xiangran Cheng Meng Liao Tiancheng Zhao Xinlin Huang Xinyue Kang Kun Zhang Xuemei Sun Bingjie Wang Huisheng Peng State Key Laboratory of Molecular Engineering of Polymers Department of Macromolecular Scienceand Laboratory of Advanced MaterialsFudan UniversityShanghai 200438PR China

Although flexible sodium-air(Na-air)batteries with high theoretical energy density offer promising opportunities for next-generation smart electronics,enhancing the safety and efficiency of flexible sodium metal anodes under dynamic and continuous deformation remains a ***,a flexible sodiated carbon nanotube layer to suppress dendrite growth under various deformations is demonstrated through a Fermi level-driven spontaneous synthetic *** resulting sodiated carbon nanotube layer,which has a spontaneously formed solid-electrolyte interface and a robust interlocked structure,creates a uniformly distributed electric field and stable interface even under deformation,affording dendrite-free flexible Na metal *** this deformation-tolerant Na metal anode,we have constructed a new family of highly flexible Na-air fiber batteries with excellent cycling performance for 400 cycles at a current density of 1000mA·g^(−1) and a capacity limit of 500 mAh·g^(−1) under dynamic *** Na-air fiber batteries can be further woven into self-powering systems to support flexible electronic devices.

关键词： Sodium metal flexible battery Sodium-air battery Dendrite Carbon nanotube