The development of shape-customizable and bulk flexible electrochemical devices through processing technologies as versatile as those used for plastics promises to revolutionize the future of battery technology.Howeve...The development of shape-customizable and bulk flexible electrochemical devices through processing technologies as versatile as those used for plastics promises to revolutionize the future of battery technology.However,this pursuit has been fundamentally hindered by the absence of transformative battery materials capable of delivering the necessary electrochemical functions,robust interface adhesion,and,crucially,the suitable rheological properties required for on-demand shaping.In this work,we introduce a concept of a multifunctional plasticine electrode matrix(PEM)featuring nano-interpenetrating networks(nano-IPN)to address this challenge.Utilizing the nonflammable liquid-electrolyte hydration combined with conductive nanomaterials,we have realized a PEM in the form of a multifunctional nanocomposite that integrates ion and electron conduction,component binding,non-flammability,and plasticine-like moldability.With this PEM,we have successfully fabricated a variety of bulk-flexible electrodes with high mass loading of active material(AM)(>70 wt%)using industry-friendly extrusion and compression molding techniques.Moreover,these high AM-loading composite electrodes achieve an unparalleled bulk conformability and flexibility,remaining structurally intact even under severe mechanical stress.Ultimately,we have successfully produced shape-patternable and flexible batteries via extrusion molding.This study underscores the potential of the PEM to revolutionize battery microstructures,interfaces,manufacturing processes,and performance characteristics.展开更多
The development of a durable metallic coating on diverse substrates is both intriguing and challenging,particularly in the research of metal-conductive materials for applications such as batteries,soft electronics,and...The development of a durable metallic coating on diverse substrates is both intriguing and challenging,particularly in the research of metal-conductive materials for applications such as batteries,soft electronics,and beyond.Herein,by learning from the pencil-writing process,a facile solid-ink rubbing technology(SIR-tech)is invented to address the above challenge.The solid-ink is exampled by rational combination of liquid metal and graphite particles.By harnessing the synergistic effects between rubbing and adhesion,controllable metallic skin is successfully formed onto metals,woods,ceramics,and plastics without limitation in size and shape.Moreover,outperforming pure liquid-metal coating,the composite metallic skin by SIR-tech is very robust due to the self-lamination of graphite nanoplate exfoliated by liquid-metal rubbing.The critical factors controlling the structures-properties of the composite metallic skin have been systematically investigated as well.For applications,the SIR-tech is demonstrated to fabricate high-performance composite current collectors for next-generation batteries without traditional metal foils.Meanwhile,advanced skin-electrodes are further demonstrated for stable triboelectricity generation even under temperature fluctuation from-196 to 120℃.This facile and highly-flexible SIR-tech may work as a powerful platform for the studies on functional coatings by liquid metals and beyond.展开更多
The practical application of high-energy lithium–sulfur battery is plagued with two deadly obstacles.One is the“shuttle effect”originated from the sulfur cathode,and the other is the low Coulombic efficiency and se...The practical application of high-energy lithium–sulfur battery is plagued with two deadly obstacles.One is the“shuttle effect”originated from the sulfur cathode,and the other is the low Coulombic efficiency and security issues arising from the lithium metal anode.In addressing these issues,we propose a novel silicon-sulfurized poly(acrylonitrile)full battery.In this lithium metal-free system,the Li source is pre-loaded in the cathode,using a nitrogen evolution reaction(NER)to implant Li+into the silicon/carbon anode.Sulfurized poly(acrylonitrile)based on a solid–solid conversion mechanism can fundamentally circumvent the“shuttle effect”.Meanwhile,the silicon/carbon anode can achieve more efficient utiliza-tion and higher security when compared with the Li metal anode.The full cell used in this technology can deliver a capacity of 1169.3 mAh g^(-1),and it can be stabilized over 100 cycles,implying its excellent elec-trochemical stability.Furthermore,the practical pouch cell with a high sulfur loading of 4.2 mg cm^(-2)can achieve a high specific energy of 513.2 Wh kg-1.The mechanism of the NER in cathode has also been investigated and analyzed by in situ methods.Notably,this battery design completely conforms to the current battery production technology because of the degassing of gasbag,resulting in a low manufactur-ing cost.This work will open the avenue to develop a lithium metal-free battery using the NER.展开更多
基金financial support from the National Natural Science Foundation of China(52473248,52203123,52125301,22279070 and U21A20170)the State Key Laboratory of Polymer Materials Engineering(Grant No:sklpme 2023-1-05 and sklpme 2024-2-04)+3 种基金the Ministry of Science and Technology of China(No.2019YFA0705703)the Sichuan Science and Technology Program(2023NSFSC0991 and 2025ZNSFSC1411)the Fundamental Research Funds for the Central Universitiespartially sponsored by the Double First-Class Construction Funds of Sichuan University.
文摘The development of shape-customizable and bulk flexible electrochemical devices through processing technologies as versatile as those used for plastics promises to revolutionize the future of battery technology.However,this pursuit has been fundamentally hindered by the absence of transformative battery materials capable of delivering the necessary electrochemical functions,robust interface adhesion,and,crucially,the suitable rheological properties required for on-demand shaping.In this work,we introduce a concept of a multifunctional plasticine electrode matrix(PEM)featuring nano-interpenetrating networks(nano-IPN)to address this challenge.Utilizing the nonflammable liquid-electrolyte hydration combined with conductive nanomaterials,we have realized a PEM in the form of a multifunctional nanocomposite that integrates ion and electron conduction,component binding,non-flammability,and plasticine-like moldability.With this PEM,we have successfully fabricated a variety of bulk-flexible electrodes with high mass loading of active material(AM)(>70 wt%)using industry-friendly extrusion and compression molding techniques.Moreover,these high AM-loading composite electrodes achieve an unparalleled bulk conformability and flexibility,remaining structurally intact even under severe mechanical stress.Ultimately,we have successfully produced shape-patternable and flexible batteries via extrusion molding.This study underscores the potential of the PEM to revolutionize battery microstructures,interfaces,manufacturing processes,and performance characteristics.
基金the financial support from the National Natural Science Foundation of China (52125301 and 52203123)the Fundamental Research Funds for the Central Universitiespartially sponsored by the Double First-Class Construction Funds of Sichuan University。
文摘The development of a durable metallic coating on diverse substrates is both intriguing and challenging,particularly in the research of metal-conductive materials for applications such as batteries,soft electronics,and beyond.Herein,by learning from the pencil-writing process,a facile solid-ink rubbing technology(SIR-tech)is invented to address the above challenge.The solid-ink is exampled by rational combination of liquid metal and graphite particles.By harnessing the synergistic effects between rubbing and adhesion,controllable metallic skin is successfully formed onto metals,woods,ceramics,and plastics without limitation in size and shape.Moreover,outperforming pure liquid-metal coating,the composite metallic skin by SIR-tech is very robust due to the self-lamination of graphite nanoplate exfoliated by liquid-metal rubbing.The critical factors controlling the structures-properties of the composite metallic skin have been systematically investigated as well.For applications,the SIR-tech is demonstrated to fabricate high-performance composite current collectors for next-generation batteries without traditional metal foils.Meanwhile,advanced skin-electrodes are further demonstrated for stable triboelectricity generation even under temperature fluctuation from-196 to 120℃.This facile and highly-flexible SIR-tech may work as a powerful platform for the studies on functional coatings by liquid metals and beyond.
基金the National Natural Science Foundation of China(21922508,21673116,21633003,and U1801251)Natural Science Foundation of Jiangsu Province of China(BK20190009)and Key R&D Project funded by Department of Science and Technology of Jiangsu Province(BE2020003)。
文摘The practical application of high-energy lithium–sulfur battery is plagued with two deadly obstacles.One is the“shuttle effect”originated from the sulfur cathode,and the other is the low Coulombic efficiency and security issues arising from the lithium metal anode.In addressing these issues,we propose a novel silicon-sulfurized poly(acrylonitrile)full battery.In this lithium metal-free system,the Li source is pre-loaded in the cathode,using a nitrogen evolution reaction(NER)to implant Li+into the silicon/carbon anode.Sulfurized poly(acrylonitrile)based on a solid–solid conversion mechanism can fundamentally circumvent the“shuttle effect”.Meanwhile,the silicon/carbon anode can achieve more efficient utiliza-tion and higher security when compared with the Li metal anode.The full cell used in this technology can deliver a capacity of 1169.3 mAh g^(-1),and it can be stabilized over 100 cycles,implying its excellent elec-trochemical stability.Furthermore,the practical pouch cell with a high sulfur loading of 4.2 mg cm^(-2)can achieve a high specific energy of 513.2 Wh kg-1.The mechanism of the NER in cathode has also been investigated and analyzed by in situ methods.Notably,this battery design completely conforms to the current battery production technology because of the degassing of gasbag,resulting in a low manufactur-ing cost.This work will open the avenue to develop a lithium metal-free battery using the NER.
