Stretchable triboelectric nanogenerators(TENGs)have garnered significant attention as wearable power sources by enabling the realization of self-powered systems through integration with other wearable platforms.Howeve...Stretchable triboelectric nanogenerators(TENGs)have garnered significant attention as wearable power sources by enabling the realization of self-powered systems through integration with other wearable platforms.However,achieving intrinsically stretchable TENGs with stable performance under deformation remains a major challenge,particularly in forming robust dielectric/electrode interfaces and fabricating fully stretchable materials.Here,we propose the intrinsically stretchable ionogel-based TENGs(S-iTENG)with a monolithic structure by directly coating silver nanowires(AgNWs)onto free-standing ionogel.The ionogel serves as the substrate,charge-generating,and trapping layer,simplifying device configuration.Its hydrophilic characteristics improve the wettability of AgNWs and their interfacial adhesion.The optimized S-iTENG exhibits a power density of~109.8 mW·m^(-2),excellent stretchability(~195%),and stable operation even under 80%strain.The practical feasibility of the S-iTENG is demonstrated in self-powered sensory platforms.Overall,these results highlight the significance of monolithic,substrate-free S-iTENG as wearable energy harvesters and key components for future wearable electronics.展开更多
As demand for customized wearable electronics grows,free-form Li-ion batteries(LIBs)are attracting significant attention.Although substantial advancements have been made in printed LIBs for shape-versatile electronics...As demand for customized wearable electronics grows,free-form Li-ion batteries(LIBs)are attracting significant attention.Although substantial advancements have been made in printed LIBs for shape-versatile electronics,the development of printable solid-state electrolytes remains challenging due to the difficulty of simultaneously achieving desirable rheological properties and ionic conductivity.In this study,a solvent-free,non-flammable solid polymer electrolyte(SPE)is designed as a novel three-dimensional(3D)printable electrolyte via direct ink writing(DIW)for all-solid-state batteries(ASSBs).The solvent-free nature of this SPE eliminates post-annealing steps,enhancing safety by mitigating risks of leakage,short-circuiting,and fire.Additionally,precise control over polymer molecular weight and electrolyte composition enables high printing resolution(-100μm),high ionic conductivity(0.705 mS cm^(-1) at 25℃),and intrinsic non-flammability.A 3D-printed ASSB,featuring a LiFePO_(4) cathode and Li_(4)Ti_(5)O_(12) anode with a mass loading of 7 mg cm^(-2),achieves a high areal capacity of 1.14 mAh cm^(-2),surpassing all previously reported directly printed ASSBs.This SPE facilitates scalable production of fully DIW-printed ASSBs with superior design flexibility and space efficiency,enabling printing onto customized targets such as flexible substrates and advancing the development of next-generation wearable electronics.展开更多
基金supported by the Nano&Material Technology Development Program through the National Research Foundation of Korea(NRF),funded by the Ministry of Science and ICT(No.RS-2025-02221332)supported by the Nano&Material Technology Development Program through the National Research Foundation of Korea(NRF)funded by the Ministry of Science and ICT(RS-2023-00283244).
文摘Stretchable triboelectric nanogenerators(TENGs)have garnered significant attention as wearable power sources by enabling the realization of self-powered systems through integration with other wearable platforms.However,achieving intrinsically stretchable TENGs with stable performance under deformation remains a major challenge,particularly in forming robust dielectric/electrode interfaces and fabricating fully stretchable materials.Here,we propose the intrinsically stretchable ionogel-based TENGs(S-iTENG)with a monolithic structure by directly coating silver nanowires(AgNWs)onto free-standing ionogel.The ionogel serves as the substrate,charge-generating,and trapping layer,simplifying device configuration.Its hydrophilic characteristics improve the wettability of AgNWs and their interfacial adhesion.The optimized S-iTENG exhibits a power density of~109.8 mW·m^(-2),excellent stretchability(~195%),and stable operation even under 80%strain.The practical feasibility of the S-iTENG is demonstrated in self-powered sensory platforms.Overall,these results highlight the significance of monolithic,substrate-free S-iTENG as wearable energy harvesters and key components for future wearable electronics.
基金supported by the Nano&Material Technology Development Program through the National Research Foundation of Korea(NRF)funded by the Ministry of Science and ICT(RS-2024-00402972)the Korea government(MSIT)(RS-2023-NR076982)support by the National Research Foundation of Korea(NRF)grant funded by the Korea government(MSIT)(RS-2023-00261543).
文摘As demand for customized wearable electronics grows,free-form Li-ion batteries(LIBs)are attracting significant attention.Although substantial advancements have been made in printed LIBs for shape-versatile electronics,the development of printable solid-state electrolytes remains challenging due to the difficulty of simultaneously achieving desirable rheological properties and ionic conductivity.In this study,a solvent-free,non-flammable solid polymer electrolyte(SPE)is designed as a novel three-dimensional(3D)printable electrolyte via direct ink writing(DIW)for all-solid-state batteries(ASSBs).The solvent-free nature of this SPE eliminates post-annealing steps,enhancing safety by mitigating risks of leakage,short-circuiting,and fire.Additionally,precise control over polymer molecular weight and electrolyte composition enables high printing resolution(-100μm),high ionic conductivity(0.705 mS cm^(-1) at 25℃),and intrinsic non-flammability.A 3D-printed ASSB,featuring a LiFePO_(4) cathode and Li_(4)Ti_(5)O_(12) anode with a mass loading of 7 mg cm^(-2),achieves a high areal capacity of 1.14 mAh cm^(-2),surpassing all previously reported directly printed ASSBs.This SPE facilitates scalable production of fully DIW-printed ASSBs with superior design flexibility and space efficiency,enabling printing onto customized targets such as flexible substrates and advancing the development of next-generation wearable electronics.
