Lithium(Li) metal anodes(LMAs) that employ three-dimensional lithiophilic frameworks are among the most promising options for constructing high-energy-density rechargeable batteries.Herein,hollow ZnS nanosheets with t...Lithium(Li) metal anodes(LMAs) that employ three-dimensional lithiophilic frameworks are among the most promising options for constructing high-energy-density rechargeable batteries.Herein,hollow ZnS nanosheets with the coating of N-doped carbon are modified on the surface of carbon cloth(NCHZS@CC) to serve as the host material for Li metal.It is revealed that the high surface area of NCHZS@CC can significantly reduce local current density and mitigate volume change during cycling.More importantly,the lithiated product of ZnS,confined within the carbon cage,facilitates the uniform deposition of Li metal on carbon fibers and promotes the formation of a stable solid electrolyte interphase enriched with Li_(2)S,thereby improving long-term performance as the cycling progresses.Consequently,the LMAs based on NCHZS@CC demonstrate an impressive cycle life beyond560 h with an ultralow overpotential of 38 mV at a current density of 5 mA cm^(-2)with a capacity of 1 mAh cm^(-2)in the symmetric cell.In addition,when matched with a high mass loading cathode of LiFePO_(4)(11.5 mg cm^(-2)),the assembled full cell displays outstanding performance,achieving 900 cycles at a rate of 2C.展开更多
近红外量子点因其优异的组织穿透性和较低的光损伤,广泛应用于生物成像等领域。本文制备了一种水相CuInS2/ZnS-FA量子点,该量子点在近红外区域表现出优异的光学性能,具有良好的荧光稳定性和水相分散性。生物毒性测试结果显示其具有良好...近红外量子点因其优异的组织穿透性和较低的光损伤,广泛应用于生物成像等领域。本文制备了一种水相CuInS2/ZnS-FA量子点,该量子点在近红外区域表现出优异的光学性能,具有良好的荧光稳定性和水相分散性。生物毒性测试结果显示其具有良好的生物兼容性,表明该材料在生物医学成像等领域具有应用潜力。Near-infrared quantum dots are widely used in fields such as biological imaging due to their excellent tissue penetration and low light-induced damage. In this study, a water-based CuInS2/ZnS-FA quantum dot was synthesized, which exhibits outstanding optical performance in the near-infrared region, with good fluorescence stability and water dispersion. Biotoxicity tests demonstrate that the quantum dots have good biocompatibility, indicating that this material has potential applications in fields such as biomedical imaging.展开更多
基金financial supports from the National Natural Science Foundation of China(Nos.22279116 and U20A20253)the Natural Science Foundation of Zhejiang Province(Nos.LQ24E020012 and LD22E020006)Jianbing Science and Technology Project of Zhejiang Province(No.2023C01127)
文摘Lithium(Li) metal anodes(LMAs) that employ three-dimensional lithiophilic frameworks are among the most promising options for constructing high-energy-density rechargeable batteries.Herein,hollow ZnS nanosheets with the coating of N-doped carbon are modified on the surface of carbon cloth(NCHZS@CC) to serve as the host material for Li metal.It is revealed that the high surface area of NCHZS@CC can significantly reduce local current density and mitigate volume change during cycling.More importantly,the lithiated product of ZnS,confined within the carbon cage,facilitates the uniform deposition of Li metal on carbon fibers and promotes the formation of a stable solid electrolyte interphase enriched with Li_(2)S,thereby improving long-term performance as the cycling progresses.Consequently,the LMAs based on NCHZS@CC demonstrate an impressive cycle life beyond560 h with an ultralow overpotential of 38 mV at a current density of 5 mA cm^(-2)with a capacity of 1 mAh cm^(-2)in the symmetric cell.In addition,when matched with a high mass loading cathode of LiFePO_(4)(11.5 mg cm^(-2)),the assembled full cell displays outstanding performance,achieving 900 cycles at a rate of 2C.
文摘近红外量子点因其优异的组织穿透性和较低的光损伤,广泛应用于生物成像等领域。本文制备了一种水相CuInS2/ZnS-FA量子点,该量子点在近红外区域表现出优异的光学性能,具有良好的荧光稳定性和水相分散性。生物毒性测试结果显示其具有良好的生物兼容性,表明该材料在生物医学成像等领域具有应用潜力。Near-infrared quantum dots are widely used in fields such as biological imaging due to their excellent tissue penetration and low light-induced damage. In this study, a water-based CuInS2/ZnS-FA quantum dot was synthesized, which exhibits outstanding optical performance in the near-infrared region, with good fluorescence stability and water dispersion. Biotoxicity tests demonstrate that the quantum dots have good biocompatibility, indicating that this material has potential applications in fields such as biomedical imaging.
