Li metal batteries(LMBs)offer high energy density but suffer from Li dendrite growth and unstable solid-electrolyte interphase(SEI).Beyond conventional liquid systems,nanocolloid electrolytes(NCEs)incorporating insolu...Li metal batteries(LMBs)offer high energy density but suffer from Li dendrite growth and unstable solid-electrolyte interphase(SEI).Beyond conventional liquid systems,nanocolloid electrolytes(NCEs)incorporating insoluble nanoparticles dispersed in liquid electrolytes have emerged to mediate Li+solvation and SEI formation,which are key factors governing Li dendrite suppression.Nonetheless,their practical application has been limited by an intrinsic trade-off between nanoparticle surface area and colloidal stability.To address this limitation,we propose an intrapore-structuring strategy that enables facile Li+transport and efficient SEI regulation.Incorporating well-ordered mesopores into SiO2 nanobeads achieves high surface area while retaining dispersibility by alleviating interparticle attraction.The intrapore-structured NCE alleviates viscosity increase,enhances anion mediation at the interface,and thereby effectively suppresses Li dendrite growth while promoting the buildup of anion-derived SEI.The LMB employing the intrapore-structured NCE demonstrates cycling stability over 300 cycles at 70%capacity retention and fast-charging capability up to 3 C,far outperforming NCEs using nonporous nanobeads and 7 nm-sized nanoparticles.This work establishes intrapore-structuring as a new design principle for realizing the practical potential of NCEs in LMBs.展开更多
基金supported by the National Research Foundation(NRF)of Korea through the International Joint Research Program(RS-2024-00428511)the Young Researcher Program(RS-2024-00347111)+4 种基金the Universal Lithium Electrode-Assembly Research Associate(RS-2025-25441257)the Engineering Research Center of Excellence(RS-2023-00222166 and 2022R1A5A1033719)Programsthe HRD Program for Industrial Innovation(RS-2024-00420590)funded by the Ministry of Science and ICT(MSIT)funding from the National Research Council of Science&Technology(NST)grant(GTL24012-000)financial support from the Yonsei University Research Fund(2024-22-0503 and 2025-12-0055).
文摘Li metal batteries(LMBs)offer high energy density but suffer from Li dendrite growth and unstable solid-electrolyte interphase(SEI).Beyond conventional liquid systems,nanocolloid electrolytes(NCEs)incorporating insoluble nanoparticles dispersed in liquid electrolytes have emerged to mediate Li+solvation and SEI formation,which are key factors governing Li dendrite suppression.Nonetheless,their practical application has been limited by an intrinsic trade-off between nanoparticle surface area and colloidal stability.To address this limitation,we propose an intrapore-structuring strategy that enables facile Li+transport and efficient SEI regulation.Incorporating well-ordered mesopores into SiO2 nanobeads achieves high surface area while retaining dispersibility by alleviating interparticle attraction.The intrapore-structured NCE alleviates viscosity increase,enhances anion mediation at the interface,and thereby effectively suppresses Li dendrite growth while promoting the buildup of anion-derived SEI.The LMB employing the intrapore-structured NCE demonstrates cycling stability over 300 cycles at 70%capacity retention and fast-charging capability up to 3 C,far outperforming NCEs using nonporous nanobeads and 7 nm-sized nanoparticles.This work establishes intrapore-structuring as a new design principle for realizing the practical potential of NCEs in LMBs.
