武汉工程大学学报2026，Vol.48Issue(3)：296-301,328,7.DOI:10.19843/j.cnki.CN42-1779/TQ.202512013
锂负极保护层的原位构筑及界面调控研究
In situ construction of protective layer for lithium metal anode and its interfacial regulation mechanism
摘要
Abstract
To address key challenges associated with lithium metal anodes in high-energy-density batteries,including severe dendrite growth,unstable solid electrolyte interphase(SEI),and substantial volume expansion,in this study,we proposed a simple and efficient in situ photopolymerization strategy——a protective layer(PL)was constructed in situ on the lithium metal anode surface using poly(ethylene glycol)diacrylate(PEGDA)and lithium bis(trifluoromethanesulfonyl)imide(LiTFSI).Characterization via Fourier transform infrared spectroscopy and scanning electron microscopy confirmed that the PL effectively accommodated volume changes during lithium plating/stripping and enhanced the stability of the electrolyte/anode interface.Moreover,the PL inhibited disordered lithium dendrite growth and blocked continuous side reactions between the electrolyte and active lithium.Electrochemical evaluations revealed that the PL effectively reduced nucleation overpotential and local current density,thereby promoting uniform and stable lithium plating/stripping.Symmetric Li||Li cells incorporating the PL achieved stable cycling for over 1 200 h,exhibiting excellent stability.And full cells assembled with LiFePO4 cathodes retained 95％of their initial specific capacity after 300 cycles at 1.0 C and maintained a high discharge specific capacity even at a high rate of 4.0 C.关键词
锂金属负极/固体电解质界面/原位聚合/锂枝晶/界面调控机制Key words
lithium metal anode/solid electrolyte interphase/in situ polymerization/lithium dendrite/interfacial regulation mechanism分类
通用工业技术引用本文复制引用
黄睿,邓惠玲,张彩芸,王照云,赵恩助,严敏..锂负极保护层的原位构筑及界面调控研究[J].武汉工程大学学报,2026,48(3):296-301,328,7.基金项目
国家自然科学基金(22409150) （22409150）
武汉市自然科学基金探索计划(晨光计划)(2024040801020326) （晨光计划）
武汉工程大学研究生教育创新基金(CX2025098) （CX2025098）
