Fabrication of a Rigid-Flexible Lithium Anode Interfacial Protection Layer <italic style="font-style: italic">via</italic> Photopolymerization and Electrochemical Performance

Jie Ni; Wei Shen; Cun-man Zhang

doi:10.11777/j.issn1000-3304.2026.26014

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Fabrication of a Rigid-Flexible Lithium Anode Interfacial Protection Layer via Photopolymerization and Electrochemical Performance

更新时间：2026-05-15

- Fabrication of a Rigid-Flexible Lithium Anode Interfacial Protection Layer via Photopolymerization and Electrochemical Performance
- Acta Polymerica Sinica Pages: 1-13(2026)
- 作者机构：
  
  1.同济大学机械工程博士后流动站＆汽车与能源学院上海 201804
  2.同济大学汽车与能源学院＆新能源汽车工程中心上海 201804
  3.上海济鼎实业有限公司上海 201804
- 作者简介：
  
  Jie Ni, E-mail: nijie@tongji.edu.cn
- 基金信息：
- DOI：10.11777/j.issn1000-3304.2026.26014
  CLC：
- CSTR：32057.14.GFZXB.2026.7575
- Received：21 January 2026，
  
  Accepted：04 March 2026，
  
  Online First：15 May 2026，
- 稿件说明：
移动端阅览
倪洁, 沈伟, 张存满. 光聚合制备刚柔并济的锂负极界面保护层及其电化学性能. 高分子学报, doi: 10.11777/j.issn1000-3304.2026.26014.

Ni, J; Shen, W; Zhang, C. M. Fabrication of a rigid-flexible lithium anode interfacial protection layer via photopolymerization and electrochemical performance. Acta Polymerica Sinica (in Chinese), doi: 10.11777/j.issn1000-3304.2026.26014.
倪洁, 沈伟, 张存满. 光聚合制备刚柔并济的锂负极界面保护层及其电化学性能. 高分子学报, doi: 10.11777/j.issn1000-3304.2026.26014. DOI： CSTR： 32057.14.GFZXB.2026.7575.

Ni, J; Shen, W; Zhang, C. M. Fabrication of a rigid-flexible lithium anode interfacial protection layer via photopolymerization and electrochemical performance. Acta Polymerica Sinica (in Chinese), doi: 10.11777/j.issn1000-3304.2026.26014. DOI： CSTR： 32057.14.GFZXB.2026.7575.

摘要

针对锂电池负极界面副反应问题，通过光聚合法在锂负极表面构筑了“刚柔并济”的无机-有机复合界面层. 该层具有优异的锂离子传输能力及力学性能，能引导锂离子均化沉积、抑制锂枝晶生长并适应锂负极体积变化，有效提升电池循环稳定性.

Abstract

Lithium metal anodes

with their ultrahigh theoretical specific capacity

are regarded as ideal candidates for next-generation high-energy-density batteries. However

its practical application is hindered by uncontrolled dendrite growth

severe interfacial side reactions

and significant volume change. The low lithium-ion transference number of conventional liquid electrolyt

es exacerbates the ionic concentration gradients at the electrode surface

further aggravating these issues. This study proposed and validated a facile photopolymerization strategy for constructing a rigid-yet-flexible ion-organic composite layer (IOL) on a lithium metal surface. This IOL was composed of inorganic cubic-phase garnet (Al/Nb-LLZO) particles with high ionic conductivity and mechanical rigidity

compounded with an elastic organic matrix of bisphenol A-glycerolate dimethacrylate (Bis-GMA). Systematic characterization confirmed that the composite IOL exhibited an ionic conductivity of 2.3×10

-5

S/cm and a high Li

transference number of 0.82

which homogenized the Li

flux and accelerated interfacial transport. Meanwhile

its synergistic rigid-flexible structure physically suppressed dendrite growth while accommodating volume changed during cycling and maintaining intimate interfacial contact. Electrochemical performance tests demonstrated that the IOL-modified symmetric cell exhibited ultralow and stable polarization (about 0.15 V) for over 3000 h. When paired with an NCM811 cathode

the full cell with a limited lithium source exhibited significantly enhanced cycling stability. Post-mortem microscopic analysis further revealed that the IOL guided the lithium metal to deposit in a dense and planar morphology

effectively suppressing "dead Li" formation and parasitic reactions. This study provides an efficient and scalable solution for concurrently addressing the kinetic

mechanical

and chemical stability challenges of lithium metal anodes from an interfacial engineering perspective

offering crucial insights for advancing the practical application of high-energy-density lithium metal batteries.

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Fabrication of a Rigid-Flexible Lithium Anode Interfacial Protection Layer via Photopolymerization and Electrochemical Performance

DOI：10.11777/j.issn1000-3304.2026.26014

摘要

Abstract

关键词

Keywords

references