AlN-PVDF composite protective coating for stabilizing lithium metal anodes in lithium metal batteries

IF 6.2 3区材料科学 Q2 CHEMISTRY, MULTIDISCIPLINARY

Carbon Letters Pub Date : 2026-07-14 DOI:10.1007/s42823-026-01113-7

Seul Ki Choi, Yun Seung Nah, Minho Yang

引用次数: 0

Abstract

Lithium metal anodes suffer from unstable interfacial behavior during repeated cycling, which limits their application in high-energy-density batteries. Herein, an AlN-PVDF composite layer was fabricated on Li metal anodes via a spray-coating process, and its influence on electrochemical performance was investigated. The AlN-PVDF coating did not alter the initial charge/discharge behavior of the cells. Compared with bare Li metal anodes, cells employing the AlN-PVDF@Li anode exhibited a smaller charge/discharge voltage hysteresis and improved cycling stability. In full cells assembled with NMC622 cathodes, the AlN-PVDF@Li anode retained approximately 116 mAh g^− 1 after 200 cycles at 5 C, corresponding to a capacity loss of ~ 20%, whereas the bare Li cell retained only ~ 94 mAh g^− 1 (~ 30% loss). These results demonstrate that a simple AlN-PVDF surface modification can effectively improve the electrochemical stability of Li metal anodes in full-cell configurations.

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稳定锂金属电池负极用AlN-PVDF复合保护涂层

锂金属阳极在重复循环过程中存在不稳定的界面行为，这限制了其在高能量密度电池中的应用。本文采用喷涂工艺在锂金属阳极上制备了AlN-PVDF复合层，并研究了其对电化学性能的影响。AlN-PVDF涂层没有改变电池的初始充放电行为。与裸锂金属阳极相比，采用AlN-PVDF@Li阳极的电池具有更小的充放电电压滞后和更高的循环稳定性。在用NMC622阴极组装的完整电池中，AlN-PVDF@Li阳极在5℃下200次循环后保留约116 mAh g - 1，相当于容量损失约20%，而裸锂电池仅保留约94 mAh g - 1（损失约30%）。这些结果表明，简单的AlN-PVDF表面改性可以有效地提高锂金属阳极在全电池配置下的电化学稳定性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Carbon Letters CHEMISTRY, MULTIDISCIPLINARY-MATERIALS SCIENCE, MULTIDISCIPLINARY

CiteScore

7.30

自引率

20.00%

发文量

118

期刊介绍： Carbon Letters aims to be a comprehensive journal with complete coverage of carbon materials and carbon-rich molecules. These materials range from, but are not limited to, diamond and graphite through chars, semicokes, mesophase substances, carbon fibers, carbon nanotubes, graphenes, carbon blacks, activated carbons, pyrolytic carbons, glass-like carbons, etc. Papers on the secondary production of new carbon and composite materials from the above mentioned various carbons are within the scope of the journal. Papers on organic substances, including coals, will be considered only if the research has close relation to the resulting carbon materials. Carbon Letters also seeks to keep abreast of new developments in their specialist fields and to unite in finding alternative energy solutions to current issues such as the greenhouse effect and the depletion of the ozone layer. The renewable energy basics, energy storage and conversion, solar energy, wind energy, water energy, nuclear energy, biomass energy, hydrogen production technology, and other clean energy technologies are also within the scope of the journal. Carbon Letters invites original reports of fundamental research in all branches of the theory and practice of carbon science and technology.