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AlN-PVDF composite protective coating for stabilizing lithium metal anodes in lithium metal batteries
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DOI：10.1007/s42823-026-01113-7.png)
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Abstract
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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. .
Keywords:
Aluminum nitride
Protective coating
Dendrite suppression
Lithium metal anode
Interfacial stability
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