Although Li metal has a great potential for application as anode of the next generation batteries, the existing problems of the lithium dendrite growth and volume expansion need to be solved to pave the way for the real application of Li metal anode. Here, a double-layer structure consisting of poly(vinylidene fluoride-co-hexafluoropropene) (PVDF-HFP)/ZnO composite membrane and ZnO buffer layer was fabricated by solid-state method and spin coating to protect the Li metal. Compared to the bare Li electrode, the protected Li electrode displays the advantages of stable voltage profiles and long lifespan. Interestingly, the ZnO buffer layer between Li metal and PVDF-HFP/ZnO composite membrane can significantly reduce the battery resistance because of the formation of Li₂O on the ZnO nanorod surface, which can guide Li⁺ flux to deposit uniformly onto Li metal. Results show that the double-layer structure on the Li metal surface can inhibit dendrite growth and volume expansion. The analyses in this paper may contribute to a better understanding of the reaction mechanism between ZnO and Li⁺.

尽管锂金属具有用作下一代电池阳极的巨大潜力，但仍需要解决锂枝晶生长和体积膨胀的现有问题，从而为锂金属阳极的实际应用铺平道路。在此，通过固态法和旋涂法制造了由聚偏二氟乙烯-共六氟丙烯（PVDF-HFP）/ ZnO复合膜和ZnO缓冲层组成的双层结构，以保护Li金属。与裸露的Li电极相比，受保护的Li电极显示出稳定的电压曲线和长寿命的优点。有趣的是，由于Li ₂的形成，Li金属与PVDF-HFP / ZnO复合膜之间的ZnO缓冲层可以显着降低电池电阻。ZnO纳米棒表面上的O可以引导Li ⁺助熔剂均匀地沉积到Li金属上。结果表明，Li金属表面的双层结构可以抑制枝晶生长和体积膨胀。本文的分析可能有助于更好地理解ZnO与Li ⁺的反应机理。