Liu Haoling, Pan Wen, Xiao Bo, Jin Yunke, Li Kun, Wang An, Li Huimiao, Wu Zhibin, Chen Yuejiao, Huang Shaozhen, Mei Lin, Chen Libao
State Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, China.
Materials (Basel). 2025 Apr 24;18(9):1930. doi: 10.3390/ma18091930.
Interfacial modification strategies for lithium metal anodes have emerged as a promising method to improve cycling stability, suppress lithium dendrite growth, and increase Coulombic efficiency. However, the reported chemical synthesis methods lead to side reactions and side products, which hinder their electrochemical performance. In this study, we propose a novel and facile red phosphorus-assisted solid-state friction method to in situ fabricate a uniform LiP interphase directly on the surface of lithium metal. Interestingly, the as-formed artificial LiP interphase with high ionic conductivity and lithium affinity features significantly enhanced interfacial stability and electrochemical kinetics. The symmetric cells based on Li@P with the LiP interphase achieved a prolonged lifespan, over 1000 h, at 1 mA/cm with low polarization. When paired with a high-loading LiFePO cathode (10.5 mg/cm), the Li@P||LiFePO full cell retained 88.9% of its capacity after stable cycling for 550 cycles at 2 C and further demonstrated the excellent performance and stability of the Li@P‖LiCoO full pouch cell. This study provides an efficient and scalable strategy for stabilizing lithium metal anodes, expanding new ideas for the development of next-generation high-energy-density batteries.
锂金属负极的界面改性策略已成为一种有前景的方法，可提高循环稳定性、抑制锂枝晶生长并提高库仑效率。然而，已报道的化学合成方法会导致副反应和副产物，这阻碍了它们的电化学性能。在本研究中，我们提出了一种新颖且简便的红磷辅助固态摩擦方法，以在锂金属表面原位直接制备均匀的LiP界面层。有趣的是，所形成的具有高离子电导率和锂亲和力的人工LiP界面层具有显著增强的界面稳定性和电化学动力学。基于具有LiP界面层的Li@P的对称电池在1 mA/cm²下实现了超过1000小时的延长寿命，且极化较低。当与高负载LiFePO₄正极（10.5 mg/cm²）配对时，Li@P||LiFePO₄全电池在2 C下稳定循环550次后保留了88.9%的容量，并进一步证明了Li@P‖LiCoO₂软包全电池的优异性能和稳定性。本研究为稳定锂金属负极提供了一种高效且可扩展的策略，为下一代高能量密度电池的发展拓展了新思路。
