Sangsanit Thitiphum, Songthan Ronnachai, Prempluem Surat, Tejangkura Worapol, Sawangphruk Montree
Centre of Excellence for Energy Storage Technology, Department of Chemical and Biomolecular Engineering, School of Energy Science and Engineering, Vidyasirimedhi Institute of Science and Technology, Rayong 21210, Thailand.
Nano Lett. 2025 Jun 4;25(22):9047-9053. doi: 10.1021/acs.nanolett.5c01595. Epub 2025 May 22.
This study advances anode-free lithium-metal batteries (AFLMBs) by integrating nickel-rich NMC90 cathodes and fluorine-rich electrolytes in large-format 18650 cylindrical cells. A key innovation is the incorporation of 10 wt % Li-rich LiNiO as a prelithiation agent in the cathode, which mitigates initial lithium-loss and improves the Coulombic efficiency. The electrolyte includes 30% (v/v) fluoroethylene carbonate (FEC) as a cosolvent, which suppresses inactive lithium deposition and stabilizes the solid electrolyte interphase (SEI). Unlike conventional AFLMBs that require external pressure, this work uses a stainless-steel casing with a tailored jelly roll configuration to mechanically regulate lithium plating. The optimized cells deliver an energy density of 320 Wh/kg, maintain stable cycling over 140 cycles, and support 4C-rate operation. Post-mortem analysis reveals a LiF-rich SEI that extends the cycle life, while X-ray diffraction provides insights into structural evolution. This research offers a scalable strategy for high-energy AFLMBs through the synergy of prelithiation, electrolyte design, and mechanical stabilization.
本研究通过在大型18650圆柱形电池中集成富镍NMC90阴极和富氟电解质，推动了无阳极锂金属电池（AFLMBs）的发展。一项关键创新是在阴极中加入10 wt%的富锂LiNiO作为预锂化剂，这减轻了初始锂损失并提高了库仑效率。电解质包含30%（v/v）的氟代碳酸乙烯酯（FEC）作为共溶剂，可抑制非活性锂沉积并稳定固体电解质界面（SEI）。与需要外部压力的传统AFLMBs不同，这项工作使用具有定制卷绕结构的不锈钢外壳来机械调节锂电镀。优化后的电池能量密度为320 Wh/kg，在140次循环中保持稳定循环，并支持4C倍率运行。事后分析揭示了富含LiF的SEI，其延长了循环寿命，而X射线衍射提供了对结构演变的见解。本研究通过预锂化、电解质设计和机械稳定化的协同作用，为高能AFLMBs提供了一种可扩展的策略。
