Functional-oriented design of gradient composite fluoride interphase for enhanced silicon anode performance

. Mechanistic studies reveal that this coating not only suppresses the accumulation of P/F-containing by-products at the electrode interface but also alleviates volumetric strain by enhancing interfacial mechanical strength. This research provides novel insights for rational interface engineering of Si anodes, advancing the design and development of high-performance anode materials for lithium-ion batteries.