Stable SEI Formation on Al-Si-Mn Metallic Glass Li-Ion Anode

Alloying anodes such as silicon are of great interest for lithium-ion batteries due to their high storage capacities, but have only seen minimal commercial deployment limited calendar life. This has been attributed an intrinsically unstable solid electrolyte interphase (SEI) that is aggravated by mechanical failure. An amorphous structure can mitigate lithiation strains, and alloys, or metallic glasses, often exhibit exceptional fracture toughness. Additional elements be added glasses improve passivation. Splat quenching was utilized prepare Al64Si25Mn11 Li-ion anode with a specific capacity >900 mAh g-1 remains upon cycling. On this glass electrode, parasitic reduction found much reduced in comparison pure Si Al, comparable on Cu. The SEI thinner, more stable, richer fluorinated inorganic phases than the formed Si, while organic carbonate compounds lithium ethylene decarbonate (LiEDC) notably absent. study indicates become viable new class materials improved surface passivity.