Silicon nanowires (Si NWs) maintain nice promise as high-capacity anode supplies for next-generation batteries. Nevertheless, their utility is severely hindered by anisotropic lithiation, which ends up in structural failure and speedy capability fading. Right here, we introduce a novel in situ transmission electron microscopy (TEM) cross-sectional evaluation method that permits real-time visualization and quantitative evaluation of the radial structural evolution of one-dimensional (1D) nanomaterials below exterior stimuli. Making use of this technique to Si NWs, we uncover a two-tiered mechanism for regulating anisotropic lithiation in Si NWs. First, choosing axial orientations with excessive in-plane crystallographic symmetry can successfully facilitate uniform lithium (Li) diffusion and suppress directional growth. Second, rational cross-sectional design, equivalent to faceted-engineered geometries, additional suppresses anisotropy by constraining the efficient interfacial space and diffusion path size in fast-lithiation instructions. These findings present new insights into the management of anisotropic lithiation and provide a geometry-guided technique for enhancing the structural stability and efficiency of Si-based anodes. Furthermore, the methodology and anisotropy regulation ideas established listed below are broadly relevant to different 1D nanomaterials.
