These findings pave new avenues for a more sophisticated design of high-energy Si-graphite anodes. Silicon mitigates the depth heterogeneity of graphite during lithiation due to its rapid surface diffusion and kinetic-derived overpotential. Different kinetics induces interplay during the competitive reaction, affecting depth heterogeneity. During delithiation, the driving force of electrochemical potentials increases, resulting in sequential reactions from graphite to silicon. Graphite and silicon simultaneously lithiated during lithiation by competition between redox potentials and interparticle diffusion. We investigate the complex dynamics of a silicon–graphite blended electrode using side-view operando optical microscopy, highlighting the proper mechanisms of SOC heterogeneity. Downsampling images leads to smaller documents for quicker loading. with downsampled images, document security, but without pre-press page marks, bleed, etc. For webPDF files for web use are optimized for screen use, i.e. Considering mechanisms at an electrode level, intra-/interparticle heterogeneity depending on state-of-charge (SOC) becomes problematic due to their complex kinetic properties. PDF files are perfect for web distribution and professional printing.
Silicon–graphite composites exhibit practical use as anodes, but the complex mechanisms in blended electrodes have not been investigated. Reaction heterogeneity is a crucial factor that influences the design of composite electrodes.
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