Antipulverization Electrode Based on Low-Carbon Triple-Shelled Superstructures for Lithium-Ion Batteries.

摘要: The realization of antipulverization electrode structures, especially using low-carbon-content anode materials, is crucial for developing high-energy and long-life lithium-ion batteries (LIBs); however, this technology remains challenging. This study shows that SnO2 triple-shelled hollow superstructures (TSHSs) with a low carbon content (4.83%) constructed by layer-by-layer assembly various nanostructure units can withstand huge volume expansion ≈231.8% deliver high reversible capacity 1099 mAh g-1 even after 1450 cycles. These values represent the best comprehensive performance in -based anodes to date. Mechanics simulations situ transmission electron microscopy suggest TSHSs enable self-synergistic structure-preservation behavior upon lithiation/delithiation, protecting from collapse guaranteeing structural integrity during long-term cycling. Specifically, outer shells lithiation processes are fully lithiated, preventing overlithiation inner shells; turn, delithiation processes, underlithiated work as robust cores support contraction meanwhile, middle abundant pores offer sufficient space accommodate change shell both delithiation. opens new avenue development high-performance LIBs practical energy applications.