Schematic diagram of the controllable preparation, research development, and key design parameters of hollow multishelled structure (HoMS). (a) Schematic diagram of the sequential templating approach (STA). Reproduced with permission from Ref. [83]. Copyright©2022, Springer Nature. (b) Annual publication growth of HoMS-related research and the proportion change of those prepared using STA. Reproduced with permission from Ref. [84]. Copyright©2023, John Wiley and Sons. (c) Tunable parameter system of HoMS (subunits, single-shell microstructure, multishell hierarchical architecture, and post-modification) and its correlation with typical functions/applications. Reproduced with permission from Ref. [83]. Copyright©2022, Springer Nature.