A cellulose carbonaceous aerogel/MnO2 ultrathick electrode with a unique low curvature, porous carbon thin-walled tube array structure was obtained from natural wood using a simple top-down approach.
The homogeneously distributed Fe–N–C active sites of TCPC/Fe–N–C synthesized through CO2 conversion and ammonia solution treatment enable thermodynamically favorable energy reduction for lithium sulfide conversion and Li-ion transport.