Fig. 10From: Advances in mechanochemical processes for biomass valorizationMechanical step and carbonization of a mixture of sawdust, urea and/or melamine and K2CO3 to prepare N-doped carbons as electrode for lithium-sulfur batteries. Reprinted with permission from Ref. Reprinted with permission from Ref. [37] Copyright (2019) Wiley-VCHBack to article page