fig7

Figure 7. (A) Schematic of the conversion mechanism from lignin to porous carbon, including aromatic rebounding, refusion, and deoxygenation reactions. (B) Schematic illustration of a NaCl-templated strategy for the preparation of carbon quantum dots and porous carbon from lignin. (C) Rate performance at different current densities of 0.1, 0.2, 0.5, 1, 2, and 3 C, and (D) long-term cycling performance and corresponding Coulombic efficiencies at 1 C for 400 cycles. Reprinted with permission from Ref.^[111]. Copyright © 2021 Elsevier.