Naturalized Bioreactor Assisted Fabrication of Ferrous(II) Phosphate NanoDots Decorated in Carbon for “Fast‐Charging” Lithium‐Ion Batteries

Abstract Biomanufacturing is an emerging technology that utilizes living organisms as production tools, with high specificity and selectivity, enabling customized production. Plant cell is a typical “factory” of biomanufacturing. Inspired by this, a novel bio‐assisted strategy for preparing biomass‐derived carbon@Fe 2 P composites has been proposed. For synthesis, Lemna minor L. is chosen as chassis plant to absorb Fe 3+ at first, then Fe 2 P can be generated in‐situ in biomass during calcination. To reveal the transformation of Fe 2 P, the fate of Fe 3+ that absorbed by Lemna minor L. has been evolved. The carbon layers derived from the naturalized bioreactors (Lemna minor L. cells) can effectively constrain and disperse the synthesized Fe 2 P within nanoscale. The produced composite exhibits excellent charging‐discharging capability that can achieve high specific capacity (≈340 mAh g −1 ) and long cycle life (2000 circles) at 1 A g −1 . These results demonstrate the green synthesis of Fe 2 P and the potential of the composite as a high‐capacity and fast‐charging anode. This strategy can also be used to prepare other transition metal phosphides (Co 2 P and Ni 12 P 5 ). In addition, this strategy combines the recovery and secondary utilization of metals in effluent, which is meaningful for phytoremediation.