%0 Journal Article
%T Biogenic Hematite from Bacteria: Facile Synthesis of Secondary Nanoclusters for Lithium Storage Capacity
%J -
%D 2019
%R https://doi.org/10.1021/acsami.8b18894
%X Ferrihydrite, or iron(III) (oxyhydr)oxide (Fe(OH)3), a representative scavenger of environmentally relevant toxic elements, has been repurposed as a low-cost and scalable precursor of well-developed hematite (汐-Fe2O3) secondary nanoclusters with a hierarchically structured morphology for lithium-ion anode materials. Here, we report that the bacteria Clostridium sp. C8, isolated from a methane-gas-producing consortium, can synthesize self-assembled secondary hematite nanoclusters (‵150 nm) composed of small nanoparticles (‵15 nm) through the molecular structural rearrangement of amorphous ferrihydrite under mild conditions. The biogenic hematite particles, wrapped with graphene oxide reduced in situ by the reducing bacteria Shewanella sp. HN-41 via one-pot synthesis, deliver an excellent reversible capacity of ‵1000 mA h g每1 after 100 cycles at a current density of 1 A g每1. Furthermore, the heat-treated hematite/rGO exhibits a capacity of 820 mA h g每1 at a high current density of 5 A g每1 and a reversible capacity of up to 1635 mA h g每1 at a current density of 100 mA g每1. This study provides an easy, eco-efficient, and scalable microbiological synthetic route to produce hierarchical hematite/rGO secondary nanoclusters with potential as high-performance Li-ion anode materials
%U https://pubs.acs.org/doi/10.1021/acsami.8b18894