Nanostructured hybrids that physically encapsulate highly morphable, high capacity Li-ion battery anodes can potentially enable much longer cycle life than straightforward deployment of the same chemistry.
One-pot mixtures of magnetite Fe3O4 and greigite Fe3S4 powders were synthesized by sol–gel chemistry. Operando XRD measurements prove the conversion mechanism of the greigite reduction below 1.0 V vs. Li+/Li.