Monovalent manganese based anodes and co-solvent electrolyte for stable low-cost high-rate sodium-ion batteries
Year: 2018
Type: article
Abstract: The demand of sustainable power supply requires high-performance cost-effective energy storage technologies. Here we report a high-rate long-life low-cost sodium-ion battery full-cell system by innovating both the anode and the electrolyte. The redox couple of manganese(I/II) in Prussian blue analogs enables a high-rate and stable anode. Soft X-ray absorption spectroscopy and resonant inelastic X-ray scattering provide direct evidence suggesting the existence of monovalent manganese in the charged anode. There is a strong hybridization between cyano ligands and manganese-3d states, which benefits the electronic property for improving rate performance. Additionally, we employ an organic-aqueous cosolvent electrolyte to solve the long-standing solubility issue of Prussian blue analogs. A full-cell sodium-ion battery with low-cost Prussian blue analogs in both electrodes and co-solvent electrolyte retains 95% of its initial discharge capacity after 1000 cycles at 1C and 95% depth of discharge. The revealed manganese(I/II) redox couple inspires conceptual innovations of batteries based on atypical oxidation states.
Source: Nature Communications
Language: English
Subfield: Electrical and Electronic Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $6,990
Funders: National Science Foundation, U.S. Department of Energy, Advanced Research Projects Agency - Energy, Office of Science, Advanced Research Projects Agency, Materials Research Science and Engineering Center, Harvard University, Division of Materials Research, Basic Energy Sciences, Laboratory Directed Research and Development, Lawrence Berkeley National Laboratory
Awards: G1079818582, G1143651532, G1286236842, G1286251239, G1414775356, G1445641779, G1472743852, G1816284028, G1863003419, G213222014, G2199371856, G2618837358, G2735999379, G2857863752, G30714459, G3083819904, G349715080, G365575497, G3967535168, G419881185, G42916606, G4501827968, G4796240486, G498139845, G5849692847, G650090426, G654302390, NYU Materials Research Science and Engineering Center, G6652958823, G7354628648, G805243471, G821361635, G969889393
OpenAlex ID: W2806853812