Monovalent manganese based anodes and co-solvent electrolyte for stable low-cost high-rate sodium-ion batteries.

Autor:	Firouzi A; Alveo Energy, Palo Alto, CA, 94303, USA., Qiao R; Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA., Motallebi S; Alveo Energy, Palo Alto, CA, 94303, USA., Valencia CW; Alveo Energy, Palo Alto, CA, 94303, USA., Israel HS; Alveo Energy, Palo Alto, CA, 94303, USA., Fujimoto M; Alveo Energy, Palo Alto, CA, 94303, USA., Wray LA; Department of Physics, New York University, New York,, NY, 10003, USA., Chuang YD; Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA., Yang W; Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA. WLYang@lbl.gov., Wessells CD; Alveo Energy, Palo Alto, CA, 94303, USA. colin@alveoenergy.com.
Jazyk:	angličtina
Zdroj:	Nature communications [Nat Commun] 2018 Feb 28; Vol. 9 (1), pp. 861. Date of Electronic Publication: 2018 Feb 28.
DOI:	10.1038/s41467-018-03257-1
Abstrakt:	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.
Databáze:	MEDLINE
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