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

Nature Communications
Ali FirouziColin D Wessells

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.

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Citations

Apr 28, 2020·Advanced Materials·Qi LiHaoshen Zhou
Aug 14, 2019·Chemical Communications : Chem Comm·Ajay Piriya Vijaya Kumar SarojaRamaprabhu Sundara
Aug 14, 2020·Dalton Transactions : an International Journal of Inorganic Chemistry·Jue WuWanli Yang
Oct 27, 2020·Frontiers in Chemistry·Jinpeng WuWanli Yang
Oct 26, 2018·The Journal of Physical Chemistry Letters·Zengqing ZhuoWanli Yang
Sep 4, 2021·ACS Applied Materials & Interfaces·Paula Sanz CamachoLaurence Croguennec
Jan 6, 2022·Journal of Synchrotron Radiation·Daniel J HigleyGeorgi L Dakovski
Jan 7, 2022·ACS Applied Materials & Interfaces·Xaver LamprechtAliaksandr S Bandarenka

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Methods Mentioned

BETA
X-ray
XRD

Software Mentioned

Intertek
LAPACK

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