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Investigation of sodium plating and stripping on a bare current collector with different electrolytes and cycling protocols.

08:00 EDT 13th September 2019 | BioPortfolio

Summary of "Investigation of sodium plating and stripping on a bare current collector with different electrolytes and cycling protocols."

In the present study, stable sodium plating/stripping has been achieved on bare aluminium current collector, without any surface modifications or artificial SEI deposition. The crucial role of pre-deposited sodium using cyclic voltammetry on bare aluminium as a matrix for plating/stripping has been highlighted using different protocols for cycling. The pre-deposition strategy ensures stable and efficient cycling of sodium in anode-free sodium batteries without dendritic formations. The study highlights the difference of sodium plating/stripping in carbonate and glyme solvent electrolytes on the bare aluminium current collector. Contrary to the carbonate solvent electrolyte, cell with tetraglyme solvent electrolyte and sodium loading of 1 mAh/cm2 has overpotential under 20 mV during the sodium plating/stripping cycles at 0.5 mA/cm2 for a testing period of 650 hrs. Overpotentials under 40 and 100 mV have been achieved at current densities up to 1 and 2 mA/cm2 for loadings up to 5 and 10 mAh/cm2 respectively for testing time up to 1500 hrs. DFT simulations have been performed to obtain the solvation energies, and the HOMO-LUMO band gap of the solvent-sodium ion complexes for the glyme solvent electrolytes and their trends have been correlated with the experimental observations.

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This article was published in the following journal.

Name: ACS applied materials & interfaces
ISSN: 1944-8252
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