sodium-ion battery

УДК 544.65+621.355.9

DOI:  https://doi.org/10.18500/1608-4039-2016-16-1-30-33

Electrochemical stability of aluminum in 0.5М NaPF6 solutions in mixtures of ethylene carbonate – dimethylcarbonate – propylene carbonate and ethylene carbonate – dimethylcarbonate – diethylcarbonate has been studied with cycling voltammetry. The reality of aluminum using as current-collector in negative electrode of sodium-ion batteries is declared.

Degradation of Na₂Ti₃O₇-based electrodes is studied by galvanostatic as well as electrochemical impedance spectroscopy methods. The rate of degradation was shown to decrease from cycle to cycle as the cycling progresses and also as the cycling current increases. It was concluded that the main reason of degradation is the gradual an electrolyte reduction with the formation of insoluble products (SEI).