Electrochemical device and method for charging the electrochemical device

Abstract

The present invention relates to an electrochemical cell (10) comprising a negative electrode (11) comprising alkali metal or alkaline earth metal (e.g. lithium), a positive electrode (12), and an electrolytic solution (13) between the negative electrode (11) and positive electrode (12). A salt (e.g. LiPF6) comprising ions of the corresponding alkali metal or alkaline earth metal of the negative electrode is dissolved in the electrolytic solution (13) with a molarity lower than 0.25M, and at least one supporting salt (e.g. TBAPF6) is dissolved in the electrolytic solution to improve the conductivity of the electrolytic solution. In addition, the electrochemical cell is configured to receive at least one electrical nucleation pulse (20; 40) having a pulse length (lp) prior to applying an electrical deposition current (21; 41) for charging of the electrochemical cell (10).

Dependencies are inferred from the claim text.