US 12,224,438 B2
Specific electrochemical cell for accumulator operating according to the principle of forming an alloy with the active material of the negative electrode comprising a specific pair of electrodes
Sébastien Martinet, Grenoble (FR); and Carole Bourbon, Grenoble (FR)
Assigned to COMMISSARIAT À L'ÉNERGIE ATOMIQUE ET AUX ÉNERGIES ALTERNATIVES, Paris (FR)
Filed by COMMISSARIAT À L'ÉNERGIE ATOMIQUE ET AUX ÉNERGIES ALTERNATIVES, Paris (FR)
Filed on Jan. 4, 2021, as Appl. No. 17/140,467.
Claims priority of application No. 2000086 (FR), filed on Jan. 7, 2020.
Prior Publication US 2021/0210781 A1, Jul. 8, 2021
Int. Cl. H01M 4/58 (2010.01); H01M 4/133 (2010.01); H01M 4/134 (2010.01); H01M 4/136 (2010.01); H01M 4/587 (2010.01); H01M 10/052 (2010.01); H01M 10/054 (2010.01); H01M 10/0567 (2010.01); H01M 10/0568 (2010.01); H01M 10/0569 (2010.01)
CPC H01M 4/582 (2013.01) [H01M 4/133 (2013.01); H01M 4/134 (2013.01); H01M 4/136 (2013.01); H01M 4/587 (2013.01); H01M 10/052 (2013.01); H01M 10/054 (2013.01); H01M 10/0567 (2013.01); H01M 10/0568 (2013.01); H01M 10/0569 (2013.01); H01M 2300/0025 (2013.01); H01M 2300/0037 (2013.01)] 13 Claims
 
1. An electrochemical cell comprising:
a negative electrode comprising an active material comprising a material alloyable with an element M, wherein M comprises an alkali element or an alkaline earth element;
a positive electrode comprising an active material comprising a conversion material; and
an electrolyte solution comprising at least one salt of M disposed between the negative electrode and the positive electrode; and wherein
during a charging process, the active material of the negative electrode forms an alloy with M of the salt of M of the electrolyte solution,
the electrolyte solution comprising a liquid solvent comprising one or more organic solvents, at least one salt of M, and one or more additives selected from the group consisting of vinylidene carbonate, fluoroethylene carbonate and mixtures thereof, each additive being comprised in the electrolyte solution at a content not exceeding 10% by mass of the total mass of the electrolyte solution.