US 12,243,982 B2
Silicon-based energy storage devices with cyclic organosilicon containing electrolyte additives
Liwen Ji, Irvine, CA (US); and Benjamin Yong Park, Irvine, CA (US)
Assigned to Enevate Corporation, Irvine, CA (US)
Filed by Enevate Corporation, Irvine, CA (US)
Filed on Oct. 29, 2021, as Appl. No. 17/514,930.
Application 17/514,930 is a continuation of application No. 16/230,226, filed on Dec. 21, 2018, granted, now 11,165,099.
Prior Publication US 2022/0052380 A1, Feb. 17, 2022
Int. Cl. H01M 10/0567 (2010.01); H01M 4/134 (2010.01); H01M 4/38 (2006.01); H01M 10/0525 (2010.01); H01M 10/058 (2010.01)
CPC H01M 10/0567 (2013.01) [H01M 4/134 (2013.01); H01M 4/386 (2013.01); H01M 10/0525 (2013.01); H01M 10/058 (2013.01); H01M 2300/0025 (2013.01)] 6 Claims
 
1. An energy storage device comprising:
a first electrode and a second electrode, wherein at least one of the first electrode and the second electrode is a Si-based electrode;
a separator between the first electrode and the second electrode;
an electrolyte; and
at least one electrolyte additive comprising a compound selected from the group consisting of 2,4,6,8,10-pentamethyl-2,4,6,8,10-pentakis (3,3,3-trifluoropropyl)-cyclopentasiloxane; 2,2,4,4,6-pentamethyl-6-(2-cyanoethyl)-[1,3,5,2,4,6] cyclotrisiloxane; 2,2,4,4,6,6,8-heptamethyl-8-(2-cyanoethyl)-[1,3,5,7,2,4,6,8] cyclotetrasiloxane; 2,2,4,4,6,6,8,8,10-nonamethyl-10-(2-cyanoethyl)-[1,3,5,7,9,2,4,6,8,10] cyclopentasiloxane; 2,2,4,4,6,6,8,8,10,10,12-undecamethyl-12-(2-cyanoethyl)-[1,3,5,7,9,11,2,4,6,8,10,12] cyclohexasiloxane; 2,2,4,4,6,6,8,8,10,10,12,12,14-tridecamethyl-12-(2-cyanoethyl)-[1,3,5,7,9,11,13,2,4,6,8,10,12,14] cycloheptasiloxane; 2,2,4,4,6,6,8,8,10,12-decamethyl-10,12-di (2-cyanoethyl)-[1,3,5,7,9,11,2,4,6,8,10,12] cyclohexasiloxane; 2,2,4,6,8-pentamethyl-4,6,8-tri (2-cyanoethyl)-[1,3,5,7,2,4,6,8] cyclotetrasiloxane; 2,2,4,4,6,8,8,10,12-nonamethyl-8,10,12-tri (2-cyanoethyl)-[1,3,5,7,9,11,2,4,6,8,10,12] cyclohexasiloxane; 2,4,6,8-tetramethyl-2,4,6,8-tetra (2-cyanoethyl)-[1,3,5,7,2,4,6,8] cyclotetrasiloxane; 2,2,4,6,8,10-hexamethyl-4,6,8,10-tetra (2-cyanoethyl)-[1,3,5,7,9,2,4,6,8,10] cyclopentasiloxane; 2,2,4,4,6,8,10,12-octamethyl-6,8,10,12-tetra (2-cyanoethyl)-[1,3,5,7,9,11,2,4,6,8,10,12] cyclohexasiloxane; and 2,4,6,8,10-pentamethyl-2,4,6,8,10-penta (2-cyanoethyl)-[1,3,5,7,9,2,4,6,8,10] cyclopentasiloxane; and
wherein said Si-based electrode comprises silicon particles having a median largest dimension between about 0.1 μm and about 30 μm.