IP Library › Granted Patent US 12,489,144
Granted Patent B2
US 12,489,144 · App. 17/884,306 · Granted Dec 2, 2025

Silicon-based energy storage devices with cyclic carbonate containing electrolyte additives

Inventors: Liwen Ji (Irvine, CA); Heidi Anderson (Irvine, CA); Benjamin Yong Park (Irvine, CA)
Assignee: Enevate Corporation
H01M10/0567H01G11/06H01G11/42H01G11/50H01G11/52H01G11/64H01M4/134H01M4/362H01M4/386H01M4/625H01M10/0525H01M10/4235H01M2004/027H01M2300/0025H01M2300/0034
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Quick Facts
Patent No.
US 12,489,144
App. No.
17/884,306
Granted
Dec 2, 2025
Kind
B2
Abstract

Electrolytes and electrolyte additives for use in energy storage devices, comprising cyclic carbonate compounds.

Claims (13)

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 4-(2,2,3,3,4,4,5,5,6,6,7,7,7-Tridecafluoroheptyl)-1,3-dioxolan-2-one, 4-[(2,2,3,3,4,4,4-Heptafluorobutoxy)methyl]-1,3-dioxolan-2-one, 4-[(2,2,3,4,4,4-Hexafluorobutoxy)methyl]-1,3-dioxolan-2-one, 4-[(2,2-Difluoroethoxy)methyl]-1,3-dioxolan-2-one, 4-[(Hexafluoroisopropoxy)methyl]-1,3-dioxolan-2-one, 4-[(1H,1H-Perfluorohexoxy)methyl]-1,3-dioxolan-2-one, 4-[(1H,1H,9H-Perfluorononoxy)methyl]-1,3-dioxolan-2-one, 4-[(1H,1H,7H-Perfluoroheptoxy)methyl]-1,3-dioxolan-2-one, 4-[(1H,1H,2H,2H-Perfluorohexoxy)methyl]-1,3-dioxolan-2-one, and 4-[(4,4,5,5,5-Pentafluoropentoxy)methyl]-1,3-dioxolan-2-one;

wherein said Si-based electrode comprises silicon particles that are substantially silicon.

2 . The energy storage device of claim 1 , wherein the second electrode is a Si-dominant electrode.

3 . The energy storage device of claim 1 , wherein the second electrode comprises a self-supporting composite material.

4 . The energy storage device of claim 3 , wherein said self-supporting composite material comprises:

greater than 70% and less than about 90% by weight of silicon particles, and

greater than 0% and less than about 30% by weight of one or more types of carbon phases, wherein at least one of the one or more types of carbon phases is a substantially continuous phase that holds the composite material together such that the silicon particles are distributed throughout the composite material.

5 . The energy storage device of claim 1 , wherein the electrolyte further comprises fluoroethylene carbonate (FEC).

6 . The energy storage device of claim 5 , wherein the electrolyte is substantially free of non-fluorine containing cyclic carbonate.

Assignments (2)
SECURITY INTEREST Recorded Mar 10, 2026
From: ENEVATE CORPORATION
To: MCANDREWS, HELD & MALLOY LTD.
Reel/Frame 075093/0935 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Sep 4, 2025
From: JI, LIWEN; ANDERSON, HEIDI; PARK, BENJAMIN YONG
To: ENEVATE CORPORATION
Reel/Frame 072161/0331 →
Continuity (3)
Continuation 16213834 · Dec 7, 2018
Provisional Application 62596034 · Dec 7, 2017
Related Publication 20230099618A1 · Mar 30, 2023
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