Silicon-based energy storage devices with functional thiophene compounds or derivatives of thiophene containing electrolyte additives

Patent metadata

Field	Value
Publication number	US-11569530-B2
Application number	US-202016890576-A
Country	US
Kind code	B2
Filing date	Jun 2, 2020
Priority date	Jun 5, 2019
Publication date	Jan 31, 2023
Grant date	Jan 31, 2023

Abstract

Electrolytes and electrolyte additives for energy storage devices comprising functional thiophene compounds are disclosed. The energy storage device comprises 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 selected from a thiophene compound.

First claim

What is claimed is:

1. An energy storage device comprising:
a first electrode and a second electrode, wherein one or both 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 thiophene compound, wherein said thiophene compound is Diethyl (2-thienylmethyl)phosphonate (DTYP).

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 film.

4. The energy storage device of claim 3 , wherein the composite material film comprises:
greater than 0% and less than about 90% by weight of silicon particles, and
greater than 0% and less than about 90% 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 film together such that the silicon particles are distributed throughout the composite material film.

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.

Assignees

• Enevate Corp

Inventors

• Ji Liwen
• Park Benjamin Yong
• Ansari Younes
• Canton Giulia

Classifications

• C07D333/34

  Sulfur atoms · CPC title

• C07D333/38 Primary

  Carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals · CPC title

• H01M4/625

  Carbon or graphite · CPC title

• C07F7/0814

  said ring is substituted at a C ring atom by Si · CPC title

• C07D495/04

  Ortho-condensed systems · CPC title