Battery electrode composition comprising biomass-derived carbon

Patent metadata

Field	Value
Publication number	US-2022302452-A1
Application number	US-202217805953-A
Country	US
Kind code	A1
Filing date	Jun 8, 2022
Priority date	Sep 14, 2018
Publication date	Sep 22, 2022
Grant date	—

Abstract

An embodiment is directed to an electrode composition for use in an energy storage device cell. The electrode comprises composite particles, each comprising carbon that is biomass-derived and active material. The active material exhibits partial vapor pressure below around 10−13 torr at around 400 K, and an areal capacity loading of the electrode composition ranges from around 2 mAh/cm2 to around 16 mAh/cm2.

First claim

1 . An electrode composition for use in an energy storage device cell, comprising:
a composite particle, comprising a Si-comprising active material and carbon that is biomass-derived, wherein the Si-comprising active material exhibits partial vapor pressure below around 10 −13 torr at around 400 K.

2 . The electrode composition of claim 1 ,
wherein the Si-comprising active material is at least partially in the form of Si-comprising particles, wherein a size of the Si-comprising particles ranges from around 1 nm to around 100 nm.

3 . The electrode composition of claim 1 , wherein an areal capacity loading of the electrode composition ranges from around 2 mAh/cm 2 to around 16 mAh/cm 2 .

4 . The electrode composition of claim 1 , wherein a weight ratio of the Si-comprising active material to the biomass-derived carbon in the composite particle ranges from around 1:3 to around 9:1.

5 . The electrode composition of claim 1 , wherein the electrode composition comprises multiple instances of the composite particle with an average size that ranges from around 300 nm to around 20 microns.

6 . The electrode composition of claim 1 , wherein the biomass-derived carbon is derived from one or more of (i) nut shells, (ii) pits, (iii) wood, (iv) bamboo, (v) grass, straw or dry leaves, (vi) corn grain, (vii) plane tree fluff, (viii) natural carbohydrates, (ix) or any combination thereof.

7 . The electrode composition of claim 6 ,
wherein the biomass-derived carbon is derived at least in part from the natural carbohydrates, and wherein the one or more natural carbohydrates comprise cellulose, chitin, alginate, sucrose, glucose, starch, or any combination thereof.

8 . The electrode composition of claim 6 ,
wherein the biomass-derived carbon is derived at least in part from the nut shells, and wherein the nut shells are selected from coconut shells, apricot shells, almond shells, or any combination thereof.

9 . The electrode composition of claim 1 , wherein the biomass-derived carbon is porous.

10 . The electrode composition of claim 9 ,
wherein the electrode composition comprises multiple instances of the composite particle, and wherein the biomass-derived carbon of the multiple instances of the composite particle exhibits an average Brunauer-Emmett-Teller (BET) specific surface area (SSA) in a range from about 400 m 2 /g to about 5,000 m 2 /g and a pore volume in a range from around 0.4 cm 3 /g to around 6 cm 3 /g.

11 . The electrode composition of claim 9 , wherein at least some pores in the biomass-derived carbon are produced by physical activation, chemical activation, or a combination thereof.

12 . The electrode composition of claim 9 , wherein about 50 to about 100 wt. % of the Si-comprising active material in the composite particle are confined within one or more pores defined in the biomass-derived carbon.

13 . The electrode composition of claim 1 , wherein the biomass-derived carbon comprises an ash content of less than about 1 wt. %.

14 . The electrode composition of claim 1 , wherein the composite particle additionally comprises carbon that is derived from one or more synthetic polymers or one or more hydrocarbon gases.

15 . The electrode composition of claim 1 , wherein the composite particle is porous with a total pore volume that ranges from around 2 vol. % to around 75 vol. %.

16 . The electrode composition of claim 15 , wherein from around 50 vol. % to around 100 vol. % of pores within the composite particle are configured to remain sealed and inaccessible to electrolyte while the electrode composition is made part of the energy storage device cell.

17 . The energy storage device cell, comprising:
the electrode composition of claim 1 ; and a solid electrolyte.

18 . The energy storage device cell, comprising:
an electrode comprising the electrode composition of claim 1 , wherein the energy storage device cell is a Na-ion battery, a Na metal battery, a Li-ion battery or a Li metal battery.

19 . The energy storage device cell of claim 18 ,
wherein the energy storage device cell is the Li-ion battery.

20 . The energy storage device cell of claim 18 ,
wherein the electrode in the energy storage device cell is filled with electrolyte, wherein the electrolyte occupies from 7 to 35 vol. % of the electrode.

21 . The electrode composition of claim 1 , wherein one or more components of the electrode composition are made part of the electrode composition via vapor deposition.

22 . The electrode composition of claim 1 , wherein one or more components of the electrode composition are hydrothermally treated.

23 . The electrode composition of claim 1 , additionally comprising conductive additives selected from single-walled carbon nanotubes, double-walled carbon nanotubes, and multi-wall carbon nanotubes, a volume fraction of the additives within the electrode composition being below about 2 vol. %.

24 . The electrode composition of claim 1 , wherein the Si-comprising active material is infiltrated into the biomass-derived carbon by chemical vapor deposition.

25 . The electrode composition of claim 1 , wherein the Si-comprising active material is coated with a protective surface layer comprising carbon.

26 . A method, comprising:
assembling an electrode from an electrode composition while in a discharged state, wherein the electrode composition comprises:
a composite particle, comprising a Si-comprising active material and carbon that is biomass-derived,
wherein the Si-comprising active material exhibits partial vapor pressure below around 10 13 torr at around 400 K.

Assignees

• Sila Nanotechnologies Inc

Inventors

• Yushin Gleb
• Kajdos Adam

Classifications

• Y02E60/10

  Energy storage using batteries · CPC title

• H01M10/0562

  Solid materials · CPC title

• H01G11/56

  Solid electrolytes, e.g. gels; Additives therein · CPC title

• H01G11/06

  with one of the electrodes allowing ions to be reversibly doped thereinto, e.g. lithium ion capacitors [LIC] · CPC title

• H01M10/054

  Accumulators with insertion or intercalation of metals other than lithium, e.g. with magnesium or aluminium · CPC title