Battery electrode composition comprising biomass-derived carbon

Patent metadata

Field	Value
Publication number	US-2020091517-A1
Application number	US-201916570972-A
Country	US
Kind code	A1
Filing date	Sep 13, 2019
Priority date	Sep 14, 2018
Publication date	Mar 19, 2020
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/cm 2 to around 16 mAh/cm 2 .

First claim

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

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

3 . The electrode composition of claim 1 , wherein an average size of the composite particles ranges from around 600 nm to around 20 microns.

4 . The electrode composition of claim 1 , wherein an average size of the composite particles ranges from around 1 nm to around 60 nm.

5 . 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.

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

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

8 . The electrode composition of claim 6 , wherein at least some pores in the biomass-derived carbon are produced by physical activation, chemical activation, or a combination thereof.

9 . The electrode composition of claim 6 , wherein about 50 to about 100 wt. % of the active material in the composite particles are confined within pores defined in the biomass-derived carbon.

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

11 . The electrode composition of claim 1 , wherein the composite particles additionally comprise carbon that is derived from synthetic polymers or hydrocarbon gases.

12 . The electrode composition of claim 1 , wherein the composite particles further comprise a metal or semimetal.

13 . The electrode composition of claim 12 , wherein the composite particle comprises a metal oxide or semimetal oxide, a metal fluoride or semimetal fluoride, or a combination thereof.

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

15 . The electrode composition of claim 14 ,
wherein the active material is of an intercalation-type or pseudocapacitive, and wherein from around 20 vol. % to around 100 vol. % of pores within the composite particles are configured to remain interconnected and accessible to electrolyte while the electrode composition is made part of the energy storage device cell.

16 . The electrode composition of claim 15 , wherein the composite particles exhibit an average Brunauer-Emmett-Teller (BET) specific surface area (SSA) in the range from about 10 m 2 /g to about 2,000 m 2 /g.

17 . The electrode composition of claim 14 ,
wherein the active material is of a conversion-type, an alloying-type or a metal, and wherein from around 50 vol. % to around 100 vol. % of pores within the composite particles are configured to remain sealed and inaccessible to electrolyte while the electrode composition is made part of the energy storage device cell.

18 . The electrode composition of claim 17 , wherein the energy storage device cell comprises a solid electrolyte.

19 . The electrode composition of claim 1 , wherein energy storage device cell is a Na-ion battery, a Na metal battery, a Li-ion battery or a Li metal battery.

20 . 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.

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

22 . A method of manufacturing an electrode that comprises the electrode composition of claim 1 , comprising:
assembling the electrode from the electrode composition while in a discharged state.

Assignees

• Sila Nanotechnologies Inc

Inventors

• Yushin Gleb
• Kajdos Adam

Classifications

• H01M10/056

  characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes · CPC title

• H01M10/054

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

• H01M10/0525

  Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries · CPC title

• H01M4/625

  Carbon or graphite · CPC title

• H01M4/587 Primary

  for inserting or intercalating light metals · CPC title