Biomass- derived carbon

Patent metadata

Field	Value
Publication number	US-2024332530-A1
Application number	US-202418740192-A
Country	US
Kind code	A1
Filing date	Jun 11, 2024
Priority date	Sep 14, 2018
Publication date	Oct 3, 2024
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 . A carbon-comprising composite particle for use in Li-ion anodes comprising:
(i) porous carbon derived from nut shells, fruit, or wood, (ii) conversion or alloying-type active material infiltrated into one or more pores of the porous carbon, wherein the conversion or alloying-type active material comprises from about 40 wt. % to about 85 wt. % of the carbon-comprising composite particle.

2 . The carbon-comprising composite particle of claim 1 , wherein the porous carbon comprises from about 90% to about 100% of sp 2 -bonded carbon atoms.

3 . The carbon-comprising composite particle of claim 1 , wherein the porous carbon exhibits electrical conductivity in a range from about 1 S/m to about 10 6 S/m.

4 . The carbon-comprising composite particle of claim 1 , wherein the carbon-comprising composite particle exhibits an average characteristic dimension in a range from around 300 nm to around 30 microns.

5 . The carbon-comprising composite particle of claim 4 , wherein the carbon-comprising composite particle exhibits the average characteristics dimension in a range from around 0.5 micron to around 10 microns.

6 . The carbon-comprising composite particle of claim 1 , wherein, without the conversion or alloying-type active material, the porous carbon 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 an open pore volume in a range from around 0.4 cm 3 /g to around 6 cm 3 /g, as determined by N 2 sorption measurements.

7 . The carbon-comprising composite particle of claim 6 , wherein the open pore volume is in a range from around 0.75 cm 3 /g to around 2.5 cm 3 /g, as determined by N 2 sorption measurements.

8 . The carbon-comprising composite particle of claim 1 , wherein the porous carbon exhibits a compositional purity of more than about 90 wt. %.

9 . The carbon-comprising composite particle of claim 8 , wherein the compositional purity is more than about 96 wt. %.

10 . The carbon-comprising composite particle of claim 1 , wherein the porous carbon comprises less than about 2 wt. % of hydrogen atoms.

11 . The carbon-comprising composite particle of claim 1 , wherein the porous carbon comprises an ash content of less than about 4 wt. %.

12 . The carbon-comprising composite particle of claim 11 , wherein the ash content is less than about 1 wt. %.

13 . The carbon-comprising composite particle of claim 1 , wherein the porous carbon comprises activated carbon.

14 . The carbon-comprising composite particle of claim 1 , wherein the conversion or alloying-type active material comprises alloying-type active material nanoparticles that comprise a non-carbon group IV element with an atomic number of 14.

15 . The carbon-comprising composite particle of claim 14 , wherein the alloying-type active material nanoparticles are infiltrated into the one or more pores via a chemical vapor deposition (CVD).

16 . The carbon-comprising composite particle of claim 14 , wherein an average size of the alloying-type active material nanoparticles ranges from about 2 nm to about 30 nm.

17 . The carbon-comprising composite particle of claim 1 ,
wherein the carbon-comprising composite particle comprises pores, wherein about 75 vol. % to about 100 vol. % of the pores remain sealed and are configured to not be directly accessible by an electrolyte once the carbon-comprising composite particle is part of a Li-ion battery cell.

18 . The carbon-comprising composite particle of claim 1 ,
wherein the carbon-comprising composite particle comprises pores, wherein from about 30 vol. % to about 100 vol. % of the pores exhibit a characteristic dimension in a range from about 0.4 nm to about 15 nm.

19 . The carbon-comprising composite particle of claim 18 , wherein from about 30 vol. % to about 100 vol. % of the pores exhibit the characteristic dimensions in the range from about 0.5 nm to about 10 nm.

20 . The carbon-comprising composite particle of claim 1 ,
wherein the carbon-comprising composite particle comprises sealed pores, wherein a volume fraction of the sealed pores ranges from about 5% to about 100% of a volume required for volume expansion of the conversion or alloying-type active material upon full lithiation.

21 . The carbon-comprising composite particle of claim 1 , wherein a Brunauer-Emmett-Teller (BET) specific surface area (SSA) of the carbon-comprising composite particle ranges from about 0.2 m 2 /g to about 100 m 2 /g.

22 . The carbon-comprising composite particle of claim 1 , wherein the carbon-comprising composite particle comprises a protective surface layer with a thickness from about 0.3 nm to about 60 nm.

23 . The carbon-comprising composite particle of claim 22 , wherein the protective surface layer comprises carbon.

24 . The carbon-comprising composite particle of claim 1 , wherein the porous carbon derived from the fruit.

25 . The carbon-comprising composite particle of claim 24 , wherein the porous carbon derived from olive pits, cherry stones, peach stones, avocado stones, coconut shells, banana fibers or any combination thereof.

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