Pliable carbonaceous pocket composite structure, method for preparing the same, electrode, including the same, and energy storage device including the electrode

Patent metadata

Field	Value
Publication number	US-10985364-B2
Application number	US-201815937914-A
Country	US
Kind code	B2
Filing date	Mar 28, 2018
Priority date	Feb 28, 2017
Publication date	Apr 20, 2021
Grant date	Apr 20, 2021

Abstract

The present disclosure relates to a pliable carbonaceous pocket composite structure including various particles encapsulated within pliable carbonaceous pockets formed by carbonaceous sheets, a method for preparing the pliable carbonaceous pocket composite structure which enables ultrafast mass production of the pliable carbonaceous pocket composite structure, an electrode including the pliable carbonaceous pocket composite structure, and an energy storage device including the electrode.

First claim

We claim:

1. A pliable carbonaceous pocket composite structure, comprising a composite which includes:
one or more particles wherein the one or more particles include an electrode material; and
a plurality of first carbonaceous pockets formed by a first carbonaceous sheet and a second carbonaceous sheet facing each other,
each of the particles being encapsulated by the first carbonaceous pocket,
wherein the first carbonaceous sheet and the second carbonaceous sheet facing each other contact with each other in a first one or more regions,
wherein the first carbonaceous sheet and the second carbonaceous sheet facing each other do not contact with each other in a second plurality of regions,
wherein each of the second plurality of regions in which the first carbonaceous sheet and the second carbonaceous sheet do not contact with each other forms the first carbonaceous pockets, and
wherein the plurality of the first carbonaceous pockets are formed apart from each other.

2. The pliable carbonaceous pocket composite structure of claim 1 , wherein the first carbonaceous pocket include a closed type pocket, in which the first carbonaceous pocket wholly wraps the surface of the particle encapsulated therein.

3. The pliable carbonaceous pocket composite structure of claim 1 , wherein each of the first carbonaceous sheet and the second carbonaceous sheet has wrinkles.

4. The pliable carbonaceous pocket composite structure of claim 1 , wherein each of the first carbonaceous sheet and the second carbonaceous sheet independently comprises a sheet including graphene, graphite, carbon nanotube, carbon fiber, carbon black, activated carbon, graphene oxide(GO), or reduced graphene oxide(rGO).

5. The pliable carbonaceous pocket composite structure of claim 1 , wherein two or more of the composite contact to each other by mutual contact of the first carbonaceous pockets included in each of the composites.

6. The pliable carbonaceous pocket composite structure of claim 1 , further comprising:
a second carbonaceous pocket encapsulating one or more of the composite.

7. The pliable carbonaceous pocket composite structure of claim 6 , wherein two or more of the pliable carbonaceous pocket composite structures contact to each other by mutual contact of the second carbonaceous pockets included in each of the pliable carbonaceous pocket composite structures.

8. The pliable carbonaceous pocket composite structure of claim 6 , having porosity.

9. The pliable carbonaceous pocket composite structure of claim 6 , wherein the second carbonaceous pocket comprises a plurality of carbonaceous sheets.

10. The pliable carbonaceous pocket composite structure of claim 9 , wherein the second carbonaceous pocket comprises a sheet containing graphene, graphite, carbon nanotube, carbon fiber, carbon black, activated carbon, graphene oxide, or reduced graphene oxide.

11. The pliable carbonaceous pocket composite structure of claim 1 , wherein the one or more particles have semiconductive, conductive, or insulating property.

12. The pliable carbonaceous pocket composite structure of claim 1 , wherein the one or more particles comprise one or more elements selected from the group consisting of Si, Ge, Sn, Cd, Sb, Pb, Bi, Zn, Al, Co, Ni, Ti, Te, Mn, Fe, W, Ag, Au, Pt, V, Cu, Ga, P, and S.

13. The pliable carbonaceous pocket composite structure of claim 1 , wherein the one or more particles have a nanometer-size.

14. The pliable carbonaceous pocket composite structure of claim 1 , wherein a weight ratio of the carbonaceous sheets to the one or more particles is 1:0.001 or more.

15. The pliable carbonaceous pocket composite structure of claim 1 , wherein the pliable carbonaceous pocket composite structure has dispersive property in a solvent.

16. An electrode, comprising the pliable carbonaceous pocket composite structure of claim 1 .

17. The electrode of claim 16 , wherein the electrode is used as an anode or cathode in an energy storage device.

18. An energy storage device, comprising the electrode of claim 16 .

19. The energy storage device of claim 18 , wherein the electrode is used as an anode or cathode in the energy storage device.

20. The energy storage device of claim 19 , wherein the one or more particles comprise one or more elements selected from the group consisting of Si, Ge, Sn, Cd, Sb, Pb, Bi, Zn, Al, Co, Ni, Ti, Te, Mn, Fe, W, Ag, Au, Pt, V, Cu, Ga, and P when the electrode is used as an anode.

21. The energy storage device of claim 19 , wherein the one or more particles comprise S when the electrode is used as cathode.

22. The energy storage device of claim 18 , wherein the energy storage device is a battery, a capacitor, or a battery-capacitor hybrid.

23. The energy storage device of claim 18 , wherein the energy storage device is Li-ion battery, Na-ion battery, Li-air battery, Na-air battery, Li-metal battery, Na-metal battery, Li-ion hybrid capacitor, or Na-ion hybrid capacitor.

24. A method for preparing the pliable carbonaceous pocket composite structure of claim 1 , comprising:
a) forming a layered composite comprising one or more particles, a polymer, and carbonaceous sheets, wherein each of the one or more particles is located between a first carbonaceous sheet and a second carbonaceous sheet facing each other and each of the particles is—bonded to each of the first carbonaceous sheet and the second carbonaceous sheet by the polymer in the layered composite; and
b) removing the polymer from the layered composite to obtain the pliable carbonaceous pocket composite structure which includes the one or more particles, each of the particles being encapsulated by each of the one or more first carbonaceous pockets formed by the first carbonaceous sheet and the second carbonaceous sheet facing each other.

25. The method for preparing a pliable carbonaceous pocket composite structure of claim 24 ,
wherein the polymer in the step (a) is formed by a process which includes adding a monomer for forming the polymer to a solution including the carbonaceous sheets in a solvent and the particles to polymerize so that each of the particles is bonded to each of the first carbonaceous sheet and the second carbonaceous sheet by the polymer.

26. The method for preparing a pliable carbonaceous pocket composite structure of claim 24 ,
wherein the step (b) further includes pulverizing the layered composite prior to removing the polymer so as to form a particulate of the layered composite, and then removing the polymer from the particulate so as to form a second carbonaceous pocket encapsulating one or more of the composites.

27. The method for preparing a pliable carbonaceous pocket composite structure of claim 25 ,
wherein the monomer for forming the polymer in the step (a) comprises an anionic polymerizable monomer.

28. The method for preparing a pliable carbonaceous pocket composite structure of claim 27 , wherein the monomer for forming the polymer comprises a C 1-10 alkyl cyanoacrylate.

29. The method for preparing a pliable carbonaceous pocket composite structure of claim 25 , wherein the solvent in the step (a) is evaporated and removed by heat from the polymerization reaction of the monomer for forming the polymer, or removed after the polymerization reaction, so as to form pores in the composite.

30. The method for preparing a pliable carbonaceou

Assignees

• Korea Advanced Inst Sci & Tech

Inventors

• Kang Jeung Ku
• Won Jong Ho
• Jeong Hyung Mo

Classifications

• H01M4/587

  for inserting or intercalating light metals · CPC title

• H01M4/386

  Silicon or alloys based on silicon · CPC title

• H01M10/0525

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

• Y02T10/70

  Energy storage systems for electromobility, e.g. batteries · CPC title

• H01M4/366 Primary

  as layered products · CPC title