Lithium ion battery using high surface area nanotubes

Patent metadata

Field	Value
Publication number	US-12583750-B2
Application number	US-202318097877-A
Country	US
Kind code	B2
Filing date	Jan 17, 2023
Priority date	May 22, 2018
Publication date	Mar 24, 2026
Grant date	Mar 24, 2026

Abstract

High-surface area carbon nanotubes having targeted, or selective, oxidation levels and/or content on the interior and exterior of the tube walls are claimed. Such carbon nanotubes can have little to no inner tube surface oxidation, or differing amounts and/or types of oxidation between the tubes' inner and outer surfaces. Additionally, such high-surface area carbon nanotubes may have greater lengths and diameters, creating useful mechanical, electrical, and thermal properties.

First claim

What is claimed:

1 . A composition for use as a binder material, an electrolyte material or a separator film material of an energy storage or collection device, comprising:
a plurality of high-surface area carbon nanotubes, wherein at least a portion of the high-surface area carbon nanotubes are open ended; wherein the plurality of high-surface area nanotubes are single-wall nanotubes and wherein the BET surface area of the plurality of high-surface area nanotubes is from about 1000 m 2 /g to about 2000 m 2 /g according to ASTM D6556-16 and wherein the composition further comprises multi-wall carbon nanotubes wherein the plurality of high-surface area carbon nanotubes have an interior surface oxidized species content which is less than the exterior surface oxidized species content.

2 . The composition of claim 1 , further comprising at least one polymer.

3 . The composition of claim 1 , wherein the carbon nanotubes are further functionalized.

4 . The composition of claim 1 , further comprising at least one dispersion aid.

5 . The composition of claim 4 , wherein the dispersion aid comprises dihydrolevoglucosenone.

6 . The composition of claim 2 , wherein the polymer is selected from the group consisting of vinyl polymers, poly(styrene-butadiene), partially or fully hydrogenated poly(styrene butadiene) containing copolymers, functionalized poly(styrene butadiene) copolymers such as carboxylated poly(styrene butadiene), poly(styrene-isoprene), poly(methacrylic acid), poly(methylmethacrylate), poly(acrylic acid), poly(vinylalcohols), poly(vinylacetates), fluorinated polymers, polyvinylpyrrolidone, conductive polymers, polymers derived from natural sources, polyethers, polyesters, polyurethanes, and polyamides; homopolymers, graft, block or random co- or ter-polymers, and copolymers and mixtures thereof.

7 . The composition of claim 1 , further comprising additional inorganic structures comprising elements of the groups two through fourteen of the Periodic Table of Elements.

8 . The composition of claim 1 , further comprising carbon structures selected from the group consisting of carbon black, graphite, graphene, oxidized graphene, fullerenes, and mixtures thereof.

9 . The composition of claim 1 , further comprising at least a portion of discrete carbon nanotubes.

10 . The composition of claim 1 , wherein the composition has an impedance of less than or equal to about one billion ohm-m.

11 . The composition of claim 1 , wherein the composition has a charge transfer resistance of less than or equal to about 10 million ohm-m.

12 . The composition of claim 1 , which further comprises a cellulose-based polymer or salt thereof.

13 . The composition of claim 12 , wherein the cellulose-based polymer is carboxymethylcellulose or a salt thereof.

14 . The composition of claim 1 , wherein the composition is dry.

15 . The composition of claim 1 , which further comprises a hydrophilic polymer.

16 . The composition of claim 1 wherein the aspect ratio of individual nanotubes is between about 700 and about 1,500.

Assignees

• Molecular Rebar Design Llc

Inventors

• Finlayson Malcolm Francis
• Bosnyak Clive P
• Gazda Jerzy
• Bhat Vinay
• Henderson Nancy
• Cole Emily Barton

Classifications

• H01M4/622

  being polymers · CPC title

• C01B2202/32

  Specific surface area · CPC title

• H01M4/625

  Carbon or graphite · CPC title

• C01B2202/22

  Electronic properties · CPC title

• H01M10/0525

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