Improved lithium ion battery using high surface area nanotubes

A technology with high surface area and carbon nanotubes, which can be used in carbon nanotubes, organic electrolyte batteries, nanocarbons, etc., and can solve problems such as obstacles to the use of carbon nanotubes

Pending Publication Date: 2021-03-19
MOLECULAR REBAR DESIGN LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the utilization of CNTs in these applications has been hampered by the often inability to reliably produce higher surface area CNTs and disperse CNTs in matrices.

Method used

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  • Improved lithium ion battery using high surface area nanotubes
  • Improved lithium ion battery using high surface area nanotubes
  • Improved lithium ion battery using high surface area nanotubes

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0095] Example 1 - Oxidation of Tuball TM (OCSiAl)

[0096] Heat 35g of >64% nitric acid to 95°C. To this acid was added 15 g of pristine multi-walled carbon nanotubes (Tuball TM ). Primitive tubes have the morphology of tightly bundled tree trunks. While maintaining the solution at about 95°C for 5 hours, a mixture of acid and carbon nanotubes was mixed and labeled "oSWCNT-82-2". At the end of the reaction period, oSWCNT 82-2 was filtered to remove acid and washed with reverse osmosis (RO) water to pH 3-4. The resulting CNTs were oxidized to about 3.6% and contained about 4.4% metal residues.

[0097] Variations of this procedure were also performed using slightly different parameters, as shown in Table 1 below:

[0098] Sample oxidized by MAO process: e.g. 35g HNO 3 (65%) / 15g Tuball TM , Oxidation at 95°C.

[0099] 23.33g HNO 3 (65%) + 10.01 g CNTs. T = 95°C. Initial large NOx plume with CNT addition.

[0100] Table 1

[0101] time (h) T(℃) % oxi...

Embodiment 2

[0110] Example 2 - Shear Treatment of Non-Oxidized and Oxidized OCSiAl Tubes

[0111] Example 2A - Shear Treatment of Oxidized OCSiAl Tubes

[0112] Sample volume -1200 mL. Use a 1.5L stainless steel container for rotor / stator (R / S) work.

[0113] Oxidized OCSiAl ~ 0.15%

[0114] Oxidized OCSiAl source: 82-final (pH 3.61, 27.1% solids)

[0115] 1200g X 0.15% = 1.8g dry weight equivalent = 6.64g wet cake. 6.65g wet cake was used.

[0116] Check the viscosity through the rotor stator R / S as shown below.

[0117] T(min) T(℃) comment 0 23 5 31 Clear droplets on the plastic covering the opening of the container. non sticky 9 41 Clear droplets on the plastic covering the opening of the container. non sticky +6.62g wet cake 15 50 Viscous mixture. to cut

[0118] Place in the refrigerator for ~1.5h.

[0119] to cut

[0120]

[0121]

[0122] Sample Designation 180417-MF-1A (0.26% solids), 180417-MF-1B (0.22% so...

Embodiment 2B

[0127] Example 2B - Shear treatment of unmodified OCSiAl

[0128] 600 mL @ 0.4% solids = 2.4 g OCSiAl.

[0129] OCSiAl source: TUBALL TM single-walled carbon nanotubes. Batch No. 01RW01.N1.257 Date of Manufacture: December 20, 2016.

[0130] Rotor / Stator - performed in an 800 mL plastic container in an ice bath.

[0131] t(min) T(℃) comment 0 21 5 48 Higher viscosity than oxidized OCSiAl, 3% 10 65 Place in the refrigerator to cool for 50 minutes before cutting. This brought the temperature to 27°C.

[0132] Cut processing:

[0133]

[0134] Sample 180418-MF-1. 0.34% solids (17 g sample size) - 500 g recovered sample were measured.

[0135] Example 2C - Oxidized OCSiAl / MA14 by shearing device

[0136] MA 14 / oxidized OCSiAl was prepared in a ratio of 80 / 02. This was done to see if we could produce an infant by taking a wet cake of these two components, passing it through the rotor stator, and then shearing. Therefore, after ...

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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.

Description

technical field [0001] The present invention relates to an improved energy storage device comprising novel carbon nanotube compositions and formulations thereof having increased surface area, targeted oxidation level and / or content. Background technique [0002] Many energy storage devices such as batteries, capacitors, and photovoltaic cells can utilize binders and / or electrolytes and separators to provide enhanced mechanical stability properties, improved electrical conductivity of powders used in cathodes or electrodes, and electrical activity or Ion transport in photoactive materials and electrolytes. [0003] Lithium-ion batteries are widely used in portable electronic devices, while batteries such as lithium-ion and lead-acid are increasingly used to provide electrical backup for wind and solar power. Salts used as cathode materials in lithium-ion batteries are generally known to have poor electrical conductivity and poor electrochemical stability, which leads to poor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/158C01B32/159C01B32/17H01M4/62C08K3/04H01M50/431
CPCC01P2006/12H01M4/625C01P2004/03C01P2006/40C01B32/174C08K3/041C08K2201/006C08K3/04C08K3/045C08K3/042H01M10/0525H01M6/16H01M10/06H01M10/30H01M4/621Y02E60/10H01M50/431H01M50/44C08L1/286H01M10/052
Inventor 马尔科姆·弗朗西斯·芬利森克莱夫·P·波斯尼亚克耶日·加兹达维奈·巴特南希·亨德森埃米莉·巴顿·科尔
Owner MOLECULAR REBAR DESIGN LLC
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