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Printed lithium foil and film

A technology of lithium metal powder and substrate, applied in the field of substrates coated with a printable lithium composition, can solve problems such as loss of capacity

Pending Publication Date: 2021-11-05
LIVENT USA CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Thus, after an initial charge of a Li-ion battery, the Li-ion battery loses from about 10% to more than 20% of its capacity

Method used

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  • Printed lithium foil and film
  • Printed lithium foil and film
  • Printed lithium foil and film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0082] 10 g of styrene-butadiene rubber solution (S-SBR Europrene Sol R 72613) was dissolved in 90 g of toluene (99% anhydrous, Sigma Aldrich) by stirring at 21° C. for 12 hours. 6 g of 10 wt% styrene-butadiene rubber (polymer binder) in toluene (solvent) was mixed with 0.1 g of carbon black (Timcal Super P) (rheology modifier) ​​and 16 g of toluene, and mixed in a Thinky ARE 250 Disperse in a planetary mixer at 2000 rpm for 6 minutes. 9.3 g of stabilized lithium metal powder ( FMC Lithium Corp.) was added to the suspension and dispersed in a Thinky mixer at 1000 rpm for 3 minutes. The printable lithium suspension was then filtered through a stainless steel mesh with 180 μm openings. The printable lithium suspension was then blade coated onto the copper current collector at a wet thickness of 2 mils (-50 μm) and a dry thickness of approximately 25 μm before lamination. Figure 4 is a graph showing the cycle performance of a pouch cell with a printable lithium-derived thin ...

Embodiment 2

[0084] 10 g of ethylene propylene diene terpolymer (EPDM) with a molecular weight of 135,000 (Dow Nordel IP 4725P) were dissolved in 90 g of p-xylene (99% anhydrous, Sigma Aldrich) by stirring at 21° C. for 12 hours. 6 g of 10 wt % EPDM (polymer binder) in p-xylene (solvent) was mixed with 0.1 g TiO 2(Evonik Industries) (rheology modifier) ​​and 16 g of toluene were combined and dispersed in a Thinky ARE 250 planetary mixer at 2000 rpm for 6 minutes. 9.3 g of stabilized lithium metal powder ( FMCLithium Corp.) was added to the suspension and dispersed in a Thinky mixer at 1000 rpm for 3 minutes. The printable lithium was then filtered through a stainless steel mesh with 180 μm openings. The printable lithium composition was then blade coated onto the copper current collector at a wet thickness of 2 mils (~50 μm) and a dry thickness of approximately 25 μm prior to lamination.

Embodiment 3

[0085] Example 3 - Printed foil with carbon nanotubes

[0086] 1.5 g of 1.27M molecular weight polyisobutylene (PIB) was dissolved in toluene by stirring at 21°C for 12 hours. 30 g of stabilized lithium metal powder ( FMCLithium Corp.) was added to the suspension and dispersed in a Thinky mixer at 1000 rpm for 3 minutes. The printable lithium suspension was then filtered through a stainless steel mesh with 180 μm openings. The printable lithium composition was then blade coated onto the copper current collector at a wet thickness of 2 mils (~50 μm) and a dry thickness of approximately 25 μm prior to lamination.

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Abstract

A substrate coated with a printable lithium composition is provided. The printable lithium composition includes lithium metal powder; a polymer binder, wherein the polymer binder is compatible with the lithium powder; and a rheology modifier compatible with the lithium powder and the polymer binder, wherein the rheology modifier is dispersible within the composition and provides a three-dimensional support structure for further improvement of the electrochemical performance of the electrode when coated with the composition. The substrate may be incorporated into a battery. In one embodiment, the battery comprises a cathode, an electrolyte and an anode, wherein the cathode, the electrolyte, the separator, the anode, or a combination thereof may each comprise a substrate coated with a printable lithium composition.

Description

[0001] related application [0002] The following applications claim U.S. Provisional Application No. 62 / 874,269 filed July 15, 2019, U.S. Provisional Application No. 62 / 864,739 filed June 21, 2019, and claim U.S. Application No. 62 / 864,739 filed March 20, 2019 International Application No. PCT, filed March 21, 2019, priority to Provisional Application No. 62 / 646,521, filed March 22, 2018, of Nos. 16 / 359,707, 16 / 359,725, and 16 / 359,733 / US19 / 23376, PCT / US19 / 23383, and PCT / US19 / 23390, and the priority of U.S. Provisional Application No. 62 / 691,819, filed June 29, 2018, the disclosures of each of which are hereby incorporated by reference in their entirety incorporated. [0003] field of invention [0004] The present invention relates to a substrate coated with a printable lithium composition suitable for use in a variety of energy storage devices, including batteries and capacitors. Background technique [0005] Lithium and lithium-ion secondary or rechargeable batteries ha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/38H01M4/04H01M4/62H01M4/36H01M4/587
CPCH01M4/134H01M4/622H01M4/625H01M4/382H01M4/0409H01M4/0404Y02E60/10H01M4/1395H01M10/052H01M2300/0068H01M2300/0082
Inventor M·雅科夫列娃K·B·菲奇W·A·格里特尔J·夏
Owner LIVENT USA CORP
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