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Lithium electrodes for lithium-sulphur batteries

An electrode and lithium layer technology, applied in the field of manufacturing lithium-sulfur batteries, can solve the problem of no lasting effect on charging efficiency, and achieve the effect of continuous and uniform thin film

Inactive Publication Date: 2017-08-01
RHODIA OPERATIONS SAS +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Unfortunately, LiNO 3 is consumed during SEI formation on Li and thus has no lasting impact on charging efficiency upon cycling due to the formation of Li dendrites

Method used

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  • Lithium electrodes for lithium-sulphur batteries
  • Lithium electrodes for lithium-sulphur batteries
  • Lithium electrodes for lithium-sulphur batteries

Examples

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no. 1 example

[0036] According to a first embodiment of the invention, the method for manufacturing an electrode comprises:

[0037] (i-1) providing a current collector comprising at least one lithium layer;

[0038] (ii-1) providing a composition (C) as defined above;

[0039] (iii-1) applying the composition (C) provided in step (ii-1) to the at least one lithium layer of the current collector provided in step (i-1), thereby providing a film; and

[0040] (iv-1) drying the film provided in the step (iii-1).

[0041] The electrodes obtainable by the method according to this first embodiment of the invention are advantageously electrodes of the invention.

[0042] In step (i-1) of the method according to this first embodiment of the invention, the current collector typically comprises:

[0043] - at least one metal layer, and

[0044] - At least one lithium layer adhered to said at least one metal layer.

[0045] In step (i-1) of the method according to this first embodiment of the inv...

no. 2 example

[0047] According to a second embodiment of the invention, the method for manufacturing an electrode comprises:

[0048] (i-2) providing a current collector comprising at least one lithium layer;

[0049] (ii-2) providing a film obtainable by a method comprising:

[0050] (i) providing a composition (C) as defined above;

[0051] (ii) processing the composition (C) provided in step (i) into a film; and

[0052] (iii) drying the film provided in step (ii); and

[0053](iii-2) Applying the thin film provided in step (ii-2) to the at least one lithium layer of the current collector provided in step (i-2).

[0054] The electrodes obtainable by the method according to this second embodiment of the invention are advantageously electrodes of the invention.

[0055] In step (i-2) of the method according to this second embodiment of the invention, the current collector typically comprises:

[0056] - at least one metal layer, and

[0057] - At least one lithium layer adhered to sa...

no. 3 example

[0060] According to a third embodiment of the invention, the method for manufacturing an electrode comprises:

[0061] (i-3) providing a film obtainable by a method comprising:

[0062] (i) providing a composition (C) as defined above;

[0063] (ii) processing the composition (C) provided in step (i) into a film; and

[0064] (iii) drying the film provided in step (ii);

[0065] (ii-3) depositing at least one lithium layer onto the film provided in step (i-3); and

[0066] (iii-3) Optionally, applying at least one metal layer to the at least one lithium layer provided in step (ii-3).

[0067] The electrodes obtainable by the method according to this third embodiment of the invention are advantageously electrodes of the invention.

[0068] In step (iii-3) of the method according to this third embodiment of the invention, the metal layer, if present, preferably consists of a metal selected from the group consisting of copper and stainless steel.

[0069] In step (iii-3) of ...

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Abstract

The present invention pertains to a process for manufacturing a film, said process comprising: (i) providing a composition [composition (C)] comprising, preferably consisting of: - at least one fluoropolymer [polymer (F)] comprising recurring units derived from at least one fluorinated monomer comprising a -SO 3 M functional group, wherein M is an alkaline metal [monomer (FM)] and - a liquid medium [medium (L)] comprising at least 50% by weight, based on the total weight of said medium (L), of at least one alkyl carbonate; (ii) processing the composition (C) provided in step (i) into a film; and (iii) drying the film provided in step (ii). The present invention further pertains to use of said film in a process for manufacturing a lithium electrode and to use of said lithium electrode in a process for manufacturing a lithium-sulphur battery.

Description

[0001] Cross References to Related Applications [0002] This application claims priority from European Application No. 14306878.1 filed on November 25, 2014, the entire content of which is hereby incorporated by reference for all purposes. technical field [0003] The invention relates to a method for producing a thin film, the use of the thin film in a method for producing a lithium electrode and the use of the lithium electrode in a method for producing a lithium-sulfur battery. Background technique [0004] Sulfur is abundant, cheap and non-toxic. Rechargeable lithium-sulfur (Li-S) batteries are expected to deliver theoretical energy densities of up to 2600 Wh / kg, suitable for electric vehicles with charge autonomy of 500 km or more. However, the commercialization of these batteries is hampered by unresolved technical issues related to the insulating properties of sulfur and the high solubility of lithium polysulfides in the electrolyte. Different strategies have been ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/1395H01M2/16H01M4/134H01M4/36H01M4/62H01M10/052H01M10/42H01M2/14H01M4/38H01M4/58H01M50/417
CPCH01M4/134H01M4/1395H01M4/366H01M4/62H01M10/052H01M10/4235H01M4/581H01M4/382H01M50/46H01M50/417C08J5/2237C08J2327/12Y02E60/10Y02P70/50C08F2/00H01M10/0568H01M4/661H01M4/667H01M50/409H01M4/137H01M4/38H01M4/58H01M10/0525H01M10/42
Inventor S.R.佩特里西L.梅洛C.巴尔查斯
Owner RHODIA OPERATIONS SAS
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