Electrolyte with dual function salt additive
OwnerMatthijs Holthuijsen, Bihag Anothumakkool +2inventors
InventorsMatthijs Holthuijsen, Bihag Anothumakkool, Freddy Roozeboom, Sandeep Unnikrishnan
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Abstract
The present disclosure relates to an electrolyte product (1), formed as a solid or semi-solid layer, comprising a polymer-based matrix, having dispersed therein an amount of an electrolyte salt composition (4) and an amount of an additive salt composition (5). The disclosure further relates to a method of manufacturing a battery cell product, a battery cell product comprising the electrolyte product, and a battery product comprising a plurality of battery cell products.
Claims23
An electrolyte product (1), suitable for manufacturing a battery cell product, formed as a solid or semi-solid layer (2) comprising a polymer-based matrix (3) having dispersed therein:
- an amount of an electrolyte salt composition (4) having cations of an alkali metal and/or an alkaline earth metal (MI) selected from a group consisting of:
- Na, K, Li, Mg and Cs;
- and
- weakly-coordinating balance anions (XI), and an amount of an additive salt composition (5),
- wherein the additive salt composition (5) comprises:
- cations of a further metal (MII) having a higher reduction potential than (MI);
- and one or more balance anions (XII) different from (XI) and selected to partake in an SEI-forming redox reaction with the alkali metal and/or an alkaline earth metal, and wherein the solid or semi-solid layer (2) is arranged as a multi-layer stack (6), whereby the additive salt composition (5) is confined to, or at least predominantly contained in, an outer layer (7) of the stack (6).
Dependencies are inferred from the claim text.