Abstract:
Method for producing a dehydrated liquid mixture comprising water in an amount of less than 20 ppm, for use as a solvent for a conducting salt, comprising or consisting of the following steps: —providing or preparing a liquid starting mixture comprising—a total amount of 90% by weight or more, based on the total amount of the liquid starting mixture, of compounds selected from the group of organic carbonates, acetic acid esters of C1 to C8 alcohols and butyric acid esters of C1 to C8 alcohols, wherein the total amount of acetic acid esters of C1 to C8 alcohols and butyric acid esters of C1 to C8 alcohols is in the range of from 0 to 45% by weight, based on the total amount of the liquid starting mixture, —water in a total amount of 3500 ppm to 20 ppm, based on the total amount of the liquid starting mixture, —optionally further constituents, —contacting the liquid starting mixture with an amount of a binderless zeolite molecular sieve such that the water content in the mixture is reduced to an amount of less than 20 ppm, based on the total amount of the dehydrated liquid mixture.
Abstract:
The present invention relates in a first aspect to a method for producing in the interior of a production equipment a dehydrated liquid mixture for use as a solvent for a conducting salt (e.g. LiPF6) wherein after cleaning the equipment with isopropyl alcohol and providing or preparing a liquid starting mixture in said interior of the production equipment both the isopropyl alcohol content in the mixture and the water content in the mixture is reduced by interaction with a zeolite molecular sieve.
Abstract:
The present invention relates to a method for producing a dehydrated liquid mixture for use as a solvent for conducting salts (e.g. LiPF6) wherein the water content is reduced, starting from a liquid starting mixture comprising one, two, three or more organic carbonates in a total amount of 90% by weight or more, based on the total amount of the liquid starting mixture and one, two or more compounds selected from the group consisting of (a) acids with a pKa below 4 and (b) precursors releasing acids with a pKa below 4 in the liquid starting mixture by hydrolysis.
Abstract:
A lithium ion battery comprising (i) at least one anode, (ii) at least one cathode containing a cathode active material selected from lithium ion containing transition metal compounds having a content of Manganese of from 50 to 100 wt.-% based on the total weight of transition metal in the lithium ion containing transition metal compound, and (iii) at least one electrolyte composition containing (A) at least one aprotic organic solvent, (B) at least one compound selected from the group consisting of lithium (bisoxalato) borate, lithium difluoro (oxalato) borate, lithium tetrafluoro (oxalato) phosphate, lithium oxalate, and vinylenecarbonates of formula (I), (C) at least one organic phosphonate or phosphate of general formula (IIa) or (IIb) (D) at least one lithium salt different from compound (B), and (E) optionally at least one further additive
Abstract:
This invention refers to a process of anodic substitution comprising the electrolyzing the liquid reaction medium in an electrochemical cell comprising a cathode and an anode, whereas the liquid reaction medium comprises an organic compound with at least one carbon bound hydrogen atom, a nucleophilic agent, and an ionic liquid in a proportion of at least 10% by weight, and whereas the said hydrogen atoms are replaced at least partially with the nucleophilic group of said nucleophilic agent. Preferably, a gas diffusion layer electrode is used as anode.