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Pyridine sulfur trioxide complexes as electrolyte component for high voltage batteries

專(zhuān)利號(hào)
US11177505B2
公開(kāi)日期
2021-11-16
申請(qǐng)人
BASF SE; University of Rhode Island Board of Trustees（DE Ludwigshafen am Rhein）
發(fā)明人
Frederick Francois Chesneau; Arnd Garsuch; Michael Schmidt; Brett Lucht; Julien Demeaux; Yingnan Dong; Bo Zhang
IPC分類(lèi)
H01M10/0567; H01M10/0525; H01M10/0568; H01M10/0569
技術(shù)領(lǐng)域
so3,lithium,pyridine,c10,carbonate,alkyl,cyclic,or,selected,wt
地域： Ludwigshafen am Rhein

摘要

An electrolyte composition including (i) at least one aprotic organic solvent; (ii) at least one conducting salt; (iii) at least one pyridine-SO3 complex of formula (I) wherein R is selected independently at each occurrence from F, C1 to C10 alkyl, C2 to C10 alkenyl, and C2 to C10 alkynyl, wherein alkyl, alkenyl, and alkynyl may be substituted by one or more substituents selected from F and CN; and n is an integer selected from 1, 2, 3, 4, and 5; and (vi) optionally one or more additives; and its use in electrochemical cells.

說(shuō)明書(shū)

CROSS-REFERENCE TO RELATED APPLICATION(S)

This application is a national stage entry of PCT Application No. PCT/EP2018/050067 filed on Jan. 2, 2018, the contents of which are incorporated by reference herein in its entirety.

FIELD

The present invention relates to the use of pyridine sulfur trioxide complexes of formula (I)

embedded image

wherein R and n are defined as below,

in electrolyte compositions, to electrolyte compositions containing at least one pyridine sulfur trioxide complex of formula (I) for electrochemical cells and to electrochemical cells comprising such electrolyte composition.

BACKGROUND

Storing electrical energy is a subject of still growing interest. Efficient storage of electric energy allows electric energy to be generated when it is advantageous and to be used when needed. Secondary electrochemical cells are well suited for this purpose due to their reversible conversion of chemical energy into electrical energy and vice versa (rechargeability). Secondary lithium batteries are of special interest for energy storage since they provide high energy density and specific energy due to the small atomic weight of the lithium ion, and the high cell voltages that can be obtained (typically 3 to 5 V) in comparison with other battery systems. For that reason, these systems have become widely used as a power source for many portable electronics such as cellular phones, laptop computers, mini-cameras, etc.

權(quán)利要求

1
What is claimed is:1. An electrolyte composition, comprising:(i) at least one aprotic organic solvent;(ii) at least one conducting salt; and(iii) at least one pyridine-SO3 complex of formula (I)embedded imagewhereinR is selected independently at each occurrence from F, C1 to C10 alkyl, C2 to C10 alkenyl, and C2 to C10 alkynyl, wherein alkyl, alkenyl, and alkynyl may be substituted by one or more substituents selected from F and CN; andn is an integer selected from 1, 2, 3, 4, and 5.2. The electrolyte composition of claim 1, wherein the electrolyte composition comprises 0.01 to 5 wt.-% of the at least one pyridine-SO3 complex of formula (I), based on a total weight of the electrolyte composition.3. The electrolyte composition of claim 1, wherein at least one R is F.4. The electrolyte composition of claim 1, wherein n is 1 or 2.5. The electrolyte composition of claim 1, wherein at least one R is selected from C2 to C10 alkenyl which may be substituted by one or more substituents selected from F and CN.6. The electrolyte composition of claim 1, wherein at least one R is selected from C2 to C10 alkynyl which may be substituted by one or more substituents selected from F and CN.7. The electrolyte composition of claim 1, wherein at least one R is selected from C1 to C10 alkyl which may be substituted by one or more substituents selected from F and CN.8. The electrolyte composition of claim 1, wherein the at least one pyridine-SO3 complex of formula (I) is selected from 2-vinyl pyridine sulfur trioxide, 3-vinyl pyridine sulfur trioxide, 4-vinyl pyridine sulfur trioxide, 2-trifluoromethyl pyridine sulfur trioxide, 3-trifluoromethyl pyridine sulfur trioxide, 4-trifluoromethyl pyridine sulfur trioxide, 2-fluoro pyridine sulfur trioxide, 3-fluoro pyridine sulfur trioxide, 4-fluoro pyridine sulfur trioxide, 2-propargyl pyridine sulfur trioxide, 3-propargyl pyridine sulfur trioxide, 4-propargyl pyridine sulfur trioxide, and mixtures thereof.9. The electrolyte composition of claim 1, wherein the at least one aprotic organic solvent (i) is selected from optionally fluorinated cyclic and acyclic organic carbonates, optionally fluorinated acyclic ethers and polyethers, optionally fluorinated cyclic ethers, optionally fluorinated cyclic and acyclic acetales and ketales, optionally fluorinated orthocarboxylic acids esters, optionally fluorinated cyclic and acyclic esters and diesters of carboxylic acids, optionally fluorinated cyclic and acyclic sulfones, optionally fluorinated cyclic and acyclic nitriles and dinitriles, optionally fluorinated cyclic and acyclic phosphates, and mixtures thereof.10. The electrolyte composition of claim 1, wherein the at least one aprotic organic solvent (i) is selected from optionally fluorinated C1-C10-alkylethers, optionally fluorinated cyclic and acyclic organic carbonates, and mixtures thereof.11. The electrolyte composition of claim 1, wherein the at least one conducting salt (ii) is selected from lithium salts.12. The electrolyte composition of claim 1, wherein the electrolyte composition further comprises at least one additive (iv) selected from the group consisting of film forming additives, flame retardants, overcharging additives, wetting agents, HF and/or H2O scavengers, stabilizers for LiPF6 salt, ionic solvation enhancers, corrosion inhibitors, and gelling agents.13. An electrochemical cell comprising:an anode comprising an anode film; anda cathode comprising a cathode film,wherein the anode film and the cathode film each independently comprise the electrolyte composition of claim 1.14. An electrochemical cell, comprising:an anode comprising a film forming additive; anda cathode comprising the film forming additive,wherein the film forming additive comprises a pyridine-SO3 complex of formula (I)embedded imagewhereinR is selected independently at each occurrence from F, C1 to C10 alkyl, C2 to C10 alkenyl, and C2 to C10 alkynyl, wherein alkyl, alkenyl, and alkynyl may be substituted by one or more substituents selected from F and CN; andn is an integer selected from 1, 2, 3, 4, and 5.
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