Electrolytes for fast charging lithium ion batteries having four-carbon chain esters as linear components

Patent metadata

Field	Value
Publication number	US-12009481-B2
Application number	US-202016774003-A
Country	US
Kind code	B2
Filing date	Jan 28, 2020
Priority date	Jan 28, 2020
Publication date	Jun 11, 2024
Grant date	Jun 11, 2024

Abstract

Lithium ion batteries and electrolytes therefor are provided, which include electrolyte additives having dithioester functional group(s) that stabilize the SEI (solid-electrolyte interface) at the surfaces of the anode material particles, and/or stabilize the CEI (cathode electrolyte interface) at the surfaces of the cathode material particles, and/or act as oxygen scavengers to prevent cell degradation. The electrolyte additives having dithioester functional group(s) may function as polymerization controlling and/or chain transfer agents that regulate the level of polymerization of other electrolyte components, such as VC (vinyl carbonate) and improve the formation and operation of the batteries. The lithium ion batteries may have metalloid-based anodes—including mostly Si, Ge and/or Sn as anode active material particles.

First claim

The invention claimed is:

1. An electrolyte solution for a charging of a lithium ion battery at a rate of at least 4 C, comprising:
linear solvent comprising at least one four-carbon chain ester,
cyclic carbonate solvent comprising at least vinyl carbonate (VC) solvent, additives at an amount smaller than 5 wt %, wherein the additives comprise:
a first additive that is represented by tertamilbenzene (t-AmB):

and at least one second additive that comprises at least one of: compound 1a, compound 35, and compound 36; and
at least one lithium salt,
wherein the at least one four-carbon chain ester is represented by the structure of Formula (XVIa), Formula (XVIb) or any combination thereof:

wherein
R 48′ is a C 3 -C 10 alkyl, C 3 -C 20 alkyl or C 3 -C 30 alkyl;
R 49′ is C 4 -C 10 alkyl, C 4 -C 20 alkyl or C 4 -C 30 alkyl;
R 48 is alkyl, haloalkyl, cycloalkyl, aryl, heteroalicyclic, benzyl or heteroaryl;
R 49 is alkyl, haloalkyl, cycloalkyl, aryl, heteroalicyclic, benzyl or heteroaryl;
each of the alkyl, haloalkyl, cycloalkyl, aryl, heteroalicyclic, benzyl or heteroaryl of R 48 , R 48′ , R 49 or R 49′ is optionally substituted with one or more of alkyl, haloalkyl, alkenyl, alkynyl, heteroalicyclic, heteroaryl, O—P(═O)(OR 48 ) 2 , trihalomethyl, cyano, S(═O)—R 48 , S(═O) 2 —R 48 , S(═O) 2 —NR 48 R 49 , halide, cycloalkyl, alkoxy, nitro, NR 48 R 49 , C(O)NR 48 R 49 , N(R 48 )C(═O)—R 49 , hydroxy, alkylthiol, thiol, arylthiol, heteroarylthiol, C(═O)—OR 48 , C(═O)—R 48 , aryl, aryloxy, heteroaryloxy, (CH 2 CH 2 O) n+1 or any combination thereof;

and
n is an integer between 0 and 10.

2. The electrolyte solution of claim 1 , wherein R 48 is a C 3 -C 10 alkyl, C 3 -C 20 alkyl or C 3 -C 30 alkyl.

3. The electrolyte solution of claim 1 , wherein R 49 is a C 4 -C 10 alkyl, C 4 -C 20 alkyl or C 4 -C 30 alkyl.

4. The electrolyte solution of claim 1 , wherein the VC solvent is at 10-30 wt % and the at least one four-carbon chain ester is at 90-70 wt %, respectively.

5. The electrolyte solution of claim 1 , wherein a weight percentage of the at least one four-carbon chain ester is larger than a weight percentage of the cyclic carbonate solvent.

6. A lithium ion battery comprising the electrolyte solution of claim 1 , at least one anode and at least one cathode separated by at least one separator, wherein the anode has anode material based on metalloids comprising at least one of Si, Ge and/or Sn, and the battery is chargeable at least at 4 C.

7. An electrolyte solution for a charging lithium ion battery at a rate of at least 4 C, comprising:
linear solvent comprising at least one four-carbon chain ester,
cyclic carbonate solvent comprising at least vinyl carbonate (VC) solvent,
wherein a weight percentage of the at least one four-carbon chain ester is larger than a weight percentage of the cyclic carbonate solvent,
at least one lithium salt, and
additives that comprise a first additive that is represented by tertamilbenzene (t-AmB):

the structure of Formula (I) or any combination thereof:

wherein:
Z 1 is halide, alkyl, haloalkyl, aryl, alkenyl, alkynyl, cycloalkyl, heteroaryl, heteroalicyclic, hydroxyl, alkoxy, aryloxy, heteroaryloxy, NR 1 R 2 , P(═O)R 1 R 2 , benzyl, thiol, arylthiol, alkylthiol, heteroarylthiol, O(CH 2 ) n C 4 H 4 S, amino pyridine, imidazole, cyclic amine, piperazine, N(CH 2 CH 2 ) 2 N—C(═S)—S—Z 2 , a polymeric moiety or an oligomeric moiety;
Z 2 is alkyl, haloalkyl, benzyl, aryl, cycloalkyl, alkenyl, alkynyl, heteroalicyclic, heteroaryl, a polymeric moiety, CH(P(═O)(OR 1 ) 2 )((C═O)OR 2 ), CH 2 C 6 H 5 , (CH 2 ) n (CO)NR 1 R 2 , (CH 2 ) n COOR 1 , (CH 2 ) n (CO)NH(C 5 H 4 N), (CH 2 ) n SR 1 , (CH 2 ) n S(═O)R 1 , (CH 2 ) n S(═O) 2 R 1 ,

an oligomeric moiety or S—C(═S)—Z 1 ;
R 1 -R 2 are each independently H, alkyl, haloalkyl, cycloalkyl, benzyl, aryl, heteroalicyclic, heteroaryl, polymeric moiety or an oligomeric moiety, wherein if nitrogen (N) is adjacent to R 1 and R 2 then R 1 , R 2 and the adjacent nitrogen may form a heteroaryl or a heteroalicyclic ring;
each of the alkyl, haloalkyl, aryl, benzyl, alkenyl, alkynyl, cycloalkyl, heteroaryl, heteroalicyclic, alkoxy, aryloxy, heteroaryloxy, polymeric moiety, oligomeric moiety arylthiol, alkylthiol or heteroarylthiol of Z 1 , Z 2 , R 1 or R 2 is optionally substituted with one or more of alkyl, haloalkyl, alkenyl, alkynyl, heteroalicyclic, heteroaryl, O—P(═O)(OR 1 ) 2 , trihalomethyl, S(═O)—R 1 , S(═O) 2 —R 1 , S(═O) 2 —NR 1 R 2 , halide, cycloalkyl, alkoxy, nitro, cyano, NR 1 R 2 , C(O)NR 1 R 2 , N(R 1 )C(═O)—R 2 , hydroxy, alkylthiol, thiol, arylthiol, heteroarylthiol, C(═O)—OR 1 , C(═O)—R 1 , aryl, aryloxy, heteroaryloxy, (CH 2 CH 2 O) n+1 or any combination thereof;
wherein the additives comprise at least one second additive out of compound 1a, compound or compound 36

and n is an integer between 0 and 10.

8. The electrolyte solution of claim 7 , wherein the at least one additive is represented by
the structure of Formula (Ia), (Iai) or any combination thereof:

wherein
R 3 and R 3′ are each independently H, alkyl, haloalkyl, alkenyl, alkynyl, cycloalkyl, aryl, heteroalicyclic heteroaryl, alkoxy, hydroxy, O—P(═O)(OR 1 ) 2 , thiol, alkylthiol, aryloxy, heteroaryloxy, arylthiol, heteroarylthiol, nitro, halide, trihalomethyl, cyano, benzyl, C(O)NR 1 R 2 , NR 1 R 2 , N(R 1 )C(═O)—R 2 , C(═O)—OR 1 , S(═O)—R 1 , S(═O) 2 —R 1 or S(═O) 2 —NR 1 R 2 ;
R 4 is H, alkyl, haloalkyl, cycloalkyl, aryl, heteroalicyclic, benzyl or heteroaryl;
each of the alkyl, haloalkyl, cycloalkyl, aryl, benzyl, heteroaryl, alkenyl, alkynyl, heteroalicyclic, alkoxy, alkylthiol, heteroarylthiol, aryloxy, heteroaryloxy or arylthiol of R 1 , R 2 , R 3 , R 3′ or R 4 is optionally substituted with one or more of alkyl, haloalkyl, alkenyl, alkynyl, heteroalicyclic, heteroaryl, O—P(═O)(OR 1 ) 2 , trihalomethyl, cyano, S(═O)—R 1 , S(═O) 2 —R 1 , S(═O) 2 —NR 1 R 2 , halide, cycloalkyl, alkoxy, nitro, NR 1 R 2 , C(O)NR 1 R 2 , N(R 1 )C(═O)—R 2 , hydroxy, alkylthiol, thiol, arylthiol, heteroarylthiol, C(═O)—OR 1 , C(═O)—R 1 , aryl, aryloxy, heteroaryloxy, (CH 2 CH 2 O) n+1 or any combination thereof; and
n is an integer between 0 and 10.

9. The electrolyte solution of claim 7 , comprising 10-30 wt % VC and 90-70 wt % of the at least one four-carbon chain ester, respectively.

10. The electrolyte solution of claim 7 , comprising the compound 1a additive between 0.3-0.9 wt % of the total solvent.

11. The electrolyte solution of claim 7 , comprising the compound 35 additive between 0.3-0.9 wt % of the total solvent.

12. The electrolyte solution of claim 7 , comprising the t-AmB additive between wt % of the total solvent

Assignees

• Storedot Ltd

Inventors

• Kedem Nir
• Amir Liron
• KUKS Evgenia Liel (Jeny)
• Herzog Ido
• Cohen Shirel
• Schwarz Rony
• Sella Eran

Classifications

• H01M10/0567

  characterised by the additives · CPC title

• H01M4/386

  Silicon or alloys based on silicon · CPC title

• H01M4/387

  Tin or alloys based on tin · CPC title

• H01M2300/0051

  Carbonates · CPC title

• H01M10/0525 Primary

  Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries · CPC title