Gelation reagent for forming gel electrolyte and methods relating thereto
AssigneeGM Global Technology Operations LLC
InventorsFang Dai, Shuru Chen, Mei Cai
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Abstract
The present technology relates to gel electrolytes for using in lithium-ion electrochemical cells and methods of forming the same. For example, the method may include adding one or more gelation reagents to an electrochemical cell including one or more liquid electrolyte precursors. The one or more gelation reagents include one or more initiators and one or more crosslinking agents. Each of the one or more initiators may be one of a thermal initiator and an actinic/electron beam initiator. Each of the one or more crosslinking agents may be one of a tridentate alkane and a tetradentate alkane having one or more substitutes including a terminal group represented by:
Claims20
A method of preparing a gel polymer electrolyte for use in an electrochemical cell that cycles lithium ions, wherein the method comprises:
- adding a gelation reagent to a liquid electrolyte to form an electrolyte mixture that defines the gel polymer electrolyte, wherein the gelation reagent includes one or more initiators and one or more crosslinking agents, the one or more initiators comprising a thermal initiator selected from the group consisting of:
- azobisisobutyronitrile (AIBN), 1,1′-azobis(cyclohexanecarbonitrile) (ABCN), benzoyl peroxide (BPO), di-tert-butyl peroxide, and combinations thereof, each of the one or more crosslinking agents is one of a tridentate alkane and a tetradentate alkane having one or more substitutes including a terminal group represented by:
A method of preparing a gel polymer electrolyte for an electrochemical cell that cycles lithium ions, wherein the method comprises:
- contacting a gelation reagent and a liquid electrolyte to form an electrolyte precursor, wherein the gelation reagent includes one or more initiators and one or more crosslinking agents, the one or more initiators comprising a thermal initiator selected from the group consisting of:
- azobisisobutyronitrile (AIBN), 1,1′-azobis(cyclohexanecarbonitrile) (ABCN), benzoyl peroxide (BPO), di-tert-butyl peroxide, and combinations thereof, and each of the one or more crosslinking agents is one of a tridentate alkane and a tetradentate alkane having one or more substitutes including a terminal group represented by:
- introducing the electrolyte precursor into the electrochemical cell;
- and
- curing the electrolyte precursor to form the gel polymer electrolyte.
A method of preparing a gel polymer electrolyte for use in an electrochemical cell that cycles lithium ions, wherein the method comprises:
- adding a gelation reagent to a liquid electrolyte to form an electrolyte mixture that defines the gel polymer electrolyte, the gelation reagent comprising one or more initiators and one or more crosslinking agents, each of the one or more initiators being one of a thermal initiator and an actinic/electron beam initiator, each of the one or more crosslinking agents being one of a tridentate alkane and a tetradentate alkane having one or more substitutes including a terminal group represented by:
- and the liquid electrolyte comprising one or more lithium salts selected from the group consisting of:
- lithium hexafluorophosphate (LiPF6);
- lithium perchlorate (LiClO4), lithium tetrachloroaluminate (LiAlCl4), lithium iodide (LiI), lithium bromide (LiBr), lithium thiocyanate (LiSCN), lithium tetrafluoroborate (LiBF4), lithium difluorooxalatoborate (LiBF2(C2O4)) (LiODFB), lithium tetraphenylborate (LiB(C6H5)4), lithium bis-(oxalate)borate (LiB(C2O4)2) (LiBOB), lithium tetrafluorooxalatophosphate (LiPF4(C2O4)) (LiFOP), lithium nitrate (LiNO3), lithium hexafluoroarsenate (LiAsF6), lithium trifluoromethanesulfonate (LiCF3SO3), lithium bis(trifluoromethanesulfonimide) (LiTFSI) (LiN(CF3SO2)2), lithium fluorosulfonylimide (LiN(FSO2)2) (LiFSI), lithium fluoroalkylphosphate (LiFAP) (Li3O4P), and combinations thereof, and one or more solvents selected from the group consisting of:
- ethylene carbonate (EC), propylene carbonate (PC), butylene carbonate (BC), fluoroethylene carbonate (FEC), dimethyl carbonate (DMC), diethyl carbonate (DEC), ethyl methyl carbonate (EMC), methyl formate, methyl acetate, methyl propionate, γ-butyrolactone, γ-valerolactone, 1,2-dimethoxyethane (DME), 1-2-diethoxyethane, ethoxymethoxyethane, tetrahydrofuran, 2-methyltetrahydrofuran, 1,3-dioxolane (DOL), sulfolane, and combinations thereof.
Dependencies are inferred from the claim text.