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Gelation reagent for forming gel electrolyte and methods relating thereto

An electrolyte and gelation technology, applied in the direction of electrolyte immobilization/gelation, non-aqueous electrolyte, solid electrolyte, etc., can solve problems such as incompatibility

Pending Publication Date: 2021-07-09
GM GLOBAL TECH OPERATIONS LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, conventional gelation methods are often incompatible with conventional fabrication methods for Li-ion batteries and often require additional fabrication steps

Method used

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  • Gelation reagent for forming gel electrolyte and methods relating thereto
  • Gelation reagent for forming gel electrolyte and methods relating thereto
  • Gelation reagent for forming gel electrolyte and methods relating thereto

Examples

Experimental program
Comparison scheme
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Embodiment I

[0114] Exemplary electrochemical cells were prepared according to various aspects of the present disclosure. For example, a gelling agent comprising ethoxylated trimethylolpropane triacrylate and 2-benzyl-2-(dimethylamino)-4'-morpholinobutyrophenone can be added to a mixture containing salt : lithium hexafluorophosphate (LiPF 6 ) and co-solvents: fluoroethylene carbonate (FEC) and ethylmethyl carbonate (EMC) in the liquid electrolyte. For example, the electrolyte mixture may contain about 5% by weight gelling agent. The electrolyte mixture can be added to an electrochemical cell having a positive electrode comprising NMC622 and a negative electrode comprising lithium metal.

[0115] Exemplary electrochemical cells were prepared according to various aspects of the present disclosure, and can be compared to comparable baseline electrochemical cells in which no gelling agent is present. For example, if figure 2 As shown in , the exemplary electrochemical cell 210 has improve...

Embodiment II

[0117] Another exemplary electrochemical cell was prepared according to various aspects of the present disclosure. For example, a gelling agent comprising ethoxylated trimethylolpropane triacrylate and benzophenone can be added to a salt comprising lithium fluorosulfonyl imide (LiN(FSO 2 ) 2 ) (LiFSI) and solvent: 1,2-dimethoxyethane (DME) in the liquid electrolyte. For example, the electrolyte mixture may contain about 5% by weight gelling agent. The electrolyte mixture can be added to an electrochemical cell having a positive electrode comprising sulfur and a negative electrode comprising lithium metal.

[0118] Exemplary electrochemical cells were prepared according to various aspects of the present disclosure, and can be compared to comparable baseline electrochemical cells in which no gelling agent is present. For example, if image 3 As shown in , the exemplary electrochemical cell 310 has improved capacity retention compared to the baseline electrochemical cell 320....

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Abstract

The invention discloses a gelation reagent for forming gel electrolyte and methods relating thereto. 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 the following formula:.

Description

technical field [0001] The technology relates to gel electrolytes for lithium-ion electrochemical cells and methods of forming the same. Background technique [0002] This section provides background information related to the present disclosure which is not necessarily prior art. [0003] The present technology relates to gel electrolytes for lithium-ion electrochemical cells and methods of forming the same, for example, the method comprising adding one or more gelling agents to an electrochemical cell comprising one or more liquid electrolyte precursors , and the one or more gelling agents comprise one or more initiators and one or more crosslinking agents. [0004] Advanced energy storage devices and systems are required to meet the energy and / or power requirements of a wide variety of products, including automotive products such as start-stop systems (e.g. 12V start-stop systems), battery pack auxiliary systems, hybrid electric vehicles ( "HEV") and electric vehicles (...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F283/06C08F265/08C08F265/06C08F259/08C08F222/20C08F2/48C08K3/32C08K5/43H01M10/0525H01M10/0565
CPCC08F283/06C08F265/08C08F265/06C08F259/08C08F222/103C08F2/48C08K3/32C08K5/43H01M10/0525H01M10/0565H01M2300/0085H01M2300/0082Y02E60/10C08F2810/20C08F122/20
Inventor 戴放陈书如蔡梅
Owner GM GLOBAL TECH OPERATIONS LLC