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Holographic polymer electrolyte and preparation method and application thereof

An electrolyte and polymer technology, applied in the field of lithium-ion battery electrolyte materials, can solve the problems of complex phase structure, lack of channel size adjustment, poor long range, etc., and achieve the effects of improved ionic conductivity, high ionic conductivity and good mechanical properties.

Active Publication Date: 2019-03-19
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In previous reports, the use of microphase separation of polystyrene-polyethylene glycol diblock copolymers can form ion-conducting channels in polyethylene glycol domains (Nano Lett., 2009, 9, 1212-1216), But the correlation between phase morphology and ionic conductivity of block polymers remains unclear
Polyethylene glycol and α-cyclodextrin undergo supramolecular self-assembly (Angew.Chem.Int.Ed.2014,53,3631–3635), and the synthesis of polyethylene glycol polymer electrolytes and mesoporous silica nanoparticles Combining (Chem. Mater. 2017, 29, 4401-4410) can also form nanochannels, but these technologies have many inherent disadvantages, such as poor long-range order, lack of channel size regulation and complex phase structure, which cannot meet the needs of industrial production. needs

Method used

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  • Holographic polymer electrolyte and preparation method and application thereof
  • Holographic polymer electrolyte and preparation method and application thereof
  • Holographic polymer electrolyte and preparation method and application thereof

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preparation example Construction

[0042] The preparation method of the holographic polymer electrolyte in the present invention is that the photoinitiated polymerization inhibitor and lithium salt composed of organic solvent, lithium salt, mixed monomer, photosensitizer and co-initiator and lithium salt are pre-prepared according to a certain ratio. Laser holographic processing The required holographic pre-reaction solution is used to initiate photopolymerization of the system in the optical path of laser holographic processing without adding any external solvent to obtain the target holographic polymer electrolyte. The preparation method of the holographic polymer electrolyte for the lithium ion battery comprises the following steps:

[0043] (1) Add the photoinitiated polymerization inhibitor and lithium salt composed of organic solvent, lithium salt, mixed monomer, photosensitizer and co-initiator into the light-proof sample bottle in sequence, and disperse after stirring for 4-8 hours and ultrasonication fo...

Embodiment 1

[0050]The holographic polymer electrolyte is specifically obtained by polymerizing a mixed monomer / electrolyte composite system through laser holographic processing technology. The organic solvent is composed of ethylene carbonate and propylene carbonate with a mass ratio of 1:1, and the dosage is 50% of the total mass of the organic solvent and the mixed monomer; in the mixed monomer, the molecular weight of polyethylene glycol diacrylate is 400, and Hyperbranched polyester acrylate monoester mass ratio is 2:1; The lithium salt of doping is lithium perchlorate, and consumption is 9% of organic solvent and mixed monomer gross mass; Photosensitizer and co-initiator (N- The amount of phenylglycine) accounts for 0.6% and 1.3% of the total mass of the organic solvent and the mixed monomer respectively.

[0051] The specific preparation method is:

[0052] Add 1.00g of organic solvent, 0.67g of polyethylene glycol diacrylate with a molecular weight of 400, 0.33g of hyperbranched p...

Embodiment 2

[0055] The holographic polymer electrolyte is specifically obtained by polymerizing a mixed monomer / electrolyte composite system through laser holographic processing technology. The organic solvent is composed of ethylene carbonate and propylene carbonate with a mass ratio of 1:1, and the dosage is 40% of the total mass of the organic solvent and the mixed monomer; in the mixed monomer, the molecular weight of polyethylene glycol methyl ether acrylate is 800, and The mass ratio of hyperbranched polyester acrylate monoester is 5:1; the doped lithium salt is lithium bistrifluoromethanesulfonimide, and the dosage is 15% of the total mass of organic solvent and mixed monomer; photosensitizer and co-initiator (p-chlorophenylglycine) account for 0.6% and 1.3% of the total mass of the organic solvent and the mixed monomer respectively.

[0056] The specific preparation method is:

[0057] Add 2.00g of organic solvent, 2.50g of polyethylene glycol methyl ether acrylate with a molecul...

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Abstract

The invention discloses a holographic polymer electrolyte and a preparation method and application thereof. The polymer electrolyte comprises two phase structures which are spaced from each other, andthe two phase structures are separately a light inert region and a light polymer region, wherein the light inert region mainly comprises electrolyte and is used as a lithium ion transmitting channel;and the light polymer region is obtained by photopolymerization on monomers. Key structure compositions and the corresponding components of the polymer electrolyte are adjusted, the integral technological process of the preparation method and reaction conditions and the like of various steps are modified, and correspondingly, the polymer electrolyte with good ion transmission property can be formed. A laser holographic processing technology is preferably adopted and can control distribution characteristics of alternately dark and bright interferometric fringes, and the holographic polymer electrolyte with an ordered structure can be obtained. Compared with the prior art, the holographic polymer electrolyte has the advantages that by a formed long-range ordered ion conduction channel, uncoupling of ion conduction and mechanical strength is realized.

Description

technical field [0001] The invention belongs to the field of lithium-ion battery electrolyte materials, and more specifically relates to a polymer electrolyte and its preparation method and application. The polymer electrolyte is especially a structural holographic polymer electrolyte with long-range order. Background technique [0002] Electrolyte, as a key component of lithium-ion batteries, is very important for the preparation of long-life and high-performance lithium-ion batteries. At present, lithium-ion batteries generally use organic carbonate-based liquid electrolytes, which have potential safety hazards such as easy leakage, flammability and explosion. Compared with liquid electrolytes, polymer electrolytes have better mechanical properties and have advantages in shape design, safety, and cycle life. However, the low ionic conductivity of polymer electrolytes at room temperature limits their commercial application. In order to improve the ion transport performanc...

Claims

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Application Information

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IPC IPC(8): H01M10/0565H01M10/0564H01M10/0525
CPCH01M10/0525H01M10/0564H01M10/0565H01M2300/0082Y02E60/10
Inventor 解孝林余荣华彭海炎薛志刚周炳华周兴平
Owner HUAZHONG UNIV OF SCI & TECH