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Polyacrylamide (PAM) solid compound polymer electrolyte and preparation method thereof

A polyacrylamide and composite polymer technology, applied in the field of composite polymer electrolyte component design and preparation, can solve problems such as difficulty of uniform mixing by common methods, and achieve high room temperature conductivity, lithium ion migration number, and good dimensional stability. The effect of avoiding solvent volatilization

Active Publication Date: 2017-01-25
DONGGUAN UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The object of the present invention is to provide a polyacrylamide-based solid composite polymer electrolyte and its preparation method, which overcomes the shortcomings of using solvents to prepare electrolytes in the above-mentioned prior art and the lack of uniform mixing in common methods

Method used

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  • Polyacrylamide (PAM) solid compound polymer electrolyte and preparation method thereof
  • Polyacrylamide (PAM) solid compound polymer electrolyte and preparation method thereof
  • Polyacrylamide (PAM) solid compound polymer electrolyte and preparation method thereof

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Embodiment 1

[0019] The technical solution of the present invention is not limited to the following specific implementation manners.

[0020] Weigh 0.6g LiClO 4 and 0.25g nano Y 2 o 3 , dried in vacuum at 100°C for 24h before use.

[0021] Weigh 4.8g of PEO with a molecular weight of 200,000 in proportion; a molecular weight of 2.4 million is PAM 1.3g; a molecular weight of 2.0×10 4 1.2g of P(AM-co-PEGMA), wherein the mass fraction of PEGMA in P(AM-co-PEGMA) accounts for 70%, and AM accounts for 30%. The above-mentioned polymer matrix was sent to an ultracentrifugal pulverizer, and an ultracentrifuge with a diameter of 99 mm and a 12-tooth rotary knife was selected for pulverization, pulverized for 3 minutes, and passed through a trapezoidal sieve with a pore size of 125 μm, and repeated 3 times. Under the protection of nitrogen atmosphere, the dried LiClO 4 , nano Y 2 o 3 The pulverized polymer matrix is ​​sent to a nitrogen-protected planetary ball mill, and after ball milling for...

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Abstract

The invention relates to the field of materials and belongs to the technical field of preparation of an electrolyte material of a lithium ion battery. The electrolyte is composed of polyoxyethylene (PEO), high molecular weight polyacrylamide (PAM), acrylamide and ethylene glycol monomethyl ether acrylate copolymer (P(AM-co-PEGMA)), lithium salt and nanometer filler. According to the invention, high molecular weight PAM containing a polar group and having an excellent support function is used as a support phase, PEO is used as a transfer phase, P(AM-co-PEGMA) is used as PAM and PEO solubilizers, and the nanometer filler is used as an enhancer and a PEO crystallization inhibitor, so that the electrolyte, with high lithium ion transport number, high ionic conductivity, small interface resistance and good size stability, can be prepared and applied to the lithium ion battery. According to the preparation method provided by the invention, no organic solvent is added; the preparation method belongs to a clean preparation technique; evaporation solvents are prevented from polluting the environment; the resource waste is avoided; the operation is simple and convenient; the preparation cost is low; and the efficiency is high.

Description

technical field [0001] The invention belongs to the technical field of key material design and preparation of lithium ion batteries, solar fuel sensitized batteries and fuel cell materials, and in particular relates to the design and preparation method of a composite polymer electrolyte component, which can be used in lithium ion batteries, solar energy Polymer electrolytes for energy storage devices such as fuel-sensitized cells and fuel cells. Background technique [0002] Since Wright discovered that PEO conducts electricity in the 1970s, after more than 40 years of research, copolymerization, blending, crosslinking, grafting, inorganic fillers, ionic liquids, comb polymers, hyperbranching, dendritic and star polymerization have been used. Various methods such as compound and organic-inorganic hybridization have been used to modify the PEO structure to improve the ionic conductivity, but the room temperature conductivity has not met the application requirements, and the a...

Claims

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Application Information

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IPC IPC(8): H01G9/20H01M10/0565H01M8/1041H01M8/1069
CPCH01G9/2009H01M8/1041H01M8/1069H01M10/0565H01M2300/0082H01M2300/0088Y02E10/542Y02E60/10Y02E60/50
Inventor 焦元启邓丽媚王明兰杨树颜纪传伟
Owner DONGGUAN UNIV OF TECH
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