Solid polymer electrolyte doped with modified nanofiller and preparation method of solid polymer electrolyte

A solid polymer and nanofiller technology, applied in solid electrolytes, non-aqueous electrolytes, circuits, etc., can solve the problems of difficult thermal motion of polymer segments, limited practical applications, low ionic conductivity, etc., and achieve wide electrochemical stability. Window, promoting segment movement and ionic conduction, effect of high ionic conductivity
CN107342437AActive Publication Date: 2017-11-10BEIJING UNIV OF CHEM TECH
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
BEIJING UNIV OF CHEM TECH
Publication Date
2017-11-10

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Abstract

The invention provides a solid polymer electrolyte doped with modified nanofiller and a preparation method of the solid polymer electrolyte and belongs to the technical field of solid polymer electrolyte materials. The novel solid polymer electrolyte doped with modified nanofiller is prepared by mixing dopamine coated silicon dioxide nanoparticles grafted with polyethylenimine on the surfaces, lithium salt, polyoxyethylene, polyethylenimine and an organic solvent capable of dissolving polyethylene oxide and then drying the mixture for film formation. The preparation method comprises the steps as follows: preparing the dopamine coated silicon dioxide nanoparticles, grafting the particles with polyethylenimine on the surfaces, preparing an electrolyte mixed solution and preparing an electrolyte film. The preparation technology is simple, high in efficiency and low in production cost, and the prepared solid polymer electrolyte for lithium ion batteries has better thermal stability and mechanical strength as well as excellent safety performance and has very bright market prospects.
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Description

technical field

[0001] The invention belongs to the technical field of solid polymer electrolyte materials, and in particular relates to a solid polymer electrolyte mixed with modified nano fillers and a preparation method thereof. Background technique

[0002] Since the 1960s and 1970s, people have been researching and developing lithium-ion batteries. Lithium-ion batteries have the characteristics of high specific energy, high efficiency and long life. These unique properties make lithium-ion batteries the first choice for power sources in the consumer electronics market. However, with the development of lithium-ion battery technology, people continue to deepen research on flexible electronic products, clean energy, electric vehicles, etc., high-performance lithium-ion batteries not only need to store energy efficiently, but also need to be flexible, safe, lightweight quality, durability, etc. The electrolyte, which connects the two electrodes, plays an important role in...

Claims

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