Effect of interaction in allophane/PEO/LiClO<sub>4</sub> composite solid polymer electrolyte on crystallization of PEO
In order to solve the safety problems in the lithium ion batteries used nowadays,the researchers were increasingly attracted by the solid electrolytes. Allophane was prepared from Na<sub>2</sub>SiO<sub>3</sub> and AlCl<sub>3</sub>·6H<sub>2</sub>O by so...
Main Authors: | , , , , , |
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Format: | Article |
Language: | zho |
Published: |
Journal of Materials Engineering
2021-01-01
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Series: | Journal of Materials Engineering |
Subjects: | |
Online Access: | http://jme.biam.ac.cn/CN/10.11868/j.issn.1001-4381.2020.000174 |
Summary: | In order to solve the safety problems in the lithium ion batteries used nowadays,the researchers were increasingly attracted by the solid electrolytes. Allophane was prepared from Na<sub>2</sub>SiO<sub>3</sub> and AlCl<sub>3</sub>·6H<sub>2</sub>O by sol-gel method. By mixing the allophane and the polyethylene oxide/lithium perchlorate(PEO/LiClO<sub>4</sub>)with the solution blending method,the composite solid polymer electrolyte was obtained. X-ray diffraction(XRD),fourier transform infrared spectroscopy(FTIR),differential scanning calorimetry(DSC),transmission electron microscope(TEM),scanning electron microscope(SEM)and optical microscopy(OM)were used to characterize the microstructure and morphology of the samples. The results show that the noncovalent bonding interactions(complexation,hydrogen bonding,and Lewis acid-base interaction)among allophane,LiClO<sub>4</sub> and PEO significantly inhibit the crystallization of PEO. The crystallinity of PEO decreases and then increases with the increase of allophone content. Moreover,the crystallinity of PEO decrease with the increase of LiClO<sub>4</sub> content. When EO/Li<sup>+</sup> molar ratio is 10:1 and the content of allophane is 5%(mass fraction),the crystallinity of PEO in the solid polymer electrolyte is only 4.12%. |
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ISSN: | 1001-4381 1001-4381 |