蒙脱石对1.5Li2O-P2O5固体电解质电导率的增强作用

Y. Purwamargapratala, A. Z. Syahrial, Teguh Yulius Surya Panca Putra, E. Kartini, H. Jodi
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引用次数: 0

摘要

大多数固体电解质材料还没有显示出足够的导电性来用作电子设备中的电池的电解质。据报道,1.5Li2O和P2O5的混合物显示出比Li3PO4更高的良好导电性,这被认为是由于在制造过程中形成的相混合物。以蒙脱石(MMT)为研究对象,采用常规固相反应法制备了新型1.5Li2O-P2O5-MMT固体电解质复合材料,考察了相混合对其导电性的影响。研究了MMT的加入如何影响1.5Li2O-P2O5-MMT化合物的形成过程,以及它是否影响化合物的电学性能和介电常数。本研究分析了该材料的形态、吸湿性和电化学特性。显微照片中玻璃状薄片的形状减小,并且随着MMT的加入,颗粒块变得更大。添加也倾向于降低吸湿性,如多孔吸收速率降低所示。整个奈奎斯特图只由一个不完美的半圆弧组成,表明材料中只发生了一个弛豫过程。所有电弧的电容表明响应的主要贡献来自大块材料。样品的介电损耗斜率表明,样品中的传导主要以直流传导为主。MMT粘土在固相反应中起到吸收液相的介质作用,增加了主相的形成,从而决定了化合物的总电导率。电导率高于Li4P2O7,其中加入20wt%MMT的样品是最具极化性和最具介电性的化合物。
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The Conductivity Enhancement of 1.5Li2O-P2O5 Solid Electrolytes by Montmorillonite Addition
Most solid electrolyte materials have not shown enough conductivity to be used as an electrolyte for a battery in electronic devices. The mixture of 1.5 Li2O and P2O5 has been reported to show a good conductivity higher than that of Li3PO4, which is thought to be due to phase mixtures that are formed during manufacturing process. Montmorillonite (MMT) was used to explore the effect of phase mixture on conductivity of new 1.5Li2O-P2O5-MMT solid electrolyte composite, which was prepared through conventional solid-state reaction procedures. This study was conducted, how the addition of MMT affects process of forming 1.5Li2O-P2O5-MMT compound, and whether it influences electrical properties and permittivity of compound. Morphology, hygroscopicity, and electrochemical characteristics of this material were analyzed in this study. The shape of glassy-like flakes was reduced in micrographs, and granular lumps were getting larger as MMT was added. Addition also tended to reduce hygroscopicity, as indicated by a reduced rate of porous absorption. Whole Nyquist plot consisted of only one imperfect semicircular arc, indicating only one relaxation process occurred in materials. Capacitance of all arcs indicated main contribution of response was from bulk material. Slope of dielectric loss of samples indicated that conduction in the samples was mainly dominated by dc conduction. MMT clays acted as a medium that absorbed liquid phase in solid-state reaction, increasing formation of dominant phase, which determined total conductivity of compound. Conductivity was higher than that of Li4P2O7, where the sample of 20 wt% MMT addition was most polarizable and most dielectric compound.
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来源期刊
CiteScore
4.50
自引率
16.00%
发文量
83
审稿时长
8 weeks
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