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Lithium ion sites and their contribution to the ionic conductivity of RLi2O-B2O3 glasses with R ≤ 1.85
Solid State Ionics ( IF 3.0 ) Pub Date : 2020-12-06 , DOI: 10.1016/j.ssi.2020.115530
Anne Ruckman , Graham Beckler , William Guthrie , Martha Jesuit , Makyla Boyd , Ian Slagle , Robert Wilson , Nathan Barrow , Nagia S. Tagiara , Efstratios I. Kamitsos , Steve Feller , Caio B. Bragatto

The ionic conductivity in lithium borate glasses RLi2O-B2O3 is believed to be related to the number of loose lithium ions, calculated using the topological constraint theory, increasing significantly when 0 ≤ R ≤ 0.5 and reaching a plateau when 0.5 ≤ R ≤ 1.0, and increasing once again when R ≥ 1.0. To test this new proposed approach, high content lithium oxide glasses were prepared (up to R = 1.85) without any signs of heterogeneity by using a fast quenching technique. Results show that instead of being related to the number of loose lithium ions, the ionic conductivity is mostly likely related to the different boron species which act as lithium sites, given that the number of non-bridging oxygens increases proportionally to the lithium to boron ratio when R ≥ 0.5, the region where the plateau in electrical properties is observed.



中文翻译:

锂离子位点以及它们的RLi的离子电导率贡献2 O-B 2个ö 3眼镜ř  ≤1.85

在锂硼酸盐玻璃的RLi离子电导率2 O-B 2 ö 3被认为是相关的松散的锂离子的数目,使用拓扑约束理论计算,显著增加时0≤  [R  ≤0.5和达到平台时0.5≤  [R  ≤ 1.0,并再次增加时- [R  ≥1.0。为了测试这种新提议的方法,准备了高含量的氧化锂玻璃(最高R = 1.85),使用快速淬灭技术没有任何异质迹象。结果表明,与非疏松锂离子的数量无关,离子电导率很可能与充当锂位的不同硼物种有关,因为非桥接氧的数量与锂硼比例成比例地增加当[R  ≥0.5,其中观察在电性能高原的区域。

更新日期:2020-12-07
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