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关于离子电荷载流子数密度估计的掺杂碲酸盐锂硅酸盐玻璃的电学和介电弛豫洞察

Insight into Electrical and Dielectric Relaxation of Doped Tellurite Lithium-Silicate Glasses with Regard to Ionic Charge Carrier Number Density Estimation.

作者信息

Rim Young Hoon, Baek Chang Gyu, Yang Yong Suk

机构信息

College of Liberal Arts, Semyung University, Chechon, Chungbuk 27136, Korea.

College of Nanoscience and Nanotechnology, Pusan National University, Busan 46241, Korea.

出版信息

Materials (Basel). 2020 Nov 19;13(22):5232. doi: 10.3390/ma13225232.

DOI:10.3390/ma13225232
PMID:33228113
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7699432/
Abstract

We investigate the role of tellurite on a lithium-silicate glass 0.1 TeO -0.90.1 TeO -0.9 (LiO-2SiO) (LSTO) system proposed for the use in solid electrolyte for lithium ion batteries. The measurements of electrical impedance are performed in the frequency 100 Hz-30 MHz and temperature from 50 to 150 °C. The electrical conductivity of LSTO glass increases compared with that of LiO-2SiO (LSO) glass due to an increase in the number of Li ions. The ionic hopping and relaxation processes in disordered solids are generally explained using Cole-Cole, power law and modulus representations. The power law conductivity analysis, which is driven by the modified Rayleigh equation, presents the estimation of the number of ionic charge carriers explicitly. The estimation counts for direct contribution of about a 14% increase in direct current conductivity in the case of TeO doping. The relaxation process by modulus analysis confirms that the cations are trapped strongly in the potential wells. Both the direct current and alternating current activation energies (0.62-0.67 eV) for conduction in the LSO glass are the same as those in the LSTO glass.

摘要

我们研究了亚碲酸盐在一种拟用于锂离子电池固体电解质的0.1TeO - 0.9(LiO - 2SiO)(LSTO)锂硅酸盐玻璃体系中的作用。在100Hz至30MHz的频率以及50至150°C的温度范围内进行了电阻抗测量。由于锂离子数量的增加，LSTO玻璃的电导率相较于LiO - 2SiO(LSO)玻璃有所提高。无序固体中的离子跳跃和弛豫过程通常使用科尔 - 科尔、幂律和模量表示法来解释。由修正瑞利方程驱动的幂律电导率分析明确给出了离子电荷载流子数量的估计值。在TeO掺杂的情况下，该估计值表明直流电导率直接贡献增加了约14%。通过模量分析得到的弛豫过程证实阳离子被强烈捕获在势阱中。LSO玻璃中传导的直流和交流活化能(0.62 - 0.67eV)与LSTO玻璃中的相同。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6538/7699432/2ac2daf0bb10/materials-13-05232-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6538/7699432/8090b4f07200/materials-13-05232-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6538/7699432/0b22a9c5f102/materials-13-05232-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6538/7699432/35c795da3b0b/materials-13-05232-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6538/7699432/7073b0526bdf/materials-13-05232-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6538/7699432/cc3dfebd06dc/materials-13-05232-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6538/7699432/aa75124c0d82/materials-13-05232-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6538/7699432/2ac2daf0bb10/materials-13-05232-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6538/7699432/8090b4f07200/materials-13-05232-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6538/7699432/0b22a9c5f102/materials-13-05232-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6538/7699432/35c795da3b0b/materials-13-05232-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6538/7699432/7073b0526bdf/materials-13-05232-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6538/7699432/cc3dfebd06dc/materials-13-05232-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6538/7699432/aa75124c0d82/materials-13-05232-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6538/7699432/2ac2daf0bb10/materials-13-05232-g007.jpg

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