https://scholars.lib.ntu.edu.tw/handle/123456789/403280
標題: | Voltammetric Enhancement of Li-Ion Conduction in Al-Doped Li7–xLa3Zr2O12 Solid Electrolyte | 作者: | Yu-Ting Chen Anirudha Jena Wei Kong Pang Vanessa K. Peterson Hwo-Shuenn Sheu Ho Chang RU-SHI LIU |
公開日期: | 2017 | 出版社: | American Chemical Society ({ACS}) | 來源出版物: | The Journal of Physical Chemistry C | 摘要: | Al-doped Li7-xLa3Zr2O12 is found to be more ionically conductive following voltammetric treatment in an all-solid-state Li|Li7-xLa3Zr2O12|Li cell configuration. This result is consistent with electrical impedance spectroscopy measurements, which reveal that the activation energy for lithium diffusion is reduced from 0.32 to 0.26 eV following voltammetric treatment. The Li deposition-dissolution signal has been observed in the voltammograms, and neutron powder diffraction shows an increase in the lithium content of the Li7-xLa3Zr2O12. Furthermore, X-ray photoelectron spectroscopy indicates a local rearrangement of O, resulting in a reduction of defects following voltammetric treatment, with the enhanced conductivity attributable to both the reduction of defect oxygen and increased lithium content. This work, therefore, reveals such voltammetric treatment as a simple and inexpensive alternative to existing doping approaches to boost the electrochemical performance of Li7-xLa3Zr2O12. The findings can improve the future development of all-solid-state Li-ion batteries. On the other hand, our approach to understanding the conductivity enhancement via voltammetric treatment may provide a better alteration in the ionic conduction of solid electrolytes during solid-state battery operation. (Graph Presented). © 2017 American Chemical Society. |
URI: | https://scholars.lib.ntu.edu.tw/handle/123456789/403280 | DOI: | 10.1021/acs.jpcc.7b04004 | SDG/關鍵字: | Activation energy; Aluminum; Defects; Electric batteries; Electrolytes; Ionic conduction in solids; Lithium; Lithium compounds; Lithium-ion batteries; Reduction; Voltammetry; X ray photoelectron spectroscopy; Cell configurations; Conductivity enhancement; Electrical impedance spectroscopy; Electrochemical performance; Enhanced conductivity; Lithium diffusion; Local rearrangement; Solid state batteries; Solid electrolytes |
顯示於: | 化學系 |
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