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5. V-type electromagnetically induced transparency and saturation effect at the gas-solid interface

Author

Meng, Tengfei, Zhao, Yanting, Ji, Zhonghua, Su, Dianqiang, Xiao, Liantuan, and Jia, Suotang

Subjects
Physics - Atomic Physics
Abstract

We theoretically study electromagnetically induced transparency (EIT) in reflection spectra of V-type system at the gas-solid interface. In addition to a narrow dip arising from the EIT effect, we find the other particular saturation effect induced by pump field, which does not exist in $\Lambda$ or $\Xi$ -type system reflection spectra. The saturation effect only induces an intensity decrement in the reflection spectra, and there is no influence on the narrow dip arising from the EIT effect. We detailedly calculate and analyze the dependence of V-type system reflection spectra on probe field intensity, pump field intensity, coherent decay rate, and the initial population after the collision between atoms and the interface., Comment: 7 pages,7 figures

Published
2015
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9. An Artificial MnWO 4 Cathode Electrolyte Interphase Enabling Enhanced Electrochemical Performance of δ-MnO 2 Cathode for Aqueous Zinc Ion Battery.

Author

Tian, Hao, Zhang, Huanlin, Zuo, You, Ling, Lei, Meng, Tengfei, Zhang, Hang, Sun, Xiaohong, and Cai, Shu

Subjects
ZINC ions, CATHODES, ELECTROLYTES, CYCLIC voltammetry, SERVICE life, CHEMICAL kinetics
Abstract

The dissolution of active material in aqueous batteries can lead to a rapid deterioration in capacity, and the presence of free water can also accelerate the dissolution and trigger some side reactions that affect the service life of aqueous batteries. In this study, a MnWO4 cathode electrolyte interphase (CEI) layer is constructed on a δ-MnO2 cathode by cyclic voltammetry, which is effective in inhibiting the dissolution of Mn and improving the reaction kinetics. As a result, the CEI layer enables the δ-MnO2 cathode to produce a better cycling performance, with the capacity maintained at 98.2% (vs. activated capacity at 500 cycles) after 2000 cycles at 10 A g−1. In comparison, the capacity retention rate is merely 33.4% for pristine samples in the same state, indicating that this MnWO4 CEI layer constructed by using a simple and general electrochemical method can promote the development of MnO2 cathodes for aqueous zinc ion batteries. [ABSTRACT FROM AUTHOR]

Published
2023
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