期刊
CARBON
卷 186, 期 -, 页码 724-736出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.carbon.2021.10.049
关键词
Rechargeable batteries; Intercalation; AIF3; HOPG; Graphitic electrode; STM-UHV; XPS; RBS; DFT
资金
- Consejo Nacional de Investigaciones Cientificas y Tecnicas (CONICET) [PIP11220150100124 CO, PIP11220150100675]
- Agencia Nacional de Promocion Cientifica y Tecnologica (ANPCyT) [PICT 2017-4134, PICT2019-4545]
- Universidad Nacional del Litoral (UNL) [CAIthornD 2016-50420150100014LI, CAIthornD 2020-50620190100016LI]
- Agencia Santafesina de Ciencia Tecnologia e Innovacion (ASACTEI), Province of Santa Fe, Argentina [AC-00010-18, 117/14]
This article investigates the effect of adding aluminum fluoride electrolytes on the graphite structure, finding that the reaction is spontaneous and non-reactive, which may contribute to the development of novel quasi-2D devices.
Rechargeable batteries based on graphite are considered as promising alternatives for energy storage applications. The charge/discharge mechanisms of these batteries results from the intercalation and deintercalation driven electrochemically by the atoms or molecules of the electrodes in contact with a liquid electrolyte. These solutions are often complex systems engineered to stabilize and allow the transport of the evolving moieties. In this article, we isolate the effect on the graphite structure of a chemical component of novel electrolytes, the aluminum fluoride (AlF3), by dosing this pure compound in the gas phase over high oriented pyrolitic graphite (HOPG) substrates at 10(-9) mbar and 300 K. We performed an extensive experimental study involving surface characterization and beam analysis techniques, and developed a model of the sorption substantiated in ab-initio calculations. We found a preferential interlaminar absorption when dosing in the direction transversal to the carbon planes. The intercalation in the HOPG is spontaneous and non-reactive, and increases the interplanar spacing by 20%. A charge transfer of 0.65 e(-) per formula from graphite to AlF3 is calculated for the intercalate. Since the absorption depends on the roughness of the substrate we may infer that the intercalation proceeds through the step-edges. These features may contribute to the development of novel quasi-2D devices for special applications. (C) 2021 Published by Elsevier Ltd.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据