Sensitive in-operando observation of Li and O transport in thin-film Li-ion batteries
Sensitive in-operando observation of Li and O transport in thin-film Li-ion batteries
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DOI：
10.1016/j.mtener.2021.100844
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发表时间：
2021-09-04
影响因子：
9.3
通讯作者：
Primetzhofer, Daniel
中科院分区：
文献类型：
--
作者：
Mathayan, Vairavel;Morita, Kenji;Primetzhofer, Daniel
薄膜电池通常在阳极、阴极和电解质材料中含有氧化物。能够进行Li和O深度分析的操作中方法与电池研究相关，例如成分的扩散和捕获。在这里，我们展示了基于离子束的分析方法，具有高的深度分辨率和灵敏度的深度剖析锂和O的薄膜电池，使用10兆电子伏的锂和氦离子。在含有8 MeV He离子的电池中，使用符合弹性反冲检测分析和卢瑟福背散射光谱测量进行了Li和O的同时深度分析，并在操作中测量了Li和O的输运。可逆的锂运输观察到从LMO阳极的NbO阴极充电，反之亦然，在放电过程中。在用3.5V第一次充电时观察到O从LMO阳极到NbO阴极的传输，但在电池的进一步充电和放电时未观察到O传输。我们在操作中的测量可以直接和定量观察锂和O的运输过程中的充电-放电循环的薄膜电池。(C)2021作者（S）爱思唯尔有限公司出版
Thin-film batteries often contain oxides in the anode, cathode, and electrolyte materials. In-operando methods capable of Li and O depth profiling are relevant for battery research to study, e.g. diffusion and trapping of constituents. Here, we demonstrate ion beam-based analytical methods with high depth resolution and sensitivity for depth profiling Li and O in thin-film batteries using 10 MeV Li and He ions. Simultaneous depth profiling of Li and O was performed using combined coincidence elastic recoil detection analysis and Rutherford backscattering spectrometry measurements in the battery with 8 MeV He ions, and the Li and O transport was measured in operando. Reversible Li transport was observed from the LMO anode to the NbO cathode on charging and vice versa during discharging. O transport was observed from the LMO anode to the NbO cathode on first charging with 3.5 V but was not observed on further charging and discharging of the battery. Our in-operando measurements allow direct and quantitative observation of Li and O transport during charge-discharge cycles for thin-film batteries. (C) 2021 The Author(s). Published by Elsevier Ltd.