Design and Operation of an Operando Synchrotron Diffraction Cell Enabling Fast Cycling of Battery Materials,Batteries & Supercaps

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Design and Operation of an Operando Synchrotron Diffraction Cell Enabling Fast Cycling of Battery Materials
Batteries & Supercaps ( IF 5.1 ) Pub Date : 2021-07-12 , DOI: 10.1002/batt.202100126
Olof Gustafsson ₁ , Alexander Schökel ₂ , William Robert Brant ₃

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Operation of a battery typically involves dynamic and non-equilibrium processes, making real time operando techniques crucial for understanding their nature. Operando X-ray diffraction is an important technique for investigating metastable intermediates and non-equilibrium phase transitions in crystalline electrode materials. Currently employed experimental setups often apply a disruptive approach to cell design, whereby the integrity of standard electrochemical cells is compromised to facilitate collection of high-quality diffraction data. Here, we present a non-disruptive approach to adapting the use of a standard pouch cell that enables fast and long-term cell cycling. Suitability of the setup is demonstrated on the well-studied cathode material LiNi_0.5Mn_1.5O₄. While exhibiting comparable electrochemical behavior to a standard pouch cell up to a current rate of 8 C (∼6.6 mA cm⁻²), phase transitions could be monitored accurately. Thus, the cell provides a new alternative to investigating non-equilibrium transitions and long-term aging effects in battery materials.

中文翻译：

实现电池材料快速循环的操作数同步加速器衍射电池的设计和运行

电池的操作通常涉及动态和非平衡过程，因此实时操作技术对于了解其性质至关重要。原位X 射线衍射是研究晶体电极材料中亚稳态中间体和非平衡相变的重要技术。目前采用的实验装置通常对电池设计采用破坏性方法，从而损害标准电化学电池的完整性以促进高质量衍射数据的收集。在这里，我们提出了一种无中断的方法来适应标准软包电池的使用，从而实现快速和长期的电池循环。在经过充分研究的正极材料 LiNi _0.5 Mn上证明了该设置的适用性_1.5 O ₄。虽然在高达 8 C (~6.6 mA cm ^-2 )的电流速率下表现出与标准软包电池相当的电化学行为，但可以准确地监测相变。因此，该电池为研究电池材料中的非平衡转变和长期老化效应提供了一种新的选择。

更新日期：2021-07-12

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