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arXiv 2502.03063cond-mat.mtrl-sci
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全固态电池所有组件中晶体结构与取向的原位成像

Operando imaging of crystal structure and orientation in all components of all-solid-state-batteries

Quentin Jacquet, Jacopo Cele, Lara Casiez, Samuel Tardif, Asma Medjaheh, Stephanie Pouget, Manfred Burghammer, Sandrine Lyonnard, Sami Oukassi

AI总结:

本文利用原位同步辐射X射线微衍射成像同时表征全固态电池中LiCoO2正极、Ti集流体和Li金属负极的晶体结构与取向,揭示致密电极中脱锂受富锂绝缘界面限制以及Li金属取向受Ti织构影响并随时间演化。

摘要:

全面理解电池运行过程中正极、电解质、负极和封装之间的相互作用对于提升性能至关重要,但由于缺乏能够同时测量这些组件的表征技术,这一方面仍被忽视。我们利用原位同步辐射X射线微衍射成像对紧凑型全固态电池进行了整体研究。我们实时并同时成像了致密LiCoO2正极、Ti集流体和电沉积Li金属负极的晶格参数与晶体取向。我们揭示了LiCoO2的反应机制依赖于晶体取向,并且在致密电极中(与多孔电极相反),脱锂过程受到富锂绝缘界面形成的限制。研究发现Li金属的晶体取向最初受Ti织构影响,并在电镀和剥离过程中数分钟内发生变化。这些结果证明了X射线成像在非平衡过程中关联反应机制与晶粒取向的能力。

英文摘要:

A comprehensive understanding of interactions between cathode, electrolyte, anode, and packaging during battery operation is crucial for advancing performances but remains overlooked due to the lack of characterisation technics capable of measuring these components simultaneously. We perform a holistic investigation of a compact all-solid-state-battery using operando synchrotron X-ray micro-diffraction imaging. We image in real time and simultaneously the lattice parameter and crystal orientation of the dense LiCoO2 cathode, the Ti current collector and the electrodeposited Li metal anode. We reveal that reaction mechanism of LiCoO2 depends on the crystal orientation, and that, in dense electrodes as opposed to porous ones, the delithiation is limited by the formation of a Li-rich insulating interface. Li metal crystal orientation is found to be influenced initially by the Ti texture and to change within minutes during plating and stripping. These results demonstrate the power of X-ray imaging to link reaction mechanism and grain orientation during non-equilibrium processes.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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