Revealing In Situ Li Metal Anode Surface Evolution upon Exposure to CO2 Using Ambient Pressure X-Ray Photoelectron Spectroscopy.,ACS Applied Materials & Interfaces

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Revealing In Situ Li Metal Anode Surface Evolution upon Exposure to CO2 Using Ambient Pressure X-Ray Photoelectron Spectroscopy.
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2020-05-19 , DOI: 10.1021/acsami.0c04282
Ane Etxebarria _{1,

2} , Dong-Jin Yun _{3,

4} , Monika Blum _{4,

5} , Yifan Ye _{4,

5,

6} , Meiling Sun ₄ , Kyung-Jae Lee _{4,

7} , Hongyang Su _{4,

8} , Miguel Ángel Muñoz-Márquez ₁ , Philip N Ross ₉ , Ethan J Crumlin _{4,

5}

Affiliation

Centre for Cooperative Research on Alternative Energies (CIC energiGUNE), Basque Research and Technology Alliance (BRTA), Alava Technology Park, Albert Einstein 48, 01510 Vitoria-Gasteiz, Spain.
Departamento de Física de la Materia Condensada, Facultad de Ciencia y Tecnología, Universidad del País Vasco, UPV/EHU, P.O. Box 644, 48080 Bilbao, Spain.
Analytical Engineering Group, Samsung Advanced Institute of Technology, Suwon 440-600, South Korea.
Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, California 94720 United States.
Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States.
Joint Center for Artificial Photosynthesis, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States.
Department of Physics and Photon Science, Gwangju Institute of Science and Technology (GIST), Gwangju 500-712, South Korea.
Hefei National Laboratory for Physical Sciences at the Microscale, Key Laboratory of Strongly-Coupled Quantum Matter Physics of Chinese Academy of Sciences, Key Laboratory of Surface and Interface Chemistry and Energy Catalysis of Anhui Higher Education Institutes, Department of Chemical Physics, University of Science and Technology of China, Hefei, Anhui 230026, P. R. China.
Materials Science Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States.

Because they deliver outstanding energy density, next-generation lithium metal batteries (LMBs) are essential to the advancement of both electric mobility and portable electronic devices. However, the high reactivity of metallic lithium surfaces leads to the low electrochemical performance of many secondary batteries. Besides, Li deposition is not uniform, which has been attributed to the low ionic conductivity of the anode surface. In particular, lithium exposure to CO₂ gas is considered detrimental due to the formation of carbonate on the solid electrolyte interphase (SEI). In this work, we explored the interaction of Li metal with CO₂ gas as a function of time using ambient pressure X-ray photoelectron spectroscopy to clarify the reaction pathway and main intermediates involved in the process during which oxalate formation has been detected. Furthermore, when O₂ gas is part of the surrounding environment with CO₂ gas, the reaction pathway is bypassed to directly promote carbonate as a single product.

中文翻译：

使用环境压力X射线光电子能谱揭示暴露于CO2后原位锂金属阳极表面的演变。

由于它们具有出色的能量密度，因此下一代锂金属电池（LMB）对于电动汽车和便携式电子设备的发展至关重要。然而，金属锂表面的高反应性导致许多二次电池的低电化学性能。此外，Li沉积不均匀，这归因于阳极表面的低离子电导率。特别地，由于在固体电解质界面（SEI）上形成碳酸盐，锂暴露于CO ₂气体被认为是有害的。在这项工作中，我们探索了锂金属与CO ₂的相互作用使用环境压力X射线光电子能谱法分析气体作为时间的函数，以澄清检测到草酸盐形成过程中的反应途径和主要中间体。另外，当O ₂气体与CO ₂气体一起成为周围环境的一部分时，反应路径被旁路以直接促进碳酸盐作为单一产物。

更新日期：2020-05-19

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