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soft x-ray spectroscopy for probing electronic and chemical states of battery materials

Chinese Physics B 2016年第1期25卷 27-35页

作者：杨万里乔瑞敏 Advanced Light Source Lawrence Berkeley National Laboratory

The formidable challenge of developing high-performance battery system stems from the complication of battery operations, both mechanically and electronically. In the electrodes and at the electrode-electrolyte interfaces, chemical reactions take place with evolving electron states. In addition to the extensive studies of material synthesis, electrochem- ical, structural, and mechanical properties, soft x-ray spectroscopy provides unique opportunities for revealing the critical electron states in batteries. This review discusses some of the recent soft x-ray spectroscopic results on battery binder, transition-metal based positive electrodes, and the solid-electrolyte-interphase. By virtue of soft x-ray＇s sensitivity to electron states, the electronic property, the redox during electrochemical operations, and the chemical species of the interphases could be fingerprinted by soft x-ray spectroscopy. Understanding and innovating battery technologies need a multimodal approach, and soft x-ray spectroscopy is one of the incisive tools to probe the chemical and physical evolutions in batteries.

关键词： soft x-ray spectroscopy batteries solid-electrolyte-interphase electronic structure

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A Perspective on Studying Electronic Structure of Batteries through soft x-ray spectroscopy

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Chinese Journal of Structural Chemistry 2019年第12期38卷 2009-2014页

作者： ZHUO Zeng-Qing PAN Feng YANG Wan-Li School of Advanced Materials Peking UniversityShenzhen Graduate SchoolShenzhen 518055China Advanced Light Source Lawrence Berkeley National Laboratory1 Cyclotron RoadBerkeley CA 94720United States

Understanding electronic structure is crucial to enhance the battery performance. soft x-ray spectroscopy(SxS) is one of the most effective methods to provide direct probe of electronic states. Here, spectroscopic measurements of transition metal 3 d and oxygen 2 p states are simply reviewed. Then, we mainly focus on the perspective of the development direction of modern SxS techniques. Although the true power of recently developed high efficiency mapping of resonant inelastic x-ray scattering(m RIxS) has been apparent for materials and chemistry studies, great challenges remain for mRIxS spectroscopic interpretation, and the understanding of the battery materials on novel redox activities remains elusive.

关键词： electronic structure soft x-ray spectroscopy oxygen redox O-K mRIxS

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