journal article·2024-10-11

Single O Hole Enables High Cycling Performance by Removing Thermodynamic and Kinetic Limitations

Yande Li, Shun Zheng, Jingyi Xie, Lifu Shen, Ji Li, Jianwei Meng, Nian Zhang, Qinghao Li, Tsu-Chien Weng, Xiaosong Liu, Pengfei Yu

ACS Energy Letters· Volume 9· Issue 10
Publisher page

Abstract

Lithium-rich layered oxides involving both transition metal and oxygen redox have received widespread attention due to their high energy density. However, the participation of oxygen redox in charge compensation generally leads to significant voltage decay and capacity fade, largely because of the dimerization of lattice oxygen. Therefore, tunability and stabilization of O redox configuration become crucial. In this study, the stability of the multiple forms of oxygen redox and the resulting role in cycling performance have been comparatively studied. A stabilized single O hole state has been identified experimentally for the first time not only in the first cycle but also in the long term cycle, in sharp contrast to the case of O dimer. Moreover, the superiority of the O hole can also be reflected in removing kinetic limitations. These findings may open new horizons for offering stable and high capacity via regulation of specific oxygen-redox forms.
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Research context

OpenAlex topics: Advanced Battery Technologies Research · Advancements in Battery Materials · Advanced Battery Materials and Technologies

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai 200050, China

University of the Chinese Academy of Sciences, Beijing 100049, China

School of Chemistry and Chemical Engineering, in situ Center for Physical Sciences, Shanghai Jiao Tong University, Shanghai 200240, China

Global Institute of Future Technology, Shanghai Jiao Tong University, Shanghai 200240, China

School of Physical Science and Technology, ShanghaiTech University, Shanghai 201210, China

National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei 230029, China

Center for Transformative Science, ShanghaiTech University, Shanghai 201210, China

Shanghai Synchrotron Radiation Facility, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201204, China

College of Physics, Center for Marine Observation and Communications, Qingdao University, Qingdao 266071, China

Funding

National Key Research and Development Program of China · National Natural Science Foundation of China · Shanghai Soft X-ray Free-Electron Laser Facility beamline projection

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