DataVXACS Applied Materials & InterfacesPaper
journal article·2021-12-15

Identifying Element-Modulated Reactivity and Stability of the High-Voltage Spinel Cathode Materials via In Situ Time-Resolved X-Ray Diffraction

Ying Luo, Yong Wang, Linsen Li, Yingjie Du, Liqin Yan, Tianrang Yang, Wen Wen, Liheng Zhang, Rui Guo, Cheng Yang, Jingying Xie

ACS Applied Materials & Interfaces· Volume 13· Issue 49
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Source abstract

Abstract

Designing and identifying a dopant-involved material is quite significant, especially for battery science. LiNi0.5Mn1.5O4, being one of the most appealing candidates for high-potential lithium-ion batteries, has attracted immense attention and been investigated with Al or F dopants for its undesirable inherent structural challenges. Although the excellent performance of Al- or F-doped LiNi0.5Mn1.5O4 has been reported previously, the relationship between dopants, structural variation, and electrochemistry has not been fully identified. Hence, synchronous time-resolved XRD techniques are applied for identifying a guideline of the phase variations in cathodic (Al3+)- and anodic (F-)-substituted LiNi0.5Mn1.5O4, which revealed a three-phase evolution as a function of structural stability. Also, the Al-substituted materials exhibit excellent reactivity and stability, which can be clearly identified via the stable buffer phase existing in high power density or after long cycling due to the improvement in reaction kinetics of phase transition and the lithium-ion diffusion coefficient, just opposite to F doping. This provides a good guideline for identifying an element-modulated mechanism of reactivity or stability of materials science.
Source: europepmc · Quality: candidate unverified · Source record ↗

Research context

Energy storage

OpenAlex topics: Advancements in Battery Materials · Magnetic Properties and Synthesis of Ferrites · X-ray Diffraction in Crystallography

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

Affiliations

State Key Laboratory of Space Power-Sources Technology, Shanghai Institute of Space Power-Sources, Shanghai 200245, China

Department of Chemical Engineering, School of Chemistry and Chemical Engineering, Frontiers Science Center for Transformative Molecules, Shanghai Jiao Tong University, Shanghai 200240, China

Sichuan Research Institute, Shanghai Jiao Tong University, Chengdu 610213, China

School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin 150001, China

Ministry of Education, Key Laboratory of Power Station Energy Transfer Conversion and System (North China Electric Power University), Beijing 102206, China

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

Funding

Ministry of Science and Technology of the People's Republic of China · Science and Technology Commission of Shanghai Municipality · National Natural Science Foundation of China · Shanghai Rising-Star Program · Sichuan Science and Technology Program

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