IHEP OpenIR  > 北京同步辐射装置
Relationship between Voltage Hysteresis and Voltage Decay in Lithium-Rich Layered Oxide Cathodes
BSRF用户
2021
Source PublicationJOURNAL OF PHYSICAL CHEMISTRY C
ISSN1932-7447
EISSN1932-7455
Volume125Issue:31Pages:16913--16920
SubtypeArticle
AbstractVoltage decay and voltage hysteresis are important limitations in the commercial application of Li-rich Mn-based layered oxide (LRO) as a cathode material in the next-generation high-energy-density Li-ion batteries. Although significant progress in studies on the voltage decay mechanism has been made, the evolution of voltage decay and its relationship with voltage hysteresis need to be further understood. Herein, a detailed investigation of the evolution of voltage decay and its relationship with voltage hysteresis for LRO is performed via spherical aberration-corrected transmission electron microscopy, in situ X-ray powder diffraction, ex situ X-ray absorption spectroscopy, and galvanostatic intermittent titration technique. The results reveal that the initial voltage hysteresis is mainly related to the anionic redox process. Due to the surface structural change, the kinetic process of surface deintercalation of lithium slows down, and the voltage hysteresis becomes more and more serious during charge and discharge, which is shown by the continuous increase of voltage decay. This finding can open up a new pathway for developing a strategy for suppressing voltage decay in high-capacity Li-rich Mn-based layered materials.
DOI10.1021/acs.jpcc.1c04339
Indexed BySCI
Language英语
WOS Research AreaChemistry ; Science & Technology - Other Topics ; Materials Science
WOS SubjectChemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary
WOS IDWOS:000685650400004
ItemNoBSRF00529
beamline1W2B
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ihep.ac.cn/handle/311005/293297
Collection北京同步辐射装置
Recommended Citation
GB/T 7714
BSRF用户. Relationship between Voltage Hysteresis and Voltage Decay in Lithium-Rich Layered Oxide Cathodes[J]. JOURNAL OF PHYSICAL CHEMISTRY C,2021,125(31):16913--16920.
APA BSRF用户.(2021).Relationship between Voltage Hysteresis and Voltage Decay in Lithium-Rich Layered Oxide Cathodes.JOURNAL OF PHYSICAL CHEMISTRY C,125(31),16913--16920.
MLA BSRF用户."Relationship between Voltage Hysteresis and Voltage Decay in Lithium-Rich Layered Oxide Cathodes".JOURNAL OF PHYSICAL CHEMISTRY C 125.31(2021):16913--16920.
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