Jump to main content
Jump to site search
PLANNED MAINTENANCE Close the message box

Scheduled maintenance work on Wednesday 22nd May 2019 from 11:00 AM to 1:00 PM (GMT).

During this time our website performance may be temporarily affected. We apologise for any inconvenience this might cause and thank you for your patience.



Investigation of the self-discharge behaviors of the LiMn2O4 cathode at elevated temperatures: in situ X-ray diffraction analysis and a co-doping mitigation strategy

Author affiliations

Abstract

The practical application of lithium-ion batteries at elevated temperatures is significantly hampered by their poor cyclabilities and self-discharge behaviors. In this study, we investigated real-time structural evolution of the lithium manganese oxide cathode (LiMn2O4, LMO) in the idle charged state as well as the origin of the self-discharge process via in situ X-ray diffraction analysis. Moreover, we proposed a facile and scalable co-doping strategy for the incorporation of Al3+, F and PO43− into the LMO spinel structure; in addition, the thermal stability of the LMO samples was ameliorated by suppressing the parasitic formation of a Li-rich phase of LMO upon long-term cycling. When evaluated at room temperature, the modified LMO exhibits the impressive areal mass loading of up to 17.8 mg cm−2, the highest areal capacities of ∼1.4 mA h cm−2 at 5C, robust cyclability even after 1000 charge/discharge cycles, lower polarization voltage and significant mitigation of the self-discharge process at the elevated temperature of 55 °C; thus, this low-cost scalable modification strategy makes the LMO cathode commercially feasible for high-temperature applications.

Graphical abstract: Investigation of the self-discharge behaviors of the LiMn2O4 cathode at elevated temperatures: in situ X-ray diffraction analysis and a co-doping mitigation strategy

Back to tab navigation

Supplementary files

Publication details

The article was received on 13 Mar 2019, accepted on 24 Apr 2019 and first published on 24 Apr 2019


Article type: Paper
DOI: 10.1039/C9TA02718A
J. Mater. Chem. A, 2019, Advance Article

  •   Request permissions

    Investigation of the self-discharge behaviors of the LiMn2O4 cathode at elevated temperatures: in situ X-ray diffraction analysis and a co-doping mitigation strategy

    X. Tang, J. Zhou, M. Bai, W. Wu, S. Li and Y. Ma, J. Mater. Chem. A, 2019, Advance Article , DOI: 10.1039/C9TA02718A

Search articles by author

Spotlight

Advertisements