Protective Spinel Coating for Li1.17Ni0.17Mn0.50Co0.17O2 Cathode for Li-Ion Batteries through Single-Source Precursor Approach

Authors

Evgney V. Dikarev, University at Albany, State University of New York
Jesse C. Carozza, University at Albany, State University of New York
Andrey Shevtsov, Moscow State Lomonosov University
Haixiang Han, University at Albany, State University of New York
Anatolii Morozov, Moscow State Lomonosov University
Aleksandra A. Savina, Skolkovo Institute of Science and Technology
Iaroslava Shakhova, Skolkovo Institute of Science and Technology
Nellie R. Khasanova, Moscow State Lomonosov University
Evgeny V. Antipov, Moscow State Lomonosov University
Artem M. Abakumov, Skolkovo Institute of Science and Technology

Document Type

Article

Publication Date

9-20-2020

DOI

https://doi.org/10.3390/nano10091870

Abstract

The Li_1.17Ni_0.17Mn_0.50Co_0.17O₂ Li-rich NMC positive electrode (cathode) for lithium-ion batteries has been coated with nanocrystals of the LiMn_1.5Co_0.5O₄ high-voltage spinel cathode material. The coating was applied through a single-source precursor approach by a deposition of the molecular precursor LiMn_1.5Co_0.5(thd)₅ (thd = 2,2,6,6-tetramethyl-3,5-heptanedionate) dissolved in diethyl ether, followed by thermal decomposition at 400 °C inair resulting in a chemically homogeneous cubic spinel. The structure and chemical composition of the coatings, deposited on the model SiO₂ spheres and Li-rich NMC crystallites, were analyzed using powder X-ray diffraction, electron diffraction, high angle annular dark-field scanning transmission electron microscopy (HAADF-STEM), and energy-dispersive X-ray (EDX) mapping. The coated material containing 12 wt.% of spinel demonstrates a significantly improved first cycle Coulombic efficiency of 92% with a high first cycle discharge capacity of 290 mAhg⁻¹. The coating also improves the capacity and voltage retention monitored over 25 galvanostatic charge–discharge cycles, although a complete suppression of the capacity and voltage fade is not achieved.

Comments

This is the Publisher’s PDF of the following article made available by Nanomaterials: Shevtsov A, Han H, Morozov A, Carozza JC, Savina AA, Shakhova I, Khasanova NR, Antipov EV, Dikarev EV, Abakumov AM. Protective Spinel Coating for Li_1.17Ni_0.17Mn_0.50Co_0.17O₂ Cathode for Li-Ion Batteries through Single-Source Precursor Approach. Nanomaterials. 2020; 10(9):1870. https://doi.org/10.3390/nano10091870

Creative Commons License

This work is licensed under a Creative Commons Attribution 4.0 International License.

Recommended Citation

Dikarev, Evgney V.; Carozza, Jesse C.; Shevtsov, Andrey; Han, Haixiang; Morozov, Anatolii; Savina, Aleksandra A.; Shakhova, Iaroslava; Khasanova, Nellie R.; Antipov, Evgeny V.; and Abakumov, Artem M., "Protective Spinel Coating for Li1.17Ni0.17Mn0.50Co0.17O2 Cathode for Li-Ion Batteries through Single-Source Precursor Approach" (2020). Chemistry Department Faculty Scholarship. 4.
https://scholarsarchive.library.albany.edu/chemistry_fac_scholar/4