Issue 10, 2022

Single crystal Ni-rich NMC cathode materials for lithium-ion batteries with ultra-high volumetric energy density

Abstract

Nickel-rich layered transition metal oxides (LiNixMnyCo1−xyO2 (x ≥ 0.6), Ni-rich NMCs) have been under intense investigation as high-energy density and low-cost positive electrode materials for Li-ion batteries. However, insufficient cyclic and thermal stability as well as low tap density hinder broad commercial application of commonly used polycrystalline Ni-rich NMCs. Here, we report on single crystal Ni-rich NMCs with improved cycling stability and ultra-high tap density up to 3.0 g cm−3 coupled with high discharge capacity, resulting in enhanced volumetric energy density of prepared electrodes up to 2680 W h L−1. Record tap density is achieved due to the formation of single crystal particles with spherical-like shapes through adjustment of the lithium chemical potential by using K2SO4 as a solvent during the single crystal growth. The designed single crystal NMC622 and NMC811 cathode materials are promising for applications in batteries with high specific energy and long-term cycling life.

Graphical abstract: Single crystal Ni-rich NMC cathode materials for lithium-ion batteries with ultra-high volumetric energy density

Supplementary files

Article information

Article type
Communication
Submitted
08 aug 2022
Accepted
19 sep 2022
First published
21 sep 2022
This article is Open Access
Creative Commons BY license

Energy Adv., 2022,1, 677-681

Single crystal Ni-rich NMC cathode materials for lithium-ion batteries with ultra-high volumetric energy density

I. A. Moiseev, A. A. Savina, A. D. Pavlova, T. A. Abakumova, V. S. Gorshkov, E. M. Pazhetnov and A. M. Abakumov, Energy Adv., 2022, 1, 677 DOI: 10.1039/D2YA00211F

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