Benchmarking the electrochemical parameters of the LiNi0.8Mn0.1Co0.1O2 positive electrode material for Li-ion batteries

Aleksandra A Savina; Artem M Abakumov

doi:10.1016/j.heliyon.2023.e21881

Benchmarking the electrochemical parameters of the LiNi_0.8Mn_0.1Co_0.1O₂ positive electrode material for Li-ion batteries

Heliyon. 2023 Nov 1;9(12):e21881. doi: 10.1016/j.heliyon.2023.e21881. eCollection 2023 Dec.

Authors

Aleksandra A Savina¹, Artem M Abakumov¹

Affiliation

¹ Center for Energy Science and Technology, Skolkovo Institute of Science and Technology, Bolshoy Boulevard 30, bld. 1, 121205, Moscow, Russia.

Abstract

The layered oxide LiNi_0.8Mn_0.1Co_0.1O₂ (NMC811, NCM811) is of utmost technological importance as a positive electrode (cathode) material for the forthcoming generation of Li-ion batteries. In this contribution, we have collected 548 research articles comprising >950 records on the electrochemical properties of NMC811 as a cathode material in half-cells with metallic Li counter electrode. The analysis of distribution histograms provided statistically-relevant values of such key characteristics of NMC811 as the first cycle discharge capacity and Coulombic efficiency, discharge capacities at different upper cut-off voltages, capacity fade and capacity retention at the 0.1C-5C current densities. We derived equations describing the relationships between discharge capacity and upper cut-off voltage, Ni content in the LiNi_xMn_yCo_zO₂ compositions in vicinity of NMC811, antisite disorder, and the C-rate. Additionally, the distribution histograms were used for a qualitative comparison between various groups of NMC811 materials, such as benchmarks in various optimizations vs obtained in course of synthesis development, lab-made vs commercial, polycrystalline vs single-crystal. The results of this analysis provide justified values to be used as benchmarks in further works related to optimizing and improving NMC811 and related materials, eliminating random picking up from a huge pool of published data.

Keywords: Benchmarking; Cathode material; Li-ion battery; NMC811; Ni-rich layered oxide.