Surface-Coated LiNi0.8Co0.1Mn0.1O2 (NCM811) Cathode Materials by Al2O3, ZrO2, and Li2O-2B2O3 Thin-Layers for Improving the Performance of Lithium Ion Batteries

Abstract

In this paper, the precursor Ni 0. 8Co 0.1 Mn 0.1 (OH) 2 is prepared by a co-precipitation method. By mixing this material with LiOH in proportion and sintering twice under 500 and 800 • C, respectively, the cathode material of LiN i0.8 Co 0.1 Mn 0.1 O 2 (NCM811) for lithium ion batteries (LIBs) is synthesized. To improve the performance of this NCM811 material, Al 2 O 3 , ZrO 2 , and LBO (Li 2 O-2B 2 O 3) are, respectively, used to coat it by a wet chemical method. The effects of Al 2 O 3 , ZrO 2 , and LBO thin coating layers (∼20-200 nm) on the morphology, structure and electrochemical property of NCM811 are studied using XRD, SEM, TEM, XPS, and electrochemical measurements. Coin LIBs are assembled with the uncoated, Al 2 O 3-coated, ZrO 2-coated, and LBO-coated NCM811 cathode materials for performance validation. The experiment results confirm that the charge-discharge specific capacity, Coulomb efficiency, water absorption stability, cycle characteristics, and resistance stability of the NCM811 cathode material can be significantly improved by coating it with LBO particularly. Therefore, the surface coating to the particles of cathode materials using LBO is expected to be an effective and practical modification method to improve the electrochemical performance of LIBs.

Electrospun Ternary Composite Metal Oxide Fibers as an Anode for Lithium-Ion Batteries

“…Ever since its discovery in the beginning of 1980s, rechargeable lithium-ion battery (LIB) attracted tremendous attention as one of the crucial elements to the decarbonized energy sector for a sustainable society (Mizushima et al, 1980;Goodenough, 2018). Following its commercialization by Sony, efforts are mostly focused on developing cathode materials with improved electrochemical properties, such as nickel-lithium-rich nickel-cobalt-manganese oxide (NCM) and nickel-cobalt-aluminum oxide (NCA) (Song et al, 2020;Wang et al, 2020;Xu et al, 2020) (Tolouei et al, 2019;Zhang et al, 2019;Guanjie Li et al, 2020) as well as high potential spinel LiMn 1.5 Mn 0.5 O 4 and olivine LiMPO 4 (where M = Co, Ni, Mn) (Chemelewski et al, 2013;Liang et al, 2020;Ling et al, 2021a) materials. Recently, demand to deploy LIBs in long-mileage electric vehicles as well as smart energy grid applications urged the enhancement of their energy density.…”

Dual function Li-reactive coating from residual lithium on Ni-rich NCM cathode material for Lithium-ion batteries

“…The Ni-rich NCM materials e.g. LiNi 0.8 Co 0.1 Mn 0.1 O 2 and LiNi 0.9 Co 0.05 Mn 0.05 O 2 are most promising compositions due to their high discharge capacity (> 200 mAh g −1 ) for the energy storage system (ESS) and electric vehicles (EVs) 6 , 7 .…”

Surface modification of Ni-rich LiNi0.8Co0.1Mn0.1O2 with perovskite LaFeO3 for high voltage cathode materials

“…In particular, NCM811 is one of the most promising Ni-rich cathode materials which have a higher capacity than conventional LiCoO 2 cathode material. 10,11 However, some factors like thermal stability and structural change induce performance degradations in Ni-rich layered oxide NCM811 materials. At high voltages, unstable Ni 4+ on the surface of the cathode materials is reduced to Ni 2+ and is accompanied by the formation of a spinel phase or rock salt phase.…”

“…In particular, NCM811 is one of the most promising Ni-rich cathode materials which have a higher capacity than conventional LiCoO 2 cathode material. 10,11 …”