Controllable Cathode–Electrolyte Interface of Li[Ni_0.8Co_0.1Mn_0.1]O₂ for Lithium Ion Batteries: A Review

Abstract

As a high‐capacity layered cathode material, Li[Ni0.8Co0.1Mn0.1]O2 (NCM811) has been one of the most felicitous candidates for utilization in the next generation of high‐energy lithium ion batteries (LIBs). Notwithstanding its superiority, there are some issues concerning its cyclability, rate capability, and thermal stability that need to be settled prior to its further practical application. It is believed that upon cycling, chemical, mechanical, and electrochemical stability of the cathode–electrolyte interface plays a key role in resolving these issues. Therefore, all the extensive efforts directed so far toward the optimization of NCM811 electrochemical performance are by some means in connection with the cathode–electrolyte interface. Herein, unique structural and electrochemical characteristics of NCM811 together with in‐depth understanding of its underlying bulk/surface degradation mechanism through cycling are reviewed. More importantly, for the first time, all compatible approaches thus far adopted to perfect the performance of NCM811 are exclusively and scrupulously addressed. Lastly, the most reasonable resolutions to accomplish a robust cathode–electrolyte interface, and consequently impeccable NCM811, along with proposed future research directions are presented.

Surface Modification Strategies for Improving the Cycling Performance of Ni‐Rich Cathode Materials

“…Currently, several criteria for material choices are debated, such as Lewis acidity, electrochemical stability vs. Li + /Li or resistance to HF attacks . Another important parameter is whether powder or electrode tape is exposed to the ALD process, as electrical contact to the current collector may be blocked in the former but enabled in the latter case.…”

Regulating the Performance of Lithium-Ion Battery Focus on the Electrode-Electrolyte Interface

“…The use of in-situ monitoring techniques for probing the changes occurring on the surface of the cathode, like the use of in-situ synchronous XPS and XAS on Li 1−x Mn 1.5 Ni 0.5 O 4 neutron reflectometer and LiCoO 2 or Li 1−x Ni 0.2 Co 0.7 Mn 0.1 O 2 (Browning et al, 2014;Yamamoto et al, 2014;Cherkashinin et al, 2015), offers the potential to provide new insight on the process of formation of the interfacial films on the surface of the positive electrode material, without any interference from the effect of the conductive agent and the binder. Also, the interface film of high-nickel ternary material LiNi 0.8 Co 0.1 Mn 0.1 O 2 is also a recent research content (Hirbod and Xifei, 2019).…”

Polyethylene Oxide-Based Composites as Solid-State Polymer Electrolytes for Lithium Metal Batteries: A Mini Review

“…However, Li-metal batteries (LMBs) with liquid electrolytes cannot coordinate a high energy density with excellent electro-stability for real applications (Choudhury et al, 2019b ). The robustness and integrity of the electrode–electrolyte interface through cycling ensure the efficacy of the whole cell (Maleki Kheimeh Sari and Li, 2019 ). To address these issues, solid-state polymer electrolytes (SPEs) in the replacement electrolytes have already demonstrated feasibility and superiority in lithium secondary batteries (e.g., solid-state LMBs, lithium-sulfur batteries, and lithium-gas batteries) (Xiao et al, 2019 ; Zhou et al, 2019 ; Zhao et al, 2020 ).…”