Bifunctional Al2O3-Based Artificial Layers on LiNiO2 Cathodes for High-Energy-Density Aqueous Li-Ion Batteries

• DOI: 10.1021/acs.chemmater.3c02430
• Publication Date: 2023-12-21T15:39:08Z
• Authors: Changhee Lee; Jin-Myung Choi; Yuto Miyahara; Il Jeon; Kohei Miyazaki; Takeshi Abe
• Keywords: Energy density

Passivation films, commonly referred to as solid–electrolyte interphase and cathode–electrolyte (CEI), are essential for the operation of rechargeable batteries due their positive impact on electrochemical performances. This paper reports a bifunctional Al2O3 artificial layer LiNiO2 (LNO) cathode high-energy-density aqueous Li-ion (ALIBs). As determined by first-principles density functional theory calculations, has relatively high adsorption energy with H2O molecules at surface, which is expected effectively block direct contact LNO surface. The characteristics cathodes can be improved coating an layer, especially cyclability (capacity retention ∼77.8% after 50 cycles), forming effective CEI providing stability bulk structure. Particularly, undergoes in situ modification more stable Al(OH)3 electrolyte, important role producing suppressing interfacial side reactions. presents promising approach LNO-based ALIBs, crucial methodology enhance properties, even conventional solutions.