Constructing Rechargeable Solid‐State Lithium‐Oxygen Batteries

Abstract

Li‐oxygen batteries (LOBs) hold great potential for electrochemical energy storage due to their high theoretical energy density. However, the utilization of conventional liquid electrolytes raises safety concerns such as flammability and leakage, which are also problematic in Li‐ion batteries. The development of practical open battery systems employing volatile liquid electrolytes, with the ultimate goal of Li‐air batteries, presents particular challenges. Solid‐state electrolytes (SSEs) have emerged as a promising solution to tackle these issues. In the past two decades, SSEs have garnered significant attention and have been successfully implemented in LOBs. This review aims to highlight recent advancements in SSEs for LOBs, exploring the opportunities and challenges associated with developing SSEs possessing high ionic conductivity, interfacial compatibility, and stability. The objective is to enhance reversibility, promote an increase in stable triple‐phase boundaries, and safeguard the Li anode in open battery systems. Finally, we put forth future directions for the advancement of solid‐state Li‐air batteries.

Oxygen defect regulation, catalytic mechanism, and modification of HfO2 as a novel catalyst for lithium–oxygen batteries

“…Overall, the Li 1s and O 1s XPS results mutually determine that LiO 2 's decomposition occurs before the Li 2 O 2 's decomposition, which differs from previous reports. [59][60][61][62] To dig out the underlying mechanism, we constructed HfO x (111) surfaces and calculated its formation energy and the adsorption energy with LiO x . The chemical environments of surface state O atoms as shown in Fig.…”

Oxygen Vacancies Riched PrOx Polycrystalline Nanorods on Graphene Nanosheets as Advanced Oxygen Catalysts for Lithium‐Oxygen Batteries

“…However, they are still in the early stages of laboratory exploration, and many thorny issues remain. [1][2][3][4][5][6][7] The sluggish LiÀ O reaction kinetics is the most urgent technical barrier, including oxygen reduction reaction (ORR) and oxygen evolution reaction (OER), leading to large charge-discharge overpotentials and low round-trip efficiency. [8][9][10][11][12][13] In addition, the insulation of Li 2 O 2 hinders electron/ion transport and significantly reduces energy efficiency and lifespan.…”

Quasi-Solid-State Na–O2 Battery with Composite Polymer Electrolyte

“…Recently, quasi-solid-state and solid-state metal–O 2 batteries become more important due to the rising safety issue of Li-ion batteries. − Nevertheless, the decrease in the liquid contents usually leads to a decrease in ionic conductivity and interfacial problems. Chang et al prepared a quasi-solid-state Na–air battery with a sodium superionic conductor-type (NASICON-type) solid electrolyte.…”