Recent Developments and Challenges in Hybrid Solid Electrolytes for Lithium-Ion Batteries

Abstract

Lithium-ion batteries (LIBs) have attracted worldwide research interest due to their high energy density and long cycle life. Solid-state LIBs improve the safety of conventional liquid-based LIBs by replacing the flammable organic electrolytes with a solid electrolyte. Among the various types of solid electrolytes, hybrid solid electrolytes (HSEs) demonstrate great promise to achieve high ionic conductivity, reduced interfacial resistance between the electrolyte and electrodes, mechanical robustness, and excellent processability due to the combined advantages of both polymer and inorganic electrolyte. This article summarizes recent developments in HSEs for LIBs. Approaches for the preparation of hybrid electrolytes and current understanding of iontransport mechanisms are discussed. The main challenges including unsatisfactory ionic conductivity and perspectives of HSEs for LIBs are highlighted for future development. The present review provides insights into HSE development to allow a more efficient and target-oriented future endeavor on achieving high-performance solid-state LIBs.

The Unusual Conductivity of Na+in PEO‐Based Statistical Copolymer Solid Electrolytes: When Less Means More

“…Such high salt concentrations in polymer electrolytes often lead to heterogeneous materials, [17] and to adecrease in ionic conductivity. [18] Here,w ed emonstrate that statistical copolymers of EO and propylene oxide (PO) containing low salt content (as low as 3wt%,9 0:1O :Na) display greatly reduced crystallinity content (ca. 5% as opposed to ca.…”

Recent advancements in solid electrolytes integrated into all-solid-state 2D and 3D lithium-ion microbatteries

“…101 In addition, they possess faster dynamics at room temperature and excellent capability to solvate large concentrations of lithium salts. 102 Deposition of the electrolytes were mainly done by drop casting or dip coating and electrodeposition, as well as other deposition methods onto electrode materials, which were produced by traditional methods. Since dip/drop coating of PEs may not coat complex structures of electrodes uniformly for high capacity/power batteries, the research has also been focused on other electrolyte deposition methods.…”

Molecular Layer Deposition of Alucone Thin Film on LiCoO2 to Enable High Voltage Operation

“…Lithium‐ion batteries (LIBs) are the state‐of‐the‐art electrochemical energy storage technology for mobile electronic devices and electric vehicles [1,2] . Accordingly, with high theoretical capacity and energy density, the LIBs have attracted a continuously increasing interest [3–5] . To further improve the energy density and reduce the cost of LIBs, tremendous efforts have been devoted for developing new improved materials [6,7] …”