Solid‐State Li Ion Batteries with Oxide Solid Electrolytes: Progress and Perspective

Abstract

Figure 5. a) Cross-section scanning electron microscopy (SEM) of Li|LMF@LLZTO interface and the corresponding partial enlarged view. Reproduced with permission. [98] Copyright 2022, Elsevier. b) The molten Li-C composite on LLZTO pellet. Reproduced with permission. [100] Copyright 2019, Wiley-VCH. c) The Nb-modified LLZO/LiCoO 2 interface suppresses the mutual diffusion and produces a Li-conductive amorphous phase. Reproduced with permission. [106] Copyright 2014, Elsevier. d) The amorphous Ge coating between LAGP SSE and Li metal.

Recent Advances in Developing High-Performance Solid-State Lithium Batteries: Interface Engineering

“…The authors acknowledge pioneering research in this field in the very early years. We also acknowledge the previous comprehensive reviews on the development of SSBs , and reviews specifically on the SEs or electrodes. − Although some other previous reviews have a similar focus (on the challenges of the interface issue) to this work, , new materials, strategies, and interface designs have been emerging in very recent years. This review provides essential updates on the important advances in the topic.…”

Evolution of the Cell Structure, Ionic Conductivity, and Elastic Modulus of the γ-Irradiated LLZTO Electrolyte via Neutron Diffraction and Nanoindentation

“…10−12 Polymer electrolytes have the advantages of flexibility and easy processing, but their ionic conductivity is low, 11 poor thermal stability, and it is difficult to withstand the heat generated by radiation in space, while sulfide and halide electrolytes have poor water stability and are extremely sensitive to electron beam irradiation, 10,12 and it is also difficult to withstand a long period of time, high energy, and a variety of ion irradiations in space; oxide SSEs have become the most promising electrolyte in the future space field of the all-solid-state battery system due to its high energy density, excellent stability, long cycle life, high mechanical strength, and high resistance to irradiation performance. 12,13 Among many oxide SSEs, garnet-type lithium−lanthanum− zirconium−oxygen (LLZO) oxide SSEs lay a solid foundation for the development of next-generation high-energy density and high-security energy storage systems due to their high ionic conductivity, high electrochemical stability window, and good compatibility with lithium metal anodes. So far, there have been some studies on irradiated garnet-type (LLZO) oxide SSEs.…”

Structural Investigation of Li2O–LiI Amorphous Solid Electrolytes

“…Lithium-ion batteries have been widely used as power sources for electric vehicles and mobile electronic devices. The all-solid-state lithium-ion batteries that use flame-retardant inorganic solid electrolytes are particularly noteworthy owing to their safety and high ionic conductivity comparable to those of liquid electrolytes. − Specifically, oxide-based solid electrolytes, such as Li 7 La 3 Zr 2 O 12 (LLZO) , and Li 1.3 Al 0.3 Ti 1.7 (PO 4 ) 3 , , are of interest because of their high chemical stability and lithium-ion conductivity. − However, their poor ductility and high interfacial resistance at the grain boundaries require high-temperature sintering to fabricate all-solid-state cells with oxide-based solid electrolytes. , Additionally, during the sintering process, reaction phases are often formed at the interface between the solid electrolyte and active materials, which can negatively affect cell performance, owing to the low ionic or electronic conductivity of the phases. Therefore, the development of new oxide-based solid electrolytes with high ionic conductivity and ductility is crucial for improving the overall performance of all-solid-state batteries.…”