Recent Developments in the Field of Sulfide Ceramic Solid‐State Electrolytes

Abstract

The demand for higher energy density and safety leads to replacement of conventional Li+ batteries for all‐solid‐state lithium‐ion batteries (ASSLIB). A Li+ conductivity comparable with those of liquid electrolytes is sine qua non for commercialization of ASSLIB, and sulfide solid‐state electrolytes (SSEs) demonstrate this feature. However, the interfacial SSE decomposition at electrodes/electrolyte interfaces and Li‐dendrite growth at anodes represent a serious barrier for commercialization of ASSLIBs with SSEs. Herein, an overview on the progress made in this arena is provided and the state of the art and the latest development of SSE with high Li+ ‐conductivity are included, and the progress in engineering of the SSE/electrode interfaces, along with the vision of the perspectives on research in the field, is presented.

Unveiling Solid Electrolyte Interphase Formation at the Molecular Level: Computational Insights into Bare Li-Metal Anode and Li6PS5–xSexCl Argyrodite Solid Electrolyte

“…Moreover, the SEI displays reactivity and complex dynamics that are difficult to assess experimentally due to the nonequilibrium state during battery operation. And the contribution of individual processes to the formation and evolution of interfaces can vary widely depending on several factors, such as cell chemistry, electrode/electrolyte combination, cycling protocol, and many more. − …”

“…And the contribution of individual processes to the formation and evolution of interfaces can vary widely depending on several factors, such as cell chemistry, electrode/electrolyte combination, cycling protocol, and many more. 8 − 10 …”

Air Stabilization of Li7P3S11 Solid-State Electrolytes through Laser-Based Processing

“…Despite their long-standing and leading position in the battery world, safety challenges associated with liquid-and gel-based lithium-ion batteries, such as flammability, dendrite growth, and thermal effects, have driven the transportation field to continue innovating to develop alternatives with increasingly more energy and power density while improving overall system safety [1][2][3][4]. Among the possible substitutes all-solid-state batteries (ASSB) employing solid-state electrolytes (SSE) have continued to garner attention from both the scientific and commercial sectors due to their compatibility with metallic lithium, increase in specific energy associated with lithium anodes, and inherent safety associated with its all-solid-state construction [1,[5][6][7].…”

“…In particular, Li 2 S-P 2 S 5 mixtures have shown conductivities as high as 10 −2 S/cm in bulk-processed glass-ceramic materials [1,[19][20][21]. Despite the potential advantages of ASSBs, they still have not achieved widespread commercial implementation.…”

“…Some of these include chemical substitutions or doping in SSEs, which result in improved stability [26][27][28][29][30][31][32][33][34][35]. Various solution-processing techniques have been explored to tackle issues such as production time and cost, achieving suitable Young's moduli for good electrode-electrolyte contact and reducing electrolyte thickness in order to increase device energy density [1,19,36]. Laserbased SSE processing has also been explored in the past on different SSE types.…”