Silicon anode solid-state batteries Research on solid-state batteries has focused on lithium metal anodes. Alloy-based anodes have received less attention in part due to their lower specific capacity even though they should be safer. Tan et al . developed a slurry-based approach to create films from micrometer-scale silicon particles that can be used in anodes with carbon binders. When incorporated into solid-state batteries, they showed good performance across a range of temperatures and excellent cycle life in full cells. —MSL

All-solid-state batteries (ASSBs) are viewed as promising next-generation energy storage devices, due to their enhanced safety by replacing organic liquid electrolytes with non-flammable solid-state electrolytes (SSEs). The high ionic conductivity...

drastically improved between 1st and 3rd generations, showing decreasing the cost of manufacturing while maintaining power efficiency. [2] More recently, highefficiency and low-cost hybrid organicinorganic halide perovskite materials have emerged as the most promising light absorber for the new generation of photovoltaics replacing commercially dominant polycrystalline silicon materials. [3][4][5][6][7][8] After demonstrating solid-state perovskite solar cells (PSCs) in 2012, [9] the volume of research for PSC has massively increased. Consequently, power conversion efficiency of PSCs has rapidly developed, currently exceeding 25%, surpassing Cu(In,Ga)Se 2 (CIGS) and cadmium telluride (CdTe), and approaching to single crystalline silicon solar cells.

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In the development of low cost, sustainable, and energy-dense batteries, chloride-based compounds are promising catholyte materials for solid-state batteries owing to their high Na-ion conductivities and oxidative stabilities. The ability...

One approach to increase the energy density of all-solid-state batteries (ASSBs) is to use high-voltage cathode materials. The spinel LiNi0.5Mn1.5O4 (LNMO) cathode is one such example, as it offers a high reaction potential (close to 5 V). Moreover, it is a Co-free cathode system, which makes it an environmentally friendly and a low-cost alternative. However, several challenges must be addressed before it can be properly adopted in ASSB technologies. Herein, we reveal that lithium argyrodite (Li6PS5Cl), a sulfide solid-state electrolyte (SSE), possesses intrinsic chemical incompatibility with the LNMO cathode. We demonstrate the necessity of using a halide SSE, Li3YCl6 (LYC), through careful analysis of the LNMO/SSE interface. Moreover, we emphasize the necessity of applying a protective coating layer to LNMO particles, even when halide SSEs are used. Furthermore, the chemical phenomena involving LYC in the oxidative environment of LNMO are analyzed, including a comparison between coated and uncoated LNMO particles.

All-solid-state batteries (ASSBs) are one of the most promising systems to enable long-lasting and thermally resilient next-generation energy storage. Ideally, these systems should utilize low-cost resources with reduced reliance on critical materials. Pursuing cobalt-and nickel-free chemistries, like LiFePO 4 (LFP), is a promising strategy. Morphological features of LFP essential for improved electrochemical performance are highlighted to elucidate the interfacial challenges when implemented in ASSBs, since adoption in inorganic ASSBs has yet to be reported. In this work, the compatibility of LFP with two types of solid-state electrolytes, Li 6 PS 5 Cl (LPSCl) and Li 2 ZrCl 6 (LZC), are investigated. The potential existence of oxidative decomposition products is probed using a combination of structural, electrochemical, and spectroscopic analyses. Bulk and interfacial characterization reveal that the sulfidebased electrolyte LPSCl decomposes into insulative products, and electrochemical impedance spectroscopy is used to quantify the resulting impedance growth. However, through utilization of the chloride-based electrolyte LZC, high-rate and stable electrochemical performance is achieved at room temperature.

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