Bulk/Interfacial Synergetic Approaches Enable the Stable Anode for High Energy Density All-Solid-State Lithium–Sulfur Batteries

Abstract

All-solid-state lithium–sulfur batteries (ASSLSBs) using solid-state electrolytes (SSEs) are believed to concurrently ensure high safety and decent electrochemical performance. However, the ASSLSBs still face several challenges on the anode side, including the interfacial incompatibility between Li/SSEs, dendritic problems, and dramatic volume expansion/contraction of Li metal during cycling. Herein, we propose bulk/interfacial synergetic approaches to overcome the above limitations by incorporating the Li-based lithium–boron (80LiB) alloy with a unique 3D skeleton and Ag@C modified layer. These synergistic approaches have proven to effectively alleviate the volume variation to retain the bulk electrode integrity, facilitate homogeneous Li dissolution/deposition to inhibit the formation of lithium dendrite, and suppress interfacial side reactions to maintain a stable interphase. Benefitting from our ingenious design, the ASSLSBs deliver a specific capacity of 1316 mAh g–1 and a capacity retention of 82% after 60 cycles. These approaches pave a new way to develop high energy density and high performance ASSLSBs.

Highly Reversible Lithium Metal Anode Enabled by 3D Lithiophilic–Lithiophobic Dual‐Skeletons

“…More recently, a special Li-rich Li-LiB (denote as Li-B) composite, which is constituted with metallic Li and LiB phases, have attracted great interest due to its unique fibriform and ultralight LiB skeletons. [27][28][29][30] As there is a potential difference in stripping free-Li and alloyed Li, most free-Li in such Li-B composites can be utilized before the dealloying reaction of LiB, which keeps the stability of the skeletons. In addition, the thermodynamically stable LiB phase possesses well compatibility to Li, which can play as lithiophilic skeletons to induce dense Li deposition, while no need of additional activate process.…”

Advances in Solid-State Batteries, a Virtual Issue, Part II

“…in the SSBs. The interface and compatibility between the electrodes and solid electrolytes are also essential to ensure excellent electrochemical properties of solid-state cells . LiNi 0.5 Mn 1.5 O 4 is found to be incompatible with Li 6 PS 5 Cl electrolyte but suitable for a solid halide electrolyte, Li 3 YCl 6 .…”

Long‐Life and High‐Loading All‐Solid‐State Li–S Batteries Enabled by Acetylene Black with Dispersed Co‐N4 as Single Atom Catalyst

“…[9,10] Replacing organic electrolytes with nonflammable solid electrolytes to prepare all-solid-state Li-S batteries (ASSLSBs) is an effective strategy to alleviate the above-mentioned problems. [11][12][13] Particularly, sulfide solid electrolytes such as Li 7 P 3 S 11 , Li 10 GeP 2 S 12 , and Li 6 PS 5 Cl have attracted extensive attention due to their high ionic conductivity (>10 −3 S cm −1 ) and favorable mechanical properties. [14][15][16] In general, the conversion of sulfur in ASSLSBs does not involve the formation of soluble LiPSs, so the polysulfide shuttle effect can be fundamentally solved.…”