A silicon anode for garnet-based all-solid-state batteries: Interfaces and nanomechanics

Recent Advances in Silicon‐Based Electrodes: From Fundamental Research toward Practical Applications

“…e,f) Reproduced with permission. [365] Copyright 2019, Elsevier. www.advmat.de www.advancedsciencenews.com…”

“…Furthermore, a 1 µm thick Si anode was successfully fabricated in a garnet‐type solid‐state battery, which replaced the conventional organic electrolytes (Figure 23e). [ 365 ] The solid‐state battery showed a high initial discharge capacity of 2685 mAh g −1 and high CE of 83.2% (Figure 23f), which was much higher than that in organic electrolyte (77.1%). Under the combined effort of experiment and simulation studies, it was discovered that the strong nanomechanical constraint of the garnet alleviated Si volume expansion, prevented cracks, and improved ionic and electronic conductivities.…”

“…e) Morphology change and f) electrochemical performance of the Li/garnet/Si cell under discharging state. e,f) Reproduced with permission [365]. Copyright 2019, Elsevier.…”

Carbon-free high-loading silicon anodes enabled by sulfide solid electrolytes

“…Recognizing that the Si stability problems arise mainly from the liquid electrolyte interface, the use of solid-state electrolytes (SSEs) in an all solid-state battery (ASSB) cell configuration is a promising alternative approach, due to its ability to form a stable SEI (21). While previous studies have reported the use of thin (sub-micron) film type Si in ASSBs, without use of carbon or binder (11,22,23), none have explored use of bulk type µSi for fabricating high-loading anodes to date. Most ASSB reports have focused instead on the use of metallic Li, in efforts to maximize cell energy densities.…”

Effect of the Etching Profile of a Si Substrate on the Capacitive Characteristics of Three-Dimensional Solid-State Lithium-Ion Batteries

“…The change in the thickness of the functional layers can serve as a confirmation of the stated assumption about the "disconnection" of the cones at high current densities. Based on the well-known fact about a significant increase in the volume of silicon during its lithiation [20], it is possible to judge whether the lithiation-delithiation processes took place in the layer of the silicon composite Si-O-Al. SEM examination of 3D SSLIB samples proves that the processes of lithiation and delithiation of Si-O-Al layer proceeded unevenly over the area of the solid-state battery.…”