Patterned electrodes were developed for use in solid-state lithium-ion batteries, with the ultimate goal to promote fast-charging attributes through improving electrochemically activated surfaces within electrodes. By a conventional photolithography, patterned arrays of SnO 2 nanowires were fabricated directly on the current collector, and empty channel structures formed between the resulting arrays were customized through modifying the size and interval of the SnO 2 patterns. The composite electrolyte comprising Li 7 La 3 Zr 2 O 12 and poly(ethylene oxide) was exploited to secure intimate interfacial contact at the electrode/ electrolyte junction while preserving ionic conductivity in the bulk electrolyte. The potential and limitation of the electrode patterning approach were then explored experimentally. For example, the electrochemical behaviors of patterned electrodes were investigated as a function of variations in microchannel structures, and compared with those of conventional film-type electrodes. The findings show promise to improve electrode dynamics when electrochemical reaction kinetics could be hindered by poor interfacial characteristics on electrodes.

Silicon is a promising alternative to the conventional graphite anode for lithium‐ion batteries (LIBs). However, pulverization of Si particles caused by volume expansion and formation of unstable solid electrolyte interphase can lead to several failure behaviors of LIBs. In contrast to LIBs employing liquid electrolytes, all‐solid‐state batteries (ASSBs) could exhibit totally different interfacial environments over Si anode materials, in terms of wetting properties of the Si surface by electrolyte. This characteristic interface of Si anode with solid‐state electrolyte (SSE) can change the electrochemical stability and long‐term life cycle performance of Si. In respect of commercialization, the incorporation of Si anode into ASSB could be the strongest approach to overcome the intrinsic limitations of anode materials. However, large contact losses between Si and SSE have to be handled in order to provide good electrochemical performance and stability. In this review, failure behaviors of Si anode within the SSE with proper characterization method is addressed and several design strategies for incorporation of Si anode into ASSB based on the following classifications are introduced: composite type and diffusion‐dependent type Si anodes. From this review, the possibility of Si anode for practical application to next‐generation ASSB by regulating its chemical and mechanical properties is suggested.

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