Department of Chemical Engineering, Pohang University of Science and Technology (POSTECH), Pohang37673, South Korea.
Department of Chemical Engineering, Pukyong National University, Busan48513, South Korea.
Nano Lett. 2022 Dec 28;22(24):10232-10239. doi: 10.1021/acs.nanolett.2c03320. Epub 2022 Nov 11.
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 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 patterns. The composite electrolyte comprising LiLaZrO 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.
针对固态锂离子电池，我们开发了图案化电极，其终极目标是通过改善电极中电化学激活表面来促进快速充电属性。通过传统的光刻技术，我们直接在集流器上制造了 SnO 纳米线的图案化阵列，并且通过改变 SnO 图案的大小和间隔来定制所得阵列之间的空通道结构。我们利用包含 LiLaZrO 和聚（氧化乙烯）的复合电解质来确保在电极/电解质交界处的紧密界面接触，同时保持在整体电解质中的离子导电性。然后，我们通过实验探索了电极图案化方法的潜力和局限性。例如，我们研究了图案化电极的电化学行为随微通道结构变化的情况，并与传统的薄膜型电极进行了比较。研究结果表明，当电极的界面特性较差可能阻碍电化学反应动力学时，这种方法有望改善电极动力学。
