Yoo Hyeonseok, Lee Gibaek, Choi Jinsub
Department of Chemistry and Chemical Engineering, Inha University 22212 Incheon Republic of Korea
Chemical Engineering for Energy, School of Chemical Engineering, Yeungnam University 38541 Gyeongsan Republic of Korea
RSC Adv. 2019 Feb 25;9(12):6589-6595. doi: 10.1039/c8ra10358e. eCollection 2019 Feb 22.
A SnO-TiO electrode was prepared anodization and subsequent anodic potential shock for a binder-free anode for lithium-ion battery applications. Perpendicularly oriented TiO microcones are formed by anodization; SnO, originating in a NaSnO precursor, is then deposited in the valleys between the microcones and in their hollow cores by anodic potential shock. This sequence is confirmed by SEM and TEM analyses and EDS element mapping. The SnO-TiO binder-free anode is evaluated for its C-rate performance and long-term cyclability in a half-cell measurement apparatus. The SnO-TiO anode exhibits a higher specific capacity than the one with pristine TiO microcones and shows excellent capacity recovery during the rate capability test. The SnO-TiO microcone structure shows no deterioration caused by the breakdown of electrode materials over 300 cycles. The charge/discharge capacity is at least double that of the TiO microcone material in a long-term cycling evaluation.
通过阳极氧化和随后的阳极电位冲击制备了一种用于锂离子电池无粘结剂阳极的SnO-TiO电极。通过阳极氧化形成垂直取向的TiO微锥；源自NaSnO前驱体的SnO随后通过阳极电位冲击沉积在微锥之间的谷底及其空心核心中。扫描电子显微镜（SEM）、透射电子显微镜（TEM）分析和能谱（EDS）元素映射证实了这一过程。在半电池测量装置中评估了SnO-TiO无粘结剂阳极的C倍率性能和长期循环稳定性。SnO-TiO阳极比原始TiO微锥阳极表现出更高的比容量，并且在倍率性能测试中显示出优异的容量恢复能力。SnO-TiO微锥结构在300次循环中未因电极材料的分解而出现劣化。在长期循环评估中，其充/放电容量至少是TiO微锥材料的两倍。
