Jiangsu Key Laboratory for Nano Technology, National Laboratory of Solid State Microstructures, College of Engineering and Applied Sciences, and Collaborative Innovation Center of Advanced Microstructures , Nanjing University , 22 Hankou Road , Nanjing 210093 , China.
Kunshan Sunlaite New Energy Co., Ltd. , 1666# South Zuchongzhi Road , Kunshan 215347 , Jiangsu , China.
ACS Appl Mater Interfaces. 2019 Feb 6;11(5):5146-5151. doi: 10.1021/acsami.8b20573. Epub 2019 Jan 28.
Efficient electrocatalysts for LiCO decomposition play an important role in Li-CO batteries. In this paper, carbon nanotubes (CNTs) decorated with RuO is firstly introduced as cathode materials for Li-CO batteries. The CNT@RuO composite can not only deliver a high specific capacity but also a lower charge voltage. With the CNT@RuO cathodes, the Coulombic efficiency still remains around 100% until the 15th cycle. The charge voltage of early 30 cycles at a current of 50 mA·g with a capacity limit of 500 mAh·g can be fully lowered under 4.0 V. Particularly, the CNT@RuO cathode can realize most decomposition of prefilled LiCO and show a platform at around 3.9 V. This catalytic activity toward both in situ formed and preloaded LiCO is more feasible for practical application in complex environment.
用于 LiCO 分解的高效电催化剂在 Li-CO 电池中起着重要作用。本文首次将 RuO 修饰的碳纳米管 (CNTs) 用作 Li-CO 电池的阴极材料。CNT@RuO 复合材料不仅提供了高比容量，而且还降低了充电电压。使用 CNT@RuO 阴极，在 50 mA·g 的电流和 500 mAh·g 的容量限制下，第 15 次循环的库仑效率仍保持在 100%左右。在 4.0 V 以下，前 30 个循环的充电电压可以完全降低到 30 个循环。特别是，CNT@RuO 阴极可以实现预填充 LiCO 的大部分分解，并在 3.9 V 左右显示出一个平台。这种对原位形成和预加载 LiCO 的催化活性更适合在复杂环境中的实际应用。
