Self-assembling RuO2 nanogranulates with few carbon layers as an interconnected nanoporous structure for lithium-oxygen batteries

Authors

Wei Lai
Zhi Zheng, University of WollongongFollow
Wanlin WangFollow
Lei Wang, University of WollongongFollow
Yaojie Lei, University of WollongongFollow
Yunxiao Wang, University of WollongongFollow
Jiazhao Wang, University of WollongongFollow
Hua-Kun Liu, University of WollongongFollow
Shulei Chou, University of WollongongFollow
Shi Xue Dou, University of WollongongFollow

RIS ID

144235

Publication Details

Lai, W., Zheng, Z., Wang, W., Wang, L., Lei, Y., Wang, Y., Wang, J., Liu, H., Chou, S. & Dou, S. (2020). Self-assembling RuO2 nanogranulates with few carbon layers as an interconnected nanoporous structure for lithium-oxygen batteries. Chemical Communications, 56 (53), 7253-7256.

Abstract

Electrocatalysis for cathodic oxygen is of great significance for achieving high-performance lithium-oxygen batteries. Herein, we report a facile and green method to prepare an interconnected nanoporous three-dimensional (3D) architecture, which is composed of RuO2 nanogranulates coated with few layers of carbon. The as-prepared 3D nanoporous RuO2@C nanostructure can demonstrate a high initial specific discharge capacity of 4000 mA h g-1 with high round-trip efficiency of 95%. Meanwhile, the nanoporous RuO2@C could achieve stable cycling performance with a fixed capacity of 1500 mA h g-1 over 100 cycles. The terminal discharge and charge potentials of nanoporous RuO2@C are well maintained with minor potential variation of 0.14 and 0.13 V at the 100th cycle, respectively. In addition, the formation of discharge products is monitored by using in situ high-energy synchrotron X-ray diffraction (XRD).