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

Journal Article


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).

Publication Date


  • 2020

Citation


  • 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.

Scopus Eid


  • 2-s2.0-85087529418

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/4218

Number Of Pages


  • 3

Start Page


  • 7253

End Page


  • 7256

Volume


  • 56

Issue


  • 53

Place Of Publication


  • United Kingdom

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).

Publication Date


  • 2020

Citation


  • 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.

Scopus Eid


  • 2-s2.0-85087529418

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/4218

Number Of Pages


  • 3

Start Page


  • 7253

End Page


  • 7256

Volume


  • 56

Issue


  • 53

Place Of Publication


  • United Kingdom