Porous Co 3 O 4 nanorods anchored on graphene nanosheets as an effective electrocatalysts for aprotic Li-O 2 batteries

19Citations
Citations of this article
16Readers
Mendeley users who have this article in their library.

Abstract

The large over-potential during the battery operation is a great obstacle for the application of Li-O 2 batteries. The porous structure and electrical conductivity of the electrocatalysts are significant for the electrocatalytic performance of Li-O 2 batteries. In this work, a porous Co 3 O 4 /GN nanocomposite (Co 3 O 4 nanorods anchored on graphene nanosheets) is prepared via a facile hydrothermal method assisted with heat treatment. The unique structure of Co 3 O 4 /GN endows efficient electrocatalystic activity for Li-O 2 batteries. In comparison to the Co 3 O 4 , the Co 3 O 4 /GN demonstrates a better cycle performance showing more than 40 cycles with a 1500 mAh g −1 capacity limit strategy at a current density of 300 mA g −1 , and a reduced over-potential of 110 mV at high current density (1200 mA g −1 ). The Co 3 O 4 /GN also displays a high initial specific capacity (7600 mAh g −1 ) and a good reversibility in full cycle with a coulombic efficiency of 99.8% in the first cycle. The impressed cyclability, specific capacity, rate performance, and low over-potentials indicate that the as-prepared Co 3 O 4 /GN nanocomposite is a promising catalyst candidate for reversible Li-O 2 batteries.

Cite

CITATION STYLE

APA

Yuan, M., Yang, Y., Nan, C., Sun, G., Li, H., & Ma, S. (2018). Porous Co 3 O 4 nanorods anchored on graphene nanosheets as an effective electrocatalysts for aprotic Li-O 2 batteries. Applied Surface Science, 444, 312–319. https://doi.org/10.1016/j.apsusc.2018.02.267

Register to see more suggestions

Mendeley helps you to discover research relevant for your work.

Already have an account?

Save time finding and organizing research with Mendeley

Sign up for free