Issue 5, 2020

Integrating ZnCo2O4 submicro/nanospheres with CoxSey nanosheets for the oxygen evolution reaction and zinc–air batteries

Abstract

Developing low cost, high-efficiency and robust electrocatalysts to boost the oxygen evolution reaction (OER) is of great significance for clean energy storage and conversion devices such as electrochemical water splitting devices, rechargeable zinc–air batteries, and so on. In this study, we present a facile means to integrate ZnCo2O4 submicro/nanospheres with CoxSey (x and y denote the molar ratio of Co and Se, respectively) nanosheets, and such a composite exhibited excellent OER activity with an overpotential of 324 mV at 10 mA cm−2 in 1 M KOH. It also exhibited superior long-term stability to the benchmark IrO2 catalyst. In the home-made zinc–air battery test, the battery modified with the composite as the air cathode showed excellent performance with a small voltage gap of 0.98 V at 50 mA cm−2, a high power density of 212.9 mW cm−2, a high specific capacity of 570.1 mA h g−1, and a stable cycling stability (50 h) at 10 mA cm−2 with a round-trip efficiency of 56.3%, superior to the IrO2/C counterpart. This study can provide an avenue for developing cost effective, efficient and durable OER electrocatalysts as alternatives for various renewable energy storage and conversion devices.

Graphical abstract: Integrating ZnCo2O4 submicro/nanospheres with CoxSey nanosheets for the oxygen evolution reaction and zinc–air batteries

Supplementary files

Article information

Article type
Paper
Submitted
18 12月 2019
Accepted
11 2月 2020
First published
12 2月 2020

Sustainable Energy Fuels, 2020,4, 2184-2191

Integrating ZnCo2O4 submicro/nanospheres with CoxSey nanosheets for the oxygen evolution reaction and zinc–air batteries

Z. Mai, W. Duan, K. Wang, Z. Tang and S. Chen, Sustainable Energy Fuels, 2020, 4, 2184 DOI: 10.1039/C9SE01253B

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements