Jump to main content
Jump to site search


Coordination Polymer Derived Co3O4/Co-N@NMC Composite Material as Zn-air Battery Cathode Electrocatalyst and Microwave Absorber

Abstract

Zn-air battery, the promising energy storage equipment with high energy density, lightweight and compact structure, is a perfect power source for electric vehicles. For Zn-air battery, the activity of air cathode electrocatalyst plays an important role in its performance. Here, employing coordination polymer as precursor, a composite material built from Co3O4, Co-N active centres with nitrogen doped mesoporous carbon as matrix had been synthesized successfully. This composite material possesses outstanding activity and stability in oxygen reduction (ORR) and oxygen evolution reaction (OER) process. It possesses small half-wave potential (ORR1/2 = 0.786 V), low overpotential (OER10 = 1.575 V) for ORR and OER, respectively. With this composite material as air cathode electrocatalyst, a rechargeable Zn-air battery is assembled successfully. In discharge process, the maximum power density of this Zn-air battery achieves 122 mW•cm-2 at 0.76 V. The specific capacity of this battery is 505 mAh•g-1 at 25 mA•cm-2. The voltage gap between charge and discharge process is only 0.744 V at 10 mA•cm-2 and 1.308 V at 100 mA•cm-2. This rechargeable battery also shows promising stability after long time charge-discharge experiments. Furthermore, the composite material also exhibits outstanding microwave adsorption property. Its maximum reflection loss (RL) arrives at -13.9 dB with the thickness only 1.0 mm. Thus, we find coordination polymer is an ideal precursor for Zn-air battery cathode electrocatalyst and microwave absorber.

Back to tab navigation

Supplementary files

Publication details

The article was received on 19 Sep 2018, accepted on 03 Oct 2018 and first published on 08 Oct 2018


Article type: Paper
DOI: 10.1039/C8DT03792B
Citation: Dalton Trans., 2018, Accepted Manuscript
  •   Request permissions

    Coordination Polymer Derived Co3O4/Co-N@NMC Composite Material as Zn-air Battery Cathode Electrocatalyst and Microwave Absorber

    Y. Wang, X. Xu, L. Liu, J. Chen and G. Shi, Dalton Trans., 2018, Accepted Manuscript , DOI: 10.1039/C8DT03792B

Search articles by author

Spotlight

Advertisements