Jump to main content
Jump to site search

Issue 23, 2018
Previous Article Next Article

Advanced perspective on the synchronized bifunctional activities of P2-type materials to implement an interconnected voltage profile for seawater batteries

Author affiliations

Abstract

Electrical energy storage on a large-scale is essential to the ultimate use of natural and clean renewable energy sources. Recently, research and development attempts toward a room-temperature seawater battery (SWB) have been rejuvenated, as SWBs are considered capable, low-cost substitutes to the existing Li-ion battery technology for large-scale usage. In this work, P2-type layered Na0.5Co0.5Mn0.5O2 oxide was discovered for the first time to be a new option of a bifunctional cathode electrocatalyst material for an aqueous SWB, with two kinds of voltage profiles, a slope and flat voltage region, corresponding to the Na+ ion intercalation–deintercalation reaction and OER/ORR catalytic activities in comparison with a carbon felt substrate and 20% Pt/C catalyst. A developed electrocatalyst for the cathode of the SWB demonstrated excellent activity and provided a discharge capacity of ∼30 mA h g−1 ascribed to Na+-ion intercalation–deintercalation reaction, while cyclic voltammetric analysis corroborated with the redox peak at 3.31/3.04 V for Co3+/4+ redox species in comparison with a carbon felt substrate. Further, the OER and ORR catalytic activities of the electrocatalyst were confirmed with a full-cell seawater battery, which exhibited a lower voltage difference of 0.36 V and delivered a hard carbon discharge capacity of 183 mA h g−1 at 0.1 mA. Consequently, this cathode was demonstrated to have an integrated voltage profile for a seawater battery, showing its potential to work on a commercial scale.

Graphical abstract: Advanced perspective on the synchronized bifunctional activities of P2-type materials to implement an interconnected voltage profile for seawater batteries

Back to tab navigation

Supplementary files

Publication details

The article was received on 22 Mar 2018, accepted on 10 May 2018 and first published on 11 May 2018


Article type: Paper
DOI: 10.1039/C8TA02667J
Citation: J. Mater. Chem. A, 2018,6, 11012-11021
  •   Request permissions

    Advanced perspective on the synchronized bifunctional activities of P2-type materials to implement an interconnected voltage profile for seawater batteries

    P. Manikandan, K. Kishor, J. Han and Y. Kim, J. Mater. Chem. A, 2018, 6, 11012
    DOI: 10.1039/C8TA02667J

Search articles by author

Spotlight

Advertisements