Jump to main content
Jump to site search

Issue 78, 2019
Previous Article Next Article

Metal-ion batteries meet supercapacitors: high capacity and high rate capability rechargeable batteries with organic cathodes and a Na/K alloy anode

Author affiliations

Abstract

In this study, a dendrite-free liquid sodium–potassium alloy (NaK) anode with high capacity, a low reduction potential and fast kinetics was paired with two organic polymer cathodes, poly(N-phenyl-5,10-dihydrophenazine) (P1) and poly(hexaazatrinaphthylene) (P2), in metal-ion batteries. A high energy density of 631 W h kg−1 was achieved for one of the polymers (P1) at a discharge current density of 0.2 A g−1 (∼1C rate), while a still impressive specific energy of 443 W h kg−1 was achieved at 20 A g−1 (∼160C rate), which is an unprecedented value for post-lithium battery cathodes. Outstanding power densities of >105 W kg−1 were demonstrated, thus boosting the rate capability of metal-ion batteries to the level of high-power supercapacitors. Moreover, excellent cyclability was demonstrated, with only 11% capacity loss after 10 000 charge/discharge cycles at 10 A g−1 for cathodes based on P2.

Graphical abstract: Metal-ion batteries meet supercapacitors: high capacity and high rate capability rechargeable batteries with organic cathodes and a Na/K alloy anode

Back to tab navigation

Supplementary files

Article information


Submitted
24 Jul 2019
Accepted
03 Sep 2019
First published
04 Sep 2019

Chem. Commun., 2019,55, 11758-11761
Article type
Communication

Metal-ion batteries meet supercapacitors: high capacity and high rate capability rechargeable batteries with organic cathodes and a Na/K alloy anode

R. R. Kapaev, F. A. Obrezkov, K. J. Stevenson and P. A. Troshin, Chem. Commun., 2019, 55, 11758
DOI: 10.1039/C9CC05745E

Social activity

Search articles by author

Spotlight

Advertisements