High‐performant all‐organic aqueous sodium‐ion batteries enabled by PTCDA electrodes and a hybrid Na/Mg electrolyte
Artikel i vetenskaplig tidskrift, 2021

Aqueous sodium-ion batteries (ASIBs) are aspiring candidates for low environmental impact energy storage, especially when using organic electrodes. In this respect, perylene-3,4,9,10-tetracarboxylic dianhydride (PTCDA) is a promising anode active material, but it suffers from extensive dissolution in conventional aqueous electrolytes. As a remedy, we here present a novel aqueous electrolyte, which inhibits the PTCDA dissolution and enables their use as all-organic ASIB anodes with high capacity retention and Coulombic efficiencies. Furthermore, the electrolyte is based on two, hence “hybrid”, inexpensive and non-fluorinated Na/Mg-salts, it displays favourable physico-chemical properties and an electrochemical stability window >3 V without resorting to the extreme salt concentrations of water-in-salt electrolytes. Altogether, this paves the way for ASIBs with both relatively high energy densities, inexpensive total cell chemistries, long-term sustainability, and improved safety.

anode

all-organic

PTCDA

aqueous electrolyte

sodium-ion battery

Författare

Martin Karlsmo

Chalmers, Fysik, Materialfysik

Roza Bouchal

Chalmers, Fysik, Materialfysik

Patrik Johansson

Alistore - European Research Institute

Chalmers, Fysik, Materialfysik

Angewandte Chemie - International Edition

1433-7851 (ISSN) 1521-3773 (eISSN)

Vol. In press

Ämneskategorier

Materialkemi

DOI

10.1002/anie.202111620

Mer information

Senast uppdaterat

2021-11-04